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;
   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_BOOLEAN('n', "non-matching", &show_non_matching,
  26                     N_("show non-matching input paths")),
  27         OPT_END()
  28 };
  29
  30 static void output_exclude(const char *path, struct exclude *exclude)
  31 {
  32         char *bang  = (exclude && exclude->flags & EXC_FLAG_NEGATIVE)  ? "!" : "";
  33         char *slash = (exclude && exclude->flags & EXC_FLAG_MUSTBEDIR) ? "/" : "";
  34         if (!null_term_line) {
  35                 if (!verbose) {
  36                         write_name_quoted(path, stdout, '\n');
  37                 } else {
  38                         if (exclude) {
  39                                 quote_c_style(exclude->el->src, NULL, stdout, 0);
  40                                 printf(":%d:%s%s%s\t",
  41                                        exclude->srcpos,
  42                                        bang, exclude->pattern, slash);
  43                         }
  44                         else {
  45                                 printf("::\t");
  46                         }
  47                         quote_c_style(path, NULL, stdout, 0);
  48                         fputc('\n', stdout);
  49                 }
  50         } else {
  51                 if (!verbose) {
  52                         printf("%s%c", path, '\0');
  53                 } else {
  54                         if (exclude)
  55                                 printf("%s%c%d%c%s%s%s%c%s%c",
  56                                        exclude->el->src, '\0',
  57                                        exclude->srcpos, '\0',
  58                                        bang, exclude->pattern, slash, '\0',
  59                                        path, '\0');
  60                         else
  61                                 printf("%c%c%c%s%c", '\0', '\0', '\0', path, '\0');
  62                 }
  63         }
  64 }
  65
  66 static int check_ignore(struct dir_struct *dir,
  67                         const char *prefix, const char **pathspec)
  68 {
  69         const char *path, *full_path;
  70         char *seen;
  71         int num_ignored = 0, dtype = DT_UNKNOWN, i;
  72         struct exclude *exclude;
  73
  74         if (!pathspec || !*pathspec) {
  75                 if (!quiet)
  76                         fprintf(stderr, "no pathspec given.\n");
  77                 return 0;
  78         }
  79
  80         /*
  81          * look for pathspecs matching entries in the index, since these
  82          * should not be ignored, in order to be consistent with
  83          * 'git status', 'git add' etc.
  84          */
  85         seen = find_pathspecs_matching_against_index(pathspec);
  86         for (i = 0; pathspec[i]; i++) {
  87                 path = pathspec[i];
  88                 full_path = prefix_path(prefix, prefix
  89                                         ? strlen(prefix) : 0, path);
  90                 full_path = check_path_for_gitlink(full_path);
  91                 die_if_path_beyond_symlink(full_path, prefix);
  92                 exclude = NULL;
  93                 if (!seen[i]) {
  94                         exclude = last_exclude_matching(dir, full_path, &dtype);
  95                 }
  96                 if (!quiet && (exclude || show_non_matching))
  97                         output_exclude(path, exclude);
  98                 if (exclude)
  99                         num_ignored++;
 100         }
 101         free(seen);
 102
 103         return num_ignored;
 104 }
 105
 106 static int check_ignore_stdin_paths(struct dir_struct *dir, const char *prefix)
 107 {
 108         struct strbuf buf, nbuf;
 109         char *pathspec[2] = { NULL, NULL };
 110         int line_termination = null_term_line ? 0 : '\n';
 111         int num_ignored = 0;
 112
 113         strbuf_init(&buf, 0);
 114         strbuf_init(&nbuf, 0);
 115         while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
 116                 if (line_termination && buf.buf[0] == '"') {
 117                         strbuf_reset(&nbuf);
 118                         if (unquote_c_style(&nbuf, buf.buf, NULL))
 119                                 die("line is badly quoted");
 120                         strbuf_swap(&buf, &nbuf);
 121                 }
 122                 pathspec[0] = buf.buf;
 123                 num_ignored += check_ignore(dir, prefix, (const char **)pathspec);
 124                 maybe_flush_or_die(stdout, "check-ignore to stdout");
 125         }
 126         strbuf_release(&buf);
 127         strbuf_release(&nbuf);
 128         return num_ignored;
 129 }
 130
 131 int cmd_check_ignore(int argc, const char **argv, const char *prefix)
 132 {
 133         int num_ignored;
 134         struct dir_struct dir;
 135
 136         git_config(git_default_config, NULL);
 137
 138         argc = parse_options(argc, argv, prefix, check_ignore_options,
 139                              check_ignore_usage, 0);
 140
 141         if (stdin_paths) {
 142                 if (argc > 0)
 143                         die(_("cannot specify pathnames with --stdin"));
 144         } else {
 145                 if (null_term_line)
 146                         die(_("-z only makes sense with --stdin"));
 147                 if (argc == 0)
 148                         die(_("no path specified"));
 149         }
 150         if (quiet) {
 151                 if (argc > 1)
 152                         die(_("--quiet is only valid with a single pathname"));
 153                 if (verbose)
 154                         die(_("cannot have both --quiet and --verbose"));
 155         }
 156         if (show_non_matching && !verbose)
 157                 die(_("--non-matching is only valid with --verbose"));
 158
 159         /* read_cache() is only necessary so we can watch out for submodules. */
 160         if (read_cache() < 0)
 161                 die(_("index file corrupt"));
 162
 163         memset(&dir, 0, sizeof(dir));
 164         setup_standard_excludes(&dir);
 165
 166         if (stdin_paths) {
 167                 num_ignored = check_ignore_stdin_paths(&dir, prefix);
 168         } else {
 169                 num_ignored = check_ignore(&dir, prefix, argv);
 170                 maybe_flush_or_die(stdout, "ignore to stdout");
 171         }
 172
 173         clear_directory(&dir);
 174
 175         return !num_ignored;
 176 }