From 5291828df8386ebeb01039d1403d9f845d2f6e20 Mon Sep 17 00:00:00 2001 From: Elijah Newren Date: Sat, 20 Mar 2021 00:03:52 +0000 Subject: [PATCH] merge-ort: write $GIT_DIR/AUTO_MERGE whenever we hit a conflict There are a variety of questions users might ask while resolving conflicts: * What changes have been made since the previous (first) parent? * What changes are staged? * What is still unstaged? (or what is still conflicted?) * What changes did I make to resolve conflicts so far? The first three of these have simple answers: * git diff HEAD * git diff --cached * git diff There was no way to answer the final question previously. Adding one is trivial in merge-ort, since it works by creating a tree representing what should be written to the working copy complete with conflict markers. Simply write that tree to .git/AUTO_MERGE, allowing users to answer the fourth question with * git diff AUTO_MERGE I avoided using a name like "MERGE_AUTO", because that would be merge-specific (much like MERGE_HEAD, REBASE_HEAD, REVERT_HEAD, CHERRY_PICK_HEAD) and I wanted a name that didn't change depending on which type of operation the merge was part of. Ensure that paths which clean out other temporary operation-specific files (e.g. CHERRY_PICK_HEAD, MERGE_MSG, rebase-merge/ state directory) also clean out this AUTO_MERGE file. Signed-off-by: Elijah Newren Reviewed-by: Derrick Stolee Signed-off-by: Junio C Hamano --- branch.c | 1 + builtin/rebase.c | 1 + merge-ort.c | 10 ++++++++++ path.c | 1 + path.h | 2 ++ sequencer.c | 5 +++++ 6 files changed, 20 insertions(+) diff --git a/branch.c b/branch.c index 9c9dae1eae..b71a2de29d 100644 --- a/branch.c +++ b/branch.c @@ -344,6 +344,7 @@ void remove_merge_branch_state(struct repository *r) unlink(git_path_merge_rr(r)); unlink(git_path_merge_msg(r)); unlink(git_path_merge_mode(r)); + unlink(git_path_auto_merge(r)); save_autostash(git_path_merge_autostash(r)); } diff --git a/builtin/rebase.c b/builtin/rebase.c index 840dbd7eb7..6c252d6275 100644 --- a/builtin/rebase.c +++ b/builtin/rebase.c @@ -737,6 +737,7 @@ static int finish_rebase(struct rebase_options *opts) int ret = 0; delete_ref(NULL, "REBASE_HEAD", NULL, REF_NO_DEREF); + unlink(git_path_auto_merge(the_repository)); apply_autostash(state_dir_path("autostash", opts)); close_object_store(the_repository->objects); /* diff --git a/merge-ort.c b/merge-ort.c index 303e894142..e8f1a435f9 100644 --- a/merge-ort.c +++ b/merge-ort.c @@ -3496,6 +3496,9 @@ void merge_switch_to_result(struct merge_options *opt, { assert(opt->priv == NULL); if (result->clean >= 0 && update_worktree_and_index) { + const char *filename; + FILE *fp; + trace2_region_enter("merge", "checkout", opt->repo); if (checkout(opt, head, result->tree)) { /* failure to function */ @@ -3514,6 +3517,13 @@ void merge_switch_to_result(struct merge_options *opt, } opt->priv = NULL; trace2_region_leave("merge", "record_conflicted", opt->repo); + + trace2_region_enter("merge", "write_auto_merge", opt->repo); + filename = git_path_auto_merge(opt->repo); + fp = xfopen(filename, "w"); + fprintf(fp, "%s\n", oid_to_hex(&result->tree->object.oid)); + fclose(fp); + trace2_region_leave("merge", "write_auto_merge", opt->repo); } if (display_update_msgs) { diff --git a/path.c b/path.c index 7b385e5eb2..9e883eb524 100644 --- a/path.c +++ b/path.c @@ -1534,5 +1534,6 @@ REPO_GIT_PATH_FUNC(merge_rr, "MERGE_RR") REPO_GIT_PATH_FUNC(merge_mode, "MERGE_MODE") REPO_GIT_PATH_FUNC(merge_head, "MERGE_HEAD") REPO_GIT_PATH_FUNC(merge_autostash, "MERGE_AUTOSTASH") +REPO_GIT_PATH_FUNC(auto_merge, "AUTO_MERGE") REPO_GIT_PATH_FUNC(fetch_head, "FETCH_HEAD") REPO_GIT_PATH_FUNC(shallow, "shallow") diff --git a/path.h b/path.h index e7e77da6aa..251c78d980 100644 --- a/path.h +++ b/path.h @@ -176,6 +176,7 @@ struct path_cache { const char *merge_mode; const char *merge_head; const char *merge_autostash; + const char *auto_merge; const char *fetch_head; const char *shallow; }; @@ -191,6 +192,7 @@ const char *git_path_merge_rr(struct repository *r); const char *git_path_merge_mode(struct repository *r); const char *git_path_merge_head(struct repository *r); const char *git_path_merge_autostash(struct repository *r); +const char *git_path_auto_merge(struct repository *r); const char *git_path_fetch_head(struct repository *r); const char *git_path_shallow(struct repository *r); diff --git a/sequencer.c b/sequencer.c index d2332d3e17..472cdd8c62 100644 --- a/sequencer.c +++ b/sequencer.c @@ -2096,6 +2096,7 @@ static int do_pick_commit(struct repository *r, refs_delete_ref(get_main_ref_store(r), "", "CHERRY_PICK_HEAD", NULL, 0); unlink(git_path_merge_msg(r)); + unlink(git_path_auto_merge(r)); fprintf(stderr, _("dropping %s %s -- patch contents already upstream\n"), oid_to_hex(&commit->object.oid), msg.subject); @@ -2451,6 +2452,8 @@ void sequencer_post_commit_cleanup(struct repository *r, int verbose) need_cleanup = 1; } + unlink(git_path_auto_merge(r)); + if (!need_cleanup) return; @@ -4111,6 +4114,7 @@ static int pick_commits(struct repository *r, unlink(rebase_path_stopped_sha()); unlink(rebase_path_amend()); unlink(git_path_merge_head(r)); + unlink(git_path_auto_merge(r)); delete_ref(NULL, "REBASE_HEAD", NULL, REF_NO_DEREF); if (item->command == TODO_BREAK) { @@ -4505,6 +4509,7 @@ static int commit_staged_changes(struct repository *r, return error(_("could not commit staged changes.")); unlink(rebase_path_amend()); unlink(git_path_merge_head(r)); + unlink(git_path_auto_merge(r)); if (final_fixup) { unlink(rebase_path_fixup_msg()); unlink(rebase_path_squash_msg());