4 * Copyright (C) Linus Torvalds, 2005
6 * This applies patches on top of some (arbitrary) version of the SCM.
12 #include "object-store.h"
17 #include "xdiff-interface.h"
20 #include "parse-options.h"
31 static void git_apply_config(void)
33 git_config_get_string("apply.whitespace", &apply_default_whitespace);
34 git_config_get_string("apply.ignorewhitespace", &apply_default_ignorewhitespace);
35 git_config(git_xmerge_config, NULL);
38 static int parse_whitespace_option(struct apply_state *state, const char *option)
41 state->ws_error_action = warn_on_ws_error;
44 if (!strcmp(option, "warn")) {
45 state->ws_error_action = warn_on_ws_error;
48 if (!strcmp(option, "nowarn")) {
49 state->ws_error_action = nowarn_ws_error;
52 if (!strcmp(option, "error")) {
53 state->ws_error_action = die_on_ws_error;
56 if (!strcmp(option, "error-all")) {
57 state->ws_error_action = die_on_ws_error;
58 state->squelch_whitespace_errors = 0;
61 if (!strcmp(option, "strip") || !strcmp(option, "fix")) {
62 state->ws_error_action = correct_ws_error;
66 * Please update $__git_whitespacelist in git-completion.bash
67 * when you add new options.
69 return error(_("unrecognized whitespace option '%s'"), option);
72 static int parse_ignorewhitespace_option(struct apply_state *state,
75 if (!option || !strcmp(option, "no") ||
76 !strcmp(option, "false") || !strcmp(option, "never") ||
77 !strcmp(option, "none")) {
78 state->ws_ignore_action = ignore_ws_none;
81 if (!strcmp(option, "change")) {
82 state->ws_ignore_action = ignore_ws_change;
85 return error(_("unrecognized whitespace ignore option '%s'"), option);
88 int init_apply_state(struct apply_state *state,
89 struct repository *repo,
92 memset(state, 0, sizeof(*state));
93 state->prefix = prefix;
96 state->line_termination = '\n';
98 state->p_context = UINT_MAX;
99 state->squelch_whitespace_errors = 5;
100 state->ws_error_action = warn_on_ws_error;
101 state->ws_ignore_action = ignore_ws_none;
103 string_list_init(&state->fn_table, 0);
104 string_list_init(&state->limit_by_name, 0);
105 string_list_init(&state->symlink_changes, 0);
106 strbuf_init(&state->root, 0);
109 if (apply_default_whitespace && parse_whitespace_option(state, apply_default_whitespace))
111 if (apply_default_ignorewhitespace && parse_ignorewhitespace_option(state, apply_default_ignorewhitespace))
116 void clear_apply_state(struct apply_state *state)
118 string_list_clear(&state->limit_by_name, 0);
119 string_list_clear(&state->symlink_changes, 0);
120 strbuf_release(&state->root);
122 /* &state->fn_table is cleared at the end of apply_patch() */
125 static void mute_routine(const char *msg, va_list params)
130 int check_apply_state(struct apply_state *state, int force_apply)
132 int is_not_gitdir = !startup_info->have_repository;
134 if (state->apply_with_reject && state->threeway)
135 return error(_("--reject and --3way cannot be used together."));
136 if (state->cached && state->threeway)
137 return error(_("--cached and --3way cannot be used together."));
138 if (state->threeway) {
140 return error(_("--3way outside a repository"));
141 state->check_index = 1;
143 if (state->apply_with_reject) {
145 if (state->apply_verbosity == verbosity_normal)
146 state->apply_verbosity = verbosity_verbose;
148 if (!force_apply && (state->diffstat || state->numstat || state->summary || state->check || state->fake_ancestor))
150 if (state->check_index && is_not_gitdir)
151 return error(_("--index outside a repository"));
154 return error(_("--cached outside a repository"));
155 state->check_index = 1;
157 if (state->ita_only && (state->check_index || is_not_gitdir))
159 if (state->check_index)
160 state->unsafe_paths = 0;
162 if (state->apply_verbosity <= verbosity_silent) {
163 state->saved_error_routine = get_error_routine();
164 state->saved_warn_routine = get_warn_routine();
165 set_error_routine(mute_routine);
166 set_warn_routine(mute_routine);
172 static void set_default_whitespace_mode(struct apply_state *state)
174 if (!state->whitespace_option && !apply_default_whitespace)
175 state->ws_error_action = (state->apply ? warn_on_ws_error : nowarn_ws_error);
179 * This represents one "hunk" from a patch, starting with
180 * "@@ -oldpos,oldlines +newpos,newlines @@" marker. The
181 * patch text is pointed at by patch, and its byte length
182 * is stored in size. leading and trailing are the number
186 unsigned long leading, trailing;
187 unsigned long oldpos, oldlines;
188 unsigned long newpos, newlines;
190 * 'patch' is usually borrowed from buf in apply_patch(),
191 * but some codepaths store an allocated buffer.
194 unsigned free_patch:1,
198 struct fragment *next;
202 * When dealing with a binary patch, we reuse "leading" field
203 * to store the type of the binary hunk, either deflated "delta"
204 * or deflated "literal".
206 #define binary_patch_method leading
207 #define BINARY_DELTA_DEFLATED 1
208 #define BINARY_LITERAL_DEFLATED 2
210 static void free_fragment_list(struct fragment *list)
213 struct fragment *next = list->next;
214 if (list->free_patch)
215 free((char *)list->patch);
221 static void free_patch(struct patch *patch)
223 free_fragment_list(patch->fragments);
224 free(patch->def_name);
225 free(patch->old_name);
226 free(patch->new_name);
231 static void free_patch_list(struct patch *list)
234 struct patch *next = list->next;
241 * A line in a file, len-bytes long (includes the terminating LF,
242 * except for an incomplete line at the end if the file ends with
243 * one), and its contents hashes to 'hash'.
249 #define LINE_COMMON 1
250 #define LINE_PATCHED 2
254 * This represents a "file", which is an array of "lines".
261 struct line *line_allocated;
265 static uint32_t hash_line(const char *cp, size_t len)
269 for (i = 0, h = 0; i < len; i++) {
270 if (!isspace(cp[i])) {
271 h = h * 3 + (cp[i] & 0xff);
278 * Compare lines s1 of length n1 and s2 of length n2, ignoring
279 * whitespace difference. Returns 1 if they match, 0 otherwise
281 static int fuzzy_matchlines(const char *s1, size_t n1,
282 const char *s2, size_t n2)
284 const char *end1 = s1 + n1;
285 const char *end2 = s2 + n2;
287 /* ignore line endings */
288 while (s1 < end1 && (end1[-1] == '\r' || end1[-1] == '\n'))
290 while (s2 < end2 && (end2[-1] == '\r' || end2[-1] == '\n'))
293 while (s1 < end1 && s2 < end2) {
296 * Skip whitespace. We check on both buffers
297 * because we don't want "a b" to match "ab".
301 while (s1 < end1 && isspace(*s1))
303 while (s2 < end2 && isspace(*s2))
305 } else if (*s1++ != *s2++)
309 /* If we reached the end on one side only, lines don't match. */
310 return s1 == end1 && s2 == end2;
313 static void add_line_info(struct image *img, const char *bol, size_t len, unsigned flag)
315 ALLOC_GROW(img->line_allocated, img->nr + 1, img->alloc);
316 img->line_allocated[img->nr].len = len;
317 img->line_allocated[img->nr].hash = hash_line(bol, len);
318 img->line_allocated[img->nr].flag = flag;
323 * "buf" has the file contents to be patched (read from various sources).
324 * attach it to "image" and add line-based index to it.
325 * "image" now owns the "buf".
327 static void prepare_image(struct image *image, char *buf, size_t len,
328 int prepare_linetable)
332 memset(image, 0, sizeof(*image));
336 if (!prepare_linetable)
339 ep = image->buf + image->len;
343 for (next = cp; next < ep && *next != '\n'; next++)
347 add_line_info(image, cp, next - cp, 0);
350 image->line = image->line_allocated;
353 static void clear_image(struct image *image)
356 free(image->line_allocated);
357 memset(image, 0, sizeof(*image));
360 /* fmt must contain _one_ %s and no other substitution */
361 static void say_patch_name(FILE *output, const char *fmt, struct patch *patch)
363 struct strbuf sb = STRBUF_INIT;
365 if (patch->old_name && patch->new_name &&
366 strcmp(patch->old_name, patch->new_name)) {
367 quote_c_style(patch->old_name, &sb, NULL, 0);
368 strbuf_addstr(&sb, " => ");
369 quote_c_style(patch->new_name, &sb, NULL, 0);
371 const char *n = patch->new_name;
374 quote_c_style(n, &sb, NULL, 0);
376 fprintf(output, fmt, sb.buf);
383 static int read_patch_file(struct strbuf *sb, int fd)
385 if (strbuf_read(sb, fd, 0) < 0)
386 return error_errno("git apply: failed to read");
389 * Make sure that we have some slop in the buffer
390 * so that we can do speculative "memcmp" etc, and
391 * see to it that it is NUL-filled.
393 strbuf_grow(sb, SLOP);
394 memset(sb->buf + sb->len, 0, SLOP);
398 static unsigned long linelen(const char *buffer, unsigned long size)
400 unsigned long len = 0;
403 if (*buffer++ == '\n')
409 static int is_dev_null(const char *str)
411 return skip_prefix(str, "/dev/null", &str) && isspace(*str);
417 static int name_terminate(int c, int terminate)
419 if (c == ' ' && !(terminate & TERM_SPACE))
421 if (c == '\t' && !(terminate & TERM_TAB))
427 /* remove double slashes to make --index work with such filenames */
428 static char *squash_slash(char *name)
436 if ((name[j++] = name[i++]) == '/')
437 while (name[i] == '/')
444 static char *find_name_gnu(struct strbuf *root,
448 struct strbuf name = STRBUF_INIT;
452 * Proposed "new-style" GNU patch/diff format; see
453 * https://lore.kernel.org/git/7vll0wvb2a.fsf@assigned-by-dhcp.cox.net/
455 if (unquote_c_style(&name, line, NULL)) {
456 strbuf_release(&name);
460 for (cp = name.buf; p_value; p_value--) {
461 cp = strchr(cp, '/');
463 strbuf_release(&name);
469 strbuf_remove(&name, 0, cp - name.buf);
471 strbuf_insert(&name, 0, root->buf, root->len);
472 return squash_slash(strbuf_detach(&name, NULL));
475 static size_t sane_tz_len(const char *line, size_t len)
479 if (len < strlen(" +0500") || line[len-strlen(" +0500")] != ' ')
481 tz = line + len - strlen(" +0500");
483 if (tz[1] != '+' && tz[1] != '-')
486 for (p = tz + 2; p != line + len; p++)
490 return line + len - tz;
493 static size_t tz_with_colon_len(const char *line, size_t len)
497 if (len < strlen(" +08:00") || line[len - strlen(":00")] != ':')
499 tz = line + len - strlen(" +08:00");
501 if (tz[0] != ' ' || (tz[1] != '+' && tz[1] != '-'))
504 if (!isdigit(*p++) || !isdigit(*p++) || *p++ != ':' ||
505 !isdigit(*p++) || !isdigit(*p++))
508 return line + len - tz;
511 static size_t date_len(const char *line, size_t len)
513 const char *date, *p;
515 if (len < strlen("72-02-05") || line[len-strlen("-05")] != '-')
517 p = date = line + len - strlen("72-02-05");
519 if (!isdigit(*p++) || !isdigit(*p++) || *p++ != '-' ||
520 !isdigit(*p++) || !isdigit(*p++) || *p++ != '-' ||
521 !isdigit(*p++) || !isdigit(*p++)) /* Not a date. */
524 if (date - line >= strlen("19") &&
525 isdigit(date[-1]) && isdigit(date[-2])) /* 4-digit year */
526 date -= strlen("19");
528 return line + len - date;
531 static size_t short_time_len(const char *line, size_t len)
533 const char *time, *p;
535 if (len < strlen(" 07:01:32") || line[len-strlen(":32")] != ':')
537 p = time = line + len - strlen(" 07:01:32");
539 /* Permit 1-digit hours? */
541 !isdigit(*p++) || !isdigit(*p++) || *p++ != ':' ||
542 !isdigit(*p++) || !isdigit(*p++) || *p++ != ':' ||
543 !isdigit(*p++) || !isdigit(*p++)) /* Not a time. */
546 return line + len - time;
549 static size_t fractional_time_len(const char *line, size_t len)
554 /* Expected format: 19:41:17.620000023 */
555 if (!len || !isdigit(line[len - 1]))
559 /* Fractional seconds. */
560 while (p > line && isdigit(*p))
565 /* Hours, minutes, and whole seconds. */
566 n = short_time_len(line, p - line);
570 return line + len - p + n;
573 static size_t trailing_spaces_len(const char *line, size_t len)
577 /* Expected format: ' ' x (1 or more) */
578 if (!len || line[len - 1] != ' ')
585 return line + len - (p + 1);
592 static size_t diff_timestamp_len(const char *line, size_t len)
594 const char *end = line + len;
598 * Posix: 2010-07-05 19:41:17
599 * GNU: 2010-07-05 19:41:17.620000023 -0500
602 if (!isdigit(end[-1]))
605 n = sane_tz_len(line, end - line);
607 n = tz_with_colon_len(line, end - line);
610 n = short_time_len(line, end - line);
612 n = fractional_time_len(line, end - line);
615 n = date_len(line, end - line);
616 if (!n) /* No date. Too bad. */
620 if (end == line) /* No space before date. */
622 if (end[-1] == '\t') { /* Success! */
624 return line + len - end;
626 if (end[-1] != ' ') /* No space before date. */
629 /* Whitespace damage. */
630 end -= trailing_spaces_len(line, end - line);
631 return line + len - end;
634 static char *find_name_common(struct strbuf *root,
642 const char *start = NULL;
646 while (line != end) {
649 if (!end && isspace(c)) {
652 if (name_terminate(c, terminate))
656 if (c == '/' && !--p_value)
660 return squash_slash(xstrdup_or_null(def));
663 return squash_slash(xstrdup_or_null(def));
666 * Generally we prefer the shorter name, especially
667 * if the other one is just a variation of that with
668 * something else tacked on to the end (ie "file.orig"
672 int deflen = strlen(def);
673 if (deflen < len && !strncmp(start, def, deflen))
674 return squash_slash(xstrdup(def));
678 char *ret = xstrfmt("%s%.*s", root->buf, len, start);
679 return squash_slash(ret);
682 return squash_slash(xmemdupz(start, len));
685 static char *find_name(struct strbuf *root,
692 char *name = find_name_gnu(root, line, p_value);
697 return find_name_common(root, line, def, p_value, NULL, terminate);
700 static char *find_name_traditional(struct strbuf *root,
709 char *name = find_name_gnu(root, line, p_value);
714 len = strchrnul(line, '\n') - line;
715 date_len = diff_timestamp_len(line, len);
717 return find_name_common(root, line, def, p_value, NULL, TERM_TAB);
720 return find_name_common(root, line, def, p_value, line + len, 0);
724 * Given the string after "--- " or "+++ ", guess the appropriate
725 * p_value for the given patch.
727 static int guess_p_value(struct apply_state *state, const char *nameline)
732 if (is_dev_null(nameline))
734 name = find_name_traditional(&state->root, nameline, NULL, 0);
737 cp = strchr(name, '/');
740 else if (state->prefix) {
742 * Does it begin with "a/$our-prefix" and such? Then this is
743 * very likely to apply to our directory.
745 if (starts_with(name, state->prefix))
746 val = count_slashes(state->prefix);
749 if (starts_with(cp, state->prefix))
750 val = count_slashes(state->prefix) + 1;
758 * Does the ---/+++ line have the POSIX timestamp after the last HT?
759 * GNU diff puts epoch there to signal a creation/deletion event. Is
760 * this such a timestamp?
762 static int has_epoch_timestamp(const char *nameline)
765 * We are only interested in epoch timestamp; any non-zero
766 * fraction cannot be one, hence "(\.0+)?" in the regexp below.
767 * For the same reason, the date must be either 1969-12-31 or
768 * 1970-01-01, and the seconds part must be "00".
770 const char stamp_regexp[] =
771 "^[0-2][0-9]:([0-5][0-9]):00(\\.0+)?"
773 "([-+][0-2][0-9]:?[0-5][0-9])\n";
774 const char *timestamp = NULL, *cp, *colon;
775 static regex_t *stamp;
777 int zoneoffset, epoch_hour, hour, minute;
780 for (cp = nameline; *cp != '\n'; cp++) {
788 * YYYY-MM-DD hh:mm:ss must be from either 1969-12-31
789 * (west of GMT) or 1970-01-01 (east of GMT)
791 if (skip_prefix(timestamp, "1969-12-31 ", ×tamp))
793 else if (skip_prefix(timestamp, "1970-01-01 ", ×tamp))
799 stamp = xmalloc(sizeof(*stamp));
800 if (regcomp(stamp, stamp_regexp, REG_EXTENDED)) {
801 warning(_("Cannot prepare timestamp regexp %s"),
807 status = regexec(stamp, timestamp, ARRAY_SIZE(m), m, 0);
809 if (status != REG_NOMATCH)
810 warning(_("regexec returned %d for input: %s"),
815 hour = strtol(timestamp, NULL, 10);
816 minute = strtol(timestamp + m[1].rm_so, NULL, 10);
818 zoneoffset = strtol(timestamp + m[3].rm_so + 1, (char **) &colon, 10);
820 zoneoffset = zoneoffset * 60 + strtol(colon + 1, NULL, 10);
822 zoneoffset = (zoneoffset / 100) * 60 + (zoneoffset % 100);
823 if (timestamp[m[3].rm_so] == '-')
824 zoneoffset = -zoneoffset;
826 return hour * 60 + minute - zoneoffset == epoch_hour * 60;
830 * Get the name etc info from the ---/+++ lines of a traditional patch header
832 * FIXME! The end-of-filename heuristics are kind of screwy. For existing
833 * files, we can happily check the index for a match, but for creating a
834 * new file we should try to match whatever "patch" does. I have no idea.
836 static int parse_traditional_patch(struct apply_state *state,
843 first += 4; /* skip "--- " */
844 second += 4; /* skip "+++ " */
845 if (!state->p_value_known) {
847 p = guess_p_value(state, first);
848 q = guess_p_value(state, second);
850 if (0 <= p && p == q) {
852 state->p_value_known = 1;
855 if (is_dev_null(first)) {
857 patch->is_delete = 0;
858 name = find_name_traditional(&state->root, second, NULL, state->p_value);
859 patch->new_name = name;
860 } else if (is_dev_null(second)) {
862 patch->is_delete = 1;
863 name = find_name_traditional(&state->root, first, NULL, state->p_value);
864 patch->old_name = name;
867 first_name = find_name_traditional(&state->root, first, NULL, state->p_value);
868 name = find_name_traditional(&state->root, second, first_name, state->p_value);
870 if (has_epoch_timestamp(first)) {
872 patch->is_delete = 0;
873 patch->new_name = name;
874 } else if (has_epoch_timestamp(second)) {
876 patch->is_delete = 1;
877 patch->old_name = name;
879 patch->old_name = name;
880 patch->new_name = xstrdup_or_null(name);
884 return error(_("unable to find filename in patch at line %d"), state->linenr);
889 static int gitdiff_hdrend(struct gitdiff_data *state,
897 * We're anal about diff header consistency, to make
898 * sure that we don't end up having strange ambiguous
899 * patches floating around.
901 * As a result, gitdiff_{old|new}name() will check
902 * their names against any previous information, just
905 #define DIFF_OLD_NAME 0
906 #define DIFF_NEW_NAME 1
908 static int gitdiff_verify_name(struct gitdiff_data *state,
914 if (!*name && !isnull) {
915 *name = find_name(state->root, line, NULL, state->p_value, TERM_TAB);
922 return error(_("git apply: bad git-diff - expected /dev/null, got %s on line %d"),
923 *name, state->linenr);
924 another = find_name(state->root, line, NULL, state->p_value, TERM_TAB);
925 if (!another || strcmp(another, *name)) {
927 return error((side == DIFF_NEW_NAME) ?
928 _("git apply: bad git-diff - inconsistent new filename on line %d") :
929 _("git apply: bad git-diff - inconsistent old filename on line %d"), state->linenr);
933 if (!is_dev_null(line))
934 return error(_("git apply: bad git-diff - expected /dev/null on line %d"), state->linenr);
940 static int gitdiff_oldname(struct gitdiff_data *state,
944 return gitdiff_verify_name(state, line,
945 patch->is_new, &patch->old_name,
949 static int gitdiff_newname(struct gitdiff_data *state,
953 return gitdiff_verify_name(state, line,
954 patch->is_delete, &patch->new_name,
958 static int parse_mode_line(const char *line, int linenr, unsigned int *mode)
961 *mode = strtoul(line, &end, 8);
962 if (end == line || !isspace(*end))
963 return error(_("invalid mode on line %d: %s"), linenr, line);
967 static int gitdiff_oldmode(struct gitdiff_data *state,
971 return parse_mode_line(line, state->linenr, &patch->old_mode);
974 static int gitdiff_newmode(struct gitdiff_data *state,
978 return parse_mode_line(line, state->linenr, &patch->new_mode);
981 static int gitdiff_delete(struct gitdiff_data *state,
985 patch->is_delete = 1;
986 free(patch->old_name);
987 patch->old_name = xstrdup_or_null(patch->def_name);
988 return gitdiff_oldmode(state, line, patch);
991 static int gitdiff_newfile(struct gitdiff_data *state,
996 free(patch->new_name);
997 patch->new_name = xstrdup_or_null(patch->def_name);
998 return gitdiff_newmode(state, line, patch);
1001 static int gitdiff_copysrc(struct gitdiff_data *state,
1003 struct patch *patch)
1006 free(patch->old_name);
1007 patch->old_name = find_name(state->root, line, NULL, state->p_value ? state->p_value - 1 : 0, 0);
1011 static int gitdiff_copydst(struct gitdiff_data *state,
1013 struct patch *patch)
1016 free(patch->new_name);
1017 patch->new_name = find_name(state->root, line, NULL, state->p_value ? state->p_value - 1 : 0, 0);
1021 static int gitdiff_renamesrc(struct gitdiff_data *state,
1023 struct patch *patch)
1025 patch->is_rename = 1;
1026 free(patch->old_name);
1027 patch->old_name = find_name(state->root, line, NULL, state->p_value ? state->p_value - 1 : 0, 0);
1031 static int gitdiff_renamedst(struct gitdiff_data *state,
1033 struct patch *patch)
1035 patch->is_rename = 1;
1036 free(patch->new_name);
1037 patch->new_name = find_name(state->root, line, NULL, state->p_value ? state->p_value - 1 : 0, 0);
1041 static int gitdiff_similarity(struct gitdiff_data *state,
1043 struct patch *patch)
1045 unsigned long val = strtoul(line, NULL, 10);
1051 static int gitdiff_dissimilarity(struct gitdiff_data *state,
1053 struct patch *patch)
1055 unsigned long val = strtoul(line, NULL, 10);
1061 static int gitdiff_index(struct gitdiff_data *state,
1063 struct patch *patch)
1066 * index line is N hexadecimal, "..", N hexadecimal,
1067 * and optional space with octal mode.
1069 const char *ptr, *eol;
1071 const unsigned hexsz = the_hash_algo->hexsz;
1073 ptr = strchr(line, '.');
1074 if (!ptr || ptr[1] != '.' || hexsz < ptr - line)
1077 memcpy(patch->old_oid_prefix, line, len);
1078 patch->old_oid_prefix[len] = 0;
1081 ptr = strchr(line, ' ');
1082 eol = strchrnul(line, '\n');
1084 if (!ptr || eol < ptr)
1090 memcpy(patch->new_oid_prefix, line, len);
1091 patch->new_oid_prefix[len] = 0;
1093 return gitdiff_oldmode(state, ptr + 1, patch);
1098 * This is normal for a diff that doesn't change anything: we'll fall through
1099 * into the next diff. Tell the parser to break out.
1101 static int gitdiff_unrecognized(struct gitdiff_data *state,
1103 struct patch *patch)
1109 * Skip p_value leading components from "line"; as we do not accept
1110 * absolute paths, return NULL in that case.
1112 static const char *skip_tree_prefix(int p_value,
1120 return (llen && line[0] == '/') ? NULL : line;
1123 for (i = 0; i < llen; i++) {
1125 if (ch == '/' && --nslash <= 0)
1126 return (i == 0) ? NULL : &line[i + 1];
1132 * This is to extract the same name that appears on "diff --git"
1133 * line. We do not find and return anything if it is a rename
1134 * patch, and it is OK because we will find the name elsewhere.
1135 * We need to reliably find name only when it is mode-change only,
1136 * creation or deletion of an empty file. In any of these cases,
1137 * both sides are the same name under a/ and b/ respectively.
1139 static char *git_header_name(int p_value,
1144 const char *second = NULL;
1145 size_t len, line_len;
1147 line += strlen("diff --git ");
1148 llen -= strlen("diff --git ");
1152 struct strbuf first = STRBUF_INIT;
1153 struct strbuf sp = STRBUF_INIT;
1155 if (unquote_c_style(&first, line, &second))
1156 goto free_and_fail1;
1158 /* strip the a/b prefix including trailing slash */
1159 cp = skip_tree_prefix(p_value, first.buf, first.len);
1161 goto free_and_fail1;
1162 strbuf_remove(&first, 0, cp - first.buf);
1165 * second points at one past closing dq of name.
1166 * find the second name.
1168 while ((second < line + llen) && isspace(*second))
1171 if (line + llen <= second)
1172 goto free_and_fail1;
1173 if (*second == '"') {
1174 if (unquote_c_style(&sp, second, NULL))
1175 goto free_and_fail1;
1176 cp = skip_tree_prefix(p_value, sp.buf, sp.len);
1178 goto free_and_fail1;
1179 /* They must match, otherwise ignore */
1180 if (strcmp(cp, first.buf))
1181 goto free_and_fail1;
1182 strbuf_release(&sp);
1183 return strbuf_detach(&first, NULL);
1186 /* unquoted second */
1187 cp = skip_tree_prefix(p_value, second, line + llen - second);
1189 goto free_and_fail1;
1190 if (line + llen - cp != first.len ||
1191 memcmp(first.buf, cp, first.len))
1192 goto free_and_fail1;
1193 return strbuf_detach(&first, NULL);
1196 strbuf_release(&first);
1197 strbuf_release(&sp);
1201 /* unquoted first name */
1202 name = skip_tree_prefix(p_value, line, llen);
1207 * since the first name is unquoted, a dq if exists must be
1208 * the beginning of the second name.
1210 for (second = name; second < line + llen; second++) {
1211 if (*second == '"') {
1212 struct strbuf sp = STRBUF_INIT;
1215 if (unquote_c_style(&sp, second, NULL))
1216 goto free_and_fail2;
1218 np = skip_tree_prefix(p_value, sp.buf, sp.len);
1220 goto free_and_fail2;
1222 len = sp.buf + sp.len - np;
1223 if (len < second - name &&
1224 !strncmp(np, name, len) &&
1225 isspace(name[len])) {
1227 strbuf_remove(&sp, 0, np - sp.buf);
1228 return strbuf_detach(&sp, NULL);
1232 strbuf_release(&sp);
1238 * Accept a name only if it shows up twice, exactly the same
1241 second = strchr(name, '\n');
1244 line_len = second - name;
1245 for (len = 0 ; ; len++) {
1246 switch (name[len]) {
1251 case '\t': case ' ':
1253 * Is this the separator between the preimage
1254 * and the postimage pathname? Again, we are
1255 * only interested in the case where there is
1256 * no rename, as this is only to set def_name
1257 * and a rename patch has the names elsewhere
1258 * in an unambiguous form.
1261 return NULL; /* no postimage name */
1262 second = skip_tree_prefix(p_value, name + len + 1,
1263 line_len - (len + 1));
1267 * Does len bytes starting at "name" and "second"
1268 * (that are separated by one HT or SP we just
1269 * found) exactly match?
1271 if (second[len] == '\n' && !strncmp(name, second, len))
1272 return xmemdupz(name, len);
1277 static int check_header_line(int linenr, struct patch *patch)
1279 int extensions = (patch->is_delete == 1) + (patch->is_new == 1) +
1280 (patch->is_rename == 1) + (patch->is_copy == 1);
1282 return error(_("inconsistent header lines %d and %d"),
1283 patch->extension_linenr, linenr);
1284 if (extensions && !patch->extension_linenr)
1285 patch->extension_linenr = linenr;
1289 int parse_git_diff_header(struct strbuf *root,
1295 struct patch *patch)
1297 unsigned long offset;
1298 struct gitdiff_data parse_hdr_state;
1300 /* A git diff has explicit new/delete information, so we don't guess */
1302 patch->is_delete = 0;
1305 * Some things may not have the old name in the
1306 * rest of the headers anywhere (pure mode changes,
1307 * or removing or adding empty files), so we get
1308 * the default name from the header.
1310 patch->def_name = git_header_name(p_value, line, len);
1311 if (patch->def_name && root->len) {
1312 char *s = xstrfmt("%s%s", root->buf, patch->def_name);
1313 free(patch->def_name);
1314 patch->def_name = s;
1320 parse_hdr_state.root = root;
1321 parse_hdr_state.linenr = *linenr;
1322 parse_hdr_state.p_value = p_value;
1324 for (offset = len ; size > 0 ; offset += len, size -= len, line += len, (*linenr)++) {
1325 static const struct opentry {
1327 int (*fn)(struct gitdiff_data *, const char *, struct patch *);
1329 { "@@ -", gitdiff_hdrend },
1330 { "--- ", gitdiff_oldname },
1331 { "+++ ", gitdiff_newname },
1332 { "old mode ", gitdiff_oldmode },
1333 { "new mode ", gitdiff_newmode },
1334 { "deleted file mode ", gitdiff_delete },
1335 { "new file mode ", gitdiff_newfile },
1336 { "copy from ", gitdiff_copysrc },
1337 { "copy to ", gitdiff_copydst },
1338 { "rename old ", gitdiff_renamesrc },
1339 { "rename new ", gitdiff_renamedst },
1340 { "rename from ", gitdiff_renamesrc },
1341 { "rename to ", gitdiff_renamedst },
1342 { "similarity index ", gitdiff_similarity },
1343 { "dissimilarity index ", gitdiff_dissimilarity },
1344 { "index ", gitdiff_index },
1345 { "", gitdiff_unrecognized },
1349 len = linelen(line, size);
1350 if (!len || line[len-1] != '\n')
1352 for (i = 0; i < ARRAY_SIZE(optable); i++) {
1353 const struct opentry *p = optable + i;
1354 int oplen = strlen(p->str);
1356 if (len < oplen || memcmp(p->str, line, oplen))
1358 res = p->fn(&parse_hdr_state, line + oplen, patch);
1361 if (check_header_line(*linenr, patch))
1370 if (!patch->old_name && !patch->new_name) {
1371 if (!patch->def_name) {
1372 error(Q_("git diff header lacks filename information when removing "
1373 "%d leading pathname component (line %d)",
1374 "git diff header lacks filename information when removing "
1375 "%d leading pathname components (line %d)",
1376 parse_hdr_state.p_value),
1377 parse_hdr_state.p_value, *linenr);
1380 patch->old_name = xstrdup(patch->def_name);
1381 patch->new_name = xstrdup(patch->def_name);
1383 if ((!patch->new_name && !patch->is_delete) ||
1384 (!patch->old_name && !patch->is_new)) {
1385 error(_("git diff header lacks filename information "
1386 "(line %d)"), *linenr);
1389 patch->is_toplevel_relative = 1;
1393 static int parse_num(const char *line, unsigned long *p)
1397 if (!isdigit(*line))
1399 *p = strtoul(line, &ptr, 10);
1403 static int parse_range(const char *line, int len, int offset, const char *expect,
1404 unsigned long *p1, unsigned long *p2)
1408 if (offset < 0 || offset >= len)
1413 digits = parse_num(line, p1);
1423 digits = parse_num(line+1, p2);
1432 ex = strlen(expect);
1435 if (memcmp(line, expect, ex))
1441 static void recount_diff(const char *line, int size, struct fragment *fragment)
1443 int oldlines = 0, newlines = 0, ret = 0;
1446 warning("recount: ignore empty hunk");
1451 int len = linelen(line, size);
1459 case ' ': case '\n':
1471 ret = size < 3 || !starts_with(line, "@@ ");
1474 ret = size < 5 || !starts_with(line, "diff ");
1481 warning(_("recount: unexpected line: %.*s"),
1482 (int)linelen(line, size), line);
1487 fragment->oldlines = oldlines;
1488 fragment->newlines = newlines;
1492 * Parse a unified diff fragment header of the
1493 * form "@@ -a,b +c,d @@"
1495 static int parse_fragment_header(const char *line, int len, struct fragment *fragment)
1499 if (!len || line[len-1] != '\n')
1502 /* Figure out the number of lines in a fragment */
1503 offset = parse_range(line, len, 4, " +", &fragment->oldpos, &fragment->oldlines);
1504 offset = parse_range(line, len, offset, " @@", &fragment->newpos, &fragment->newlines);
1510 * Find file diff header
1513 * -1 if no header was found
1514 * -128 in case of error
1515 * the size of the header in bytes (called "offset") otherwise
1517 static int find_header(struct apply_state *state,
1521 struct patch *patch)
1523 unsigned long offset, len;
1525 patch->is_toplevel_relative = 0;
1526 patch->is_rename = patch->is_copy = 0;
1527 patch->is_new = patch->is_delete = -1;
1528 patch->old_mode = patch->new_mode = 0;
1529 patch->old_name = patch->new_name = NULL;
1530 for (offset = 0; size > 0; offset += len, size -= len, line += len, state->linenr++) {
1531 unsigned long nextlen;
1533 len = linelen(line, size);
1537 /* Testing this early allows us to take a few shortcuts.. */
1542 * Make sure we don't find any unconnected patch fragments.
1543 * That's a sign that we didn't find a header, and that a
1544 * patch has become corrupted/broken up.
1546 if (!memcmp("@@ -", line, 4)) {
1547 struct fragment dummy;
1548 if (parse_fragment_header(line, len, &dummy) < 0)
1550 error(_("patch fragment without header at line %d: %.*s"),
1551 state->linenr, (int)len-1, line);
1559 * Git patch? It might not have a real patch, just a rename
1560 * or mode change, so we handle that specially
1562 if (!memcmp("diff --git ", line, 11)) {
1563 int git_hdr_len = parse_git_diff_header(&state->root, &state->linenr,
1564 state->p_value, line, len,
1566 if (git_hdr_len < 0)
1568 if (git_hdr_len <= len)
1570 *hdrsize = git_hdr_len;
1574 /* --- followed by +++ ? */
1575 if (memcmp("--- ", line, 4) || memcmp("+++ ", line + len, 4))
1579 * We only accept unified patches, so we want it to
1580 * at least have "@@ -a,b +c,d @@\n", which is 14 chars
1581 * minimum ("@@ -0,0 +1 @@\n" is the shortest).
1583 nextlen = linelen(line + len, size - len);
1584 if (size < nextlen + 14 || memcmp("@@ -", line + len + nextlen, 4))
1587 /* Ok, we'll consider it a patch */
1588 if (parse_traditional_patch(state, line, line+len, patch))
1590 *hdrsize = len + nextlen;
1597 static void record_ws_error(struct apply_state *state,
1608 state->whitespace_error++;
1609 if (state->squelch_whitespace_errors &&
1610 state->squelch_whitespace_errors < state->whitespace_error)
1613 err = whitespace_error_string(result);
1614 if (state->apply_verbosity > verbosity_silent)
1615 fprintf(stderr, "%s:%d: %s.\n%.*s\n",
1616 state->patch_input_file, linenr, err, len, line);
1620 static void check_whitespace(struct apply_state *state,
1625 unsigned result = ws_check(line + 1, len - 1, ws_rule);
1627 record_ws_error(state, result, line + 1, len - 2, state->linenr);
1631 * Check if the patch has context lines with CRLF or
1632 * the patch wants to remove lines with CRLF.
1634 static void check_old_for_crlf(struct patch *patch, const char *line, int len)
1636 if (len >= 2 && line[len-1] == '\n' && line[len-2] == '\r') {
1637 patch->ws_rule |= WS_CR_AT_EOL;
1638 patch->crlf_in_old = 1;
1644 * Parse a unified diff. Note that this really needs to parse each
1645 * fragment separately, since the only way to know the difference
1646 * between a "---" that is part of a patch, and a "---" that starts
1647 * the next patch is to look at the line counts..
1649 static int parse_fragment(struct apply_state *state,
1652 struct patch *patch,
1653 struct fragment *fragment)
1656 int len = linelen(line, size), offset;
1657 unsigned long oldlines, newlines;
1658 unsigned long leading, trailing;
1660 offset = parse_fragment_header(line, len, fragment);
1663 if (offset > 0 && patch->recount)
1664 recount_diff(line + offset, size - offset, fragment);
1665 oldlines = fragment->oldlines;
1666 newlines = fragment->newlines;
1670 /* Parse the thing.. */
1674 added = deleted = 0;
1677 offset += len, size -= len, line += len, state->linenr++) {
1678 if (!oldlines && !newlines)
1680 len = linelen(line, size);
1681 if (!len || line[len-1] != '\n')
1686 case '\n': /* newer GNU diff, an empty context line */
1690 if (!deleted && !added)
1693 check_old_for_crlf(patch, line, len);
1694 if (!state->apply_in_reverse &&
1695 state->ws_error_action == correct_ws_error)
1696 check_whitespace(state, line, len, patch->ws_rule);
1699 if (!state->apply_in_reverse)
1700 check_old_for_crlf(patch, line, len);
1701 if (state->apply_in_reverse &&
1702 state->ws_error_action != nowarn_ws_error)
1703 check_whitespace(state, line, len, patch->ws_rule);
1709 if (state->apply_in_reverse)
1710 check_old_for_crlf(patch, line, len);
1711 if (!state->apply_in_reverse &&
1712 state->ws_error_action != nowarn_ws_error)
1713 check_whitespace(state, line, len, patch->ws_rule);
1720 * We allow "\ No newline at end of file". Depending
1721 * on locale settings when the patch was produced we
1722 * don't know what this line looks like. The only
1723 * thing we do know is that it begins with "\ ".
1724 * Checking for 12 is just for sanity check -- any
1725 * l10n of "\ No newline..." is at least that long.
1728 if (len < 12 || memcmp(line, "\\ ", 2))
1733 if (oldlines || newlines)
1735 if (!patch->recount && !deleted && !added)
1738 fragment->leading = leading;
1739 fragment->trailing = trailing;
1742 * If a fragment ends with an incomplete line, we failed to include
1743 * it in the above loop because we hit oldlines == newlines == 0
1746 if (12 < size && !memcmp(line, "\\ ", 2))
1747 offset += linelen(line, size);
1749 patch->lines_added += added;
1750 patch->lines_deleted += deleted;
1752 if (0 < patch->is_new && oldlines)
1753 return error(_("new file depends on old contents"));
1754 if (0 < patch->is_delete && newlines)
1755 return error(_("deleted file still has contents"));
1760 * We have seen "diff --git a/... b/..." header (or a traditional patch
1761 * header). Read hunks that belong to this patch into fragments and hang
1762 * them to the given patch structure.
1764 * The (fragment->patch, fragment->size) pair points into the memory given
1765 * by the caller, not a copy, when we return.
1768 * -1 in case of error,
1769 * the number of bytes in the patch otherwise.
1771 static int parse_single_patch(struct apply_state *state,
1774 struct patch *patch)
1776 unsigned long offset = 0;
1777 unsigned long oldlines = 0, newlines = 0, context = 0;
1778 struct fragment **fragp = &patch->fragments;
1780 while (size > 4 && !memcmp(line, "@@ -", 4)) {
1781 struct fragment *fragment;
1784 fragment = xcalloc(1, sizeof(*fragment));
1785 fragment->linenr = state->linenr;
1786 len = parse_fragment(state, line, size, patch, fragment);
1789 return error(_("corrupt patch at line %d"), state->linenr);
1791 fragment->patch = line;
1792 fragment->size = len;
1793 oldlines += fragment->oldlines;
1794 newlines += fragment->newlines;
1795 context += fragment->leading + fragment->trailing;
1798 fragp = &fragment->next;
1806 * If something was removed (i.e. we have old-lines) it cannot
1807 * be creation, and if something was added it cannot be
1808 * deletion. However, the reverse is not true; --unified=0
1809 * patches that only add are not necessarily creation even
1810 * though they do not have any old lines, and ones that only
1811 * delete are not necessarily deletion.
1813 * Unfortunately, a real creation/deletion patch do _not_ have
1814 * any context line by definition, so we cannot safely tell it
1815 * apart with --unified=0 insanity. At least if the patch has
1816 * more than one hunk it is not creation or deletion.
1818 if (patch->is_new < 0 &&
1819 (oldlines || (patch->fragments && patch->fragments->next)))
1821 if (patch->is_delete < 0 &&
1822 (newlines || (patch->fragments && patch->fragments->next)))
1823 patch->is_delete = 0;
1825 if (0 < patch->is_new && oldlines)
1826 return error(_("new file %s depends on old contents"), patch->new_name);
1827 if (0 < patch->is_delete && newlines)
1828 return error(_("deleted file %s still has contents"), patch->old_name);
1829 if (!patch->is_delete && !newlines && context && state->apply_verbosity > verbosity_silent)
1832 "file %s becomes empty but is not deleted"),
1838 static inline int metadata_changes(struct patch *patch)
1840 return patch->is_rename > 0 ||
1841 patch->is_copy > 0 ||
1842 patch->is_new > 0 ||
1844 (patch->old_mode && patch->new_mode &&
1845 patch->old_mode != patch->new_mode);
1848 static char *inflate_it(const void *data, unsigned long size,
1849 unsigned long inflated_size)
1855 memset(&stream, 0, sizeof(stream));
1857 stream.next_in = (unsigned char *)data;
1858 stream.avail_in = size;
1859 stream.next_out = out = xmalloc(inflated_size);
1860 stream.avail_out = inflated_size;
1861 git_inflate_init(&stream);
1862 st = git_inflate(&stream, Z_FINISH);
1863 git_inflate_end(&stream);
1864 if ((st != Z_STREAM_END) || stream.total_out != inflated_size) {
1872 * Read a binary hunk and return a new fragment; fragment->patch
1873 * points at an allocated memory that the caller must free, so
1874 * it is marked as "->free_patch = 1".
1876 static struct fragment *parse_binary_hunk(struct apply_state *state,
1878 unsigned long *sz_p,
1883 * Expect a line that begins with binary patch method ("literal"
1884 * or "delta"), followed by the length of data before deflating.
1885 * a sequence of 'length-byte' followed by base-85 encoded data
1886 * should follow, terminated by a newline.
1888 * Each 5-byte sequence of base-85 encodes up to 4 bytes,
1889 * and we would limit the patch line to 66 characters,
1890 * so one line can fit up to 13 groups that would decode
1891 * to 52 bytes max. The length byte 'A'-'Z' corresponds
1892 * to 1-26 bytes, and 'a'-'z' corresponds to 27-52 bytes.
1895 unsigned long size = *sz_p;
1896 char *buffer = *buf_p;
1898 unsigned long origlen;
1901 struct fragment *frag;
1903 llen = linelen(buffer, size);
1908 if (starts_with(buffer, "delta ")) {
1909 patch_method = BINARY_DELTA_DEFLATED;
1910 origlen = strtoul(buffer + 6, NULL, 10);
1912 else if (starts_with(buffer, "literal ")) {
1913 patch_method = BINARY_LITERAL_DEFLATED;
1914 origlen = strtoul(buffer + 8, NULL, 10);
1922 int byte_length, max_byte_length, newsize;
1923 llen = linelen(buffer, size);
1927 /* consume the blank line */
1933 * Minimum line is "A00000\n" which is 7-byte long,
1934 * and the line length must be multiple of 5 plus 2.
1936 if ((llen < 7) || (llen-2) % 5)
1938 max_byte_length = (llen - 2) / 5 * 4;
1939 byte_length = *buffer;
1940 if ('A' <= byte_length && byte_length <= 'Z')
1941 byte_length = byte_length - 'A' + 1;
1942 else if ('a' <= byte_length && byte_length <= 'z')
1943 byte_length = byte_length - 'a' + 27;
1946 /* if the input length was not multiple of 4, we would
1947 * have filler at the end but the filler should never
1950 if (max_byte_length < byte_length ||
1951 byte_length <= max_byte_length - 4)
1953 newsize = hunk_size + byte_length;
1954 data = xrealloc(data, newsize);
1955 if (decode_85(data + hunk_size, buffer + 1, byte_length))
1957 hunk_size = newsize;
1962 frag = xcalloc(1, sizeof(*frag));
1963 frag->patch = inflate_it(data, hunk_size, origlen);
1964 frag->free_patch = 1;
1968 frag->size = origlen;
1972 frag->binary_patch_method = patch_method;
1978 error(_("corrupt binary patch at line %d: %.*s"),
1979 state->linenr-1, llen-1, buffer);
1985 * -1 in case of error,
1986 * the length of the parsed binary patch otherwise
1988 static int parse_binary(struct apply_state *state,
1991 struct patch *patch)
1994 * We have read "GIT binary patch\n"; what follows is a line
1995 * that says the patch method (currently, either "literal" or
1996 * "delta") and the length of data before deflating; a
1997 * sequence of 'length-byte' followed by base-85 encoded data
2000 * When a binary patch is reversible, there is another binary
2001 * hunk in the same format, starting with patch method (either
2002 * "literal" or "delta") with the length of data, and a sequence
2003 * of length-byte + base-85 encoded data, terminated with another
2004 * empty line. This data, when applied to the postimage, produces
2007 struct fragment *forward;
2008 struct fragment *reverse;
2012 forward = parse_binary_hunk(state, &buffer, &size, &status, &used);
2013 if (!forward && !status)
2014 /* there has to be one hunk (forward hunk) */
2015 return error(_("unrecognized binary patch at line %d"), state->linenr-1);
2017 /* otherwise we already gave an error message */
2020 reverse = parse_binary_hunk(state, &buffer, &size, &status, &used_1);
2025 * Not having reverse hunk is not an error, but having
2026 * a corrupt reverse hunk is.
2028 free((void*) forward->patch);
2032 forward->next = reverse;
2033 patch->fragments = forward;
2034 patch->is_binary = 1;
2038 static void prefix_one(struct apply_state *state, char **name)
2040 char *old_name = *name;
2043 *name = prefix_filename(state->prefix, *name);
2047 static void prefix_patch(struct apply_state *state, struct patch *p)
2049 if (!state->prefix || p->is_toplevel_relative)
2051 prefix_one(state, &p->new_name);
2052 prefix_one(state, &p->old_name);
2059 static void add_name_limit(struct apply_state *state,
2063 struct string_list_item *it;
2065 it = string_list_append(&state->limit_by_name, name);
2066 it->util = exclude ? NULL : (void *) 1;
2069 static int use_patch(struct apply_state *state, struct patch *p)
2071 const char *pathname = p->new_name ? p->new_name : p->old_name;
2074 /* Paths outside are not touched regardless of "--include" */
2075 if (state->prefix && *state->prefix) {
2077 if (!skip_prefix(pathname, state->prefix, &rest) || !*rest)
2081 /* See if it matches any of exclude/include rule */
2082 for (i = 0; i < state->limit_by_name.nr; i++) {
2083 struct string_list_item *it = &state->limit_by_name.items[i];
2084 if (!wildmatch(it->string, pathname, 0))
2085 return (it->util != NULL);
2089 * If we had any include, a path that does not match any rule is
2090 * not used. Otherwise, we saw bunch of exclude rules (or none)
2091 * and such a path is used.
2093 return !state->has_include;
2097 * Read the patch text in "buffer" that extends for "size" bytes; stop
2098 * reading after seeing a single patch (i.e. changes to a single file).
2099 * Create fragments (i.e. patch hunks) and hang them to the given patch.
2102 * -1 if no header was found or parse_binary() failed,
2103 * -128 on another error,
2104 * the number of bytes consumed otherwise,
2105 * so that the caller can call us again for the next patch.
2107 static int parse_chunk(struct apply_state *state, char *buffer, unsigned long size, struct patch *patch)
2109 int hdrsize, patchsize;
2110 int offset = find_header(state, buffer, size, &hdrsize, patch);
2115 prefix_patch(state, patch);
2117 if (!use_patch(state, patch))
2119 else if (patch->new_name)
2120 patch->ws_rule = whitespace_rule(state->repo->index,
2123 patch->ws_rule = whitespace_rule(state->repo->index,
2126 patchsize = parse_single_patch(state,
2127 buffer + offset + hdrsize,
2128 size - offset - hdrsize,
2135 static const char git_binary[] = "GIT binary patch\n";
2136 int hd = hdrsize + offset;
2137 unsigned long llen = linelen(buffer + hd, size - hd);
2139 if (llen == sizeof(git_binary) - 1 &&
2140 !memcmp(git_binary, buffer + hd, llen)) {
2143 used = parse_binary(state, buffer + hd + llen,
2144 size - hd - llen, patch);
2148 patchsize = used + llen;
2152 else if (!memcmp(" differ\n", buffer + hd + llen - 8, 8)) {
2153 static const char *binhdr[] = {
2159 for (i = 0; binhdr[i]; i++) {
2160 int len = strlen(binhdr[i]);
2161 if (len < size - hd &&
2162 !memcmp(binhdr[i], buffer + hd, len)) {
2164 patch->is_binary = 1;
2171 /* Empty patch cannot be applied if it is a text patch
2172 * without metadata change. A binary patch appears
2175 if ((state->apply || state->check) &&
2176 (!patch->is_binary && !metadata_changes(patch))) {
2177 error(_("patch with only garbage at line %d"), state->linenr);
2182 return offset + hdrsize + patchsize;
2185 static void reverse_patches(struct patch *p)
2187 for (; p; p = p->next) {
2188 struct fragment *frag = p->fragments;
2190 SWAP(p->new_name, p->old_name);
2191 SWAP(p->new_mode, p->old_mode);
2192 SWAP(p->is_new, p->is_delete);
2193 SWAP(p->lines_added, p->lines_deleted);
2194 SWAP(p->old_oid_prefix, p->new_oid_prefix);
2196 for (; frag; frag = frag->next) {
2197 SWAP(frag->newpos, frag->oldpos);
2198 SWAP(frag->newlines, frag->oldlines);
2203 static const char pluses[] =
2204 "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++";
2205 static const char minuses[]=
2206 "----------------------------------------------------------------------";
2208 static void show_stats(struct apply_state *state, struct patch *patch)
2210 struct strbuf qname = STRBUF_INIT;
2211 char *cp = patch->new_name ? patch->new_name : patch->old_name;
2214 quote_c_style(cp, &qname, NULL, 0);
2217 * "scale" the filename
2219 max = state->max_len;
2223 if (qname.len > max) {
2224 cp = strchr(qname.buf + qname.len + 3 - max, '/');
2226 cp = qname.buf + qname.len + 3 - max;
2227 strbuf_splice(&qname, 0, cp - qname.buf, "...", 3);
2230 if (patch->is_binary) {
2231 printf(" %-*s | Bin\n", max, qname.buf);
2232 strbuf_release(&qname);
2236 printf(" %-*s |", max, qname.buf);
2237 strbuf_release(&qname);
2240 * scale the add/delete
2242 max = max + state->max_change > 70 ? 70 - max : state->max_change;
2243 add = patch->lines_added;
2244 del = patch->lines_deleted;
2246 if (state->max_change > 0) {
2247 int total = ((add + del) * max + state->max_change / 2) / state->max_change;
2248 add = (add * max + state->max_change / 2) / state->max_change;
2251 printf("%5d %.*s%.*s\n", patch->lines_added + patch->lines_deleted,
2252 add, pluses, del, minuses);
2255 static int read_old_data(struct stat *st, struct patch *patch,
2256 const char *path, struct strbuf *buf)
2258 int conv_flags = patch->crlf_in_old ?
2259 CONV_EOL_KEEP_CRLF : CONV_EOL_RENORMALIZE;
2260 switch (st->st_mode & S_IFMT) {
2262 if (strbuf_readlink(buf, path, st->st_size) < 0)
2263 return error(_("unable to read symlink %s"), path);
2266 if (strbuf_read_file(buf, path, st->st_size) != st->st_size)
2267 return error(_("unable to open or read %s"), path);
2269 * "git apply" without "--index/--cached" should never look
2270 * at the index; the target file may not have been added to
2271 * the index yet, and we may not even be in any Git repository.
2272 * Pass NULL to convert_to_git() to stress this; the function
2273 * should never look at the index when explicit crlf option
2276 convert_to_git(NULL, path, buf->buf, buf->len, buf, conv_flags);
2284 * Update the preimage, and the common lines in postimage,
2285 * from buffer buf of length len. If postlen is 0 the postimage
2286 * is updated in place, otherwise it's updated on a new buffer
2290 static void update_pre_post_images(struct image *preimage,
2291 struct image *postimage,
2293 size_t len, size_t postlen)
2295 int i, ctx, reduced;
2296 char *new_buf, *old_buf, *fixed;
2297 struct image fixed_preimage;
2300 * Update the preimage with whitespace fixes. Note that we
2301 * are not losing preimage->buf -- apply_one_fragment() will
2304 prepare_image(&fixed_preimage, buf, len, 1);
2306 ? fixed_preimage.nr == preimage->nr
2307 : fixed_preimage.nr <= preimage->nr);
2308 for (i = 0; i < fixed_preimage.nr; i++)
2309 fixed_preimage.line[i].flag = preimage->line[i].flag;
2310 free(preimage->line_allocated);
2311 *preimage = fixed_preimage;
2314 * Adjust the common context lines in postimage. This can be
2315 * done in-place when we are shrinking it with whitespace
2316 * fixing, but needs a new buffer when ignoring whitespace or
2317 * expanding leading tabs to spaces.
2319 * We trust the caller to tell us if the update can be done
2320 * in place (postlen==0) or not.
2322 old_buf = postimage->buf;
2324 new_buf = postimage->buf = xmalloc(postlen);
2327 fixed = preimage->buf;
2329 for (i = reduced = ctx = 0; i < postimage->nr; i++) {
2330 size_t l_len = postimage->line[i].len;
2331 if (!(postimage->line[i].flag & LINE_COMMON)) {
2332 /* an added line -- no counterparts in preimage */
2333 memmove(new_buf, old_buf, l_len);
2339 /* a common context -- skip it in the original postimage */
2342 /* and find the corresponding one in the fixed preimage */
2343 while (ctx < preimage->nr &&
2344 !(preimage->line[ctx].flag & LINE_COMMON)) {
2345 fixed += preimage->line[ctx].len;
2350 * preimage is expected to run out, if the caller
2351 * fixed addition of trailing blank lines.
2353 if (preimage->nr <= ctx) {
2358 /* and copy it in, while fixing the line length */
2359 l_len = preimage->line[ctx].len;
2360 memcpy(new_buf, fixed, l_len);
2363 postimage->line[i].len = l_len;
2368 ? postlen < new_buf - postimage->buf
2369 : postimage->len < new_buf - postimage->buf)
2370 BUG("caller miscounted postlen: asked %d, orig = %d, used = %d",
2371 (int)postlen, (int) postimage->len, (int)(new_buf - postimage->buf));
2373 /* Fix the length of the whole thing */
2374 postimage->len = new_buf - postimage->buf;
2375 postimage->nr -= reduced;
2378 static int line_by_line_fuzzy_match(struct image *img,
2379 struct image *preimage,
2380 struct image *postimage,
2381 unsigned long current,
2388 size_t postlen = postimage->len;
2393 struct strbuf fixed;
2397 for (i = 0; i < preimage_limit; i++) {
2398 size_t prelen = preimage->line[i].len;
2399 size_t imglen = img->line[current_lno+i].len;
2401 if (!fuzzy_matchlines(img->buf + current + imgoff, imglen,
2402 preimage->buf + preoff, prelen))
2404 if (preimage->line[i].flag & LINE_COMMON)
2405 postlen += imglen - prelen;
2411 * Ok, the preimage matches with whitespace fuzz.
2413 * imgoff now holds the true length of the target that
2414 * matches the preimage before the end of the file.
2416 * Count the number of characters in the preimage that fall
2417 * beyond the end of the file and make sure that all of them
2418 * are whitespace characters. (This can only happen if
2419 * we are removing blank lines at the end of the file.)
2421 buf = preimage_eof = preimage->buf + preoff;
2422 for ( ; i < preimage->nr; i++)
2423 preoff += preimage->line[i].len;
2424 preimage_end = preimage->buf + preoff;
2425 for ( ; buf < preimage_end; buf++)
2430 * Update the preimage and the common postimage context
2431 * lines to use the same whitespace as the target.
2432 * If whitespace is missing in the target (i.e.
2433 * if the preimage extends beyond the end of the file),
2434 * use the whitespace from the preimage.
2436 extra_chars = preimage_end - preimage_eof;
2437 strbuf_init(&fixed, imgoff + extra_chars);
2438 strbuf_add(&fixed, img->buf + current, imgoff);
2439 strbuf_add(&fixed, preimage_eof, extra_chars);
2440 fixed_buf = strbuf_detach(&fixed, &fixed_len);
2441 update_pre_post_images(preimage, postimage,
2442 fixed_buf, fixed_len, postlen);
2446 static int match_fragment(struct apply_state *state,
2448 struct image *preimage,
2449 struct image *postimage,
2450 unsigned long current,
2453 int match_beginning, int match_end)
2456 char *fixed_buf, *buf, *orig, *target;
2457 struct strbuf fixed;
2458 size_t fixed_len, postlen;
2461 if (preimage->nr + current_lno <= img->nr) {
2463 * The hunk falls within the boundaries of img.
2465 preimage_limit = preimage->nr;
2466 if (match_end && (preimage->nr + current_lno != img->nr))
2468 } else if (state->ws_error_action == correct_ws_error &&
2469 (ws_rule & WS_BLANK_AT_EOF)) {
2471 * This hunk extends beyond the end of img, and we are
2472 * removing blank lines at the end of the file. This
2473 * many lines from the beginning of the preimage must
2474 * match with img, and the remainder of the preimage
2477 preimage_limit = img->nr - current_lno;
2480 * The hunk extends beyond the end of the img and
2481 * we are not removing blanks at the end, so we
2482 * should reject the hunk at this position.
2487 if (match_beginning && current_lno)
2490 /* Quick hash check */
2491 for (i = 0; i < preimage_limit; i++)
2492 if ((img->line[current_lno + i].flag & LINE_PATCHED) ||
2493 (preimage->line[i].hash != img->line[current_lno + i].hash))
2496 if (preimage_limit == preimage->nr) {
2498 * Do we have an exact match? If we were told to match
2499 * at the end, size must be exactly at current+fragsize,
2500 * otherwise current+fragsize must be still within the preimage,
2501 * and either case, the old piece should match the preimage
2505 ? (current + preimage->len == img->len)
2506 : (current + preimage->len <= img->len)) &&
2507 !memcmp(img->buf + current, preimage->buf, preimage->len))
2511 * The preimage extends beyond the end of img, so
2512 * there cannot be an exact match.
2514 * There must be one non-blank context line that match
2515 * a line before the end of img.
2519 buf = preimage->buf;
2521 for (i = 0; i < preimage_limit; i++)
2522 buf_end += preimage->line[i].len;
2524 for ( ; buf < buf_end; buf++)
2532 * No exact match. If we are ignoring whitespace, run a line-by-line
2533 * fuzzy matching. We collect all the line length information because
2534 * we need it to adjust whitespace if we match.
2536 if (state->ws_ignore_action == ignore_ws_change)
2537 return line_by_line_fuzzy_match(img, preimage, postimage,
2538 current, current_lno, preimage_limit);
2540 if (state->ws_error_action != correct_ws_error)
2544 * The hunk does not apply byte-by-byte, but the hash says
2545 * it might with whitespace fuzz. We weren't asked to
2546 * ignore whitespace, we were asked to correct whitespace
2547 * errors, so let's try matching after whitespace correction.
2549 * While checking the preimage against the target, whitespace
2550 * errors in both fixed, we count how large the corresponding
2551 * postimage needs to be. The postimage prepared by
2552 * apply_one_fragment() has whitespace errors fixed on added
2553 * lines already, but the common lines were propagated as-is,
2554 * which may become longer when their whitespace errors are
2558 /* First count added lines in postimage */
2560 for (i = 0; i < postimage->nr; i++) {
2561 if (!(postimage->line[i].flag & LINE_COMMON))
2562 postlen += postimage->line[i].len;
2566 * The preimage may extend beyond the end of the file,
2567 * but in this loop we will only handle the part of the
2568 * preimage that falls within the file.
2570 strbuf_init(&fixed, preimage->len + 1);
2571 orig = preimage->buf;
2572 target = img->buf + current;
2573 for (i = 0; i < preimage_limit; i++) {
2574 size_t oldlen = preimage->line[i].len;
2575 size_t tgtlen = img->line[current_lno + i].len;
2576 size_t fixstart = fixed.len;
2577 struct strbuf tgtfix;
2580 /* Try fixing the line in the preimage */
2581 ws_fix_copy(&fixed, orig, oldlen, ws_rule, NULL);
2583 /* Try fixing the line in the target */
2584 strbuf_init(&tgtfix, tgtlen);
2585 ws_fix_copy(&tgtfix, target, tgtlen, ws_rule, NULL);
2588 * If they match, either the preimage was based on
2589 * a version before our tree fixed whitespace breakage,
2590 * or we are lacking a whitespace-fix patch the tree
2591 * the preimage was based on already had (i.e. target
2592 * has whitespace breakage, the preimage doesn't).
2593 * In either case, we are fixing the whitespace breakages
2594 * so we might as well take the fix together with their
2597 match = (tgtfix.len == fixed.len - fixstart &&
2598 !memcmp(tgtfix.buf, fixed.buf + fixstart,
2599 fixed.len - fixstart));
2601 /* Add the length if this is common with the postimage */
2602 if (preimage->line[i].flag & LINE_COMMON)
2603 postlen += tgtfix.len;
2605 strbuf_release(&tgtfix);
2615 * Now handle the lines in the preimage that falls beyond the
2616 * end of the file (if any). They will only match if they are
2617 * empty or only contain whitespace (if WS_BLANK_AT_EOL is
2620 for ( ; i < preimage->nr; i++) {
2621 size_t fixstart = fixed.len; /* start of the fixed preimage */
2622 size_t oldlen = preimage->line[i].len;
2625 /* Try fixing the line in the preimage */
2626 ws_fix_copy(&fixed, orig, oldlen, ws_rule, NULL);
2628 for (j = fixstart; j < fixed.len; j++)
2629 if (!isspace(fixed.buf[j]))
2636 * Yes, the preimage is based on an older version that still
2637 * has whitespace breakages unfixed, and fixing them makes the
2638 * hunk match. Update the context lines in the postimage.
2640 fixed_buf = strbuf_detach(&fixed, &fixed_len);
2641 if (postlen < postimage->len)
2643 update_pre_post_images(preimage, postimage,
2644 fixed_buf, fixed_len, postlen);
2648 strbuf_release(&fixed);
2652 static int find_pos(struct apply_state *state,
2654 struct image *preimage,
2655 struct image *postimage,
2658 int match_beginning, int match_end)
2661 unsigned long backwards, forwards, current;
2662 int backwards_lno, forwards_lno, current_lno;
2665 * When running with --allow-overlap, it is possible that a hunk is
2666 * seen that pretends to start at the beginning (but no longer does),
2667 * and that *still* needs to match the end. So trust `match_end` more
2668 * than `match_beginning`.
2670 if (state->allow_overlap && match_beginning && match_end &&
2671 img->nr - preimage->nr != 0)
2672 match_beginning = 0;
2675 * If match_beginning or match_end is specified, there is no
2676 * point starting from a wrong line that will never match and
2677 * wander around and wait for a match at the specified end.
2679 if (match_beginning)
2682 line = img->nr - preimage->nr;
2685 * Because the comparison is unsigned, the following test
2686 * will also take care of a negative line number that can
2687 * result when match_end and preimage is larger than the target.
2689 if ((size_t) line > img->nr)
2693 for (i = 0; i < line; i++)
2694 current += img->line[i].len;
2697 * There's probably some smart way to do this, but I'll leave
2698 * that to the smart and beautiful people. I'm simple and stupid.
2700 backwards = current;
2701 backwards_lno = line;
2703 forwards_lno = line;
2706 for (i = 0; ; i++) {
2707 if (match_fragment(state, img, preimage, postimage,
2708 current, current_lno, ws_rule,
2709 match_beginning, match_end))
2713 if (backwards_lno == 0 && forwards_lno == img->nr)
2717 if (backwards_lno == 0) {
2722 backwards -= img->line[backwards_lno].len;
2723 current = backwards;
2724 current_lno = backwards_lno;
2726 if (forwards_lno == img->nr) {
2730 forwards += img->line[forwards_lno].len;
2733 current_lno = forwards_lno;
2740 static void remove_first_line(struct image *img)
2742 img->buf += img->line[0].len;
2743 img->len -= img->line[0].len;
2748 static void remove_last_line(struct image *img)
2750 img->len -= img->line[--img->nr].len;
2754 * The change from "preimage" and "postimage" has been found to
2755 * apply at applied_pos (counts in line numbers) in "img".
2756 * Update "img" to remove "preimage" and replace it with "postimage".
2758 static void update_image(struct apply_state *state,
2761 struct image *preimage,
2762 struct image *postimage)
2765 * remove the copy of preimage at offset in img
2766 * and replace it with postimage
2769 size_t remove_count, insert_count, applied_at = 0;
2774 * If we are removing blank lines at the end of img,
2775 * the preimage may extend beyond the end.
2776 * If that is the case, we must be careful only to
2777 * remove the part of the preimage that falls within
2778 * the boundaries of img. Initialize preimage_limit
2779 * to the number of lines in the preimage that falls
2780 * within the boundaries.
2782 preimage_limit = preimage->nr;
2783 if (preimage_limit > img->nr - applied_pos)
2784 preimage_limit = img->nr - applied_pos;
2786 for (i = 0; i < applied_pos; i++)
2787 applied_at += img->line[i].len;
2790 for (i = 0; i < preimage_limit; i++)
2791 remove_count += img->line[applied_pos + i].len;
2792 insert_count = postimage->len;
2794 /* Adjust the contents */
2795 result = xmalloc(st_add3(st_sub(img->len, remove_count), insert_count, 1));
2796 memcpy(result, img->buf, applied_at);
2797 memcpy(result + applied_at, postimage->buf, postimage->len);
2798 memcpy(result + applied_at + postimage->len,
2799 img->buf + (applied_at + remove_count),
2800 img->len - (applied_at + remove_count));
2803 img->len += insert_count - remove_count;
2804 result[img->len] = '\0';
2806 /* Adjust the line table */
2807 nr = img->nr + postimage->nr - preimage_limit;
2808 if (preimage_limit < postimage->nr) {
2810 * NOTE: this knows that we never call remove_first_line()
2811 * on anything other than pre/post image.
2813 REALLOC_ARRAY(img->line, nr);
2814 img->line_allocated = img->line;
2816 if (preimage_limit != postimage->nr)
2817 MOVE_ARRAY(img->line + applied_pos + postimage->nr,
2818 img->line + applied_pos + preimage_limit,
2819 img->nr - (applied_pos + preimage_limit));
2820 COPY_ARRAY(img->line + applied_pos, postimage->line, postimage->nr);
2821 if (!state->allow_overlap)
2822 for (i = 0; i < postimage->nr; i++)
2823 img->line[applied_pos + i].flag |= LINE_PATCHED;
2828 * Use the patch-hunk text in "frag" to prepare two images (preimage and
2829 * postimage) for the hunk. Find lines that match "preimage" in "img" and
2830 * replace the part of "img" with "postimage" text.
2832 static int apply_one_fragment(struct apply_state *state,
2833 struct image *img, struct fragment *frag,
2834 int inaccurate_eof, unsigned ws_rule,
2837 int match_beginning, match_end;
2838 const char *patch = frag->patch;
2839 int size = frag->size;
2840 char *old, *oldlines;
2841 struct strbuf newlines;
2842 int new_blank_lines_at_end = 0;
2843 int found_new_blank_lines_at_end = 0;
2844 int hunk_linenr = frag->linenr;
2845 unsigned long leading, trailing;
2846 int pos, applied_pos;
2847 struct image preimage;
2848 struct image postimage;
2850 memset(&preimage, 0, sizeof(preimage));
2851 memset(&postimage, 0, sizeof(postimage));
2852 oldlines = xmalloc(size);
2853 strbuf_init(&newlines, size);
2858 int len = linelen(patch, size);
2860 int added_blank_line = 0;
2861 int is_blank_context = 0;
2868 * "plen" is how much of the line we should use for
2869 * the actual patch data. Normally we just remove the
2870 * first character on the line, but if the line is
2871 * followed by "\ No newline", then we also remove the
2872 * last one (which is the newline, of course).
2875 if (len < size && patch[len] == '\\')
2878 if (state->apply_in_reverse) {
2881 else if (first == '+')
2887 /* Newer GNU diff, empty context line */
2889 /* ... followed by '\No newline'; nothing */
2892 strbuf_addch(&newlines, '\n');
2893 add_line_info(&preimage, "\n", 1, LINE_COMMON);
2894 add_line_info(&postimage, "\n", 1, LINE_COMMON);
2895 is_blank_context = 1;
2898 if (plen && (ws_rule & WS_BLANK_AT_EOF) &&
2899 ws_blank_line(patch + 1, plen, ws_rule))
2900 is_blank_context = 1;
2903 memcpy(old, patch + 1, plen);
2904 add_line_info(&preimage, old, plen,
2905 (first == ' ' ? LINE_COMMON : 0));
2911 /* --no-add does not add new lines */
2912 if (first == '+' && state->no_add)
2915 start = newlines.len;
2917 !state->whitespace_error ||
2918 state->ws_error_action != correct_ws_error) {
2919 strbuf_add(&newlines, patch + 1, plen);
2922 ws_fix_copy(&newlines, patch + 1, plen, ws_rule, &state->applied_after_fixing_ws);
2924 add_line_info(&postimage, newlines.buf + start, newlines.len - start,
2925 (first == '+' ? 0 : LINE_COMMON));
2927 (ws_rule & WS_BLANK_AT_EOF) &&
2928 ws_blank_line(patch + 1, plen, ws_rule))
2929 added_blank_line = 1;
2931 case '@': case '\\':
2932 /* Ignore it, we already handled it */
2935 if (state->apply_verbosity > verbosity_normal)
2936 error(_("invalid start of line: '%c'"), first);
2940 if (added_blank_line) {
2941 if (!new_blank_lines_at_end)
2942 found_new_blank_lines_at_end = hunk_linenr;
2943 new_blank_lines_at_end++;
2945 else if (is_blank_context)
2948 new_blank_lines_at_end = 0;
2953 if (inaccurate_eof &&
2954 old > oldlines && old[-1] == '\n' &&
2955 newlines.len > 0 && newlines.buf[newlines.len - 1] == '\n') {
2957 strbuf_setlen(&newlines, newlines.len - 1);
2958 preimage.line_allocated[preimage.nr - 1].len--;
2959 postimage.line_allocated[postimage.nr - 1].len--;
2962 leading = frag->leading;
2963 trailing = frag->trailing;
2966 * A hunk to change lines at the beginning would begin with
2968 * but we need to be careful. -U0 that inserts before the second
2969 * line also has this pattern.
2971 * And a hunk to add to an empty file would begin with
2974 * In other words, a hunk that is (frag->oldpos <= 1) with or
2975 * without leading context must match at the beginning.
2977 match_beginning = (!frag->oldpos ||
2978 (frag->oldpos == 1 && !state->unidiff_zero));
2981 * A hunk without trailing lines must match at the end.
2982 * However, we simply cannot tell if a hunk must match end
2983 * from the lack of trailing lines if the patch was generated
2984 * with unidiff without any context.
2986 match_end = !state->unidiff_zero && !trailing;
2988 pos = frag->newpos ? (frag->newpos - 1) : 0;
2989 preimage.buf = oldlines;
2990 preimage.len = old - oldlines;
2991 postimage.buf = newlines.buf;
2992 postimage.len = newlines.len;
2993 preimage.line = preimage.line_allocated;
2994 postimage.line = postimage.line_allocated;
2998 applied_pos = find_pos(state, img, &preimage, &postimage, pos,
2999 ws_rule, match_beginning, match_end);
3001 if (applied_pos >= 0)
3004 /* Am I at my context limits? */
3005 if ((leading <= state->p_context) && (trailing <= state->p_context))
3007 if (match_beginning || match_end) {
3008 match_beginning = match_end = 0;
3013 * Reduce the number of context lines; reduce both
3014 * leading and trailing if they are equal otherwise
3015 * just reduce the larger context.
3017 if (leading >= trailing) {
3018 remove_first_line(&preimage);
3019 remove_first_line(&postimage);
3023 if (trailing > leading) {
3024 remove_last_line(&preimage);
3025 remove_last_line(&postimage);
3030 if (applied_pos >= 0) {
3031 if (new_blank_lines_at_end &&
3032 preimage.nr + applied_pos >= img->nr &&
3033 (ws_rule & WS_BLANK_AT_EOF) &&
3034 state->ws_error_action != nowarn_ws_error) {
3035 record_ws_error(state, WS_BLANK_AT_EOF, "+", 1,
3036 found_new_blank_lines_at_end);
3037 if (state->ws_error_action == correct_ws_error) {
3038 while (new_blank_lines_at_end--)
3039 remove_last_line(&postimage);
3042 * We would want to prevent write_out_results()
3043 * from taking place in apply_patch() that follows
3044 * the callchain led us here, which is:
3045 * apply_patch->check_patch_list->check_patch->
3046 * apply_data->apply_fragments->apply_one_fragment
3048 if (state->ws_error_action == die_on_ws_error)
3052 if (state->apply_verbosity > verbosity_normal && applied_pos != pos) {
3053 int offset = applied_pos - pos;
3054 if (state->apply_in_reverse)
3055 offset = 0 - offset;
3057 Q_("Hunk #%d succeeded at %d (offset %d line).",
3058 "Hunk #%d succeeded at %d (offset %d lines).",
3060 nth_fragment, applied_pos + 1, offset);
3064 * Warn if it was necessary to reduce the number
3067 if ((leading != frag->leading ||
3068 trailing != frag->trailing) && state->apply_verbosity > verbosity_silent)
3069 fprintf_ln(stderr, _("Context reduced to (%ld/%ld)"
3070 " to apply fragment at %d"),
3071 leading, trailing, applied_pos+1);
3072 update_image(state, img, applied_pos, &preimage, &postimage);
3074 if (state->apply_verbosity > verbosity_normal)
3075 error(_("while searching for:\n%.*s"),
3076 (int)(old - oldlines), oldlines);
3081 strbuf_release(&newlines);
3082 free(preimage.line_allocated);
3083 free(postimage.line_allocated);
3085 return (applied_pos < 0);
3088 static int apply_binary_fragment(struct apply_state *state,
3090 struct patch *patch)
3092 struct fragment *fragment = patch->fragments;
3097 return error(_("missing binary patch data for '%s'"),
3102 /* Binary patch is irreversible without the optional second hunk */
3103 if (state->apply_in_reverse) {
3104 if (!fragment->next)
3105 return error(_("cannot reverse-apply a binary patch "
3106 "without the reverse hunk to '%s'"),
3108 ? patch->new_name : patch->old_name);
3109 fragment = fragment->next;
3111 switch (fragment->binary_patch_method) {
3112 case BINARY_DELTA_DEFLATED:
3113 dst = patch_delta(img->buf, img->len, fragment->patch,
3114 fragment->size, &len);
3121 case BINARY_LITERAL_DEFLATED:
3123 img->len = fragment->size;
3124 img->buf = xmemdupz(fragment->patch, img->len);
3131 * Replace "img" with the result of applying the binary patch.
3132 * The binary patch data itself in patch->fragment is still kept
3133 * but the preimage prepared by the caller in "img" is freed here
3134 * or in the helper function apply_binary_fragment() this calls.
3136 static int apply_binary(struct apply_state *state,
3138 struct patch *patch)
3140 const char *name = patch->old_name ? patch->old_name : patch->new_name;
3141 struct object_id oid;
3142 const unsigned hexsz = the_hash_algo->hexsz;
3145 * For safety, we require patch index line to contain
3146 * full hex textual object ID for old and new, at least for now.
3148 if (strlen(patch->old_oid_prefix) != hexsz ||
3149 strlen(patch->new_oid_prefix) != hexsz ||
3150 get_oid_hex(patch->old_oid_prefix, &oid) ||
3151 get_oid_hex(patch->new_oid_prefix, &oid))
3152 return error(_("cannot apply binary patch to '%s' "
3153 "without full index line"), name);
3155 if (patch->old_name) {
3157 * See if the old one matches what the patch
3160 hash_object_file(the_hash_algo, img->buf, img->len, blob_type,
3162 if (strcmp(oid_to_hex(&oid), patch->old_oid_prefix))
3163 return error(_("the patch applies to '%s' (%s), "
3164 "which does not match the "
3165 "current contents."),
3166 name, oid_to_hex(&oid));
3169 /* Otherwise, the old one must be empty. */
3171 return error(_("the patch applies to an empty "
3172 "'%s' but it is not empty"), name);
3175 get_oid_hex(patch->new_oid_prefix, &oid);
3176 if (is_null_oid(&oid)) {
3178 return 0; /* deletion patch */
3181 if (has_object(the_repository, &oid, 0)) {
3182 /* We already have the postimage */
3183 enum object_type type;
3187 result = read_object_file(&oid, &type, &size);
3189 return error(_("the necessary postimage %s for "
3190 "'%s' cannot be read"),
3191 patch->new_oid_prefix, name);
3197 * We have verified buf matches the preimage;
3198 * apply the patch data to it, which is stored
3199 * in the patch->fragments->{patch,size}.
3201 if (apply_binary_fragment(state, img, patch))
3202 return error(_("binary patch does not apply to '%s'"),
3205 /* verify that the result matches */
3206 hash_object_file(the_hash_algo, img->buf, img->len, blob_type,
3208 if (strcmp(oid_to_hex(&oid), patch->new_oid_prefix))
3209 return error(_("binary patch to '%s' creates incorrect result (expecting %s, got %s)"),
3210 name, patch->new_oid_prefix, oid_to_hex(&oid));
3216 static int apply_fragments(struct apply_state *state, struct image *img, struct patch *patch)
3218 struct fragment *frag = patch->fragments;
3219 const char *name = patch->old_name ? patch->old_name : patch->new_name;
3220 unsigned ws_rule = patch->ws_rule;
3221 unsigned inaccurate_eof = patch->inaccurate_eof;
3224 if (patch->is_binary)
3225 return apply_binary(state, img, patch);
3229 if (apply_one_fragment(state, img, frag, inaccurate_eof, ws_rule, nth)) {
3230 error(_("patch failed: %s:%ld"), name, frag->oldpos);
3231 if (!state->apply_with_reject)
3240 static int read_blob_object(struct strbuf *buf, const struct object_id *oid, unsigned mode)
3242 if (S_ISGITLINK(mode)) {
3243 strbuf_grow(buf, 100);
3244 strbuf_addf(buf, "Subproject commit %s\n", oid_to_hex(oid));
3246 enum object_type type;
3250 result = read_object_file(oid, &type, &sz);
3253 /* XXX read_sha1_file NUL-terminates */
3254 strbuf_attach(buf, result, sz, sz + 1);
3259 static int read_file_or_gitlink(const struct cache_entry *ce, struct strbuf *buf)
3263 return read_blob_object(buf, &ce->oid, ce->ce_mode);
3266 static struct patch *in_fn_table(struct apply_state *state, const char *name)
3268 struct string_list_item *item;
3273 item = string_list_lookup(&state->fn_table, name);
3275 return (struct patch *)item->util;
3281 * item->util in the filename table records the status of the path.
3282 * Usually it points at a patch (whose result records the contents
3283 * of it after applying it), but it could be PATH_WAS_DELETED for a
3284 * path that a previously applied patch has already removed, or
3285 * PATH_TO_BE_DELETED for a path that a later patch would remove.
3287 * The latter is needed to deal with a case where two paths A and B
3288 * are swapped by first renaming A to B and then renaming B to A;
3289 * moving A to B should not be prevented due to presence of B as we
3290 * will remove it in a later patch.
3292 #define PATH_TO_BE_DELETED ((struct patch *) -2)
3293 #define PATH_WAS_DELETED ((struct patch *) -1)
3295 static int to_be_deleted(struct patch *patch)
3297 return patch == PATH_TO_BE_DELETED;
3300 static int was_deleted(struct patch *patch)
3302 return patch == PATH_WAS_DELETED;
3305 static void add_to_fn_table(struct apply_state *state, struct patch *patch)
3307 struct string_list_item *item;
3310 * Always add new_name unless patch is a deletion
3311 * This should cover the cases for normal diffs,
3312 * file creations and copies
3314 if (patch->new_name != NULL) {
3315 item = string_list_insert(&state->fn_table, patch->new_name);
3320 * store a failure on rename/deletion cases because
3321 * later chunks shouldn't patch old names
3323 if ((patch->new_name == NULL) || (patch->is_rename)) {
3324 item = string_list_insert(&state->fn_table, patch->old_name);
3325 item->util = PATH_WAS_DELETED;
3329 static void prepare_fn_table(struct apply_state *state, struct patch *patch)
3332 * store information about incoming file deletion
3335 if ((patch->new_name == NULL) || (patch->is_rename)) {
3336 struct string_list_item *item;
3337 item = string_list_insert(&state->fn_table, patch->old_name);
3338 item->util = PATH_TO_BE_DELETED;
3340 patch = patch->next;
3344 static int checkout_target(struct index_state *istate,
3345 struct cache_entry *ce, struct stat *st)
3347 struct checkout costate = CHECKOUT_INIT;
3349 costate.refresh_cache = 1;
3350 costate.istate = istate;
3351 if (checkout_entry(ce, &costate, NULL, NULL) ||
3352 lstat(ce->name, st))
3353 return error(_("cannot checkout %s"), ce->name);
3357 static struct patch *previous_patch(struct apply_state *state,
3358 struct patch *patch,
3361 struct patch *previous;
3364 if (patch->is_copy || patch->is_rename)
3365 return NULL; /* "git" patches do not depend on the order */
3367 previous = in_fn_table(state, patch->old_name);
3371 if (to_be_deleted(previous))
3372 return NULL; /* the deletion hasn't happened yet */
3374 if (was_deleted(previous))
3380 static int verify_index_match(struct apply_state *state,
3381 const struct cache_entry *ce,
3384 if (S_ISGITLINK(ce->ce_mode)) {
3385 if (!S_ISDIR(st->st_mode))
3389 return ie_match_stat(state->repo->index, ce, st,
3390 CE_MATCH_IGNORE_VALID | CE_MATCH_IGNORE_SKIP_WORKTREE);
3393 #define SUBMODULE_PATCH_WITHOUT_INDEX 1
3395 static int load_patch_target(struct apply_state *state,
3397 const struct cache_entry *ce,
3399 struct patch *patch,
3401 unsigned expected_mode)
3403 if (state->cached || state->check_index) {
3404 if (read_file_or_gitlink(ce, buf))
3405 return error(_("failed to read %s"), name);
3407 if (S_ISGITLINK(expected_mode)) {
3409 return read_file_or_gitlink(ce, buf);
3411 return SUBMODULE_PATCH_WITHOUT_INDEX;
3412 } else if (has_symlink_leading_path(name, strlen(name))) {
3413 return error(_("reading from '%s' beyond a symbolic link"), name);
3415 if (read_old_data(st, patch, name, buf))
3416 return error(_("failed to read %s"), name);
3423 * We are about to apply "patch"; populate the "image" with the
3424 * current version we have, from the working tree or from the index,
3425 * depending on the situation e.g. --cached/--index. If we are
3426 * applying a non-git patch that incrementally updates the tree,
3427 * we read from the result of a previous diff.
3429 static int load_preimage(struct apply_state *state,
3430 struct image *image,
3431 struct patch *patch, struct stat *st,
3432 const struct cache_entry *ce)
3434 struct strbuf buf = STRBUF_INIT;
3437 struct patch *previous;
3440 previous = previous_patch(state, patch, &status);
3442 return error(_("path %s has been renamed/deleted"),
3445 /* We have a patched copy in memory; use that. */
3446 strbuf_add(&buf, previous->result, previous->resultsize);
3448 status = load_patch_target(state, &buf, ce, st, patch,
3449 patch->old_name, patch->old_mode);
3452 else if (status == SUBMODULE_PATCH_WITHOUT_INDEX) {
3454 * There is no way to apply subproject
3455 * patch without looking at the index.
3456 * NEEDSWORK: shouldn't this be flagged
3459 free_fragment_list(patch->fragments);
3460 patch->fragments = NULL;
3461 } else if (status) {
3462 return error(_("failed to read %s"), patch->old_name);
3466 img = strbuf_detach(&buf, &len);
3467 prepare_image(image, img, len, !patch->is_binary);
3471 static int three_way_merge(struct apply_state *state,
3472 struct image *image,
3474 const struct object_id *base,
3475 const struct object_id *ours,
3476 const struct object_id *theirs)
3478 mmfile_t base_file, our_file, their_file;
3479 mmbuffer_t result = { NULL };
3482 read_mmblob(&base_file, base);
3483 read_mmblob(&our_file, ours);
3484 read_mmblob(&their_file, theirs);
3485 status = ll_merge(&result, path,
3488 &their_file, "theirs",
3491 free(base_file.ptr);
3493 free(their_file.ptr);
3494 if (status < 0 || !result.ptr) {
3499 image->buf = result.ptr;
3500 image->len = result.size;
3506 * When directly falling back to add/add three-way merge, we read from
3507 * the current contents of the new_name. In no cases other than that
3508 * this function will be called.
3510 static int load_current(struct apply_state *state,
3511 struct image *image,
3512 struct patch *patch)
3514 struct strbuf buf = STRBUF_INIT;
3519 struct cache_entry *ce;
3520 char *name = patch->new_name;
3521 unsigned mode = patch->new_mode;
3524 BUG("patch to %s is not a creation", patch->old_name);
3526 pos = index_name_pos(state->repo->index, name, strlen(name));
3528 return error(_("%s: does not exist in index"), name);
3529 ce = state->repo->index->cache[pos];
3530 if (lstat(name, &st)) {
3531 if (errno != ENOENT)
3532 return error_errno("%s", name);
3533 if (checkout_target(state->repo->index, ce, &st))
3536 if (verify_index_match(state, ce, &st))
3537 return error(_("%s: does not match index"), name);
3539 status = load_patch_target(state, &buf, ce, &st, patch, name, mode);
3544 img = strbuf_detach(&buf, &len);
3545 prepare_image(image, img, len, !patch->is_binary);
3549 static int try_threeway(struct apply_state *state,
3550 struct image *image,
3551 struct patch *patch,
3553 const struct cache_entry *ce)
3555 struct object_id pre_oid, post_oid, our_oid;
3556 struct strbuf buf = STRBUF_INIT;
3560 struct image tmp_image;
3562 /* No point falling back to 3-way merge in these cases */
3563 if (patch->is_delete ||
3564 S_ISGITLINK(patch->old_mode) || S_ISGITLINK(patch->new_mode))
3567 /* Preimage the patch was prepared for */
3569 write_object_file("", 0, blob_type, &pre_oid);
3570 else if (get_oid(patch->old_oid_prefix, &pre_oid) ||
3571 read_blob_object(&buf, &pre_oid, patch->old_mode))
3572 return error(_("repository lacks the necessary blob to fall back on 3-way merge."));
3574 if (state->apply_verbosity > verbosity_silent)
3575 fprintf(stderr, _("Falling back to three-way merge...\n"));
3577 img = strbuf_detach(&buf, &len);
3578 prepare_image(&tmp_image, img, len, 1);
3579 /* Apply the patch to get the post image */
3580 if (apply_fragments(state, &tmp_image, patch) < 0) {
3581 clear_image(&tmp_image);
3584 /* post_oid is theirs */
3585 write_object_file(tmp_image.buf, tmp_image.len, blob_type, &post_oid);
3586 clear_image(&tmp_image);
3588 /* our_oid is ours */
3589 if (patch->is_new) {
3590 if (load_current(state, &tmp_image, patch))
3591 return error(_("cannot read the current contents of '%s'"),
3594 if (load_preimage(state, &tmp_image, patch, st, ce))
3595 return error(_("cannot read the current contents of '%s'"),
3598 write_object_file(tmp_image.buf, tmp_image.len, blob_type, &our_oid);
3599 clear_image(&tmp_image);
3601 /* in-core three-way merge between post and our using pre as base */
3602 status = three_way_merge(state, image, patch->new_name,
3603 &pre_oid, &our_oid, &post_oid);
3605 if (state->apply_verbosity > verbosity_silent)
3607 _("Failed to fall back on three-way merge...\n"));
3612 patch->conflicted_threeway = 1;
3614 oidclr(&patch->threeway_stage[0]);
3616 oidcpy(&patch->threeway_stage[0], &pre_oid);
3617 oidcpy(&patch->threeway_stage[1], &our_oid);
3618 oidcpy(&patch->threeway_stage[2], &post_oid);
3619 if (state->apply_verbosity > verbosity_silent)
3621 _("Applied patch to '%s' with conflicts.\n"),
3624 if (state->apply_verbosity > verbosity_silent)
3626 _("Applied patch to '%s' cleanly.\n"),
3632 static int apply_data(struct apply_state *state, struct patch *patch,
3633 struct stat *st, const struct cache_entry *ce)
3637 if (load_preimage(state, &image, patch, st, ce) < 0)
3640 if (patch->direct_to_threeway ||
3641 apply_fragments(state, &image, patch) < 0) {
3642 /* Note: with --reject, apply_fragments() returns 0 */
3643 if (!state->threeway || try_threeway(state, &image, patch, st, ce) < 0)
3646 patch->result = image.buf;
3647 patch->resultsize = image.len;
3648 add_to_fn_table(state, patch);
3649 free(image.line_allocated);
3651 if (0 < patch->is_delete && patch->resultsize)
3652 return error(_("removal patch leaves file contents"));
3658 * If "patch" that we are looking at modifies or deletes what we have,
3659 * we would want it not to lose any local modification we have, either
3660 * in the working tree or in the index.
3662 * This also decides if a non-git patch is a creation patch or a
3663 * modification to an existing empty file. We do not check the state
3664 * of the current tree for a creation patch in this function; the caller
3665 * check_patch() separately makes sure (and errors out otherwise) that
3666 * the path the patch creates does not exist in the current tree.
3668 static int check_preimage(struct apply_state *state,
3669 struct patch *patch,
3670 struct cache_entry **ce,
3673 const char *old_name = patch->old_name;
3674 struct patch *previous = NULL;
3675 int stat_ret = 0, status;
3676 unsigned st_mode = 0;
3681 assert(patch->is_new <= 0);
3682 previous = previous_patch(state, patch, &status);
3685 return error(_("path %s has been renamed/deleted"), old_name);
3687 st_mode = previous->new_mode;
3688 } else if (!state->cached) {
3689 stat_ret = lstat(old_name, st);
3690 if (stat_ret && errno != ENOENT)
3691 return error_errno("%s", old_name);
3694 if (state->check_index && !previous) {
3695 int pos = index_name_pos(state->repo->index, old_name,
3698 if (patch->is_new < 0)
3700 return error(_("%s: does not exist in index"), old_name);
3702 *ce = state->repo->index->cache[pos];
3704 if (checkout_target(state->repo->index, *ce, st))
3707 if (!state->cached && verify_index_match(state, *ce, st))
3708 return error(_("%s: does not match index"), old_name);
3710 st_mode = (*ce)->ce_mode;
3711 } else if (stat_ret < 0) {
3712 if (patch->is_new < 0)
3714 return error_errno("%s", old_name);
3717 if (!state->cached && !previous)
3718 st_mode = ce_mode_from_stat(*ce, st->st_mode);
3720 if (patch->is_new < 0)
3722 if (!patch->old_mode)
3723 patch->old_mode = st_mode;
3724 if ((st_mode ^ patch->old_mode) & S_IFMT)
3725 return error(_("%s: wrong type"), old_name);
3726 if (st_mode != patch->old_mode)
3727 warning(_("%s has type %o, expected %o"),
3728 old_name, st_mode, patch->old_mode);
3729 if (!patch->new_mode && !patch->is_delete)
3730 patch->new_mode = st_mode;
3735 patch->is_delete = 0;
3736 FREE_AND_NULL(patch->old_name);
3741 #define EXISTS_IN_INDEX 1
3742 #define EXISTS_IN_WORKTREE 2
3743 #define EXISTS_IN_INDEX_AS_ITA 3
3745 static int check_to_create(struct apply_state *state,
3746 const char *new_name,
3751 if (state->check_index && (!ok_if_exists || !state->cached)) {
3754 pos = index_name_pos(state->repo->index, new_name, strlen(new_name));
3756 struct cache_entry *ce = state->repo->index->cache[pos];
3758 /* allow ITA, as they do not yet exist in the index */
3759 if (!ok_if_exists && !(ce->ce_flags & CE_INTENT_TO_ADD))
3760 return EXISTS_IN_INDEX;
3762 /* ITA entries can never match working tree files */
3763 if (!state->cached && (ce->ce_flags & CE_INTENT_TO_ADD))
3764 return EXISTS_IN_INDEX_AS_ITA;
3771 if (!lstat(new_name, &nst)) {
3772 if (S_ISDIR(nst.st_mode) || ok_if_exists)
3775 * A leading component of new_name might be a symlink
3776 * that is going to be removed with this patch, but
3777 * still pointing at somewhere that has the path.
3778 * In such a case, path "new_name" does not exist as
3779 * far as git is concerned.
3781 if (has_symlink_leading_path(new_name, strlen(new_name)))
3784 return EXISTS_IN_WORKTREE;
3785 } else if (!is_missing_file_error(errno)) {
3786 return error_errno("%s", new_name);
3791 static uintptr_t register_symlink_changes(struct apply_state *state,
3795 struct string_list_item *ent;
3797 ent = string_list_lookup(&state->symlink_changes, path);
3799 ent = string_list_insert(&state->symlink_changes, path);
3800 ent->util = (void *)0;
3802 ent->util = (void *)(what | ((uintptr_t)ent->util));
3803 return (uintptr_t)ent->util;
3806 static uintptr_t check_symlink_changes(struct apply_state *state, const char *path)
3808 struct string_list_item *ent;
3810 ent = string_list_lookup(&state->symlink_changes, path);
3813 return (uintptr_t)ent->util;
3816 static void prepare_symlink_changes(struct apply_state *state, struct patch *patch)
3818 for ( ; patch; patch = patch->next) {
3819 if ((patch->old_name && S_ISLNK(patch->old_mode)) &&
3820 (patch->is_rename || patch->is_delete))
3821 /* the symlink at patch->old_name is removed */
3822 register_symlink_changes(state, patch->old_name, APPLY_SYMLINK_GOES_AWAY);
3824 if (patch->new_name && S_ISLNK(patch->new_mode))
3825 /* the symlink at patch->new_name is created or remains */
3826 register_symlink_changes(state, patch->new_name, APPLY_SYMLINK_IN_RESULT);
3830 static int path_is_beyond_symlink_1(struct apply_state *state, struct strbuf *name)
3833 unsigned int change;
3835 while (--name->len && name->buf[name->len] != '/')
3836 ; /* scan backwards */
3839 name->buf[name->len] = '\0';
3840 change = check_symlink_changes(state, name->buf);
3841 if (change & APPLY_SYMLINK_IN_RESULT)
3843 if (change & APPLY_SYMLINK_GOES_AWAY)
3845 * This cannot be "return 0", because we may
3846 * see a new one created at a higher level.
3850 /* otherwise, check the preimage */
3851 if (state->check_index) {
3852 struct cache_entry *ce;
3854 ce = index_file_exists(state->repo->index, name->buf,
3855 name->len, ignore_case);
3856 if (ce && S_ISLNK(ce->ce_mode))
3860 if (!lstat(name->buf, &st) && S_ISLNK(st.st_mode))
3867 static int path_is_beyond_symlink(struct apply_state *state, const char *name_)
3870 struct strbuf name = STRBUF_INIT;
3872 assert(*name_ != '\0');
3873 strbuf_addstr(&name, name_);
3874 ret = path_is_beyond_symlink_1(state, &name);
3875 strbuf_release(&name);
3880 static int check_unsafe_path(struct patch *patch)
3882 const char *old_name = NULL;
3883 const char *new_name = NULL;
3884 if (patch->is_delete)
3885 old_name = patch->old_name;
3886 else if (!patch->is_new && !patch->is_copy)
3887 old_name = patch->old_name;
3888 if (!patch->is_delete)
3889 new_name = patch->new_name;
3891 if (old_name && !verify_path(old_name, patch->old_mode))
3892 return error(_("invalid path '%s'"), old_name);
3893 if (new_name && !verify_path(new_name, patch->new_mode))
3894 return error(_("invalid path '%s'"), new_name);
3899 * Check and apply the patch in-core; leave the result in patch->result
3900 * for the caller to write it out to the final destination.
3902 static int check_patch(struct apply_state *state, struct patch *patch)
3905 const char *old_name = patch->old_name;
3906 const char *new_name = patch->new_name;
3907 const char *name = old_name ? old_name : new_name;
3908 struct cache_entry *ce = NULL;
3909 struct patch *tpatch;
3913 patch->rejected = 1; /* we will drop this after we succeed */
3915 status = check_preimage(state, patch, &ce, &st);
3918 old_name = patch->old_name;
3921 * A type-change diff is always split into a patch to delete
3922 * old, immediately followed by a patch to create new (see
3923 * diff.c::run_diff()); in such a case it is Ok that the entry
3924 * to be deleted by the previous patch is still in the working
3925 * tree and in the index.
3927 * A patch to swap-rename between A and B would first rename A
3928 * to B and then rename B to A. While applying the first one,
3929 * the presence of B should not stop A from getting renamed to
3930 * B; ask to_be_deleted() about the later rename. Removal of
3931 * B and rename from A to B is handled the same way by asking
3934 if ((tpatch = in_fn_table(state, new_name)) &&
3935 (was_deleted(tpatch) || to_be_deleted(tpatch)))
3941 ((0 < patch->is_new) || patch->is_rename || patch->is_copy)) {
3942 int err = check_to_create(state, new_name, ok_if_exists);
3944 if (err && state->threeway) {
3945 patch->direct_to_threeway = 1;
3946 } else switch (err) {
3949 case EXISTS_IN_INDEX:
3950 return error(_("%s: already exists in index"), new_name);
3952 case EXISTS_IN_INDEX_AS_ITA:
3953 return error(_("%s: does not match index"), new_name);
3955 case EXISTS_IN_WORKTREE:
3956 return error(_("%s: already exists in working directory"),
3962 if (!patch->new_mode) {
3963 if (0 < patch->is_new)
3964 patch->new_mode = S_IFREG | 0644;
3966 patch->new_mode = patch->old_mode;
3970 if (new_name && old_name) {
3971 int same = !strcmp(old_name, new_name);
3972 if (!patch->new_mode)
3973 patch->new_mode = patch->old_mode;
3974 if ((patch->old_mode ^ patch->new_mode) & S_IFMT) {
3976 return error(_("new mode (%o) of %s does not "
3977 "match old mode (%o)"),
3978 patch->new_mode, new_name,
3981 return error(_("new mode (%o) of %s does not "
3982 "match old mode (%o) of %s"),
3983 patch->new_mode, new_name,
3984 patch->old_mode, old_name);
3988 if (!state->unsafe_paths && check_unsafe_path(patch))
3992 * An attempt to read from or delete a path that is beyond a
3993 * symbolic link will be prevented by load_patch_target() that
3994 * is called at the beginning of apply_data() so we do not
3995 * have to worry about a patch marked with "is_delete" bit
3996 * here. We however need to make sure that the patch result
3997 * is not deposited to a path that is beyond a symbolic link
4000 if (!patch->is_delete && path_is_beyond_symlink(state, patch->new_name))
4001 return error(_("affected file '%s' is beyond a symbolic link"),
4004 if (apply_data(state, patch, &st, ce) < 0)
4005 return error(_("%s: patch does not apply"), name);
4006 patch->rejected = 0;
4010 static int check_patch_list(struct apply_state *state, struct patch *patch)
4014 prepare_symlink_changes(state, patch);
4015 prepare_fn_table(state, patch);
4018 if (state->apply_verbosity > verbosity_normal)
4019 say_patch_name(stderr,
4020 _("Checking patch %s..."), patch);
4021 res = check_patch(state, patch);
4025 patch = patch->next;
4030 static int read_apply_cache(struct apply_state *state)
4032 if (state->index_file)
4033 return read_index_from(state->repo->index, state->index_file,
4036 return repo_read_index(state->repo);
4039 /* This function tries to read the object name from the current index */
4040 static int get_current_oid(struct apply_state *state, const char *path,
4041 struct object_id *oid)
4045 if (read_apply_cache(state) < 0)
4047 pos = index_name_pos(state->repo->index, path, strlen(path));
4050 oidcpy(oid, &state->repo->index->cache[pos]->oid);
4054 static int preimage_oid_in_gitlink_patch(struct patch *p, struct object_id *oid)
4057 * A usable gitlink patch has only one fragment (hunk) that looks like:
4059 * -Subproject commit <old sha1>
4060 * +Subproject commit <new sha1>
4063 * -Subproject commit <old sha1>
4064 * for a removal patch.
4066 struct fragment *hunk = p->fragments;
4067 static const char heading[] = "-Subproject commit ";
4070 if (/* does the patch have only one hunk? */
4071 hunk && !hunk->next &&
4072 /* is its preimage one line? */
4073 hunk->oldpos == 1 && hunk->oldlines == 1 &&
4074 /* does preimage begin with the heading? */
4075 (preimage = memchr(hunk->patch, '\n', hunk->size)) != NULL &&
4076 starts_with(++preimage, heading) &&
4077 /* does it record full SHA-1? */
4078 !get_oid_hex(preimage + sizeof(heading) - 1, oid) &&
4079 preimage[sizeof(heading) + the_hash_algo->hexsz - 1] == '\n' &&
4080 /* does the abbreviated name on the index line agree with it? */
4081 starts_with(preimage + sizeof(heading) - 1, p->old_oid_prefix))
4082 return 0; /* it all looks fine */
4084 /* we may have full object name on the index line */
4085 return get_oid_hex(p->old_oid_prefix, oid);
4088 /* Build an index that contains just the files needed for a 3way merge */
4089 static int build_fake_ancestor(struct apply_state *state, struct patch *list)
4091 struct patch *patch;
4092 struct index_state result = { NULL };
4093 struct lock_file lock = LOCK_INIT;
4096 /* Once we start supporting the reverse patch, it may be
4097 * worth showing the new sha1 prefix, but until then...
4099 for (patch = list; patch; patch = patch->next) {
4100 struct object_id oid;
4101 struct cache_entry *ce;
4104 name = patch->old_name ? patch->old_name : patch->new_name;
4105 if (0 < patch->is_new)
4108 if (S_ISGITLINK(patch->old_mode)) {
4109 if (!preimage_oid_in_gitlink_patch(patch, &oid))
4110 ; /* ok, the textual part looks sane */
4112 return error(_("sha1 information is lacking or "
4113 "useless for submodule %s"), name);
4114 } else if (!get_oid_blob(patch->old_oid_prefix, &oid)) {
4116 } else if (!patch->lines_added && !patch->lines_deleted) {
4117 /* mode-only change: update the current */
4118 if (get_current_oid(state, patch->old_name, &oid))
4119 return error(_("mode change for %s, which is not "
4120 "in current HEAD"), name);
4122 return error(_("sha1 information is lacking or useless "
4125 ce = make_cache_entry(&result, patch->old_mode, &oid, name, 0, 0);
4127 return error(_("make_cache_entry failed for path '%s'"),
4129 if (add_index_entry(&result, ce, ADD_CACHE_OK_TO_ADD)) {
4130 discard_cache_entry(ce);
4131 return error(_("could not add %s to temporary index"),
4136 hold_lock_file_for_update(&lock, state->fake_ancestor, LOCK_DIE_ON_ERROR);
4137 res = write_locked_index(&result, &lock, COMMIT_LOCK);
4138 discard_index(&result);
4141 return error(_("could not write temporary index to %s"),
4142 state->fake_ancestor);
4147 static void stat_patch_list(struct apply_state *state, struct patch *patch)
4149 int files, adds, dels;
4151 for (files = adds = dels = 0 ; patch ; patch = patch->next) {
4153 adds += patch->lines_added;
4154 dels += patch->lines_deleted;
4155 show_stats(state, patch);
4158 print_stat_summary(stdout, files, adds, dels);
4161 static void numstat_patch_list(struct apply_state *state,
4162 struct patch *patch)
4164 for ( ; patch; patch = patch->next) {
4166 name = patch->new_name ? patch->new_name : patch->old_name;
4167 if (patch->is_binary)
4170 printf("%d\t%d\t", patch->lines_added, patch->lines_deleted);
4171 write_name_quoted(name, stdout, state->line_termination);
4175 static void show_file_mode_name(const char *newdelete, unsigned int mode, const char *name)
4178 printf(" %s mode %06o %s\n", newdelete, mode, name);
4180 printf(" %s %s\n", newdelete, name);
4183 static void show_mode_change(struct patch *p, int show_name)
4185 if (p->old_mode && p->new_mode && p->old_mode != p->new_mode) {
4187 printf(" mode change %06o => %06o %s\n",
4188 p->old_mode, p->new_mode, p->new_name);
4190 printf(" mode change %06o => %06o\n",
4191 p->old_mode, p->new_mode);
4195 static void show_rename_copy(struct patch *p)
4197 const char *renamecopy = p->is_rename ? "rename" : "copy";
4198 const char *old_name, *new_name;
4200 /* Find common prefix */
4201 old_name = p->old_name;
4202 new_name = p->new_name;
4204 const char *slash_old, *slash_new;
4205 slash_old = strchr(old_name, '/');
4206 slash_new = strchr(new_name, '/');
4209 slash_old - old_name != slash_new - new_name ||
4210 memcmp(old_name, new_name, slash_new - new_name))
4212 old_name = slash_old + 1;
4213 new_name = slash_new + 1;
4215 /* p->old_name through old_name is the common prefix, and old_name and
4216 * new_name through the end of names are renames
4218 if (old_name != p->old_name)
4219 printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy,
4220 (int)(old_name - p->old_name), p->old_name,
4221 old_name, new_name, p->score);
4223 printf(" %s %s => %s (%d%%)\n", renamecopy,
4224 p->old_name, p->new_name, p->score);
4225 show_mode_change(p, 0);
4228 static void summary_patch_list(struct patch *patch)
4232 for (p = patch; p; p = p->next) {
4234 show_file_mode_name("create", p->new_mode, p->new_name);
4235 else if (p->is_delete)
4236 show_file_mode_name("delete", p->old_mode, p->old_name);
4238 if (p->is_rename || p->is_copy)
4239 show_rename_copy(p);
4242 printf(" rewrite %s (%d%%)\n",
4243 p->new_name, p->score);
4244 show_mode_change(p, 0);
4247 show_mode_change(p, 1);
4253 static void patch_stats(struct apply_state *state, struct patch *patch)
4255 int lines = patch->lines_added + patch->lines_deleted;
4257 if (lines > state->max_change)
4258 state->max_change = lines;
4259 if (patch->old_name) {
4260 int len = quote_c_style(patch->old_name, NULL, NULL, 0);
4262 len = strlen(patch->old_name);
4263 if (len > state->max_len)
4264 state->max_len = len;
4266 if (patch->new_name) {
4267 int len = quote_c_style(patch->new_name, NULL, NULL, 0);
4269 len = strlen(patch->new_name);
4270 if (len > state->max_len)
4271 state->max_len = len;
4275 static int remove_file(struct apply_state *state, struct patch *patch, int rmdir_empty)
4277 if (state->update_index && !state->ita_only) {
4278 if (remove_file_from_index(state->repo->index, patch->old_name) < 0)
4279 return error(_("unable to remove %s from index"), patch->old_name);
4281 if (!state->cached) {
4282 if (!remove_or_warn(patch->old_mode, patch->old_name) && rmdir_empty) {
4283 remove_path(patch->old_name);
4289 static int add_index_file(struct apply_state *state,
4296 struct cache_entry *ce;
4297 int namelen = strlen(path);
4299 ce = make_empty_cache_entry(state->repo->index, namelen);
4300 memcpy(ce->name, path, namelen);
4301 ce->ce_mode = create_ce_mode(mode);
4302 ce->ce_flags = create_ce_flags(0);
4303 ce->ce_namelen = namelen;
4304 if (state->ita_only) {
4305 ce->ce_flags |= CE_INTENT_TO_ADD;
4306 set_object_name_for_intent_to_add_entry(ce);
4307 } else if (S_ISGITLINK(mode)) {
4310 if (!skip_prefix(buf, "Subproject commit ", &s) ||
4311 get_oid_hex(s, &ce->oid)) {
4312 discard_cache_entry(ce);
4313 return error(_("corrupt patch for submodule %s"), path);
4316 if (!state->cached) {
4317 if (lstat(path, &st) < 0) {
4318 discard_cache_entry(ce);
4319 return error_errno(_("unable to stat newly "
4320 "created file '%s'"),
4323 fill_stat_cache_info(state->repo->index, ce, &st);
4325 if (write_object_file(buf, size, blob_type, &ce->oid) < 0) {
4326 discard_cache_entry(ce);
4327 return error(_("unable to create backing store "
4328 "for newly created file %s"), path);
4331 if (add_index_entry(state->repo->index, ce, ADD_CACHE_OK_TO_ADD) < 0) {
4332 discard_cache_entry(ce);
4333 return error(_("unable to add cache entry for %s"), path);
4341 * -1 if an unrecoverable error happened
4342 * 0 if everything went well
4343 * 1 if a recoverable error happened
4345 static int try_create_file(struct apply_state *state, const char *path,
4346 unsigned int mode, const char *buf,
4350 struct strbuf nbuf = STRBUF_INIT;
4352 if (S_ISGITLINK(mode)) {
4354 if (!lstat(path, &st) && S_ISDIR(st.st_mode))
4356 return !!mkdir(path, 0777);
4359 if (has_symlinks && S_ISLNK(mode))
4360 /* Although buf:size is counted string, it also is NUL
4363 return !!symlink(buf, path);
4365 fd = open(path, O_CREAT | O_EXCL | O_WRONLY, (mode & 0100) ? 0777 : 0666);
4369 if (convert_to_working_tree(state->repo->index, path, buf, size, &nbuf, NULL)) {
4374 res = write_in_full(fd, buf, size) < 0;
4376 error_errno(_("failed to write to '%s'"), path);
4377 strbuf_release(&nbuf);
4379 if (close(fd) < 0 && !res)
4380 return error_errno(_("closing file '%s'"), path);
4382 return res ? -1 : 0;
4386 * We optimistically assume that the directories exist,
4387 * which is true 99% of the time anyway. If they don't,
4388 * we create them and try again.
4394 static int create_one_file(struct apply_state *state,
4405 res = try_create_file(state, path, mode, buf, size);
4411 if (errno == ENOENT) {
4412 if (safe_create_leading_directories(path))
4414 res = try_create_file(state, path, mode, buf, size);
4421 if (errno == EEXIST || errno == EACCES) {
4422 /* We may be trying to create a file where a directory
4426 if (!lstat(path, &st) && (!S_ISDIR(st.st_mode) || !rmdir(path)))
4430 if (errno == EEXIST) {
4431 unsigned int nr = getpid();
4434 char newpath[PATH_MAX];
4435 mksnpath(newpath, sizeof(newpath), "%s~%u", path, nr);
4436 res = try_create_file(state, newpath, mode, buf, size);
4440 if (!rename(newpath, path))
4442 unlink_or_warn(newpath);
4445 if (errno != EEXIST)
4450 return error_errno(_("unable to write file '%s' mode %o"),
4454 static int add_conflicted_stages_file(struct apply_state *state,
4455 struct patch *patch)
4459 struct cache_entry *ce;
4461 if (!state->update_index)
4463 namelen = strlen(patch->new_name);
4464 mode = patch->new_mode ? patch->new_mode : (S_IFREG | 0644);
4466 remove_file_from_index(state->repo->index, patch->new_name);
4467 for (stage = 1; stage < 4; stage++) {
4468 if (is_null_oid(&patch->threeway_stage[stage - 1]))
4470 ce = make_empty_cache_entry(state->repo->index, namelen);
4471 memcpy(ce->name, patch->new_name, namelen);
4472 ce->ce_mode = create_ce_mode(mode);
4473 ce->ce_flags = create_ce_flags(stage);
4474 ce->ce_namelen = namelen;
4475 oidcpy(&ce->oid, &patch->threeway_stage[stage - 1]);
4476 if (add_index_entry(state->repo->index, ce, ADD_CACHE_OK_TO_ADD) < 0) {
4477 discard_cache_entry(ce);
4478 return error(_("unable to add cache entry for %s"),
4486 static int create_file(struct apply_state *state, struct patch *patch)
4488 char *path = patch->new_name;
4489 unsigned mode = patch->new_mode;
4490 unsigned long size = patch->resultsize;
4491 char *buf = patch->result;
4494 mode = S_IFREG | 0644;
4495 if (create_one_file(state, path, mode, buf, size))
4498 if (patch->conflicted_threeway)
4499 return add_conflicted_stages_file(state, patch);
4500 else if (state->update_index)
4501 return add_index_file(state, path, mode, buf, size);
4505 /* phase zero is to remove, phase one is to create */
4506 static int write_out_one_result(struct apply_state *state,
4507 struct patch *patch,
4510 if (patch->is_delete > 0) {
4512 return remove_file(state, patch, 1);
4515 if (patch->is_new > 0 || patch->is_copy) {
4517 return create_file(state, patch);
4521 * Rename or modification boils down to the same
4522 * thing: remove the old, write the new
4525 return remove_file(state, patch, patch->is_rename);
4527 return create_file(state, patch);
4531 static int write_out_one_reject(struct apply_state *state, struct patch *patch)
4534 char namebuf[PATH_MAX];
4535 struct fragment *frag;
4537 struct strbuf sb = STRBUF_INIT;
4539 for (cnt = 0, frag = patch->fragments; frag; frag = frag->next) {
4540 if (!frag->rejected)
4546 if (state->apply_verbosity > verbosity_normal)
4547 say_patch_name(stderr,
4548 _("Applied patch %s cleanly."), patch);
4552 /* This should not happen, because a removal patch that leaves
4553 * contents are marked "rejected" at the patch level.
4555 if (!patch->new_name)
4556 die(_("internal error"));
4558 /* Say this even without --verbose */
4559 strbuf_addf(&sb, Q_("Applying patch %%s with %d reject...",
4560 "Applying patch %%s with %d rejects...",
4563 if (state->apply_verbosity > verbosity_silent)
4564 say_patch_name(stderr, sb.buf, patch);
4565 strbuf_release(&sb);
4567 cnt = strlen(patch->new_name);
4568 if (ARRAY_SIZE(namebuf) <= cnt + 5) {
4569 cnt = ARRAY_SIZE(namebuf) - 5;
4570 warning(_("truncating .rej filename to %.*s.rej"),
4571 cnt - 1, patch->new_name);
4573 memcpy(namebuf, patch->new_name, cnt);
4574 memcpy(namebuf + cnt, ".rej", 5);
4576 rej = fopen(namebuf, "w");
4578 return error_errno(_("cannot open %s"), namebuf);
4580 /* Normal git tools never deal with .rej, so do not pretend
4581 * this is a git patch by saying --git or giving extended
4582 * headers. While at it, maybe please "kompare" that wants
4583 * the trailing TAB and some garbage at the end of line ;-).
4585 fprintf(rej, "diff a/%s b/%s\t(rejected hunks)\n",
4586 patch->new_name, patch->new_name);
4587 for (cnt = 1, frag = patch->fragments;
4589 cnt++, frag = frag->next) {
4590 if (!frag->rejected) {
4591 if (state->apply_verbosity > verbosity_silent)
4592 fprintf_ln(stderr, _("Hunk #%d applied cleanly."), cnt);
4595 if (state->apply_verbosity > verbosity_silent)
4596 fprintf_ln(stderr, _("Rejected hunk #%d."), cnt);
4597 fprintf(rej, "%.*s", frag->size, frag->patch);
4598 if (frag->patch[frag->size-1] != '\n')
4607 * -1 if an error happened
4608 * 0 if the patch applied cleanly
4609 * 1 if the patch did not apply cleanly
4611 static int write_out_results(struct apply_state *state, struct patch *list)
4616 struct string_list cpath = STRING_LIST_INIT_DUP;
4618 for (phase = 0; phase < 2; phase++) {
4624 if (write_out_one_result(state, l, phase)) {
4625 string_list_clear(&cpath, 0);
4629 if (write_out_one_reject(state, l))
4631 if (l->conflicted_threeway) {
4632 string_list_append(&cpath, l->new_name);
4642 struct string_list_item *item;
4644 string_list_sort(&cpath);
4645 if (state->apply_verbosity > verbosity_silent) {
4646 for_each_string_list_item(item, &cpath)
4647 fprintf(stderr, "U %s\n", item->string);
4649 string_list_clear(&cpath, 0);
4651 repo_rerere(state->repo, 0);
4658 * Try to apply a patch.
4661 * -128 if a bad error happened (like patch unreadable)
4662 * -1 if patch did not apply and user cannot deal with it
4663 * 0 if the patch applied
4664 * 1 if the patch did not apply but user might fix it
4666 static int apply_patch(struct apply_state *state,
4668 const char *filename,
4672 struct strbuf buf = STRBUF_INIT; /* owns the patch text */
4673 struct patch *list = NULL, **listp = &list;
4674 int skipped_patch = 0;
4676 int flush_attributes = 0;
4678 state->patch_input_file = filename;
4679 if (read_patch_file(&buf, fd) < 0)
4682 while (offset < buf.len) {
4683 struct patch *patch;
4686 patch = xcalloc(1, sizeof(*patch));
4687 patch->inaccurate_eof = !!(options & APPLY_OPT_INACCURATE_EOF);
4688 patch->recount = !!(options & APPLY_OPT_RECOUNT);
4689 nr = parse_chunk(state, buf.buf + offset, buf.len - offset, patch);
4698 if (state->apply_in_reverse)
4699 reverse_patches(patch);
4700 if (use_patch(state, patch)) {
4701 patch_stats(state, patch);
4703 listp = &patch->next;
4705 if ((patch->new_name &&
4706 ends_with_path_components(patch->new_name,
4707 GITATTRIBUTES_FILE)) ||
4709 ends_with_path_components(patch->old_name,
4710 GITATTRIBUTES_FILE)))
4711 flush_attributes = 1;
4714 if (state->apply_verbosity > verbosity_normal)
4715 say_patch_name(stderr, _("Skipped patch '%s'."), patch);
4722 if (!list && !skipped_patch) {
4723 error(_("unrecognized input"));
4728 if (state->whitespace_error && (state->ws_error_action == die_on_ws_error))
4731 state->update_index = (state->check_index || state->ita_only) && state->apply;
4732 if (state->update_index && !is_lock_file_locked(&state->lock_file)) {
4733 if (state->index_file)
4734 hold_lock_file_for_update(&state->lock_file,
4738 repo_hold_locked_index(state->repo, &state->lock_file,
4742 if (state->check_index && read_apply_cache(state) < 0) {
4743 error(_("unable to read index file"));
4748 if (state->check || state->apply) {
4749 int r = check_patch_list(state, list);
4754 if (r < 0 && !state->apply_with_reject) {
4761 int write_res = write_out_results(state, list);
4762 if (write_res < 0) {
4766 if (write_res > 0) {
4767 /* with --3way, we still need to write the index out */
4768 res = state->apply_with_reject ? -1 : 1;
4773 if (state->fake_ancestor &&
4774 build_fake_ancestor(state, list)) {
4779 if (state->diffstat && state->apply_verbosity > verbosity_silent)
4780 stat_patch_list(state, list);
4782 if (state->numstat && state->apply_verbosity > verbosity_silent)
4783 numstat_patch_list(state, list);
4785 if (state->summary && state->apply_verbosity > verbosity_silent)
4786 summary_patch_list(list);
4788 if (flush_attributes)
4789 reset_parsed_attributes();
4791 free_patch_list(list);
4792 strbuf_release(&buf);
4793 string_list_clear(&state->fn_table, 0);
4797 static int apply_option_parse_exclude(const struct option *opt,
4798 const char *arg, int unset)
4800 struct apply_state *state = opt->value;
4802 BUG_ON_OPT_NEG(unset);
4804 add_name_limit(state, arg, 1);
4808 static int apply_option_parse_include(const struct option *opt,
4809 const char *arg, int unset)
4811 struct apply_state *state = opt->value;
4813 BUG_ON_OPT_NEG(unset);
4815 add_name_limit(state, arg, 0);
4816 state->has_include = 1;
4820 static int apply_option_parse_p(const struct option *opt,
4824 struct apply_state *state = opt->value;
4826 BUG_ON_OPT_NEG(unset);
4828 state->p_value = atoi(arg);
4829 state->p_value_known = 1;
4833 static int apply_option_parse_space_change(const struct option *opt,
4834 const char *arg, int unset)
4836 struct apply_state *state = opt->value;
4838 BUG_ON_OPT_ARG(arg);
4841 state->ws_ignore_action = ignore_ws_none;
4843 state->ws_ignore_action = ignore_ws_change;
4847 static int apply_option_parse_whitespace(const struct option *opt,
4848 const char *arg, int unset)
4850 struct apply_state *state = opt->value;
4852 BUG_ON_OPT_NEG(unset);
4854 state->whitespace_option = arg;
4855 if (parse_whitespace_option(state, arg))
4860 static int apply_option_parse_directory(const struct option *opt,
4861 const char *arg, int unset)
4863 struct apply_state *state = opt->value;
4865 BUG_ON_OPT_NEG(unset);
4867 strbuf_reset(&state->root);
4868 strbuf_addstr(&state->root, arg);
4869 strbuf_complete(&state->root, '/');
4873 int apply_all_patches(struct apply_state *state,
4883 for (i = 0; i < argc; i++) {
4884 const char *arg = argv[i];
4885 char *to_free = NULL;
4888 if (!strcmp(arg, "-")) {
4889 res = apply_patch(state, 0, "<stdin>", options);
4896 arg = to_free = prefix_filename(state->prefix, arg);
4898 fd = open(arg, O_RDONLY);
4900 error(_("can't open patch '%s': %s"), arg, strerror(errno));
4906 set_default_whitespace_mode(state);
4907 res = apply_patch(state, fd, arg, options);
4914 set_default_whitespace_mode(state);
4916 res = apply_patch(state, 0, "<stdin>", options);
4922 if (state->whitespace_error) {
4923 if (state->squelch_whitespace_errors &&
4924 state->squelch_whitespace_errors < state->whitespace_error) {
4926 state->whitespace_error - state->squelch_whitespace_errors;
4927 warning(Q_("squelched %d whitespace error",
4928 "squelched %d whitespace errors",
4932 if (state->ws_error_action == die_on_ws_error) {
4933 error(Q_("%d line adds whitespace errors.",
4934 "%d lines add whitespace errors.",
4935 state->whitespace_error),
4936 state->whitespace_error);
4940 if (state->applied_after_fixing_ws && state->apply)
4941 warning(Q_("%d line applied after"
4942 " fixing whitespace errors.",
4943 "%d lines applied after"
4944 " fixing whitespace errors.",
4945 state->applied_after_fixing_ws),
4946 state->applied_after_fixing_ws);
4947 else if (state->whitespace_error)
4948 warning(Q_("%d line adds whitespace errors.",
4949 "%d lines add whitespace errors.",
4950 state->whitespace_error),
4951 state->whitespace_error);
4954 if (state->update_index) {
4955 res = write_locked_index(state->repo->index, &state->lock_file, COMMIT_LOCK);
4957 error(_("Unable to write new index file"));
4966 rollback_lock_file(&state->lock_file);
4968 if (state->apply_verbosity <= verbosity_silent) {
4969 set_error_routine(state->saved_error_routine);
4970 set_warn_routine(state->saved_warn_routine);
4975 return (res == -1 ? 1 : 128);
4978 int apply_parse_options(int argc, const char **argv,
4979 struct apply_state *state,
4980 int *force_apply, int *options,
4981 const char * const *apply_usage)
4983 struct option builtin_apply_options[] = {
4984 OPT_CALLBACK_F(0, "exclude", state, N_("path"),
4985 N_("don't apply changes matching the given path"),
4986 PARSE_OPT_NONEG, apply_option_parse_exclude),
4987 OPT_CALLBACK_F(0, "include", state, N_("path"),
4988 N_("apply changes matching the given path"),
4989 PARSE_OPT_NONEG, apply_option_parse_include),
4990 OPT_CALLBACK('p', NULL, state, N_("num"),
4991 N_("remove <num> leading slashes from traditional diff paths"),
4992 apply_option_parse_p),
4993 OPT_BOOL(0, "no-add", &state->no_add,
4994 N_("ignore additions made by the patch")),
4995 OPT_BOOL(0, "stat", &state->diffstat,
4996 N_("instead of applying the patch, output diffstat for the input")),
4997 OPT_NOOP_NOARG(0, "allow-binary-replacement"),
4998 OPT_NOOP_NOARG(0, "binary"),
4999 OPT_BOOL(0, "numstat", &state->numstat,
5000 N_("show number of added and deleted lines in decimal notation")),
5001 OPT_BOOL(0, "summary", &state->summary,
5002 N_("instead of applying the patch, output a summary for the input")),
5003 OPT_BOOL(0, "check", &state->check,
5004 N_("instead of applying the patch, see if the patch is applicable")),
5005 OPT_BOOL(0, "index", &state->check_index,
5006 N_("make sure the patch is applicable to the current index")),
5007 OPT_BOOL('N', "intent-to-add", &state->ita_only,
5008 N_("mark new files with `git add --intent-to-add`")),
5009 OPT_BOOL(0, "cached", &state->cached,
5010 N_("apply a patch without touching the working tree")),
5011 OPT_BOOL_F(0, "unsafe-paths", &state->unsafe_paths,
5012 N_("accept a patch that touches outside the working area"),
5013 PARSE_OPT_NOCOMPLETE),
5014 OPT_BOOL(0, "apply", force_apply,
5015 N_("also apply the patch (use with --stat/--summary/--check)")),
5016 OPT_BOOL('3', "3way", &state->threeway,
5017 N_( "attempt three-way merge if a patch does not apply")),
5018 OPT_FILENAME(0, "build-fake-ancestor", &state->fake_ancestor,
5019 N_("build a temporary index based on embedded index information")),
5020 /* Think twice before adding "--nul" synonym to this */
5021 OPT_SET_INT('z', NULL, &state->line_termination,
5022 N_("paths are separated with NUL character"), '\0'),
5023 OPT_INTEGER('C', NULL, &state->p_context,
5024 N_("ensure at least <n> lines of context match")),
5025 OPT_CALLBACK(0, "whitespace", state, N_("action"),
5026 N_("detect new or modified lines that have whitespace errors"),
5027 apply_option_parse_whitespace),
5028 OPT_CALLBACK_F(0, "ignore-space-change", state, NULL,
5029 N_("ignore changes in whitespace when finding context"),
5030 PARSE_OPT_NOARG, apply_option_parse_space_change),
5031 OPT_CALLBACK_F(0, "ignore-whitespace", state, NULL,
5032 N_("ignore changes in whitespace when finding context"),
5033 PARSE_OPT_NOARG, apply_option_parse_space_change),
5034 OPT_BOOL('R', "reverse", &state->apply_in_reverse,
5035 N_("apply the patch in reverse")),
5036 OPT_BOOL(0, "unidiff-zero", &state->unidiff_zero,
5037 N_("don't expect at least one line of context")),
5038 OPT_BOOL(0, "reject", &state->apply_with_reject,
5039 N_("leave the rejected hunks in corresponding *.rej files")),
5040 OPT_BOOL(0, "allow-overlap", &state->allow_overlap,
5041 N_("allow overlapping hunks")),
5042 OPT__VERBOSE(&state->apply_verbosity, N_("be verbose")),
5043 OPT_BIT(0, "inaccurate-eof", options,
5044 N_("tolerate incorrectly detected missing new-line at the end of file"),
5045 APPLY_OPT_INACCURATE_EOF),
5046 OPT_BIT(0, "recount", options,
5047 N_("do not trust the line counts in the hunk headers"),
5049 OPT_CALLBACK(0, "directory", state, N_("root"),
5050 N_("prepend <root> to all filenames"),
5051 apply_option_parse_directory),
5055 return parse_options(argc, argv, state->prefix, builtin_apply_options, apply_usage, 0);