Merge branch 'maint-1.7.7' into maint
[gitweb.git] / builtin / revert.c
index 1ea525c10e4c00b66006bf46465ebd490823f25f..028bcbcd75d21ada2bc0406ff74e3073014bb41f 100644 (file)
@@ -60,13 +60,14 @@ struct replay_opts {
        int allow_rerere_auto;
 
        int mainline;
-       int commit_argc;
-       const char **commit_argv;
 
        /* Merge strategy */
        const char *strategy;
        const char **xopts;
        size_t xopts_nr, xopts_alloc;
+
+       /* Only used by REPLAY_NONE */
+       struct rev_info *revs;
 };
 
 #define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION"
@@ -169,9 +170,9 @@ static void parse_args(int argc, const char **argv, struct replay_opts *opts)
                        die(_("program error"));
        }
 
-       opts->commit_argc = parse_options(argc, argv, NULL, options, usage_str,
-                                       PARSE_OPT_KEEP_ARGV0 |
-                                       PARSE_OPT_KEEP_UNKNOWN);
+       argc = parse_options(argc, argv, NULL, options, usage_str,
+                       PARSE_OPT_KEEP_ARGV0 |
+                       PARSE_OPT_KEEP_UNKNOWN);
 
        /* Check for incompatible subcommands */
        verify_opt_mutually_compatible(me,
@@ -213,9 +214,6 @@ static void parse_args(int argc, const char **argv, struct replay_opts *opts)
                                NULL);
        }
 
-       else if (opts->commit_argc < 2)
-               usage_with_options(usage_str, options);
-
        if (opts->allow_ff)
                verify_opt_compatible(me, "--ff",
                                "--signoff", opts->signoff,
@@ -223,7 +221,20 @@ static void parse_args(int argc, const char **argv, struct replay_opts *opts)
                                "-x", opts->record_origin,
                                "--edit", opts->edit,
                                NULL);
-       opts->commit_argv = argv;
+
+       if (opts->subcommand != REPLAY_NONE) {
+               opts->revs = NULL;
+       } else {
+               opts->revs = xmalloc(sizeof(*opts->revs));
+               init_revisions(opts->revs, NULL);
+               opts->revs->no_walk = 1;
+               if (argc < 2)
+                       usage_with_options(usage_str, options);
+               argc = setup_revisions(argc, argv, opts->revs, NULL);
+       }
+
+       if (argc > 1)
+               usage_with_options(usage_str, options);
 }
 
 struct commit_message {
@@ -631,23 +642,15 @@ static int do_pick_commit(struct commit *commit, struct replay_opts *opts)
        return res;
 }
 
-static void prepare_revs(struct rev_info *revs, struct replay_opts *opts)
+static void prepare_revs(struct replay_opts *opts)
 {
-       int argc;
-
-       init_revisions(revs, NULL);
-       revs->no_walk = 1;
        if (opts->action != REVERT)
-               revs->reverse = 1;
-
-       argc = setup_revisions(opts->commit_argc, opts->commit_argv, revs, NULL);
-       if (argc > 1)
-               usage(*revert_or_cherry_pick_usage(opts));
+               opts->revs->reverse ^= 1;
 
-       if (prepare_revision_walk(revs))
+       if (prepare_revision_walk(opts->revs))
                die(_("revision walk setup failed"));
 
-       if (!revs->commits)
+       if (!opts->revs->commits)
                die(_("empty commit set passed"));
 }
 
@@ -844,14 +847,13 @@ static void read_populate_opts(struct replay_opts **opts_ptr)
 static void walk_revs_populate_todo(struct commit_list **todo_list,
                                struct replay_opts *opts)
 {
-       struct rev_info revs;
        struct commit *commit;
        struct commit_list **next;
 
-       prepare_revs(&revs, opts);
+       prepare_revs(opts);
 
        next = todo_list;
-       while ((commit = get_revision(&revs)))
+       while ((commit = get_revision(opts->revs)))
                next = commit_list_append(commit, next);
 }
 
@@ -942,7 +944,7 @@ static int sequencer_rollback(struct replay_opts *opts)
        }
        if (reset_for_rollback(sha1))
                goto fail;
-       remove_sequencer_state(1);
+       remove_sequencer_state();
        strbuf_release(&buf);
        return 0;
 fail:
@@ -1016,33 +1018,64 @@ static int pick_commits(struct commit_list *todo_list, struct replay_opts *opts)
        for (cur = todo_list; cur; cur = cur->next) {
                save_todo(cur, opts);
                res = do_pick_commit(cur->item, opts);
-               if (res) {
-                       if (!cur->next)
-                               /*
-                                * An error was encountered while
-                                * picking the last commit; the
-                                * sequencer state is useless now --
-                                * the user simply needs to resolve
-                                * the conflict and commit
-                                */
-                               remove_sequencer_state(0);
+               if (res)
                        return res;
-               }
        }
 
        /*
         * Sequence of picks finished successfully; cleanup by
         * removing the .git/sequencer directory
         */
-       remove_sequencer_state(1);
+       remove_sequencer_state();
        return 0;
 }
 
+static int continue_single_pick(void)
+{
+       const char *argv[] = { "commit", NULL };
+
+       if (!file_exists(git_path("CHERRY_PICK_HEAD")) &&
+           !file_exists(git_path("REVERT_HEAD")))
+               return error(_("no cherry-pick or revert in progress"));
+       return run_command_v_opt(argv, RUN_GIT_CMD);
+}
+
+static int sequencer_continue(struct replay_opts *opts)
+{
+       struct commit_list *todo_list = NULL;
+
+       if (!file_exists(git_path(SEQ_TODO_FILE)))
+               return continue_single_pick();
+       read_populate_opts(&opts);
+       read_populate_todo(&todo_list, opts);
+
+       /* Verify that the conflict has been resolved */
+       if (file_exists(git_path("CHERRY_PICK_HEAD")) ||
+           file_exists(git_path("REVERT_HEAD"))) {
+               int ret = continue_single_pick();
+               if (ret)
+                       return ret;
+       }
+       if (index_differs_from("HEAD", 0))
+               return error_dirty_index(opts);
+       todo_list = todo_list->next;
+       return pick_commits(todo_list, opts);
+}
+
+static int single_pick(struct commit *cmit, struct replay_opts *opts)
+{
+       setenv(GIT_REFLOG_ACTION, action_name(opts), 0);
+       return do_pick_commit(cmit, opts);
+}
+
 static int pick_revisions(struct replay_opts *opts)
 {
        struct commit_list *todo_list = NULL;
        unsigned char sha1[20];
 
+       if (opts->subcommand == REPLAY_NONE)
+               assert(opts->revs);
+
        read_and_refresh_cache(opts);
 
        /*
@@ -1051,21 +1084,32 @@ static int pick_revisions(struct replay_opts *opts)
         * one that is being continued
         */
        if (opts->subcommand == REPLAY_REMOVE_STATE) {
-               remove_sequencer_state(1);
+               remove_sequencer_state();
                return 0;
        }
        if (opts->subcommand == REPLAY_ROLLBACK)
                return sequencer_rollback(opts);
-       if (opts->subcommand == REPLAY_CONTINUE) {
-               if (!file_exists(git_path(SEQ_TODO_FILE)))
-                       return error(_("No %s in progress"), action_name(opts));
-               read_populate_opts(&opts);
-               read_populate_todo(&todo_list, opts);
-
-               /* Verify that the conflict has been resolved */
-               if (!index_differs_from("HEAD", 0))
-                       todo_list = todo_list->next;
-               return pick_commits(todo_list, opts);
+       if (opts->subcommand == REPLAY_CONTINUE)
+               return sequencer_continue(opts);
+
+       /*
+        * If we were called as "git cherry-pick <commit>", just
+        * cherry-pick/revert it, set CHERRY_PICK_HEAD /
+        * REVERT_HEAD, and don't touch the sequencer state.
+        * This means it is possible to cherry-pick in the middle
+        * of a cherry-pick sequence.
+        */
+       if (opts->revs->cmdline.nr == 1 &&
+           opts->revs->cmdline.rev->whence == REV_CMD_REV &&
+           opts->revs->no_walk &&
+           !opts->revs->cmdline.rev->flags) {
+               struct commit *cmit;
+               if (prepare_revision_walk(opts->revs))
+                       die(_("revision walk setup failed"));
+               cmit = get_revision(opts->revs);
+               if (!cmit || get_revision(opts->revs))
+                       die("BUG: expected exactly one commit from walk");
+               return single_pick(cmit, opts);
        }
 
        /*