Merge branch 'cc/shared-index-permbits'

diff --git a/commit.c b/commit.c
index dc8a39d52a1c31f979068a34bbdeeca14f3a7547..d13a7bc3746406bdaf0bda0975c25b40111afe47 100644 (file)
--- a/commit.c
+++ b/commit.c
@@ -17,6 +17,8 @@
 #include "sha1-lookup.h"
 #include "wt-status.h"
 #include "advice.h"
+#include "refs.h"
+#include "commit-reach.h"
 
 static struct commit_extra_header *read_commit_extra_header_lines(const char *buf, size_t len, const char **);
 
@@ -655,11 +657,10 @@ struct commit *pop_commit(struct commit_list **stack)
 /* count number of children that have not been emitted */
 define_commit_slab(indegree_slab, int);
 
-/* record author-date for each commit object */
 define_commit_slab(author_date_slab, timestamp_t);
 
-static void record_author_date(struct author_date_slab *author_date,
-                              struct commit *commit)
+void record_author_date(struct author_date_slab *author_date,
+                       struct commit *commit)
 {
        const char *buffer = get_commit_buffer(commit, NULL);
        struct ident_split ident;
@@ -684,8 +685,8 @@ static void record_author_date(struct author_date_slab *author_date,
        unuse_commit_buffer(commit, buffer);
 }
 
-static int compare_commits_by_author_date(const void *a_, const void *b_,
-                                         void *cb_data)
+int compare_commits_by_author_date(const void *a_, const void *b_,
+                                  void *cb_data)
 {
        const struct commit *a = a_, *b = b_;
        struct author_date_slab *author_date = cb_data;
@@ -843,6 +844,86 @@ void sort_in_topological_order(struct commit_list **list, enum rev_sort_order so
                clear_author_date_slab(&author_date);
 }
 
+struct rev_collect {
+       struct commit **commit;
+       int nr;
+       int alloc;
+       unsigned int initial : 1;
+};
+
+static void add_one_commit(struct object_id *oid, struct rev_collect *revs)
+{
+       struct commit *commit;
+
+       if (is_null_oid(oid))
+               return;
+
+       commit = lookup_commit(the_repository, oid);
+       if (!commit ||
+           (commit->object.flags & TMP_MARK) ||
+           parse_commit(commit))
+               return;
+
+       ALLOC_GROW(revs->commit, revs->nr + 1, revs->alloc);
+       revs->commit[revs->nr++] = commit;
+       commit->object.flags |= TMP_MARK;
+}
+
+static int collect_one_reflog_ent(struct object_id *ooid, struct object_id *noid,
+                                 const char *ident, timestamp_t timestamp,
+                                 int tz, const char *message, void *cbdata)
+{
+       struct rev_collect *revs = cbdata;
+
+       if (revs->initial) {
+               revs->initial = 0;
+               add_one_commit(ooid, revs);
+       }
+       add_one_commit(noid, revs);
+       return 0;
+}
+
+struct commit *get_fork_point(const char *refname, struct commit *commit)
+{
+       struct object_id oid;
+       struct rev_collect revs;
+       struct commit_list *bases;
+       int i;
+       struct commit *ret = NULL;
+
+       memset(&revs, 0, sizeof(revs));
+       revs.initial = 1;
+       for_each_reflog_ent(refname, collect_one_reflog_ent, &revs);
+
+       if (!revs.nr && !get_oid(refname, &oid))
+               add_one_commit(&oid, &revs);
+
+       for (i = 0; i < revs.nr; i++)
+               revs.commit[i]->object.flags &= ~TMP_MARK;
+
+       bases = get_merge_bases_many(commit, revs.nr, revs.commit);
+
+       /*
+        * There should be one and only one merge base, when we found
+        * a common ancestor among reflog entries.
+        */
+       if (!bases || bases->next)
+               goto cleanup_return;
+
+       /* And the found one must be one of the reflog entries */
+       for (i = 0; i < revs.nr; i++)
+               if (&bases->item->object == &revs.commit[i]->object)
+                       break; /* found */
+       if (revs.nr <= i)
+               goto cleanup_return;
+
+       ret = bases->item;
+
+cleanup_return:
+       free_commit_list(bases);
+       return ret;
+}
+
 static const char gpg_sig_header[] = "gpgsig";
 static const int gpg_sig_header_len = sizeof(gpg_sig_header) - 1;
 
@@ -1018,7 +1099,33 @@ int check_commit_signature(const struct commit *commit, struct signature_check *
        return ret;
 }
 
+void verify_merge_signature(struct commit *commit, int verbosity)
+{
+       char hex[GIT_MAX_HEXSZ + 1];
+       struct signature_check signature_check;
+       memset(&signature_check, 0, sizeof(signature_check));
+
+       check_commit_signature(commit, &signature_check);
 
+       find_unique_abbrev_r(hex, &commit->object.oid, DEFAULT_ABBREV);
+       switch (signature_check.result) {
+       case 'G':
+               break;
+       case 'U':
+               die(_("Commit %s has an untrusted GPG signature, "
+                     "allegedly by %s."), hex, signature_check.signer);
+       case 'B':
+               die(_("Commit %s has a bad GPG signature "
+                     "allegedly by %s."), hex, signature_check.signer);
+       default: /* 'N' */
+               die(_("Commit %s does not have a GPG signature."), hex);
+       }
+       if (verbosity >= 0 && signature_check.result == 'G')
+               printf(_("Commit %s has a good GPG signature by %s\n"),
+                      hex, signature_check.signer);
+
+       signature_check_clear(&signature_check);
+}
 
 void append_merge_tag_headers(struct commit_list *parents,
                              struct commit_extra_header ***tail)