Merge branch 'hb/git-pm-tempfile'
[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;
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 null_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_BOOLEAN(0, "stdin", &stdin_paths,
22                     N_("read file names from stdin")),
23         OPT_BOOLEAN('z', NULL, &null_term_line,
24                     N_("input paths are terminated by a null character")),
25         OPT_END()
26 };
27
28 static void output_exclude(const char *path, struct exclude *exclude)
29 {
30         char *bang  = exclude->flags & EXC_FLAG_NEGATIVE  ? "!" : "";
31         char *slash = exclude->flags & EXC_FLAG_MUSTBEDIR ? "/" : "";
32         if (!null_term_line) {
33                 if (!verbose) {
34                         write_name_quoted(path, stdout, '\n');
35                 } else {
36                         quote_c_style(exclude->el->src, NULL, stdout, 0);
37                         printf(":%d:%s%s%s\t",
38                                exclude->srcpos,
39                                bang, exclude->pattern, slash);
40                         quote_c_style(path, NULL, stdout, 0);
41                         fputc('\n', stdout);
42                 }
43         } else {
44                 if (!verbose) {
45                         printf("%s%c", path, '\0');
46                 } else {
47                         printf("%s%c%d%c%s%s%s%c%s%c",
48                                exclude->el->src, '\0',
49                                exclude->srcpos, '\0',
50                                bang, exclude->pattern, slash, '\0',
51                                path, '\0');
52                 }
53         }
54 }
55
56 static int check_ignore(const char *prefix, const char **pathspec)
57 {
58         struct dir_struct dir;
59         const char *path, *full_path;
60         char *seen;
61         int num_ignored = 0, dtype = DT_UNKNOWN, i;
62         struct exclude *exclude;
63
64         /* read_cache() is only necessary so we can watch out for submodules. */
65         if (read_cache() < 0)
66                 die(_("index file corrupt"));
67
68         memset(&dir, 0, sizeof(dir));
69         setup_standard_excludes(&dir);
70
71         if (!pathspec || !*pathspec) {
72                 if (!quiet)
73                         fprintf(stderr, "no pathspec given.\n");
74                 return 0;
75         }
76
77         /*
78          * look for pathspecs matching entries in the index, since these
79          * should not be ignored, in order to be consistent with
80          * 'git status', 'git add' etc.
81          */
82         seen = find_pathspecs_matching_against_index(pathspec);
83         for (i = 0; pathspec[i]; i++) {
84                 path = pathspec[i];
85                 full_path = prefix_path(prefix, prefix
86                                         ? strlen(prefix) : 0, path);
87                 full_path = check_path_for_gitlink(full_path);
88                 die_if_path_beyond_symlink(full_path, prefix);
89                 if (!seen[i]) {
90                         exclude = last_exclude_matching(&dir, full_path, &dtype);
91                         if (exclude) {
92                                 if (!quiet)
93                                         output_exclude(path, exclude);
94                                 num_ignored++;
95                         }
96                 }
97         }
98         free(seen);
99         clear_directory(&dir);
100
101         return num_ignored;
102 }
103
104 static int check_ignore_stdin_paths(const char *prefix)
105 {
106         struct strbuf buf, nbuf;
107         char **pathspec = NULL;
108         size_t nr = 0, alloc = 0;
109         int line_termination = null_term_line ? 0 : '\n';
110         int num_ignored;
111
112         strbuf_init(&buf, 0);
113         strbuf_init(&nbuf, 0);
114         while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
115                 if (line_termination && buf.buf[0] == '"') {
116                         strbuf_reset(&nbuf);
117                         if (unquote_c_style(&nbuf, buf.buf, NULL))
118                                 die("line is badly quoted");
119                         strbuf_swap(&buf, &nbuf);
120                 }
121                 ALLOC_GROW(pathspec, nr + 1, alloc);
122                 pathspec[nr] = xcalloc(strlen(buf.buf) + 1, sizeof(*buf.buf));
123                 strcpy(pathspec[nr++], buf.buf);
124         }
125         ALLOC_GROW(pathspec, nr + 1, alloc);
126         pathspec[nr] = NULL;
127         num_ignored = check_ignore(prefix, (const char **)pathspec);
128         maybe_flush_or_die(stdout, "attribute to stdout");
129         strbuf_release(&buf);
130         strbuf_release(&nbuf);
131         free(pathspec);
132         return num_ignored;
133 }
134
135 int cmd_check_ignore(int argc, const char **argv, const char *prefix)
136 {
137         int num_ignored;
138
139         git_config(git_default_config, NULL);
140
141         argc = parse_options(argc, argv, prefix, check_ignore_options,
142                              check_ignore_usage, 0);
143
144         if (stdin_paths) {
145                 if (argc > 0)
146                         die(_("cannot specify pathnames with --stdin"));
147         } else {
148                 if (null_term_line)
149                         die(_("-z only makes sense with --stdin"));
150                 if (argc == 0)
151                         die(_("no path specified"));
152         }
153         if (quiet) {
154                 if (argc > 1)
155                         die(_("--quiet is only valid with a single pathname"));
156                 if (verbose)
157                         die(_("cannot have both --quiet and --verbose"));
158         }
159
160         if (stdin_paths) {
161                 num_ignored = check_ignore_stdin_paths(prefix);
162         } else {
163                 num_ignored = check_ignore(prefix, argv);
164                 maybe_flush_or_die(stdout, "ignore to stdout");
165         }
166
167         return !num_ignored;
168 }