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authorJohan Herland <johan@herland.net>2010-11-09 22:49:52 +0100
committerJunio C Hamano <gitster@pobox.com>2010-11-17 13:22:49 -0800
commit6abb3655efe364cf0375b5cdae2729af7562ed45 (patch)
tree71cd673957836ee63fd0a3ca6271dab5716d9454 /builtin/notes.c
parent809f38c8abacdbeb7015fdeef03931568c7fddda (diff)
downloadgit-6abb3655efe364cf0375b5cdae2729af7562ed45.tar.gz
git-6abb3655efe364cf0375b5cdae2729af7562ed45.tar.xz
git notes merge: Manual conflict resolution, part 2/2
When the notes merge conflicts in .git/NOTES_MERGE_WORKTREE have been resolved, we need to record a new notes commit on the appropriate notes ref with the resolved notes. This patch implements 'git notes merge --commit' which the user should run after resolving conflicts in the notes merge worktree. This command finalizes the notes merge by recombining the partial notes tree from part 1 with the now-resolved conflicts in the notes merge worktree in a merge commit, and updating the appropriate ref to this merge commit. In order to correctly finalize the merge, we need to keep track of three things: - The partial merge result from part 1, containing the auto-merged notes. This is now stored into a ref called .git/NOTES_MERGE_PARTIAL. - The unmerged notes. These are already stored in .git/NOTES_MERGE_WORKTREE, thanks to part 1. - The notes ref to be updated by the finalized merge result. This is now stored in a symref called .git/NOTES_MERGE_REF. In addition to "git notes merge --commit", which uses the above details to create the finalized notes merge commit, this patch also implements "git notes merge --reset", which aborts the ongoing notes merge by simply removing the files/directory described above. FTR, "git notes merge --commit" reuses "git notes merge --reset" to remove the information described above (.git/NOTES_MERGE_*) after the notes merge have been successfully finalized. The patch also contains documentation and testcases for the two new options. This patch has been improved by the following contributions: - Ævar Arnfjörð Bjarmason: Fix nonsense sentence in --commit description - Sverre Rabbelier: Rename --reset to --abort Thanks-to: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Thanks-to: Sverre Rabbelier <srabbelier@gmail.com> Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'builtin/notes.c')
-rw-r--r--builtin/notes.c106
1 files changed, 103 insertions, 3 deletions
diff --git a/builtin/notes.c b/builtin/notes.c
index 309edc741..b5385238e 100644
--- a/builtin/notes.c
+++ b/builtin/notes.c
@@ -27,6 +27,8 @@ static const char * const git_notes_usage[] = {
"git notes [--ref <notes_ref>] edit [<object>]",
"git notes [--ref <notes_ref>] show [<object>]",
"git notes [--ref <notes_ref>] merge [-v | -q] [-s <strategy> ] <notes_ref>",
+ "git notes merge --commit [-v | -q]",
+ "git notes merge --abort [-v | -q]",
"git notes [--ref <notes_ref>] remove [<object>]",
"git notes [--ref <notes_ref>] prune [-n | -v]",
NULL
@@ -65,6 +67,8 @@ static const char * const git_notes_show_usage[] = {
static const char * const git_notes_merge_usage[] = {
"git notes merge [<options>] <notes_ref>",
+ "git notes merge --commit [<options>]",
+ "git notes merge --abort [<options>]",
NULL
};
@@ -761,33 +765,119 @@ static int show(int argc, const char **argv, const char *prefix)
return retval;
}
+static int merge_abort(struct notes_merge_options *o)
+{
+ int ret = 0;
+
+ /*
+ * Remove .git/NOTES_MERGE_PARTIAL and .git/NOTES_MERGE_REF, and call
+ * notes_merge_abort() to remove .git/NOTES_MERGE_WORKTREE.
+ */
+
+ if (delete_ref("NOTES_MERGE_PARTIAL", NULL, 0))
+ ret += error("Failed to delete ref NOTES_MERGE_PARTIAL");
+ if (delete_ref("NOTES_MERGE_REF", NULL, REF_NODEREF))
+ ret += error("Failed to delete ref NOTES_MERGE_REF");
+ if (notes_merge_abort(o))
+ ret += error("Failed to remove 'git notes merge' worktree");
+ return ret;
+}
+
+static int merge_commit(struct notes_merge_options *o)
+{
+ struct strbuf msg = STRBUF_INIT;
+ unsigned char sha1[20];
+ struct notes_tree *t;
+ struct commit *partial;
+ struct pretty_print_context pretty_ctx;
+
+ /*
+ * Read partial merge result from .git/NOTES_MERGE_PARTIAL,
+ * and target notes ref from .git/NOTES_MERGE_REF.
+ */
+
+ if (get_sha1("NOTES_MERGE_PARTIAL", sha1))
+ die("Failed to read ref NOTES_MERGE_PARTIAL");
+ else if (!(partial = lookup_commit_reference(sha1)))
+ die("Could not find commit from NOTES_MERGE_PARTIAL.");
+ else if (parse_commit(partial))
+ die("Could not parse commit from NOTES_MERGE_PARTIAL.");
+
+ t = xcalloc(1, sizeof(struct notes_tree));
+ init_notes(t, "NOTES_MERGE_PARTIAL", combine_notes_overwrite, 0);
+
+ o->local_ref = resolve_ref("NOTES_MERGE_REF", sha1, 0, 0);
+ if (!o->local_ref)
+ die("Failed to resolve NOTES_MERGE_REF");
+
+ if (notes_merge_commit(o, t, partial, sha1))
+ die("Failed to finalize notes merge");
+
+ /* Reuse existing commit message in reflog message */
+ memset(&pretty_ctx, 0, sizeof(pretty_ctx));
+ format_commit_message(partial, "%s", &msg, &pretty_ctx);
+ strbuf_trim(&msg);
+ strbuf_insert(&msg, 0, "notes: ", 7);
+ update_ref(msg.buf, o->local_ref, sha1, NULL, 0, DIE_ON_ERR);
+
+ free_notes(t);
+ strbuf_release(&msg);
+ return merge_abort(o);
+}
+
static int merge(int argc, const char **argv, const char *prefix)
{
struct strbuf remote_ref = STRBUF_INIT, msg = STRBUF_INIT;
unsigned char result_sha1[20];
struct notes_tree *t;
struct notes_merge_options o;
+ int do_merge = 0, do_commit = 0, do_abort = 0;
int verbosity = 0, result;
const char *strategy = NULL;
struct option options[] = {
+ OPT_GROUP("General options"),
OPT__VERBOSITY(&verbosity),
+ OPT_GROUP("Merge options"),
OPT_STRING('s', "strategy", &strategy, "strategy",
"resolve notes conflicts using the given "
"strategy (manual/ours/theirs/union)"),
+ OPT_GROUP("Committing unmerged notes"),
+ { OPTION_BOOLEAN, 0, "commit", &do_commit, NULL,
+ "finalize notes merge by committing unmerged notes",
+ PARSE_OPT_NOARG | PARSE_OPT_NONEG },
+ OPT_GROUP("Aborting notes merge resolution"),
+ { OPTION_BOOLEAN, 0, "abort", &do_abort, NULL,
+ "abort notes merge",
+ PARSE_OPT_NOARG | PARSE_OPT_NONEG },
OPT_END()
};
argc = parse_options(argc, argv, prefix, options,
git_notes_merge_usage, 0);
- if (argc != 1) {
+ if (strategy || do_commit + do_abort == 0)
+ do_merge = 1;
+ if (do_merge + do_commit + do_abort != 1) {
+ error("cannot mix --commit, --abort or -s/--strategy");
+ usage_with_options(git_notes_merge_usage, options);
+ }
+
+ if (do_merge && argc != 1) {
error("Must specify a notes ref to merge");
usage_with_options(git_notes_merge_usage, options);
+ } else if (!do_merge && argc) {
+ error("too many parameters");
+ usage_with_options(git_notes_merge_usage, options);
}
init_notes_merge_options(&o);
o.verbosity = verbosity + NOTES_MERGE_VERBOSITY_DEFAULT;
+ if (do_abort)
+ return merge_abort(&o);
+ if (do_commit)
+ return merge_commit(&o);
+
o.local_ref = default_notes_ref();
strbuf_addstr(&remote_ref, argv[0]);
expand_notes_ref(&remote_ref);
@@ -820,9 +910,19 @@ static int merge(int argc, const char **argv, const char *prefix)
/* Update default notes ref with new commit */
update_ref(msg.buf, default_notes_ref(), result_sha1, NULL,
0, DIE_ON_ERR);
- else /* Merge has unresolved conflicts */
- printf("Automatic notes merge failed. Fix conflicts in %s.\n",
+ else { /* Merge has unresolved conflicts */
+ /* Update .git/NOTES_MERGE_PARTIAL with partial merge result */
+ update_ref(msg.buf, "NOTES_MERGE_PARTIAL", result_sha1, NULL,
+ 0, DIE_ON_ERR);
+ /* Store ref-to-be-updated into .git/NOTES_MERGE_REF */
+ if (create_symref("NOTES_MERGE_REF", default_notes_ref(), NULL))
+ die("Failed to store link to current notes ref (%s)",
+ default_notes_ref());
+ printf("Automatic notes merge failed. Fix conflicts in %s and "
+ "commit the result with 'git notes merge --commit', or "
+ "abort the merge with 'git notes merge --abort'.\n",
git_path(NOTES_MERGE_WORKTREE));
+ }
free_notes(t);
strbuf_release(&remote_ref);