update-index/diff-index: use core.preloadindex to improve performance

diff --git a/builtin/diff.c b/builtin/diff.c
index da8f6aac2bde9bb93cb059898a21c19c9bb27634..198b9216a47e646e1372085e103cf8e72da31eba 100644 (file)
--- a/builtin/diff.c
+++ b/builtin/diff.c
@@ -29,6 +29,8 @@ static void stuff_change(struct diff_options *opt,
                         unsigned old_mode, unsigned new_mode,
                         const unsigned char *old_sha1,
                         const unsigned char *new_sha1,
+                        int old_sha1_valid,
+                        int new_sha1_valid,
                         const char *old_name,
                         const char *new_name)
 {
@@ -54,8 +56,8 @@ static void stuff_change(struct diff_options *opt,
 
        one = alloc_filespec(old_name);
        two = alloc_filespec(new_name);
-       fill_filespec(one, old_sha1, old_mode);
-       fill_filespec(two, new_sha1, new_mode);
+       fill_filespec(one, old_sha1, old_sha1_valid, old_mode);
+       fill_filespec(two, new_sha1, new_sha1_valid, new_mode);
 
        diff_queue(&diff_queued_diff, one, two);
 }
@@ -84,6 +86,7 @@ static int builtin_diff_b_f(struct rev_info *revs,
        stuff_change(&revs->diffopt,
                     blob[0].mode, canon_mode(st.st_mode),
                     blob[0].sha1, null_sha1,
+                    1, 0,
                     path, path);
        diffcore_std(&revs->diffopt);
        diff_flush(&revs->diffopt);
@@ -108,6 +111,7 @@ static int builtin_diff_blobs(struct rev_info *revs,
        stuff_change(&revs->diffopt,
                     blob[0].mode, blob[1].mode,
                     blob[0].sha1, blob[1].sha1,
+                    1, 1,
                     blob[0].name, blob[1].name);
        diffcore_std(&revs->diffopt);
        diff_flush(&revs->diffopt);
@@ -126,8 +130,6 @@ static int builtin_diff_index(struct rev_info *revs,
                        usage(builtin_diff_usage);
                argv++; argc--;
        }
-       if (!cached)
-               setup_work_tree();
        /*
         * Make sure there is one revision (i.e. pending object),
         * and there is no revision filtering parameters.
@@ -136,8 +138,14 @@ 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_preload(revs->diffopt.pathspec.raw) < 0) {
-               perror("read_cache_preload");
+       if (!cached) {
+               setup_work_tree();
+               if (read_cache_preload(revs->diffopt.pathspec.raw) < 0) {
+                       perror("read_cache_preload");
+                       return -1;
+               }
+       } else if (read_cache() < 0) {
+               perror("read_cache");
                return -1;
        }
        return run_diff_index(revs, cached);
@@ -298,8 +306,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
        argc = setup_revisions(argc, argv, &rev, NULL);
        if (!rev.diffopt.output_format) {
                rev.diffopt.output_format = DIFF_FORMAT_PATCH;
-               if (diff_setup_done(&rev.diffopt) < 0)
-                       die(_("diff_setup_done failed"));
+               diff_setup_done(&rev.diffopt);
        }
 
        DIFF_OPT_SET(&rev.diffopt, RECURSIVE);