Handle core.symlinks=false case in merge-recursive.

[git.git] / builtin-diff.c

diff --git a/builtin-diff.c b/builtin-diff.c
index a090e298a55ef110a6fdd0e0dde54ea744a52f76..28b660a780f9f2ae48acf5e8d3dc7c7aee178de2 100644 (file)
--- a/builtin-diff.c
+++ b/builtin-diff.c
@@ -25,47 +25,6 @@ struct blobinfo {
 static const char builtin_diff_usage[] =
 "git-diff <options> <rev>{0,2} -- <path>*";
 
-static int builtin_diff_files(struct rev_info *revs,
-                             int argc, const char **argv)
-{
-       int silent = 0;
-       while (1 < argc) {
-               const char *arg = argv[1];
-               if (!strcmp(arg, "--base"))
-                       revs->max_count = 1;
-               else if (!strcmp(arg, "--ours"))
-                       revs->max_count = 2;
-               else if (!strcmp(arg, "--theirs"))
-                       revs->max_count = 3;
-               else if (!strcmp(arg, "-q"))
-                       silent = 1;
-               else
-                       usage(builtin_diff_usage);
-               argv++; argc--;
-       }
-       /*
-        * Make sure there are NO revision (i.e. pending object) parameter,
-        * specified rev.max_count is reasonable (0 <= n <= 3), and
-        * there is no other revision filtering parameter.
-        */
-       if (revs->pending.nr ||
-           revs->min_age != -1 ||
-           revs->max_age != -1 ||
-           3 < revs->max_count)
-               usage(builtin_diff_usage);
-       if (revs->max_count < 0 &&
-           (revs->diffopt.output_format & DIFF_FORMAT_PATCH))
-               revs->combine_merges = revs->dense_combined_merges = 1;
-       /*
-        * Backward compatibility wart - "diff-files -s" used to
-        * defeat the common diff option "-s" which asked for
-        * DIFF_FORMAT_NO_OUTPUT.
-        */
-       if (revs->diffopt.output_format == DIFF_FORMAT_NO_OUTPUT)
-               revs->diffopt.output_format = DIFF_FORMAT_RAW;
-       return run_diff_files(revs, silent);
-}
-
 static void stuff_change(struct diff_options *opt,
                         unsigned old_mode, unsigned new_mode,
                         const unsigned char *old_sha1,
@@ -75,9 +34,8 @@ static void stuff_change(struct diff_options *opt,
 {
        struct diff_filespec *one, *two;
 
-       if (memcmp(null_sha1, old_sha1, 20) &&
-           memcmp(null_sha1, new_sha1, 20) &&
-           !memcmp(old_sha1, new_sha1, 20))
+       if (!is_null_sha1(old_sha1) && !is_null_sha1(new_sha1) &&
+           !hashcmp(old_sha1, new_sha1))
                return;
 
        if (opt->reverse_diff) {
@@ -159,6 +117,10 @@ static int builtin_diff_index(struct rev_info *revs,
            revs->max_count != -1 || revs->min_age != -1 ||
            revs->max_age != -1)
                usage(builtin_diff_usage);
+       if (read_cache() < 0) {
+               perror("read_cache");
+               return -1;
+       }
        return run_diff_index(revs, cached);
 }
 
@@ -200,7 +162,8 @@ static int builtin_diff_combined(struct rev_info *revs,
        parent = xmalloc(ents * sizeof(*parent));
        /* Again, the revs are all reverse */
        for (i = 0; i < ents; i++)
-               memcpy(parent + i, ent[ents - 1 - i].item->sha1, 20);
+               hashcpy((unsigned char *)(parent + i),
+                       ent[ents - 1 - i].item->sha1);
        diff_tree_combined(parent[0], parent + 1, ents - 1,
                           revs->dense_combined_merges, revs);
        return 0;
@@ -226,6 +189,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
        int ents = 0, blobs = 0, paths = 0;
        const char *path = NULL;
        struct blobinfo blob[2];
+       int nongit = 0;
 
        /*
         * We could get N tree-ish in the rev.pending_objects list.
@@ -247,6 +211,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
         * Other cases are errors.
         */
 
+       prefix = setup_git_directory_gently(&nongit);
        git_config(git_diff_ui_config);
        init_revisions(&rev, prefix);
 
@@ -268,6 +233,8 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
                                break;
                        else if (!strcmp(arg, "--cached")) {
                                add_head(&rev);
+                               if (!rev.pending.nr)
+                                       die("No HEAD commit to compare with (yet)");
                                break;
                        }
                }
@@ -298,7 +265,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
                if (obj->type == OBJ_BLOB) {
                        if (2 <= blobs)
                                die("more than two blobs given: '%s'", name);
-                       memcpy(blob[blobs].sha1, obj->sha1, 20);
+                       hashcpy(blob[blobs].sha1, obj->sha1);
                        blob[blobs].name = name;
                        blobs++;
                        continue;
@@ -322,7 +289,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
        if (!ents) {
                switch (blobs) {
                case 0:
-                       return builtin_diff_files(&rev, argc, argv);
+                       return run_diff_files_cmd(&rev, argc, argv);
                        break;
                case 1:
                        if (paths != 1)