sha1-file: release strbuf after use

[thirdparty/git.git] / builtin / merge.c

diff --git a/builtin/merge.c b/builtin/merge.c
index e96f72af8044769df6b4ef42f0525b572b0c39e2..e2ccbc44e204173b09f5ad4b704a31a9e8643bb6 100644 (file)
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -37,6 +37,7 @@
 #include "packfile.h"
 #include "tag.h"
 #include "alias.h"
+#include "branch.h"
 #include "commit-reach.h"
 #include "wt-status.h"
 
@@ -58,7 +59,7 @@ static const char * const builtin_merge_usage[] = {
 };
 
 static int show_diffstat = 1, shortlog_len = -1, squash;
-static int option_commit = 1;
+static int option_commit = -1;
 static int option_edit = -1;
 static int allow_trivial = 1, have_message, verify_signatures;
 static int overwrite_ignore = 1;
@@ -73,6 +74,7 @@ static int option_renormalize;
 static int verbosity;
 static int allow_rerere_auto;
 static int abort_current_merge;
+static int quit_current_merge;
 static int continue_current_merge;
 static int allow_unrelated_histories;
 static int show_progress = -1;
@@ -274,6 +276,8 @@ static struct option builtin_merge_options[] = {
        OPT__VERBOSITY(&verbosity),
        OPT_BOOL(0, "abort", &abort_current_merge,
                N_("abort the current in-progress merge")),
+       OPT_BOOL(0, "quit", &quit_current_merge,
+               N_("--abort but leave index and working tree alone")),
        OPT_BOOL(0, "continue", &continue_current_merge,
                N_("continue the current in-progress merge")),
        OPT_BOOL(0, "allow-unrelated-histories", &allow_unrelated_histories,
@@ -287,14 +291,6 @@ static struct option builtin_merge_options[] = {
        OPT_END()
 };
 
-/* Cleans up metadata that is uninteresting after a succeeded merge. */
-static void drop_save(void)
-{
-       unlink(git_path_merge_head(the_repository));
-       unlink(git_path_merge_msg(the_repository));
-       unlink(git_path_merge_mode(the_repository));
-}
-
 static int save_state(struct object_id *stash)
 {
        int len;
@@ -388,7 +384,7 @@ static void finish_up_to_date(const char *msg)
 {
        if (verbosity >= 0)
                printf("%s%s\n", squash ? _(" (nothing to squash)") : "", msg);
-       drop_save();
+       remove_merge_branch_state(the_repository);
 }
 
 static void squash_message(struct commit *commit, struct commit_list *remoteheads)
@@ -457,7 +453,7 @@ static void finish(struct commit *head_commit,
                         * We ignore errors in 'gc --auto', since the
                         * user should see them.
                         */
-                       close_all_packs(the_repository->objects);
+                       close_object_store(the_repository->objects);
                        run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
                }
        }
@@ -881,7 +877,7 @@ static int merge_trivial(struct commit *head, struct commit_list *remoteheads)
                        &result_commit, NULL, sign_commit))
                die(_("failed to write commit object"));
        finish(head, remoteheads, &result_commit, "In-index merge");
-       drop_save();
+       remove_merge_branch_state(the_repository);
        return 0;
 }
 
@@ -896,6 +892,7 @@ static int finish_automerge(struct commit *head,
        struct strbuf buf = STRBUF_INIT;
        struct object_id result_commit;
 
+       write_tree_trivial(result_tree);
        free_commit_list(common);
        parents = remoteheads;
        if (!head_subsumed || fast_forward == FF_NO)
@@ -907,7 +904,7 @@ static int finish_automerge(struct commit *head,
        strbuf_addf(&buf, "Merge made by the '%s' strategy.", wt_strategy);
        finish(head, remoteheads, &result_commit, buf.buf);
        strbuf_release(&buf);
-       drop_save();
+       remove_merge_branch_state(the_repository);
        return 0;
 }
 
@@ -1289,6 +1286,16 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                goto done;
        }
 
+       if (quit_current_merge) {
+               if (orig_argc != 2)
+                       usage_msg_opt(_("--quit expects no arguments"),
+                                     builtin_merge_usage,
+                                     builtin_merge_options);
+
+               remove_merge_branch_state(the_repository);
+               goto done;
+       }
+
        if (continue_current_merge) {
                int nargc = 1;
                const char *nargv[] = {"commit", NULL};
@@ -1339,9 +1346,19 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
        if (squash) {
                if (fast_forward == FF_NO)
                        die(_("You cannot combine --squash with --no-ff."));
+               if (option_commit > 0)
+                       die(_("You cannot combine --squash with --commit."));
+               /*
+                * squash can now silently disable option_commit - this is not
+                * a problem as it is only overriding the default, not a user
+                * supplied option.
+                */
                option_commit = 0;
        }
 
+       if (option_commit < 0)
+               option_commit = 1;
+
        if (!argc) {
                if (default_to_upstream)
                        argc = setup_with_upstream(&argv);
@@ -1495,7 +1512,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                }
 
                finish(head_commit, remoteheads, &commit->object.oid, msg.buf);
-               drop_save();
+               remove_merge_branch_state(the_repository);
                goto done;
        } else if (!remoteheads->next && common->next)
                ;
@@ -1570,8 +1587,8 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
            save_state(&stash))
                oidclr(&stash);
 
-       for (i = 0; i < use_strategies_nr; i++) {
-               int ret;
+       for (i = 0; !merge_was_ok && i < use_strategies_nr; i++) {
+               int ret, cnt;
                if (i) {
                        printf(_("Rewinding the tree to pristine...\n"));
                        restore_state(&head_commit->object.oid, &stash);
@@ -1588,40 +1605,26 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                ret = try_merge_strategy(use_strategies[i]->name,
                                         common, remoteheads,
                                         head_commit);
-               if (!option_commit && !ret) {
-                       merge_was_ok = 1;
-                       /*
-                        * This is necessary here just to avoid writing
-                        * the tree, but later we will *not* exit with
-                        * status code 1 because merge_was_ok is set.
-                        */
-                       ret = 1;
-               }
-
-               if (ret) {
-                       /*
-                        * The backend exits with 1 when conflicts are
-                        * left to be resolved, with 2 when it does not
-                        * handle the given merge at all.
-                        */
-                       if (ret == 1) {
-                               int cnt = evaluate_result();
-
-                               if (best_cnt <= 0 || cnt <= best_cnt) {
-                                       best_strategy = use_strategies[i]->name;
-                                       best_cnt = cnt;
+               /*
+                * The backend exits with 1 when conflicts are
+                * left to be resolved, with 2 when it does not
+                * handle the given merge at all.
+                */
+               if (ret < 2) {
+                       if (!ret) {
+                               if (option_commit) {
+                                       /* Automerge succeeded. */
+                                       automerge_was_ok = 1;
+                                       break;
                                }
+                               merge_was_ok = 1;
+                       }
+                       cnt = evaluate_result();
+                       if (best_cnt <= 0 || cnt <= best_cnt) {
+                               best_strategy = use_strategies[i]->name;
+                               best_cnt = cnt;
                        }
-                       if (merge_was_ok)
-                               break;
-                       else
-                               continue;
                }
-
-               /* Automerge succeeded. */
-               write_tree_trivial(&result_tree);
-               automerge_was_ok = 1;
-               break;
        }
 
        /*