revert: plug memory leak in "cherry-pick root commit" codepath

[git.git] / diff-lib.c

diff --git a/diff-lib.c b/diff-lib.c
index ec2e2ac0058a71a58f6e3af57f2bd86520a67779..c9f6e05badf7b752188dcb5fa28a9bef53521dee 100644 (file)
--- a/diff-lib.c
+++ b/diff-lib.c
@@ -55,6 +55,27 @@ static int check_removed(const struct cache_entry *ce, struct stat *st)
        return 0;
 }
 
+/*
+ * Has a file changed or has a submodule new commits or a dirty work tree?
+ *
+ * Return 1 when changes are detected, 0 otherwise. If the DIRTY_SUBMODULES
+ * option is set, the caller does not only want to know if a submodule is
+ * modified at all but wants to know all the conditions that are met (new
+ * commits, untracked content and/or modified content).
+ */
+static int match_stat_with_submodule(struct diff_options *diffopt,
+                                     struct cache_entry *ce, struct stat *st,
+                                     unsigned ce_option, unsigned *dirty_submodule)
+{
+       int changed = ce_match_stat(ce, st, ce_option);
+       if (S_ISGITLINK(ce->ce_mode)
+           && !DIFF_OPT_TST(diffopt, IGNORE_SUBMODULES)
+           && (!changed || DIFF_OPT_TST(diffopt, DIRTY_SUBMODULES))) {
+               *dirty_submodule = is_submodule_modified(ce->name, DIFF_OPT_TST(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES));
+       }
+       return changed;
+}
+
 int run_diff_files(struct rev_info *revs, unsigned int option)
 {
        int entries, i;
@@ -161,7 +182,7 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                                continue;
                }
 
-               if ((ce_uptodate(ce) && !S_ISGITLINK(ce->ce_mode)) || ce_skip_worktree(ce))
+               if (ce_uptodate(ce) || ce_skip_worktree(ce))
                        continue;
 
                /* If CE_VALID is set, don't look at workdir for file removal */
@@ -177,14 +198,9 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                                       ce->sha1, ce->name, 0);
                        continue;
                }
-               changed = ce_match_stat(ce, &st, ce_option);
-               if (S_ISGITLINK(ce->ce_mode)
-                   && (!changed || (revs->diffopt.output_format & DIFF_FORMAT_PATCH))
-                   && is_submodule_modified(ce->name)) {
-                       changed = 1;
-                       dirty_submodule = 1;
-               }
-               if (!changed) {
+               changed = match_stat_with_submodule(&revs->diffopt, ce, &st,
+                                                   ce_option, &dirty_submodule);
+               if (!changed && !dirty_submodule) {
                        ce_mark_uptodate(ce);
                        if (!DIFF_OPT_TST(&revs->diffopt, FIND_COPIES_HARDER))
                                continue;
@@ -220,7 +236,7 @@ static int get_stat_data(struct cache_entry *ce,
                         const unsigned char **sha1p,
                         unsigned int *modep,
                         int cached, int match_missing,
-                        unsigned *dirty_submodule, int output_format)
+                        unsigned *dirty_submodule, struct diff_options *diffopt)
 {
        const unsigned char *sha1 = ce->sha1;
        unsigned int mode = ce->ce_mode;
@@ -239,13 +255,8 @@ static int get_stat_data(struct cache_entry *ce,
                        }
                        return -1;
                }
-               changed = ce_match_stat(ce, &st, 0);
-               if (S_ISGITLINK(ce->ce_mode)
-                   && (!changed || (output_format & DIFF_FORMAT_PATCH))
-                   && is_submodule_modified(ce->name)) {
-                       changed = 1;
-                       *dirty_submodule = 1;
-               }
+               changed = match_stat_with_submodule(diffopt, ce, &st,
+                                                   0, dirty_submodule);
                if (changed) {
                        mode = ce_mode_from_stat(ce, st.st_mode);
                        sha1 = null_sha1;
@@ -270,7 +281,7 @@ static void show_new_file(struct rev_info *revs,
         * the working copy.
         */
        if (get_stat_data(new, &sha1, &mode, cached, match_missing,
-           &dirty_submodule, revs->diffopt.output_format) < 0)
+           &dirty_submodule, &revs->diffopt) < 0)
                return;
 
        diff_index_show_file(revs, "+", new, sha1, mode, dirty_submodule);
@@ -287,7 +298,7 @@ static int show_modified(struct rev_info *revs,
        unsigned dirty_submodule = 0;
 
        if (get_stat_data(new, &sha1, &mode, cached, match_missing,
-                         &dirty_submodule, revs->diffopt.output_format) < 0) {
+                         &dirty_submodule, &revs->diffopt) < 0) {
                if (report_missing)
                        diff_index_show_file(revs, "-", old,
                                             old->sha1, old->ce_mode, 0);
@@ -320,7 +331,7 @@ static int show_modified(struct rev_info *revs,
        }
 
        oldmode = old->ce_mode;
-       if (mode == oldmode && !hashcmp(sha1, old->sha1) &&
+       if (mode == oldmode && !hashcmp(sha1, old->sha1) && !dirty_submodule &&
            !DIFF_OPT_TST(&revs->diffopt, FIND_COPIES_HARDER))
                return 0;
 
@@ -508,9 +519,12 @@ int do_diff_cache(const unsigned char *tree_sha1, struct diff_options *opt)
 int index_differs_from(const char *def, int diff_flags)
 {
        struct rev_info rev;
+       struct setup_revision_opt opt;
 
        init_revisions(&rev, NULL);
-       setup_revisions(0, NULL, &rev, def);
+       memset(&opt, 0, sizeof(opt));
+       opt.def = def;
+       setup_revisions(0, NULL, &rev, &opt);
        DIFF_OPT_SET(&rev.diffopt, QUICK);
        DIFF_OPT_SET(&rev.diffopt, EXIT_WITH_STATUS);
        rev.diffopt.flags |= diff_flags;