Teach -f <file> option to builtin-grep.
[gitweb.git] / diff-files.c
index b1c05b325a8f171fc67c204471db2cb5e98b0b50..b9d193d506d9e67eb5f0c24905aa6d691ccff301 100644 (file)
  */
 #include "cache.h"
 #include "diff.h"
+#include "commit.h"
+#include "revision.h"
 
 static const char diff_files_usage[] =
 "git-diff-files [-q] [-0/-1/2/3 |-c|--cc] [<common diff options>] [<path>...]"
 COMMON_DIFF_OPTIONS_HELP;
 
-static struct diff_options diff_options;
-static int silent = 0;
-static int diff_unmerged_stage = 2;
-static int combine_merges = 0;
-static int dense_combined_merges = 0;
-
-static void show_unmerge(const char *path)
-{
-       diff_unmerge(&diff_options, path);
-}
-
-static void show_file(int pfx, struct cache_entry *ce)
-{
-       diff_addremove(&diff_options, pfx, ntohl(ce->ce_mode),
-                      ce->sha1, ce->name, NULL);
-}
-
-static void show_modified(int oldmode, int mode,
-                         const unsigned char *old_sha1, const unsigned char *sha1,
-                         char *path)
-{
-       diff_change(&diff_options, oldmode, mode, old_sha1, sha1, path, NULL);
-}
-
 int main(int argc, const char **argv)
 {
-       const char **pathspec;
-       const char *prefix = setup_git_directory();
-       int entries, i;
+       struct rev_info rev;
+       int silent = 0;
 
        git_config(git_diff_config);
-       diff_setup(&diff_options);
+       init_revisions(&rev);
+       rev.abbrev = 0;
+
+       argc = setup_revisions(argc, argv, &rev, NULL);
        while (1 < argc && argv[1][0] == '-') {
-               if (!strcmp(argv[1], "--")) {
-                       argv++;
-                       argc--;
-                       break;
-               }
-               if (!strcmp(argv[1], "-0"))
-                       diff_unmerged_stage = 0;
-               else if (!strcmp(argv[1], "-1"))
-                       diff_unmerged_stage = 1;
-               else if (!strcmp(argv[1], "-2"))
-                       diff_unmerged_stage = 2;
-               else if (!strcmp(argv[1], "-3"))
-                       diff_unmerged_stage = 3;
-               else if (!strcmp(argv[1], "--base"))
-                       diff_unmerged_stage = 1;
+               if (!strcmp(argv[1], "--base"))
+                       rev.max_count = 1;
                else if (!strcmp(argv[1], "--ours"))
-                       diff_unmerged_stage = 2;
+                       rev.max_count = 2;
                else if (!strcmp(argv[1], "--theirs"))
-                       diff_unmerged_stage = 3;
+                       rev.max_count = 3;
                else if (!strcmp(argv[1], "-q"))
                        silent = 1;
-               else if (!strcmp(argv[1], "-r"))
-                       ; /* no-op */
-               else if (!strcmp(argv[1], "-s"))
-                       ; /* no-op */
-               else if (!strcmp(argv[1], "-c"))
-                       combine_merges = 1;
-               else if (!strcmp(argv[1], "--cc"))
-                       dense_combined_merges = combine_merges = 1;
-               else {
-                       int diff_opt_cnt;
-                       diff_opt_cnt = diff_opt_parse(&diff_options,
-                                                     argv+1, argc-1);
-                       if (diff_opt_cnt < 0)
-                               usage(diff_files_usage);
-                       else if (diff_opt_cnt) {
-                               argv += diff_opt_cnt;
-                               argc -= diff_opt_cnt;
-                               continue;
-                       }
-                       else
-                               usage(diff_files_usage);
-               }
+               else
+                       usage(diff_files_usage);
                argv++; argc--;
        }
-       if (dense_combined_merges)
-               diff_options.output_format = DIFF_FORMAT_PATCH;
-
-       /* Find the directory, and set up the pathspec */
-       pathspec = get_pathspec(prefix, argv + 1);
-       entries = read_cache();
-
-       if (diff_setup_done(&diff_options) < 0)
+       /*
+        * Make sure there are NO revision (i.e. pending object) parameter,
+        * rev.max_count is reasonable (0 <= n <= 3),
+        * there is no other revision filtering parameters.
+        */
+       if (rev.pending_objects ||
+           rev.min_age != -1 || rev.max_age != -1)
                usage(diff_files_usage);
-
-       /* At this point, if argc == 1, then we are doing everything.
-        * Otherwise argv[1] .. argv[argc-1] have the explicit paths.
+       /*
+        * Backward compatibility wart - "diff-files -s" used to
+        * defeat the common diff option "-s" which asked for
+        * DIFF_FORMAT_NO_OUTPUT.
         */
-       if (entries < 0) {
-               perror("read_cache");
-               exit(1);
-       }
-
-       for (i = 0; i < entries; i++) {
-               struct stat st;
-               unsigned int oldmode, newmode;
-               struct cache_entry *ce = active_cache[i];
-               int changed;
-
-               if (!ce_path_match(ce, pathspec))
-                       continue;
-
-               if (ce_stage(ce)) {
-                       struct {
-                               struct combine_diff_path p;
-                               struct combine_diff_parent filler[5];
-                       } combine;
-                       int num_compare_stages = 0;
-
-                       combine.p.next = NULL;
-                       combine.p.len = ce_namelen(ce);
-                       combine.p.path = xmalloc(combine.p.len + 1);
-                       memcpy(combine.p.path, ce->name, combine.p.len);
-                       combine.p.path[combine.p.len] = 0;
-                       combine.p.mode = 0;
-                       memset(combine.p.sha1, 0, 20);
-                       memset(&combine.p.parent[0], 0,
-                              sizeof(combine.filler));
-
-                       while (i < entries) {
-                               struct cache_entry *nce = active_cache[i];
-                               int stage;
-
-                               if (strcmp(ce->name, nce->name))
-                                       break;
-
-                               /* Stage #2 (ours) is the first parent,
-                                * stage #3 (theirs) is the second.
-                                */
-                               stage = ce_stage(nce);
-                               if (2 <= stage) {
-                                       int mode = ntohl(nce->ce_mode);
-                                       num_compare_stages++;
-                                       memcpy(combine.p.parent[stage-2].sha1,
-                                              nce->sha1, 20);
-                                       combine.p.parent[stage-2].mode =
-                                               DIFF_FILE_CANON_MODE(mode);
-                                       combine.p.parent[stage-2].status =
-                                               DIFF_STATUS_MODIFIED;
-                               }
-
-                               /* diff against the proper unmerged stage */
-                               if (stage == diff_unmerged_stage)
-                                       ce = nce;
-                               i++;
-                       }
-                       /*
-                        * Compensate for loop update
-                        */
-                       i--;
-
-                       if (combine_merges && num_compare_stages == 2) {
-                               show_combined_diff(&combine.p, 2,
-                                                  dense_combined_merges,
-                                                  NULL,
-                                                  &diff_options);
-                               free(combine.p.path);
-                               continue;
-                       }
-                       free(combine.p.path);
-
-                       /*
-                        * Show the diff for the 'ce' if we found the one
-                        * from the desired stage.
-                        */
-                       show_unmerge(ce->name);
-                       if (ce_stage(ce) != diff_unmerged_stage)
-                               continue;
-               }
-
-               if (lstat(ce->name, &st) < 0) {
-                       if (errno != ENOENT && errno != ENOTDIR) {
-                               perror(ce->name);
-                               continue;
-                       }
-                       if (silent)
-                               continue;
-                       show_file('-', ce);
-                       continue;
-               }
-               changed = ce_match_stat(ce, &st, 0);
-               if (!changed && !diff_options.find_copies_harder)
-                       continue;
-               oldmode = ntohl(ce->ce_mode);
-
-               newmode = DIFF_FILE_CANON_MODE(st.st_mode);
-               if (!trust_executable_bit &&
-                   S_ISREG(newmode) && S_ISREG(oldmode) &&
-                   ((newmode ^ oldmode) == 0111))
-                       newmode = oldmode;
-               show_modified(oldmode, newmode,
-                             ce->sha1, (changed ? null_sha1 : ce->sha1),
-                             ce->name);
-       }
-       diffcore_std(&diff_options);
-       diff_flush(&diff_options);
-       return 0;
+       if (rev.diffopt.output_format == DIFF_FORMAT_NO_OUTPUT)
+               rev.diffopt.output_format = DIFF_FORMAT_RAW;
+       return run_diff_files(&rev, silent);
 }