Merge branch 'bp/commit-p-editor' into maint
[git] / builtin / clean.c
1 /*
2  * "git clean" builtin command
3  *
4  * Copyright (C) 2007 Shawn Bohrer
5  *
6  * Based on git-clean.sh by Pavel Roskin
7  */
8
9 #include "builtin.h"
10 #include "cache.h"
11 #include "dir.h"
12 #include "parse-options.h"
13 #include "refs.h"
14 #include "string-list.h"
15 #include "quote.h"
16 #include "column.h"
17 #include "color.h"
18 #include "pathspec.h"
19
20 static int force = -1; /* unset */
21 static int interactive;
22 static struct string_list del_list = STRING_LIST_INIT_DUP;
23 static unsigned int colopts;
24
25 static const char *const builtin_clean_usage[] = {
26         N_("git clean [-d] [-f] [-i] [-n] [-q] [-e <pattern>] [-x | -X] [--] <paths>..."),
27         NULL
28 };
29
30 static const char *msg_remove = N_("Removing %s\n");
31 static const char *msg_would_remove = N_("Would remove %s\n");
32 static const char *msg_skip_git_dir = N_("Skipping repository %s\n");
33 static const char *msg_would_skip_git_dir = N_("Would skip repository %s\n");
34 static const char *msg_warn_remove_failed = N_("failed to remove %s");
35
36 static int clean_use_color = -1;
37 static char clean_colors[][COLOR_MAXLEN] = {
38         GIT_COLOR_RESET,
39         GIT_COLOR_NORMAL,       /* PLAIN */
40         GIT_COLOR_BOLD_BLUE,    /* PROMPT */
41         GIT_COLOR_BOLD,         /* HEADER */
42         GIT_COLOR_BOLD_RED,     /* HELP */
43         GIT_COLOR_BOLD_RED,     /* ERROR */
44 };
45 enum color_clean {
46         CLEAN_COLOR_RESET = 0,
47         CLEAN_COLOR_PLAIN = 1,
48         CLEAN_COLOR_PROMPT = 2,
49         CLEAN_COLOR_HEADER = 3,
50         CLEAN_COLOR_HELP = 4,
51         CLEAN_COLOR_ERROR = 5,
52 };
53
54 #define MENU_OPTS_SINGLETON             01
55 #define MENU_OPTS_IMMEDIATE             02
56 #define MENU_OPTS_LIST_ONLY             04
57
58 struct menu_opts {
59         const char *header;
60         const char *prompt;
61         int flags;
62 };
63
64 #define MENU_RETURN_NO_LOOP             10
65
66 struct menu_item {
67         char hotkey;
68         const char *title;
69         int selected;
70         int (*fn)();
71 };
72
73 enum menu_stuff_type {
74         MENU_STUFF_TYPE_STRING_LIST = 1,
75         MENU_STUFF_TYPE_MENU_ITEM
76 };
77
78 struct menu_stuff {
79         enum menu_stuff_type type;
80         int nr;
81         void *stuff;
82 };
83
84 static int parse_clean_color_slot(const char *var)
85 {
86         if (!strcasecmp(var, "reset"))
87                 return CLEAN_COLOR_RESET;
88         if (!strcasecmp(var, "plain"))
89                 return CLEAN_COLOR_PLAIN;
90         if (!strcasecmp(var, "prompt"))
91                 return CLEAN_COLOR_PROMPT;
92         if (!strcasecmp(var, "header"))
93                 return CLEAN_COLOR_HEADER;
94         if (!strcasecmp(var, "help"))
95                 return CLEAN_COLOR_HELP;
96         if (!strcasecmp(var, "error"))
97                 return CLEAN_COLOR_ERROR;
98         return -1;
99 }
100
101 static int git_clean_config(const char *var, const char *value, void *cb)
102 {
103         if (starts_with(var, "column."))
104                 return git_column_config(var, value, "clean", &colopts);
105
106         /* honors the color.interactive* config variables which also
107            applied in git-add--interactive and git-stash */
108         if (!strcmp(var, "color.interactive")) {
109                 clean_use_color = git_config_colorbool(var, value);
110                 return 0;
111         }
112         if (starts_with(var, "color.interactive.")) {
113                 int slot = parse_clean_color_slot(var +
114                                                   strlen("color.interactive."));
115                 if (slot < 0)
116                         return 0;
117                 if (!value)
118                         return config_error_nonbool(var);
119                 color_parse(value, var, clean_colors[slot]);
120                 return 0;
121         }
122
123         if (!strcmp(var, "clean.requireforce")) {
124                 force = !git_config_bool(var, value);
125                 return 0;
126         }
127
128         /* inspect the color.ui config variable and others */
129         return git_color_default_config(var, value, cb);
130 }
131
132 static const char *clean_get_color(enum color_clean ix)
133 {
134         if (want_color(clean_use_color))
135                 return clean_colors[ix];
136         return "";
137 }
138
139 static void clean_print_color(enum color_clean ix)
140 {
141         printf("%s", clean_get_color(ix));
142 }
143
144 static int exclude_cb(const struct option *opt, const char *arg, int unset)
145 {
146         struct string_list *exclude_list = opt->value;
147         string_list_append(exclude_list, arg);
148         return 0;
149 }
150
151 static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag,
152                 int dry_run, int quiet, int *dir_gone)
153 {
154         DIR *dir;
155         struct strbuf quoted = STRBUF_INIT;
156         struct dirent *e;
157         int res = 0, ret = 0, gone = 1, original_len = path->len, len, i;
158         unsigned char submodule_head[20];
159         struct string_list dels = STRING_LIST_INIT_DUP;
160
161         *dir_gone = 1;
162
163         if ((force_flag & REMOVE_DIR_KEEP_NESTED_GIT) &&
164                         !resolve_gitlink_ref(path->buf, "HEAD", submodule_head)) {
165                 if (!quiet) {
166                         quote_path_relative(path->buf, prefix, &quoted);
167                         printf(dry_run ?  _(msg_would_skip_git_dir) : _(msg_skip_git_dir),
168                                         quoted.buf);
169                 }
170
171                 *dir_gone = 0;
172                 return 0;
173         }
174
175         dir = opendir(path->buf);
176         if (!dir) {
177                 /* an empty dir could be removed even if it is unreadble */
178                 res = dry_run ? 0 : rmdir(path->buf);
179                 if (res) {
180                         quote_path_relative(path->buf, prefix, &quoted);
181                         warning(_(msg_warn_remove_failed), quoted.buf);
182                         *dir_gone = 0;
183                 }
184                 return res;
185         }
186
187         if (path->buf[original_len - 1] != '/')
188                 strbuf_addch(path, '/');
189
190         len = path->len;
191         while ((e = readdir(dir)) != NULL) {
192                 struct stat st;
193                 if (is_dot_or_dotdot(e->d_name))
194                         continue;
195
196                 strbuf_setlen(path, len);
197                 strbuf_addstr(path, e->d_name);
198                 if (lstat(path->buf, &st))
199                         ; /* fall thru */
200                 else if (S_ISDIR(st.st_mode)) {
201                         if (remove_dirs(path, prefix, force_flag, dry_run, quiet, &gone))
202                                 ret = 1;
203                         if (gone) {
204                                 quote_path_relative(path->buf, prefix, &quoted);
205                                 string_list_append(&dels, quoted.buf);
206                         } else
207                                 *dir_gone = 0;
208                         continue;
209                 } else {
210                         res = dry_run ? 0 : unlink(path->buf);
211                         if (!res) {
212                                 quote_path_relative(path->buf, prefix, &quoted);
213                                 string_list_append(&dels, quoted.buf);
214                         } else {
215                                 quote_path_relative(path->buf, prefix, &quoted);
216                                 warning(_(msg_warn_remove_failed), quoted.buf);
217                                 *dir_gone = 0;
218                                 ret = 1;
219                         }
220                         continue;
221                 }
222
223                 /* path too long, stat fails, or non-directory still exists */
224                 *dir_gone = 0;
225                 ret = 1;
226                 break;
227         }
228         closedir(dir);
229
230         strbuf_setlen(path, original_len);
231
232         if (*dir_gone) {
233                 res = dry_run ? 0 : rmdir(path->buf);
234                 if (!res)
235                         *dir_gone = 1;
236                 else {
237                         quote_path_relative(path->buf, prefix, &quoted);
238                         warning(_(msg_warn_remove_failed), quoted.buf);
239                         *dir_gone = 0;
240                         ret = 1;
241                 }
242         }
243
244         if (!*dir_gone && !quiet) {
245                 for (i = 0; i < dels.nr; i++)
246                         printf(dry_run ?  _(msg_would_remove) : _(msg_remove), dels.items[i].string);
247         }
248         string_list_clear(&dels, 0);
249         return ret;
250 }
251
252 static void pretty_print_dels(void)
253 {
254         struct string_list list = STRING_LIST_INIT_DUP;
255         struct string_list_item *item;
256         struct strbuf buf = STRBUF_INIT;
257         const char *qname;
258         struct column_options copts;
259
260         for_each_string_list_item(item, &del_list) {
261                 qname = quote_path_relative(item->string, NULL, &buf);
262                 string_list_append(&list, qname);
263         }
264
265         /*
266          * always enable column display, we only consult column.*
267          * about layout strategy and stuff
268          */
269         colopts = (colopts & ~COL_ENABLE_MASK) | COL_ENABLED;
270         memset(&copts, 0, sizeof(copts));
271         copts.indent = "  ";
272         copts.padding = 2;
273         print_columns(&list, colopts, &copts);
274         strbuf_release(&buf);
275         string_list_clear(&list, 0);
276 }
277
278 static void pretty_print_menus(struct string_list *menu_list)
279 {
280         unsigned int local_colopts = 0;
281         struct column_options copts;
282
283         local_colopts = COL_ENABLED | COL_ROW;
284         memset(&copts, 0, sizeof(copts));
285         copts.indent = "  ";
286         copts.padding = 2;
287         print_columns(menu_list, local_colopts, &copts);
288 }
289
290 static void prompt_help_cmd(int singleton)
291 {
292         clean_print_color(CLEAN_COLOR_HELP);
293         printf_ln(singleton ?
294                   _("Prompt help:\n"
295                     "1          - select a numbered item\n"
296                     "foo        - select item based on unique prefix\n"
297                     "           - (empty) select nothing") :
298                   _("Prompt help:\n"
299                     "1          - select a single item\n"
300                     "3-5        - select a range of items\n"
301                     "2-3,6-9    - select multiple ranges\n"
302                     "foo        - select item based on unique prefix\n"
303                     "-...       - unselect specified items\n"
304                     "*          - choose all items\n"
305                     "           - (empty) finish selecting"));
306         clean_print_color(CLEAN_COLOR_RESET);
307 }
308
309 /*
310  * display menu stuff with number prefix and hotkey highlight
311  */
312 static void print_highlight_menu_stuff(struct menu_stuff *stuff, int **chosen)
313 {
314         struct string_list menu_list = STRING_LIST_INIT_DUP;
315         struct strbuf menu = STRBUF_INIT;
316         struct strbuf buf = STRBUF_INIT;
317         struct menu_item *menu_item;
318         struct string_list_item *string_list_item;
319         int i;
320
321         switch (stuff->type) {
322         default:
323                 die("Bad type of menu_staff when print menu");
324         case MENU_STUFF_TYPE_MENU_ITEM:
325                 menu_item = (struct menu_item *)stuff->stuff;
326                 for (i = 0; i < stuff->nr; i++, menu_item++) {
327                         const char *p;
328                         int highlighted = 0;
329
330                         p = menu_item->title;
331                         if ((*chosen)[i] < 0)
332                                 (*chosen)[i] = menu_item->selected ? 1 : 0;
333                         strbuf_addf(&menu, "%s%2d: ", (*chosen)[i] ? "*" : " ", i+1);
334                         for (; *p; p++) {
335                                 if (!highlighted && *p == menu_item->hotkey) {
336                                         strbuf_addstr(&menu, clean_get_color(CLEAN_COLOR_PROMPT));
337                                         strbuf_addch(&menu, *p);
338                                         strbuf_addstr(&menu, clean_get_color(CLEAN_COLOR_RESET));
339                                         highlighted = 1;
340                                 } else {
341                                         strbuf_addch(&menu, *p);
342                                 }
343                         }
344                         string_list_append(&menu_list, menu.buf);
345                         strbuf_reset(&menu);
346                 }
347                 break;
348         case MENU_STUFF_TYPE_STRING_LIST:
349                 i = 0;
350                 for_each_string_list_item(string_list_item, (struct string_list *)stuff->stuff) {
351                         if ((*chosen)[i] < 0)
352                                 (*chosen)[i] = 0;
353                         strbuf_addf(&menu, "%s%2d: %s",
354                                     (*chosen)[i] ? "*" : " ", i+1, string_list_item->string);
355                         string_list_append(&menu_list, menu.buf);
356                         strbuf_reset(&menu);
357                         i++;
358                 }
359                 break;
360         }
361
362         pretty_print_menus(&menu_list);
363
364         strbuf_release(&menu);
365         strbuf_release(&buf);
366         string_list_clear(&menu_list, 0);
367 }
368
369 static int find_unique(const char *choice, struct menu_stuff *menu_stuff)
370 {
371         struct menu_item *menu_item;
372         struct string_list_item *string_list_item;
373         int i, len, found = 0;
374
375         len = strlen(choice);
376         switch (menu_stuff->type) {
377         default:
378                 die("Bad type of menu_stuff when parse choice");
379         case MENU_STUFF_TYPE_MENU_ITEM:
380
381                 menu_item = (struct menu_item *)menu_stuff->stuff;
382                 for (i = 0; i < menu_stuff->nr; i++, menu_item++) {
383                         if (len == 1 && *choice == menu_item->hotkey) {
384                                 found = i + 1;
385                                 break;
386                         }
387                         if (!strncasecmp(choice, menu_item->title, len)) {
388                                 if (found) {
389                                         if (len == 1) {
390                                                 /* continue for hotkey matching */
391                                                 found = -1;
392                                         } else {
393                                                 found = 0;
394                                                 break;
395                                         }
396                                 } else {
397                                         found = i + 1;
398                                 }
399                         }
400                 }
401                 break;
402         case MENU_STUFF_TYPE_STRING_LIST:
403                 string_list_item = ((struct string_list *)menu_stuff->stuff)->items;
404                 for (i = 0; i < menu_stuff->nr; i++, string_list_item++) {
405                         if (!strncasecmp(choice, string_list_item->string, len)) {
406                                 if (found) {
407                                         found = 0;
408                                         break;
409                                 }
410                                 found = i + 1;
411                         }
412                 }
413                 break;
414         }
415         return found;
416 }
417
418
419 /*
420  * Parse user input, and return choice(s) for menu (menu_stuff).
421  *
422  * Input
423  *     (for single choice)
424  *         1          - select a numbered item
425  *         foo        - select item based on menu title
426  *                    - (empty) select nothing
427  *
428  *     (for multiple choice)
429  *         1          - select a single item
430  *         3-5        - select a range of items
431  *         2-3,6-9    - select multiple ranges
432  *         foo        - select item based on menu title
433  *         -...       - unselect specified items
434  *         *          - choose all items
435  *                    - (empty) finish selecting
436  *
437  * The parse result will be saved in array **chosen, and
438  * return number of total selections.
439  */
440 static int parse_choice(struct menu_stuff *menu_stuff,
441                         int is_single,
442                         struct strbuf input,
443                         int **chosen)
444 {
445         struct strbuf **choice_list, **ptr;
446         int nr = 0;
447         int i;
448
449         if (is_single) {
450                 choice_list = strbuf_split_max(&input, '\n', 0);
451         } else {
452                 char *p = input.buf;
453                 do {
454                         if (*p == ',')
455                                 *p = ' ';
456                 } while (*p++);
457                 choice_list = strbuf_split_max(&input, ' ', 0);
458         }
459
460         for (ptr = choice_list; *ptr; ptr++) {
461                 char *p;
462                 int choose = 1;
463                 int bottom = 0, top = 0;
464                 int is_range, is_number;
465
466                 strbuf_trim(*ptr);
467                 if (!(*ptr)->len)
468                         continue;
469
470                 /* Input that begins with '-'; unchoose */
471                 if (*(*ptr)->buf == '-') {
472                         choose = 0;
473                         strbuf_remove((*ptr), 0, 1);
474                 }
475
476                 is_range = 0;
477                 is_number = 1;
478                 for (p = (*ptr)->buf; *p; p++) {
479                         if ('-' == *p) {
480                                 if (!is_range) {
481                                         is_range = 1;
482                                         is_number = 0;
483                                 } else {
484                                         is_number = 0;
485                                         is_range = 0;
486                                         break;
487                                 }
488                         } else if (!isdigit(*p)) {
489                                 is_number = 0;
490                                 is_range = 0;
491                                 break;
492                         }
493                 }
494
495                 if (is_number) {
496                         bottom = atoi((*ptr)->buf);
497                         top = bottom;
498                 } else if (is_range) {
499                         bottom = atoi((*ptr)->buf);
500                         /* a range can be specified like 5-7 or 5- */
501                         if (!*(strchr((*ptr)->buf, '-') + 1))
502                                 top = menu_stuff->nr;
503                         else
504                                 top = atoi(strchr((*ptr)->buf, '-') + 1);
505                 } else if (!strcmp((*ptr)->buf, "*")) {
506                         bottom = 1;
507                         top = menu_stuff->nr;
508                 } else {
509                         bottom = find_unique((*ptr)->buf, menu_stuff);
510                         top = bottom;
511                 }
512
513                 if (top <= 0 || bottom <= 0 || top > menu_stuff->nr || bottom > top ||
514                     (is_single && bottom != top)) {
515                         clean_print_color(CLEAN_COLOR_ERROR);
516                         printf_ln(_("Huh (%s)?"), (*ptr)->buf);
517                         clean_print_color(CLEAN_COLOR_RESET);
518                         continue;
519                 }
520
521                 for (i = bottom; i <= top; i++)
522                         (*chosen)[i-1] = choose;
523         }
524
525         strbuf_list_free(choice_list);
526
527         for (i = 0; i < menu_stuff->nr; i++)
528                 nr += (*chosen)[i];
529         return nr;
530 }
531
532 /*
533  * Implement a git-add-interactive compatible UI, which is borrowed
534  * from git-add--interactive.perl.
535  *
536  * Return value:
537  *
538  *   - Return an array of integers
539  *   - , and it is up to you to free the allocated memory.
540  *   - The array ends with EOF.
541  *   - If user pressed CTRL-D (i.e. EOF), no selection returned.
542  */
543 static int *list_and_choose(struct menu_opts *opts, struct menu_stuff *stuff)
544 {
545         struct strbuf choice = STRBUF_INIT;
546         int *chosen, *result;
547         int nr = 0;
548         int eof = 0;
549         int i;
550
551         chosen = xmalloc(sizeof(int) * stuff->nr);
552         /* set chosen as uninitialized */
553         for (i = 0; i < stuff->nr; i++)
554                 chosen[i] = -1;
555
556         for (;;) {
557                 if (opts->header) {
558                         printf_ln("%s%s%s",
559                                   clean_get_color(CLEAN_COLOR_HEADER),
560                                   _(opts->header),
561                                   clean_get_color(CLEAN_COLOR_RESET));
562                 }
563
564                 /* chosen will be initialized by print_highlight_menu_stuff */
565                 print_highlight_menu_stuff(stuff, &chosen);
566
567                 if (opts->flags & MENU_OPTS_LIST_ONLY)
568                         break;
569
570                 if (opts->prompt) {
571                         printf("%s%s%s%s",
572                                clean_get_color(CLEAN_COLOR_PROMPT),
573                                _(opts->prompt),
574                                opts->flags & MENU_OPTS_SINGLETON ? "> " : ">> ",
575                                clean_get_color(CLEAN_COLOR_RESET));
576                 }
577
578                 if (strbuf_getline(&choice, stdin, '\n') != EOF) {
579                         strbuf_trim(&choice);
580                 } else {
581                         eof = 1;
582                         break;
583                 }
584
585                 /* help for prompt */
586                 if (!strcmp(choice.buf, "?")) {
587                         prompt_help_cmd(opts->flags & MENU_OPTS_SINGLETON);
588                         continue;
589                 }
590
591                 /* for a multiple-choice menu, press ENTER (empty) will return back */
592                 if (!(opts->flags & MENU_OPTS_SINGLETON) && !choice.len)
593                         break;
594
595                 nr = parse_choice(stuff,
596                                   opts->flags & MENU_OPTS_SINGLETON,
597                                   choice,
598                                   &chosen);
599
600                 if (opts->flags & MENU_OPTS_SINGLETON) {
601                         if (nr)
602                                 break;
603                 } else if (opts->flags & MENU_OPTS_IMMEDIATE) {
604                         break;
605                 }
606         }
607
608         if (eof) {
609                 result = xmalloc(sizeof(int));
610                 *result = EOF;
611         } else {
612                 int j = 0;
613
614                 /*
615                  * recalculate nr, if return back from menu directly with
616                  * default selections.
617                  */
618                 if (!nr) {
619                         for (i = 0; i < stuff->nr; i++)
620                                 nr += chosen[i];
621                 }
622
623                 result = xmalloc(sizeof(int) * (nr + 1));
624                 memset(result, 0, sizeof(int) * (nr + 1));
625                 for (i = 0; i < stuff->nr && j < nr; i++) {
626                         if (chosen[i])
627                                 result[j++] = i;
628                 }
629                 result[j] = EOF;
630         }
631
632         free(chosen);
633         strbuf_release(&choice);
634         return result;
635 }
636
637 static int clean_cmd(void)
638 {
639         return MENU_RETURN_NO_LOOP;
640 }
641
642 static int filter_by_patterns_cmd(void)
643 {
644         struct dir_struct dir;
645         struct strbuf confirm = STRBUF_INIT;
646         struct strbuf **ignore_list;
647         struct string_list_item *item;
648         struct exclude_list *el;
649         int changed = -1, i;
650
651         for (;;) {
652                 if (!del_list.nr)
653                         break;
654
655                 if (changed)
656                         pretty_print_dels();
657
658                 clean_print_color(CLEAN_COLOR_PROMPT);
659                 printf(_("Input ignore patterns>> "));
660                 clean_print_color(CLEAN_COLOR_RESET);
661                 if (strbuf_getline(&confirm, stdin, '\n') != EOF)
662                         strbuf_trim(&confirm);
663                 else
664                         putchar('\n');
665
666                 /* quit filter_by_pattern mode if press ENTER or Ctrl-D */
667                 if (!confirm.len)
668                         break;
669
670                 memset(&dir, 0, sizeof(dir));
671                 el = add_exclude_list(&dir, EXC_CMDL, "manual exclude");
672                 ignore_list = strbuf_split_max(&confirm, ' ', 0);
673
674                 for (i = 0; ignore_list[i]; i++) {
675                         strbuf_trim(ignore_list[i]);
676                         if (!ignore_list[i]->len)
677                                 continue;
678
679                         add_exclude(ignore_list[i]->buf, "", 0, el, -(i+1));
680                 }
681
682                 changed = 0;
683                 for_each_string_list_item(item, &del_list) {
684                         int dtype = DT_UNKNOWN;
685
686                         if (is_excluded(&dir, item->string, &dtype)) {
687                                 *item->string = '\0';
688                                 changed++;
689                         }
690                 }
691
692                 if (changed) {
693                         string_list_remove_empty_items(&del_list, 0);
694                 } else {
695                         clean_print_color(CLEAN_COLOR_ERROR);
696                         printf_ln(_("WARNING: Cannot find items matched by: %s"), confirm.buf);
697                         clean_print_color(CLEAN_COLOR_RESET);
698                 }
699
700                 strbuf_list_free(ignore_list);
701                 clear_directory(&dir);
702         }
703
704         strbuf_release(&confirm);
705         return 0;
706 }
707
708 static int select_by_numbers_cmd(void)
709 {
710         struct menu_opts menu_opts;
711         struct menu_stuff menu_stuff;
712         struct string_list_item *items;
713         int *chosen;
714         int i, j;
715
716         menu_opts.header = NULL;
717         menu_opts.prompt = N_("Select items to delete");
718         menu_opts.flags = 0;
719
720         menu_stuff.type = MENU_STUFF_TYPE_STRING_LIST;
721         menu_stuff.stuff = &del_list;
722         menu_stuff.nr = del_list.nr;
723
724         chosen = list_and_choose(&menu_opts, &menu_stuff);
725         items = del_list.items;
726         for (i = 0, j = 0; i < del_list.nr; i++) {
727                 if (i < chosen[j]) {
728                         *(items[i].string) = '\0';
729                 } else if (i == chosen[j]) {
730                         /* delete selected item */
731                         j++;
732                         continue;
733                 } else {
734                         /* end of chosen (chosen[j] == EOF), won't delete */
735                         *(items[i].string) = '\0';
736                 }
737         }
738
739         string_list_remove_empty_items(&del_list, 0);
740
741         free(chosen);
742         return 0;
743 }
744
745 static int ask_each_cmd(void)
746 {
747         struct strbuf confirm = STRBUF_INIT;
748         struct strbuf buf = STRBUF_INIT;
749         struct string_list_item *item;
750         const char *qname;
751         int changed = 0, eof = 0;
752
753         for_each_string_list_item(item, &del_list) {
754                 /* Ctrl-D should stop removing files */
755                 if (!eof) {
756                         qname = quote_path_relative(item->string, NULL, &buf);
757                         printf(_("remove %s? "), qname);
758                         if (strbuf_getline(&confirm, stdin, '\n') != EOF) {
759                                 strbuf_trim(&confirm);
760                         } else {
761                                 putchar('\n');
762                                 eof = 1;
763                         }
764                 }
765                 if (!confirm.len || strncasecmp(confirm.buf, "yes", confirm.len)) {
766                         *item->string = '\0';
767                         changed++;
768                 }
769         }
770
771         if (changed)
772                 string_list_remove_empty_items(&del_list, 0);
773
774         strbuf_release(&buf);
775         strbuf_release(&confirm);
776         return MENU_RETURN_NO_LOOP;
777 }
778
779 static int quit_cmd(void)
780 {
781         string_list_clear(&del_list, 0);
782         printf_ln(_("Bye."));
783         return MENU_RETURN_NO_LOOP;
784 }
785
786 static int help_cmd(void)
787 {
788         clean_print_color(CLEAN_COLOR_HELP);
789         printf_ln(_(
790                     "clean               - start cleaning\n"
791                     "filter by pattern   - exclude items from deletion\n"
792                     "select by numbers   - select items to be deleted by numbers\n"
793                     "ask each            - confirm each deletion (like \"rm -i\")\n"
794                     "quit                - stop cleaning\n"
795                     "help                - this screen\n"
796                     "?                   - help for prompt selection"
797                    ));
798         clean_print_color(CLEAN_COLOR_RESET);
799         return 0;
800 }
801
802 static void interactive_main_loop(void)
803 {
804         while (del_list.nr) {
805                 struct menu_opts menu_opts;
806                 struct menu_stuff menu_stuff;
807                 struct menu_item menus[] = {
808                         {'c', "clean",                  0, clean_cmd},
809                         {'f', "filter by pattern",      0, filter_by_patterns_cmd},
810                         {'s', "select by numbers",      0, select_by_numbers_cmd},
811                         {'a', "ask each",               0, ask_each_cmd},
812                         {'q', "quit",                   0, quit_cmd},
813                         {'h', "help",                   0, help_cmd},
814                 };
815                 int *chosen;
816
817                 menu_opts.header = N_("*** Commands ***");
818                 menu_opts.prompt = N_("What now");
819                 menu_opts.flags = MENU_OPTS_SINGLETON;
820
821                 menu_stuff.type = MENU_STUFF_TYPE_MENU_ITEM;
822                 menu_stuff.stuff = menus;
823                 menu_stuff.nr = sizeof(menus) / sizeof(struct menu_item);
824
825                 clean_print_color(CLEAN_COLOR_HEADER);
826                 printf_ln(Q_("Would remove the following item:",
827                              "Would remove the following items:",
828                              del_list.nr));
829                 clean_print_color(CLEAN_COLOR_RESET);
830
831                 pretty_print_dels();
832
833                 chosen = list_and_choose(&menu_opts, &menu_stuff);
834
835                 if (*chosen != EOF) {
836                         int ret;
837                         ret = menus[*chosen].fn();
838                         if (ret != MENU_RETURN_NO_LOOP) {
839                                 free(chosen);
840                                 chosen = NULL;
841                                 if (!del_list.nr) {
842                                         clean_print_color(CLEAN_COLOR_ERROR);
843                                         printf_ln(_("No more files to clean, exiting."));
844                                         clean_print_color(CLEAN_COLOR_RESET);
845                                         break;
846                                 }
847                                 continue;
848                         }
849                 } else {
850                         quit_cmd();
851                 }
852
853                 free(chosen);
854                 chosen = NULL;
855                 break;
856         }
857 }
858
859 int cmd_clean(int argc, const char **argv, const char *prefix)
860 {
861         int i, res;
862         int dry_run = 0, remove_directories = 0, quiet = 0, ignored = 0;
863         int ignored_only = 0, config_set = 0, errors = 0, gone = 1;
864         int rm_flags = REMOVE_DIR_KEEP_NESTED_GIT;
865         struct strbuf abs_path = STRBUF_INIT;
866         struct dir_struct dir;
867         struct pathspec pathspec;
868         struct strbuf buf = STRBUF_INIT;
869         struct string_list exclude_list = STRING_LIST_INIT_NODUP;
870         struct exclude_list *el;
871         struct string_list_item *item;
872         const char *qname;
873         struct option options[] = {
874                 OPT__QUIET(&quiet, N_("do not print names of files removed")),
875                 OPT__DRY_RUN(&dry_run, N_("dry run")),
876                 OPT__FORCE(&force, N_("force")),
877                 OPT_BOOL('i', "interactive", &interactive, N_("interactive cleaning")),
878                 OPT_BOOL('d', NULL, &remove_directories,
879                                 N_("remove whole directories")),
880                 { OPTION_CALLBACK, 'e', "exclude", &exclude_list, N_("pattern"),
881                   N_("add <pattern> to ignore rules"), PARSE_OPT_NONEG, exclude_cb },
882                 OPT_BOOL('x', NULL, &ignored, N_("remove ignored files, too")),
883                 OPT_BOOL('X', NULL, &ignored_only,
884                                 N_("remove only ignored files")),
885                 OPT_END()
886         };
887
888         git_config(git_clean_config, NULL);
889         if (force < 0)
890                 force = 0;
891         else
892                 config_set = 1;
893
894         argc = parse_options(argc, argv, prefix, options, builtin_clean_usage,
895                              0);
896
897         memset(&dir, 0, sizeof(dir));
898         if (ignored_only)
899                 dir.flags |= DIR_SHOW_IGNORED;
900
901         if (ignored && ignored_only)
902                 die(_("-x and -X cannot be used together"));
903
904         if (!interactive && !dry_run && !force) {
905                 if (config_set)
906                         die(_("clean.requireForce set to true and neither -i, -n nor -f given; "
907                                   "refusing to clean"));
908                 else
909                         die(_("clean.requireForce defaults to true and neither -i, -n nor -f given; "
910                                   "refusing to clean"));
911         }
912
913         if (force > 1)
914                 rm_flags = 0;
915
916         dir.flags |= DIR_SHOW_OTHER_DIRECTORIES;
917
918         if (read_cache() < 0)
919                 die(_("index file corrupt"));
920
921         if (!ignored)
922                 setup_standard_excludes(&dir);
923
924         el = add_exclude_list(&dir, EXC_CMDL, "--exclude option");
925         for (i = 0; i < exclude_list.nr; i++)
926                 add_exclude(exclude_list.items[i].string, "", 0, el, -(i+1));
927
928         parse_pathspec(&pathspec, 0,
929                        PATHSPEC_PREFER_CWD,
930                        prefix, argv);
931
932         fill_directory(&dir, &pathspec);
933
934         for (i = 0; i < dir.nr; i++) {
935                 struct dir_entry *ent = dir.entries[i];
936                 int matches = 0;
937                 struct stat st;
938                 const char *rel;
939
940                 if (!cache_name_is_other(ent->name, ent->len))
941                         continue;
942
943                 if (lstat(ent->name, &st))
944                         die_errno("Cannot lstat '%s'", ent->name);
945
946                 if (pathspec.nr)
947                         matches = dir_path_match(ent, &pathspec, 0, NULL);
948
949                 if (pathspec.nr && !matches)
950                         continue;
951
952                 if (S_ISDIR(st.st_mode) && !remove_directories &&
953                     matches != MATCHED_EXACTLY)
954                         continue;
955
956                 rel = relative_path(ent->name, prefix, &buf);
957                 string_list_append(&del_list, rel);
958         }
959
960         if (interactive && del_list.nr > 0)
961                 interactive_main_loop();
962
963         for_each_string_list_item(item, &del_list) {
964                 struct stat st;
965
966                 if (prefix)
967                         strbuf_addstr(&abs_path, prefix);
968
969                 strbuf_addstr(&abs_path, item->string);
970
971                 /*
972                  * we might have removed this as part of earlier
973                  * recursive directory removal, so lstat() here could
974                  * fail with ENOENT.
975                  */
976                 if (lstat(abs_path.buf, &st))
977                         continue;
978
979                 if (S_ISDIR(st.st_mode)) {
980                         if (remove_dirs(&abs_path, prefix, rm_flags, dry_run, quiet, &gone))
981                                 errors++;
982                         if (gone && !quiet) {
983                                 qname = quote_path_relative(item->string, NULL, &buf);
984                                 printf(dry_run ? _(msg_would_remove) : _(msg_remove), qname);
985                         }
986                 } else {
987                         res = dry_run ? 0 : unlink(abs_path.buf);
988                         if (res) {
989                                 qname = quote_path_relative(item->string, NULL, &buf);
990                                 warning(_(msg_warn_remove_failed), qname);
991                                 errors++;
992                         } else if (!quiet) {
993                                 qname = quote_path_relative(item->string, NULL, &buf);
994                                 printf(dry_run ? _(msg_would_remove) : _(msg_remove), qname);
995                         }
996                 }
997                 strbuf_reset(&abs_path);
998         }
999
1000         strbuf_release(&abs_path);
1001         strbuf_release(&buf);
1002         string_list_clear(&del_list, 0);
1003         string_list_clear(&exclude_list, 0);
1004         return (errors != 0);
1005 }