Merge branch 'ap/path-max'
[git] / builtin / check-ignore.c
1 #include "builtin.h"
2 #include "cache.h"
3 #include "dir.h"
4 #include "quote.h"
5 #include "pathspec.h"
6 #include "parse-options.h"
7
8 static int quiet, verbose, stdin_paths, show_non_matching, no_index;
9 static const char * const check_ignore_usage[] = {
10 "git check-ignore [options] pathname...",
11 "git check-ignore [options] --stdin < <list-of-paths>",
12 NULL
13 };
14
15 static int nul_term_line;
16
17 static const struct option check_ignore_options[] = {
18         OPT__QUIET(&quiet, N_("suppress progress reporting")),
19         OPT__VERBOSE(&verbose, N_("be verbose")),
20         OPT_GROUP(""),
21         OPT_BOOL(0, "stdin", &stdin_paths,
22                  N_("read file names from stdin")),
23         OPT_BOOL('z', NULL, &nul_term_line,
24                  N_("terminate input and output records by a NUL character")),
25         OPT_BOOL('n', "non-matching", &show_non_matching,
26                  N_("show non-matching input paths")),
27         OPT_BOOL(0, "no-index", &no_index,
28                  N_("ignore index when checking")),
29         OPT_END()
30 };
31
32 static void output_exclude(const char *path, struct exclude *exclude)
33 {
34         char *bang  = (exclude && exclude->flags & EXC_FLAG_NEGATIVE)  ? "!" : "";
35         char *slash = (exclude && exclude->flags & EXC_FLAG_MUSTBEDIR) ? "/" : "";
36         if (!nul_term_line) {
37                 if (!verbose) {
38                         write_name_quoted(path, stdout, '\n');
39                 } else {
40                         if (exclude) {
41                                 quote_c_style(exclude->el->src, NULL, stdout, 0);
42                                 printf(":%d:%s%s%s\t",
43                                        exclude->srcpos,
44                                        bang, exclude->pattern, slash);
45                         }
46                         else {
47                                 printf("::\t");
48                         }
49                         quote_c_style(path, NULL, stdout, 0);
50                         fputc('\n', stdout);
51                 }
52         } else {
53                 if (!verbose) {
54                         printf("%s%c", path, '\0');
55                 } else {
56                         if (exclude)
57                                 printf("%s%c%d%c%s%s%s%c%s%c",
58                                        exclude->el->src, '\0',
59                                        exclude->srcpos, '\0',
60                                        bang, exclude->pattern, slash, '\0',
61                                        path, '\0');
62                         else
63                                 printf("%c%c%c%s%c", '\0', '\0', '\0', path, '\0');
64                 }
65         }
66 }
67
68 static int check_ignore(struct dir_struct *dir,
69                         const char *prefix, int argc, const char **argv)
70 {
71         const char *full_path;
72         char *seen;
73         int num_ignored = 0, dtype = DT_UNKNOWN, i;
74         struct exclude *exclude;
75         struct pathspec pathspec;
76
77         if (!argc) {
78                 if (!quiet)
79                         fprintf(stderr, "no pathspec given.\n");
80                 return 0;
81         }
82
83         /*
84          * check-ignore just needs paths. Magic beyond :/ is really
85          * irrelevant.
86          */
87         parse_pathspec(&pathspec,
88                        PATHSPEC_ALL_MAGIC & ~PATHSPEC_FROMTOP,
89                        PATHSPEC_SYMLINK_LEADING_PATH |
90                        PATHSPEC_STRIP_SUBMODULE_SLASH_EXPENSIVE |
91                        PATHSPEC_KEEP_ORDER,
92                        prefix, argv);
93
94         /*
95          * look for pathspecs matching entries in the index, since these
96          * should not be ignored, in order to be consistent with
97          * 'git status', 'git add' etc.
98          */
99         seen = find_pathspecs_matching_against_index(&pathspec);
100         for (i = 0; i < pathspec.nr; i++) {
101                 full_path = pathspec.items[i].match;
102                 exclude = NULL;
103                 if (!seen[i]) {
104                         exclude = last_exclude_matching(dir, full_path, &dtype);
105                 }
106                 if (!quiet && (exclude || show_non_matching))
107                         output_exclude(pathspec.items[i].original, exclude);
108                 if (exclude)
109                         num_ignored++;
110         }
111         free(seen);
112
113         return num_ignored;
114 }
115
116 static int check_ignore_stdin_paths(struct dir_struct *dir, const char *prefix)
117 {
118         struct strbuf buf, nbuf;
119         char *pathspec[2] = { NULL, NULL };
120         int line_termination = nul_term_line ? 0 : '\n';
121         int num_ignored = 0;
122
123         strbuf_init(&buf, 0);
124         strbuf_init(&nbuf, 0);
125         while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
126                 if (line_termination && buf.buf[0] == '"') {
127                         strbuf_reset(&nbuf);
128                         if (unquote_c_style(&nbuf, buf.buf, NULL))
129                                 die("line is badly quoted");
130                         strbuf_swap(&buf, &nbuf);
131                 }
132                 pathspec[0] = buf.buf;
133                 num_ignored += check_ignore(dir, prefix,
134                                             1, (const char **)pathspec);
135                 maybe_flush_or_die(stdout, "check-ignore to stdout");
136         }
137         strbuf_release(&buf);
138         strbuf_release(&nbuf);
139         return num_ignored;
140 }
141
142 int cmd_check_ignore(int argc, const char **argv, const char *prefix)
143 {
144         int num_ignored;
145         struct dir_struct dir;
146
147         git_config(git_default_config, NULL);
148
149         argc = parse_options(argc, argv, prefix, check_ignore_options,
150                              check_ignore_usage, 0);
151
152         if (stdin_paths) {
153                 if (argc > 0)
154                         die(_("cannot specify pathnames with --stdin"));
155         } else {
156                 if (nul_term_line)
157                         die(_("-z only makes sense with --stdin"));
158                 if (argc == 0)
159                         die(_("no path specified"));
160         }
161         if (quiet) {
162                 if (argc > 1)
163                         die(_("--quiet is only valid with a single pathname"));
164                 if (verbose)
165                         die(_("cannot have both --quiet and --verbose"));
166         }
167         if (show_non_matching && !verbose)
168                 die(_("--non-matching is only valid with --verbose"));
169
170         /* read_cache() is only necessary so we can watch out for submodules. */
171         if (!no_index && read_cache() < 0)
172                 die(_("index file corrupt"));
173
174         memset(&dir, 0, sizeof(dir));
175         setup_standard_excludes(&dir);
176
177         if (stdin_paths) {
178                 num_ignored = check_ignore_stdin_paths(&dir, prefix);
179         } else {
180                 num_ignored = check_ignore(&dir, prefix, argc, argv);
181                 maybe_flush_or_die(stdout, "ignore to stdout");
182         }
183
184         clear_directory(&dir);
185
186         return !num_ignored;
187 }