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 }