git_config_set: reuse empty sections

diff --git a/builtin/am.c b/builtin/am.c
index 4b6f1534f88407cf569c7f8e4c4b1df4ba3fc1e0..acfe9d3c8cd6dbd8362c17d55dc036ce6682ce8a 100644 (file)
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -708,6 +708,7 @@ static int split_mail_mbox(struct am_state *state, const char **paths,
 {
        struct child_process cp = CHILD_PROCESS_INIT;
        struct strbuf last = STRBUF_INIT;
+       int ret;
 
        cp.git_cmd = 1;
        argv_array_push(&cp.args, "mailsplit");
@@ -721,13 +722,16 @@ static int split_mail_mbox(struct am_state *state, const char **paths,
        argv_array_push(&cp.args, "--");
        argv_array_pushv(&cp.args, paths);
 
-       if (capture_command(&cp, &last, 8))
-               return -1;
+       ret = capture_command(&cp, &last, 8);
+       if (ret)
+               goto exit;
 
        state->cur = 1;
        state->last = strtol(last.buf, NULL, 10);
 
-       return 0;
+exit:
+       strbuf_release(&last);
+       return ret ? -1 : 0;
 }
 
 /**
@@ -1142,43 +1146,6 @@ static void refresh_and_write_cache(void)
                die(_("unable to write index file"));
 }
 
-/**
- * Returns 1 if the index differs from HEAD, 0 otherwise. When on an unborn
- * branch, returns 1 if there are entries in the index, 0 otherwise. If an
- * strbuf is provided, the space-separated list of files that differ will be
- * appended to it.
- */
-static int index_has_changes(struct strbuf *sb)
-{
-       struct object_id head;
-       int i;
-
-       if (!get_oid_tree("HEAD", &head)) {
-               struct diff_options opt;
-
-               diff_setup(&opt);
-               DIFF_OPT_SET(&opt, EXIT_WITH_STATUS);
-               if (!sb)
-                       DIFF_OPT_SET(&opt, QUICK);
-               do_diff_cache(&head, &opt);
-               diffcore_std(&opt);
-               for (i = 0; sb && i < diff_queued_diff.nr; i++) {
-                       if (i)
-                               strbuf_addch(sb, ' ');
-                       strbuf_addstr(sb, diff_queued_diff.queue[i]->two->path);
-               }
-               diff_flush(&opt);
-               return DIFF_OPT_TST(&opt, HAS_CHANGES) != 0;
-       } else {
-               for (i = 0; sb && i < active_nr; i++) {
-                       if (i)
-                               strbuf_addch(sb, ' ');
-                       strbuf_addstr(sb, active_cache[i]->name);
-               }
-               return !!active_nr;
-       }
-}
-
 /**
  * Dies with a user-friendly message on how to proceed after resolving the
  * problem. This message can be overridden with state->resolvemsg.
@@ -1409,8 +1376,8 @@ static void write_commit_patch(const struct am_state *state, struct commit *comm
        rev_info.show_root_diff = 1;
        rev_info.diffopt.output_format = DIFF_FORMAT_PATCH;
        rev_info.no_commit_id = 1;
-       DIFF_OPT_SET(&rev_info.diffopt, BINARY);
-       DIFF_OPT_SET(&rev_info.diffopt, FULL_INDEX);
+       rev_info.diffopt.flags.binary = 1;
+       rev_info.diffopt.flags.full_index = 1;
        rev_info.diffopt.use_color = 0;
        rev_info.diffopt.file = fp;
        rev_info.diffopt.close_file = 1;
@@ -1433,7 +1400,7 @@ static void write_index_patch(const struct am_state *state)
        if (!get_oid_tree("HEAD", &head))
                tree = lookup_tree(&head);
        else
-               tree = lookup_tree(&empty_tree_oid);
+               tree = lookup_tree(the_hash_algo->empty_tree);
 
        fp = xfopen(am_path(state, "patch"), "w");
        init_revisions(&rev_info, NULL);
@@ -2148,7 +2115,7 @@ static void am_abort(struct am_state *state)
                           has_curr_head ? &curr_head : NULL, 0,
                           UPDATE_REFS_DIE_ON_ERR);
        else if (curr_branch)
-               delete_ref(NULL, curr_branch, NULL, REF_NODEREF);
+               delete_ref(NULL, curr_branch, NULL, REF_NO_DEREF);
 
        free(curr_branch);
        am_destroy(state);