Merge branch 'js/rebase-am'
Instead of going through "git-rebase--am" scriptlet to use the "am"
backend, the built-in version of "git rebase" learned to drive the
"am" backend directly.
* js/rebase-am:
built-in rebase: call `git am` directly
rebase: teach `reset_head()` to optionally skip the worktree
rebase: avoid double reflog entry when switching branches
rebase: move `reset_head()` into a better spot
diff --git a/builtin/rebase.c b/builtin/rebase.c
index 3f9b26f..8d49e53 100644
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -244,6 +244,37 @@
return 0;
}
+static int write_basic_state(struct rebase_options *opts)
+{
+ write_file(state_dir_path("head-name", opts), "%s",
+ opts->head_name ? opts->head_name : "detached HEAD");
+ write_file(state_dir_path("onto", opts), "%s",
+ opts->onto ? oid_to_hex(&opts->onto->object.oid) : "");
+ write_file(state_dir_path("orig-head", opts), "%s",
+ oid_to_hex(&opts->orig_head));
+ write_file(state_dir_path("quiet", opts), "%s",
+ opts->flags & REBASE_NO_QUIET ? "" : "t");
+ if (opts->flags & REBASE_VERBOSE)
+ write_file(state_dir_path("verbose", opts), "%s", "");
+ if (opts->strategy)
+ write_file(state_dir_path("strategy", opts), "%s",
+ opts->strategy);
+ if (opts->strategy_opts)
+ write_file(state_dir_path("strategy_opts", opts), "%s",
+ opts->strategy_opts);
+ if (opts->allow_rerere_autoupdate >= 0)
+ write_file(state_dir_path("allow_rerere_autoupdate", opts),
+ "-%s-rerere-autoupdate",
+ opts->allow_rerere_autoupdate ? "" : "-no");
+ if (opts->gpg_sign_opt)
+ write_file(state_dir_path("gpg_sign_opt", opts), "%s",
+ opts->gpg_sign_opt);
+ if (opts->signoff)
+ write_file(state_dir_path("strategy", opts), "--signoff");
+
+ return 0;
+}
+
static int apply_autostash(struct rebase_options *opts)
{
const char *path = state_dir_path("autostash", opts);
@@ -331,6 +362,161 @@
}
}
+#define GIT_REFLOG_ACTION_ENVIRONMENT "GIT_REFLOG_ACTION"
+
+#define RESET_HEAD_DETACH (1<<0)
+#define RESET_HEAD_HARD (1<<1)
+#define RESET_HEAD_RUN_POST_CHECKOUT_HOOK (1<<2)
+#define RESET_HEAD_REFS_ONLY (1<<3)
+
+static int reset_head(struct object_id *oid, const char *action,
+ const char *switch_to_branch, unsigned flags,
+ const char *reflog_orig_head, const char *reflog_head)
+{
+ unsigned detach_head = flags & RESET_HEAD_DETACH;
+ unsigned reset_hard = flags & RESET_HEAD_HARD;
+ unsigned run_hook = flags & RESET_HEAD_RUN_POST_CHECKOUT_HOOK;
+ unsigned refs_only = flags & RESET_HEAD_REFS_ONLY;
+ struct object_id head_oid;
+ struct tree_desc desc[2] = { { NULL }, { NULL } };
+ struct lock_file lock = LOCK_INIT;
+ struct unpack_trees_options unpack_tree_opts;
+ struct tree *tree;
+ const char *reflog_action;
+ struct strbuf msg = STRBUF_INIT;
+ size_t prefix_len;
+ struct object_id *orig = NULL, oid_orig,
+ *old_orig = NULL, oid_old_orig;
+ int ret = 0, nr = 0;
+
+ if (switch_to_branch && !starts_with(switch_to_branch, "refs/"))
+ BUG("Not a fully qualified branch: '%s'", switch_to_branch);
+
+ if (!refs_only && hold_locked_index(&lock, LOCK_REPORT_ON_ERROR) < 0) {
+ ret = -1;
+ goto leave_reset_head;
+ }
+
+ if ((!oid || !reset_hard) && get_oid("HEAD", &head_oid)) {
+ ret = error(_("could not determine HEAD revision"));
+ goto leave_reset_head;
+ }
+
+ if (!oid)
+ oid = &head_oid;
+
+ if (refs_only)
+ goto reset_head_refs;
+
+ memset(&unpack_tree_opts, 0, sizeof(unpack_tree_opts));
+ setup_unpack_trees_porcelain(&unpack_tree_opts, action);
+ unpack_tree_opts.head_idx = 1;
+ unpack_tree_opts.src_index = the_repository->index;
+ unpack_tree_opts.dst_index = the_repository->index;
+ unpack_tree_opts.fn = reset_hard ? oneway_merge : twoway_merge;
+ unpack_tree_opts.update = 1;
+ unpack_tree_opts.merge = 1;
+ if (!detach_head)
+ unpack_tree_opts.reset = 1;
+
+ if (read_index_unmerged(the_repository->index) < 0) {
+ ret = error(_("could not read index"));
+ goto leave_reset_head;
+ }
+
+ if (!reset_hard && !fill_tree_descriptor(&desc[nr++], &head_oid)) {
+ ret = error(_("failed to find tree of %s"),
+ oid_to_hex(&head_oid));
+ goto leave_reset_head;
+ }
+
+ if (!fill_tree_descriptor(&desc[nr++], oid)) {
+ ret = error(_("failed to find tree of %s"), oid_to_hex(oid));
+ goto leave_reset_head;
+ }
+
+ if (unpack_trees(nr, desc, &unpack_tree_opts)) {
+ ret = -1;
+ goto leave_reset_head;
+ }
+
+ tree = parse_tree_indirect(oid);
+ prime_cache_tree(the_repository, the_repository->index, tree);
+
+ if (write_locked_index(the_repository->index, &lock, COMMIT_LOCK) < 0) {
+ ret = error(_("could not write index"));
+ goto leave_reset_head;
+ }
+
+reset_head_refs:
+ reflog_action = getenv(GIT_REFLOG_ACTION_ENVIRONMENT);
+ strbuf_addf(&msg, "%s: ", reflog_action ? reflog_action : "rebase");
+ prefix_len = msg.len;
+
+ if (!get_oid("ORIG_HEAD", &oid_old_orig))
+ old_orig = &oid_old_orig;
+ if (!get_oid("HEAD", &oid_orig)) {
+ orig = &oid_orig;
+ if (!reflog_orig_head) {
+ strbuf_addstr(&msg, "updating ORIG_HEAD");
+ reflog_orig_head = msg.buf;
+ }
+ update_ref(reflog_orig_head, "ORIG_HEAD", orig, old_orig, 0,
+ UPDATE_REFS_MSG_ON_ERR);
+ } else if (old_orig)
+ delete_ref(NULL, "ORIG_HEAD", old_orig, 0);
+ if (!reflog_head) {
+ strbuf_setlen(&msg, prefix_len);
+ strbuf_addstr(&msg, "updating HEAD");
+ reflog_head = msg.buf;
+ }
+ if (!switch_to_branch)
+ ret = update_ref(reflog_head, "HEAD", oid, orig,
+ detach_head ? REF_NO_DEREF : 0,
+ UPDATE_REFS_MSG_ON_ERR);
+ else {
+ ret = update_ref(reflog_orig_head, switch_to_branch, oid,
+ NULL, 0, UPDATE_REFS_MSG_ON_ERR);
+ if (!ret)
+ ret = create_symref("HEAD", switch_to_branch,
+ reflog_head);
+ }
+ if (run_hook)
+ run_hook_le(NULL, "post-checkout",
+ oid_to_hex(orig ? orig : &null_oid),
+ oid_to_hex(oid), "1", NULL);
+
+leave_reset_head:
+ strbuf_release(&msg);
+ rollback_lock_file(&lock);
+ while (nr)
+ free((void *)desc[--nr].buffer);
+ return ret;
+}
+
+static int move_to_original_branch(struct rebase_options *opts)
+{
+ struct strbuf orig_head_reflog = STRBUF_INIT, head_reflog = STRBUF_INIT;
+ int ret;
+
+ if (!opts->head_name)
+ return 0; /* nothing to move back to */
+
+ if (!opts->onto)
+ BUG("move_to_original_branch without onto");
+
+ strbuf_addf(&orig_head_reflog, "rebase finished: %s onto %s",
+ opts->head_name, oid_to_hex(&opts->onto->object.oid));
+ strbuf_addf(&head_reflog, "rebase finished: returning to %s",
+ opts->head_name);
+ ret = reset_head(NULL, "", opts->head_name, RESET_HEAD_REFS_ONLY,
+ orig_head_reflog.buf, head_reflog.buf);
+
+ strbuf_release(&orig_head_reflog);
+ strbuf_release(&head_reflog);
+ return ret;
+}
+
static const char *resolvemsg =
N_("Resolve all conflicts manually, mark them as resolved with\n"
"\"git add/rm <conflicted_files>\", then run \"git rebase --continue\".\n"
@@ -338,6 +524,126 @@
"To abort and get back to the state before \"git rebase\", run "
"\"git rebase --abort\".");
+static int run_am(struct rebase_options *opts)
+{
+ struct child_process am = CHILD_PROCESS_INIT;
+ struct child_process format_patch = CHILD_PROCESS_INIT;
+ struct strbuf revisions = STRBUF_INIT;
+ int status;
+ char *rebased_patches;
+
+ am.git_cmd = 1;
+ argv_array_push(&am.args, "am");
+
+ if (opts->action && !strcmp("continue", opts->action)) {
+ argv_array_push(&am.args, "--resolved");
+ argv_array_pushf(&am.args, "--resolvemsg=%s", resolvemsg);
+ if (opts->gpg_sign_opt)
+ argv_array_push(&am.args, opts->gpg_sign_opt);
+ status = run_command(&am);
+ if (status)
+ return status;
+
+ return move_to_original_branch(opts);
+ }
+ if (opts->action && !strcmp("skip", opts->action)) {
+ argv_array_push(&am.args, "--skip");
+ argv_array_pushf(&am.args, "--resolvemsg=%s", resolvemsg);
+ status = run_command(&am);
+ if (status)
+ return status;
+
+ return move_to_original_branch(opts);
+ }
+ if (opts->action && !strcmp("show-current-patch", opts->action)) {
+ argv_array_push(&am.args, "--show-current-patch");
+ return run_command(&am);
+ }
+
+ strbuf_addf(&revisions, "%s...%s",
+ oid_to_hex(opts->root ?
+ /* this is now equivalent to !opts->upstream */
+ &opts->onto->object.oid :
+ &opts->upstream->object.oid),
+ oid_to_hex(&opts->orig_head));
+
+ rebased_patches = xstrdup(git_path("rebased-patches"));
+ format_patch.out = open(rebased_patches,
+ O_WRONLY | O_CREAT | O_TRUNC, 0666);
+ if (format_patch.out < 0) {
+ status = error_errno(_("could not open '%s' for writing"),
+ rebased_patches);
+ free(rebased_patches);
+ argv_array_clear(&am.args);
+ return status;
+ }
+
+ format_patch.git_cmd = 1;
+ argv_array_pushl(&format_patch.args, "format-patch", "-k", "--stdout",
+ "--full-index", "--cherry-pick", "--right-only",
+ "--src-prefix=a/", "--dst-prefix=b/", "--no-renames",
+ "--no-cover-letter", "--pretty=mboxrd", "--topo-order", NULL);
+ if (opts->git_format_patch_opt.len)
+ argv_array_split(&format_patch.args,
+ opts->git_format_patch_opt.buf);
+ argv_array_push(&format_patch.args, revisions.buf);
+ if (opts->restrict_revision)
+ argv_array_pushf(&format_patch.args, "^%s",
+ oid_to_hex(&opts->restrict_revision->object.oid));
+
+ status = run_command(&format_patch);
+ if (status) {
+ unlink(rebased_patches);
+ free(rebased_patches);
+ argv_array_clear(&am.args);
+
+ reset_head(&opts->orig_head, "checkout", opts->head_name, 0,
+ "HEAD", NULL);
+ error(_("\ngit encountered an error while preparing the "
+ "patches to replay\n"
+ "these revisions:\n"
+ "\n %s\n\n"
+ "As a result, git cannot rebase them."),
+ opts->revisions);
+
+ strbuf_release(&revisions);
+ return status;
+ }
+ strbuf_release(&revisions);
+
+ am.in = open(rebased_patches, O_RDONLY);
+ if (am.in < 0) {
+ status = error_errno(_("could not open '%s' for reading"),
+ rebased_patches);
+ free(rebased_patches);
+ argv_array_clear(&am.args);
+ return status;
+ }
+
+ argv_array_pushv(&am.args, opts->git_am_opts.argv);
+ argv_array_push(&am.args, "--rebasing");
+ argv_array_pushf(&am.args, "--resolvemsg=%s", resolvemsg);
+ argv_array_push(&am.args, "--patch-format=mboxrd");
+ if (opts->allow_rerere_autoupdate > 0)
+ argv_array_push(&am.args, "--rerere-autoupdate");
+ else if (opts->allow_rerere_autoupdate == 0)
+ argv_array_push(&am.args, "--no-rerere-autoupdate");
+ if (opts->gpg_sign_opt)
+ argv_array_push(&am.args, opts->gpg_sign_opt);
+ status = run_command(&am);
+ unlink(rebased_patches);
+ free(rebased_patches);
+
+ if (!status) {
+ return move_to_original_branch(opts);
+ }
+
+ if (is_directory(opts->state_dir))
+ write_basic_state(opts);
+
+ return status;
+}
+
static int run_specific_rebase(struct rebase_options *opts)
{
const char *argv[] = { NULL, NULL };
@@ -421,6 +727,11 @@
goto finished_rebase;
}
+ if (opts->type == REBASE_AM) {
+ status = run_am(opts);
+ goto finished_rebase;
+ }
+
add_var(&script_snippet, "GIT_DIR", absolute_path(get_git_dir()));
add_var(&script_snippet, "state_dir", opts->state_dir);
@@ -523,131 +834,6 @@
return status ? -1 : 0;
}
-#define GIT_REFLOG_ACTION_ENVIRONMENT "GIT_REFLOG_ACTION"
-
-#define RESET_HEAD_DETACH (1<<0)
-#define RESET_HEAD_HARD (1<<1)
-#define RESET_HEAD_RUN_POST_CHECKOUT_HOOK (1<<2)
-
-static int reset_head(struct object_id *oid, const char *action,
- const char *switch_to_branch, unsigned flags,
- const char *reflog_orig_head, const char *reflog_head)
-{
- unsigned detach_head = flags & RESET_HEAD_DETACH;
- unsigned reset_hard = flags & RESET_HEAD_HARD;
- unsigned run_hook = flags & RESET_HEAD_RUN_POST_CHECKOUT_HOOK;
- struct object_id head_oid;
- struct tree_desc desc[2] = { { NULL }, { NULL } };
- struct lock_file lock = LOCK_INIT;
- struct unpack_trees_options unpack_tree_opts;
- struct tree *tree;
- const char *reflog_action;
- struct strbuf msg = STRBUF_INIT;
- size_t prefix_len;
- struct object_id *orig = NULL, oid_orig,
- *old_orig = NULL, oid_old_orig;
- int ret = 0, nr = 0;
-
- if (switch_to_branch && !starts_with(switch_to_branch, "refs/"))
- BUG("Not a fully qualified branch: '%s'", switch_to_branch);
-
- if (hold_locked_index(&lock, LOCK_REPORT_ON_ERROR) < 0) {
- ret = -1;
- goto leave_reset_head;
- }
-
- if ((!oid || !reset_hard) && get_oid("HEAD", &head_oid)) {
- ret = error(_("could not determine HEAD revision"));
- goto leave_reset_head;
- }
-
- if (!oid)
- oid = &head_oid;
-
- memset(&unpack_tree_opts, 0, sizeof(unpack_tree_opts));
- setup_unpack_trees_porcelain(&unpack_tree_opts, action);
- unpack_tree_opts.head_idx = 1;
- unpack_tree_opts.src_index = the_repository->index;
- unpack_tree_opts.dst_index = the_repository->index;
- unpack_tree_opts.fn = reset_hard ? oneway_merge : twoway_merge;
- unpack_tree_opts.update = 1;
- unpack_tree_opts.merge = 1;
- if (!detach_head)
- unpack_tree_opts.reset = 1;
-
- if (read_index_unmerged(the_repository->index) < 0) {
- ret = error(_("could not read index"));
- goto leave_reset_head;
- }
-
- if (!reset_hard && !fill_tree_descriptor(&desc[nr++], &head_oid)) {
- ret = error(_("failed to find tree of %s"),
- oid_to_hex(&head_oid));
- goto leave_reset_head;
- }
-
- if (!fill_tree_descriptor(&desc[nr++], oid)) {
- ret = error(_("failed to find tree of %s"), oid_to_hex(oid));
- goto leave_reset_head;
- }
-
- if (unpack_trees(nr, desc, &unpack_tree_opts)) {
- ret = -1;
- goto leave_reset_head;
- }
-
- tree = parse_tree_indirect(oid);
- prime_cache_tree(the_repository, the_repository->index, tree);
-
- if (write_locked_index(the_repository->index, &lock, COMMIT_LOCK) < 0) {
- ret = error(_("could not write index"));
- goto leave_reset_head;
- }
-
- reflog_action = getenv(GIT_REFLOG_ACTION_ENVIRONMENT);
- strbuf_addf(&msg, "%s: ", reflog_action ? reflog_action : "rebase");
- prefix_len = msg.len;
-
- if (!get_oid("ORIG_HEAD", &oid_old_orig))
- old_orig = &oid_old_orig;
- if (!get_oid("HEAD", &oid_orig)) {
- orig = &oid_orig;
- if (!reflog_orig_head) {
- strbuf_addstr(&msg, "updating ORIG_HEAD");
- reflog_orig_head = msg.buf;
- }
- update_ref(reflog_orig_head, "ORIG_HEAD", orig, old_orig, 0,
- UPDATE_REFS_MSG_ON_ERR);
- } else if (old_orig)
- delete_ref(NULL, "ORIG_HEAD", old_orig, 0);
- if (!reflog_head) {
- strbuf_setlen(&msg, prefix_len);
- strbuf_addstr(&msg, "updating HEAD");
- reflog_head = msg.buf;
- }
- if (!switch_to_branch)
- ret = update_ref(reflog_head, "HEAD", oid, orig,
- detach_head ? REF_NO_DEREF : 0,
- UPDATE_REFS_MSG_ON_ERR);
- else {
- ret = create_symref("HEAD", switch_to_branch, msg.buf);
- if (!ret)
- ret = update_ref(reflog_head, "HEAD", oid, NULL, 0,
- UPDATE_REFS_MSG_ON_ERR);
- }
- if (run_hook)
- run_hook_le(NULL, "post-checkout",
- oid_to_hex(orig ? orig : &null_oid),
- oid_to_hex(oid), "1", NULL);
-
-leave_reset_head:
- strbuf_release(&msg);
- rollback_lock_file(&lock);
- while (nr)
- free((void *)desc[--nr].buffer);
- return ret;
-}
-
static int rebase_config(const char *var, const char *value, void *data)
{
struct rebase_options *opts = data;
