builtin/merge.c: remove "remoteheads" global variable

Instead pass it around starting from the toplevel cmd_merge()
as an explicit parameter.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/merge.c b/builtin/merge.c
index 5126443fdfe1dc5113943dd3099ab8d87d84887e..c5ca70b5a274a0d0dbe2f89d7a2cb57b0698a2eb 100644 (file)
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -52,7 +52,6 @@ static int fast_forward_only, option_edit = -1;
 static int allow_trivial = 1, have_message;
 static int overwrite_ignore = 1;
 static struct strbuf merge_msg = STRBUF_INIT;
-static struct commit_list *remoteheads;
 static struct strategy **use_strategies;
 static size_t use_strategies_nr, use_strategies_alloc;
 static const char **xopts;
@@ -318,7 +317,7 @@ static void finish_up_to_date(const char *msg)
        drop_save();
 }
 
-static void squash_message(struct commit *commit)
+static void squash_message(struct commit *commit, struct commit_list *remoteheads)
 {
        struct rev_info rev;
        struct strbuf out = STRBUF_INIT;
@@ -366,6 +365,7 @@ static void squash_message(struct commit *commit)
 }
 
 static void finish(struct commit *head_commit,
+                  struct commit_list *remoteheads,
                   const unsigned char *new_head, const char *msg)
 {
        struct strbuf reflog_message = STRBUF_INIT;
@@ -380,7 +380,7 @@ static void finish(struct commit *head_commit,
                        getenv("GIT_REFLOG_ACTION"), msg);
        }
        if (squash) {
-               squash_message(head_commit);
+               squash_message(head_commit, remoteheads);
        } else {
                if (verbosity >= 0 && !merge_msg.len)
                        printf(_("No merge message -- not updating HEAD\n"));
@@ -681,6 +681,7 @@ int try_merge_command(const char *strategy, size_t xopts_nr,
 }
 
 static int try_merge_strategy(const char *strategy, struct commit_list *common,
+                             struct commit_list *remoteheads,
                              struct commit *head, const char *head_arg)
 {
        int index_fd;
@@ -874,14 +875,14 @@ static void read_merge_msg(struct strbuf *msg)
                die_errno(_("Could not read from '%s'"), filename);
 }
 
-static void write_merge_state(void);
-static void abort_commit(const char *err_msg)
+static void write_merge_state(struct commit_list *);
+static void abort_commit(struct commit_list *remoteheads, const char *err_msg)
 {
        if (err_msg)
                error("%s", err_msg);
        fprintf(stderr,
                _("Not committing merge; use 'git commit' to complete the merge.\n"));
-       write_merge_state();
+       write_merge_state(remoteheads);
        exit(1);
 }
 
@@ -892,7 +893,7 @@ N_("Please enter a commit message to explain why this merge is necessary,\n"
    "Lines starting with '#' will be ignored, and an empty message aborts\n"
    "the commit.\n");
 
-static void prepare_to_commit(void)
+static void prepare_to_commit(struct commit_list *remoteheads)
 {
        struct strbuf msg = STRBUF_INIT;
        const char *comment = _(merge_editor_comment);
@@ -905,18 +906,18 @@ static void prepare_to_commit(void)
                 git_path("MERGE_MSG"), "merge", NULL, NULL);
        if (option_edit) {
                if (launch_editor(git_path("MERGE_MSG"), NULL, NULL))
-                       abort_commit(NULL);
+                       abort_commit(remoteheads, NULL);
        }
        read_merge_msg(&msg);
        stripspace(&msg, option_edit);
        if (!msg.len)
-               abort_commit(_("Empty commit message."));
+               abort_commit(remoteheads, _("Empty commit message."));
        strbuf_release(&merge_msg);
        strbuf_addbuf(&merge_msg, &msg);
        strbuf_release(&msg);
 }
 
-static int merge_trivial(struct commit *head)
+static int merge_trivial(struct commit *head, struct commit_list *remoteheads)
 {
        unsigned char result_tree[20], result_commit[20];
        struct commit_list *parent = xmalloc(sizeof(*parent));
@@ -927,17 +928,18 @@ static int merge_trivial(struct commit *head)
        parent->next = xmalloc(sizeof(*parent->next));
        parent->next->item = remoteheads->item;
        parent->next->next = NULL;
-       prepare_to_commit();
+       prepare_to_commit(remoteheads);
        if (commit_tree(&merge_msg, result_tree, parent, result_commit, NULL,
                        sign_commit))
                die(_("failed to write commit object"));
-       finish(head, result_commit, "In-index merge");
+       finish(head, remoteheads, result_commit, "In-index merge");
        drop_save();
        return 0;
 }
 
 static int finish_automerge(struct commit *head,
                            struct commit_list *common,
+                           struct commit_list *remoteheads,
                            unsigned char *result_tree,
                            const char *wt_strategy)
 {
@@ -959,13 +961,13 @@ static int finish_automerge(struct commit *head,
                        pptr = &commit_list_insert(j->item, pptr)->next;
        }
        strbuf_addch(&merge_msg, '\n');
-       prepare_to_commit();
+       prepare_to_commit(remoteheads);
        free_commit_list(remoteheads);
        if (commit_tree(&merge_msg, result_tree, parents, result_commit,
                        NULL, sign_commit))
                die(_("failed to write commit object"));
        strbuf_addf(&buf, "Merge made by the '%s' strategy.", wt_strategy);
-       finish(head, result_commit, buf.buf);
+       finish(head, remoteheads, result_commit, buf.buf);
        strbuf_release(&buf);
        drop_save();
        return 0;
@@ -1070,7 +1072,7 @@ static int setup_with_upstream(const char ***argv)
        return i;
 }
 
-static void write_merge_state(void)
+static void write_merge_state(struct commit_list *remoteheads)
 {
        const char *filename;
        int fd;
@@ -1148,6 +1150,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
        int best_cnt = -1, merge_was_ok = 0, automerge_was_ok = 0;
        struct commit_list *common = NULL;
        const char *best_strategy = NULL, *wt_strategy = NULL;
+       struct commit_list *remoteheads = NULL;
        struct commit_list **remotes = &remoteheads;
        void *branch_to_free;
 
@@ -1400,7 +1403,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                        goto done;
                }
 
-               finish(head_commit, commit->object.sha1, msg.buf);
+               finish(head_commit, remoteheads, commit->object.sha1, msg.buf);
                drop_save();
                goto done;
        } else if (!remoteheads->next && common->next)
@@ -1422,7 +1425,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                        if (!read_tree_trivial(common->item->object.sha1,
                                               head_commit->object.sha1,
                                               remoteheads->item->object.sha1)) {
-                               ret = merge_trivial(head_commit);
+                               ret = merge_trivial(head_commit, remoteheads);
                                goto done;
                        }
                        printf(_("Nope.\n"));
@@ -1493,7 +1496,8 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                wt_strategy = use_strategies[i]->name;
 
                ret = try_merge_strategy(use_strategies[i]->name,
-                                        common, head_commit, head_arg);
+                                        common, remoteheads,
+                                        head_commit, head_arg);
                if (!option_commit && !ret) {
                        merge_was_ok = 1;
                        /*
@@ -1535,8 +1539,8 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
         * auto resolved the merge cleanly.
         */
        if (automerge_was_ok) {
-               ret = finish_automerge(head_commit, common, result_tree,
-                                      wt_strategy);
+               ret = finish_automerge(head_commit, common, remoteheads,
+                                      result_tree, wt_strategy);
                goto done;
        }
 
@@ -1561,13 +1565,14 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                restore_state(head_commit->object.sha1, stash);
                printf(_("Using the %s to prepare resolving by hand.\n"),
                        best_strategy);
-               try_merge_strategy(best_strategy, common, head_commit, head_arg);
+               try_merge_strategy(best_strategy, common, remoteheads,
+                                  head_commit, head_arg);
        }
 
        if (squash)
-               finish(head_commit, NULL, NULL);
+               finish(head_commit, remoteheads, NULL, NULL);
        else
-               write_merge_state();
+               write_merge_state(remoteheads);
 
        if (merge_was_ok)
                fprintf(stderr, _("Automatic merge went well; "