diff: restrict pathspec limitations to diff b/f case only

diff --git a/builtin/diff.c b/builtin/diff.c
index 9fc273d8cd78d53a55047e17d44eb89291741167..2af254222593883e9ea0b7288e016dd0aba7102f 100644 (file)
--- a/builtin/diff.c
+++ b/builtin/diff.c
@@ -64,15 +64,18 @@ static void stuff_change(struct diff_options *opt,
 
 static int builtin_diff_b_f(struct rev_info *revs,
                            int argc, const char **argv,
-                           struct blobinfo *blob,
-                           const char *path)
+                           struct blobinfo *blob)
 {
        /* Blob vs file in the working tree*/
        struct stat st;
+       const char *path;
 
        if (argc > 1)
                usage(builtin_diff_usage);
 
+       GUARD_PATHSPEC(&revs->prune_data, PATHSPEC_FROMTOP | PATHSPEC_LITERAL);
+       path = revs->prune_data.items[0].match;
+
        if (lstat(path, &st))
                die_errno(_("failed to stat '%s'"), path);
        if (!(S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)))
@@ -140,7 +143,7 @@ static int builtin_diff_index(struct rev_info *revs,
                usage(builtin_diff_usage);
        if (!cached) {
                setup_work_tree();
-               if (read_cache_preload(revs->diffopt.pathspec.raw) < 0) {
+               if (read_cache_preload(&revs->diffopt.pathspec) < 0) {
                        perror("read_cache_preload");
                        return -1;
                }
@@ -242,7 +245,7 @@ static int builtin_diff_files(struct rev_info *revs, int argc, const char **argv
                revs->combine_merges = revs->dense_combined_merges = 1;
 
        setup_work_tree();
-       if (read_cache_preload(revs->diffopt.pathspec.raw) < 0) {
+       if (read_cache_preload(&revs->diffopt.pathspec) < 0) {
                perror("read_cache_preload");
                return -1;
        }
@@ -255,7 +258,6 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
        struct rev_info rev;
        struct object_array ent = OBJECT_ARRAY_INIT;
        int blobs = 0, paths = 0;
-       const char *path = NULL;
        struct blobinfo blob[2];
        int nongit;
        int result = 0;
@@ -366,11 +368,8 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
                        die(_("unhandled object '%s' given."), name);
                }
        }
-       if (rev.prune_data.nr) {
-               if (!path)
-                       path = rev.prune_data.items[0].match;
+       if (rev.prune_data.nr)
                paths += rev.prune_data.nr;
-       }
 
        /*
         * Now, do the arguments look reasonable?
@@ -383,7 +382,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
                case 1:
                        if (paths != 1)
                                usage(builtin_diff_usage);
-                       result = builtin_diff_b_f(&rev, argc, argv, blob, path);
+                       result = builtin_diff_b_f(&rev, argc, argv, blob);
                        break;
                case 2:
                        if (paths)