#include "cache.h"
#include "config.h"
#include "lockfile.h"
-#include "sequencer.h"
#include "dir.h"
#include "object.h"
#include "commit.h"
+#include "sequencer.h"
#include "tag.h"
#include "run-command.h"
#include "exec_cmd.h"
#include "trailer.h"
#include "log-tree.h"
#include "wt-status.h"
+#include "hashmap.h"
+#include "notes-utils.h"
+#include "sigchain.h"
#define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION"
const char sign_off_header[] = "Signed-off-by: ";
static const char cherry_picked_prefix[] = "(cherry picked from commit ";
+GIT_PATH_FUNC(git_path_commit_editmsg, "COMMIT_EDITMSG")
+
GIT_PATH_FUNC(git_path_seq_dir, "sequencer")
static GIT_PATH_FUNC(git_path_todo_file, "sequencer/todo")
static GIT_PATH_FUNC(rebase_path_strategy_opts, "rebase-merge/strategy_opts")
static GIT_PATH_FUNC(rebase_path_allow_rerere_autoupdate, "rebase-merge/allow_rerere_autoupdate")
+static int git_sequencer_config(const char *k, const char *v, void *cb)
+{
+ struct replay_opts *opts = cb;
+ int status;
+
+ if (!strcmp(k, "commit.cleanup")) {
+ const char *s;
+
+ status = git_config_string(&s, k, v);
+ if (status)
+ return status;
+
+ if (!strcmp(s, "verbatim"))
+ opts->default_msg_cleanup = COMMIT_MSG_CLEANUP_NONE;
+ else if (!strcmp(s, "whitespace"))
+ opts->default_msg_cleanup = COMMIT_MSG_CLEANUP_SPACE;
+ else if (!strcmp(s, "strip"))
+ opts->default_msg_cleanup = COMMIT_MSG_CLEANUP_ALL;
+ else if (!strcmp(s, "scissors"))
+ opts->default_msg_cleanup = COMMIT_MSG_CLEANUP_SPACE;
+ else
+ warning(_("invalid commit message cleanup mode '%s'"),
+ s);
+
+ return status;
+ }
+
+ if (!strcmp(k, "commit.gpgsign")) {
+ opts->gpg_sign = git_config_bool(k, v) ? xstrdup("") : NULL;
+ return 0;
+ }
+
+ status = git_gpg_config(k, v, NULL);
+ if (status)
+ return status;
+
+ return git_diff_basic_config(k, v, NULL);
+}
+
+void sequencer_init_config(struct replay_opts *opts)
+{
+ opts->default_msg_cleanup = COMMIT_MSG_CLEANUP_NONE;
+ git_config(git_sequencer_config, opts);
+}
+
static inline int is_rebase_i(const struct replay_opts *opts)
{
return opts->action == REPLAY_INTERACTIVE_REBASE;
free(opts->xopts[i]);
free(opts->xopts);
- strbuf_addf(&dir, "%s", get_dir(opts));
+ strbuf_addstr(&dir, get_dir(opts));
remove_dir_recursively(&dir, 0);
strbuf_release(&dir);
static int write_message(const void *buf, size_t len, const char *filename,
int append_eol)
{
- static struct lock_file msg_file;
+ struct lock_file msg_file = LOCK_INIT;
int msg_fd = hold_lock_file_for_update(&msg_file, filename, 0);
if (msg_fd < 0)
rollback_lock_file(&msg_file);
return error_errno(_("could not write eol to '%s'"), filename);
}
- if (commit_lock_file(&msg_file) < 0) {
- rollback_lock_file(&msg_file);
- return error(_("failed to finalize '%s'."), filename);
- }
+ if (commit_lock_file(&msg_file) < 0)
+ return error(_("failed to finalize '%s'"), filename);
return 0;
}
static struct tree *empty_tree(void)
{
- return lookup_tree(&empty_tree_oid);
+ return lookup_tree(the_hash_algo->empty_tree);
}
static int error_dirty_index(struct replay_opts *opts)
transaction = ref_transaction_begin(&err);
if (!transaction ||
ref_transaction_update(transaction, "HEAD",
- to->hash, unborn ? null_sha1 : from->hash,
+ to, unborn ? &null_oid : from,
0, sb.buf, &err) ||
ref_transaction_commit(transaction, &err)) {
ref_transaction_free(transaction);
struct tree *result, *next_tree, *base_tree, *head_tree;
int clean;
char **xopt;
- static struct lock_file index_lock;
+ struct lock_file index_lock = LOCK_INIT;
- hold_locked_index(&index_lock, LOCK_DIE_ON_ERROR);
+ if (hold_locked_index(&index_lock, LOCK_REPORT_ON_ERROR) < 0)
+ return -1;
read_cache();
o.branch2 = next ? next_label : "(empty tree)";
if (is_rebase_i(opts))
o.buffer_output = 2;
+ o.show_rename_progress = 1;
head_tree = parse_tree_indirect(head);
next_tree = next ? next->tree : empty_tree();
if (is_rebase_i(opts) && clean <= 0)
fputs(o.obuf.buf, stdout);
strbuf_release(&o.obuf);
- if (clean < 0)
+ diff_warn_rename_limit("merge.renamelimit", o.needed_rename_limit, 0);
+ if (clean < 0) {
+ rollback_lock_file(&index_lock);
return clean;
+ }
- if (active_cache_changed &&
- write_locked_index(&the_index, &index_lock, COMMIT_LOCK))
+ if (write_locked_index(&the_index, &index_lock,
+ COMMIT_LOCK | SKIP_IF_UNCHANGED))
/*
* TRANSLATORS: %s will be "revert", "cherry-pick" or
* "rebase -i".
*/
return error(_("%s: Unable to write new index file"),
_(action_name(opts)));
- rollback_lock_file(&index_lock);
-
- if (opts->signoff)
- append_signoff(msgbuf, 0, 0);
if (!clean)
append_conflicts_hint(msgbuf);
struct object_id head_oid;
struct commit *head_commit;
- if (!resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, head_oid.hash, NULL))
- return error(_("could not resolve HEAD commit\n"));
+ if (!resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, &head_oid, NULL))
+ return error(_("could not resolve HEAD commit"));
head_commit = lookup_commit(&head_oid);
if (!cache_tree_fully_valid(active_cache_tree))
if (cache_tree_update(&the_index, 0))
- return error(_("unable to update cache tree\n"));
+ return error(_("unable to update cache tree"));
return !oidcmp(&active_cache_tree->oid,
&head_commit->tree->object.oid);
return 0;
}
+static char *get_author(const char *message)
+{
+ size_t len;
+ const char *a;
+
+ a = find_commit_header(message, "author", &len);
+ if (a)
+ return xmemdupz(a, len);
+
+ return NULL;
+}
+
static const char staged_changes_advice[] =
N_("you have staged changes in your working tree\n"
"If these changes are meant to be squashed into the previous commit, run:\n"
argv_array_push(&cmd.args, "--amend");
if (opts->gpg_sign)
argv_array_pushf(&cmd.args, "-S%s", opts->gpg_sign);
- if (opts->signoff)
- argv_array_push(&cmd.args, "-s");
if (defmsg)
argv_array_pushl(&cmd.args, "-F", defmsg, NULL);
if ((flags & CLEANUP_MSG))
return run_command(&cmd);
}
+static int rest_is_empty(const struct strbuf *sb, int start)
+{
+ int i, eol;
+ const char *nl;
+
+ /* Check if the rest is just whitespace and Signed-off-by's. */
+ for (i = start; i < sb->len; i++) {
+ nl = memchr(sb->buf + i, '\n', sb->len - i);
+ if (nl)
+ eol = nl - sb->buf;
+ else
+ eol = sb->len;
+
+ if (strlen(sign_off_header) <= eol - i &&
+ starts_with(sb->buf + i, sign_off_header)) {
+ i = eol;
+ continue;
+ }
+ while (i < eol)
+ if (!isspace(sb->buf[i++]))
+ return 0;
+ }
+
+ return 1;
+}
+
+/*
+ * Find out if the message in the strbuf contains only whitespace and
+ * Signed-off-by lines.
+ */
+int message_is_empty(const struct strbuf *sb,
+ enum commit_msg_cleanup_mode cleanup_mode)
+{
+ if (cleanup_mode == COMMIT_MSG_CLEANUP_NONE && sb->len)
+ return 0;
+ return rest_is_empty(sb, 0);
+}
+
+/*
+ * See if the user edited the message in the editor or left what
+ * was in the template intact
+ */
+int template_untouched(const struct strbuf *sb, const char *template_file,
+ enum commit_msg_cleanup_mode cleanup_mode)
+{
+ struct strbuf tmpl = STRBUF_INIT;
+ const char *start;
+
+ if (cleanup_mode == COMMIT_MSG_CLEANUP_NONE && sb->len)
+ return 0;
+
+ if (!template_file || strbuf_read_file(&tmpl, template_file, 0) <= 0)
+ return 0;
+
+ strbuf_stripspace(&tmpl, cleanup_mode == COMMIT_MSG_CLEANUP_ALL);
+ if (!skip_prefix(sb->buf, tmpl.buf, &start))
+ start = sb->buf;
+ strbuf_release(&tmpl);
+ return rest_is_empty(sb, start - sb->buf);
+}
+
+int update_head_with_reflog(const struct commit *old_head,
+ const struct object_id *new_head,
+ const char *action, const struct strbuf *msg,
+ struct strbuf *err)
+{
+ struct ref_transaction *transaction;
+ struct strbuf sb = STRBUF_INIT;
+ const char *nl;
+ int ret = 0;
+
+ if (action) {
+ strbuf_addstr(&sb, action);
+ strbuf_addstr(&sb, ": ");
+ }
+
+ nl = strchr(msg->buf, '\n');
+ if (nl) {
+ strbuf_add(&sb, msg->buf, nl + 1 - msg->buf);
+ } else {
+ strbuf_addbuf(&sb, msg);
+ strbuf_addch(&sb, '\n');
+ }
+
+ transaction = ref_transaction_begin(err);
+ if (!transaction ||
+ ref_transaction_update(transaction, "HEAD", new_head,
+ old_head ? &old_head->object.oid : &null_oid,
+ 0, sb.buf, err) ||
+ ref_transaction_commit(transaction, err)) {
+ ret = -1;
+ }
+ ref_transaction_free(transaction);
+ strbuf_release(&sb);
+
+ return ret;
+}
+
+static int run_rewrite_hook(const struct object_id *oldoid,
+ const struct object_id *newoid)
+{
+ struct child_process proc = CHILD_PROCESS_INIT;
+ const char *argv[3];
+ int code;
+ struct strbuf sb = STRBUF_INIT;
+
+ argv[0] = find_hook("post-rewrite");
+ if (!argv[0])
+ return 0;
+
+ argv[1] = "amend";
+ argv[2] = NULL;
+
+ proc.argv = argv;
+ proc.in = -1;
+ proc.stdout_to_stderr = 1;
+
+ code = start_command(&proc);
+ if (code)
+ return code;
+ strbuf_addf(&sb, "%s %s\n", oid_to_hex(oldoid), oid_to_hex(newoid));
+ sigchain_push(SIGPIPE, SIG_IGN);
+ write_in_full(proc.in, sb.buf, sb.len);
+ close(proc.in);
+ strbuf_release(&sb);
+ sigchain_pop(SIGPIPE);
+ return finish_command(&proc);
+}
+
+void commit_post_rewrite(const struct commit *old_head,
+ const struct object_id *new_head)
+{
+ struct notes_rewrite_cfg *cfg;
+
+ cfg = init_copy_notes_for_rewrite("amend");
+ if (cfg) {
+ /* we are amending, so old_head is not NULL */
+ copy_note_for_rewrite(cfg, &old_head->object.oid, new_head);
+ finish_copy_notes_for_rewrite(cfg, "Notes added by 'git commit --amend'");
+ }
+ run_rewrite_hook(&old_head->object.oid, new_head);
+}
+
+static int run_prepare_commit_msg_hook(struct strbuf *msg, const char *commit)
+{
+ struct argv_array hook_env = ARGV_ARRAY_INIT;
+ int ret;
+ const char *name;
+
+ name = git_path_commit_editmsg();
+ if (write_message(msg->buf, msg->len, name, 0))
+ return -1;
+
+ argv_array_pushf(&hook_env, "GIT_INDEX_FILE=%s", get_index_file());
+ argv_array_push(&hook_env, "GIT_EDITOR=:");
+ if (commit)
+ ret = run_hook_le(hook_env.argv, "prepare-commit-msg", name,
+ "commit", commit, NULL);
+ else
+ ret = run_hook_le(hook_env.argv, "prepare-commit-msg", name,
+ "message", NULL);
+ if (ret)
+ ret = error(_("'prepare-commit-msg' hook failed"));
+ argv_array_clear(&hook_env);
+
+ return ret;
+}
+
+static const char implicit_ident_advice_noconfig[] =
+N_("Your name and email address were configured automatically based\n"
+"on your username and hostname. Please check that they are accurate.\n"
+"You can suppress this message by setting them explicitly. Run the\n"
+"following command and follow the instructions in your editor to edit\n"
+"your configuration file:\n"
+"\n"
+" git config --global --edit\n"
+"\n"
+"After doing this, you may fix the identity used for this commit with:\n"
+"\n"
+" git commit --amend --reset-author\n");
+
+static const char implicit_ident_advice_config[] =
+N_("Your name and email address were configured automatically based\n"
+"on your username and hostname. Please check that they are accurate.\n"
+"You can suppress this message by setting them explicitly:\n"
+"\n"
+" git config --global user.name \"Your Name\"\n"
+" git config --global user.email you@example.com\n"
+"\n"
+"After doing this, you may fix the identity used for this commit with:\n"
+"\n"
+" git commit --amend --reset-author\n");
+
+static const char *implicit_ident_advice(void)
+{
+ char *user_config = expand_user_path("~/.gitconfig", 0);
+ char *xdg_config = xdg_config_home("config");
+ int config_exists = file_exists(user_config) || file_exists(xdg_config);
+
+ free(user_config);
+ free(xdg_config);
+
+ if (config_exists)
+ return _(implicit_ident_advice_config);
+ else
+ return _(implicit_ident_advice_noconfig);
+
+}
+
+void print_commit_summary(const char *prefix, const struct object_id *oid,
+ unsigned int flags)
+{
+ struct rev_info rev;
+ struct commit *commit;
+ struct strbuf format = STRBUF_INIT;
+ const char *head;
+ struct pretty_print_context pctx = {0};
+ struct strbuf author_ident = STRBUF_INIT;
+ struct strbuf committer_ident = STRBUF_INIT;
+
+ commit = lookup_commit(oid);
+ if (!commit)
+ die(_("couldn't look up newly created commit"));
+ if (parse_commit(commit))
+ die(_("could not parse newly created commit"));
+
+ strbuf_addstr(&format, "format:%h] %s");
+
+ format_commit_message(commit, "%an <%ae>", &author_ident, &pctx);
+ format_commit_message(commit, "%cn <%ce>", &committer_ident, &pctx);
+ if (strbuf_cmp(&author_ident, &committer_ident)) {
+ strbuf_addstr(&format, "\n Author: ");
+ strbuf_addbuf_percentquote(&format, &author_ident);
+ }
+ if (flags & SUMMARY_SHOW_AUTHOR_DATE) {
+ struct strbuf date = STRBUF_INIT;
+
+ format_commit_message(commit, "%ad", &date, &pctx);
+ strbuf_addstr(&format, "\n Date: ");
+ strbuf_addbuf_percentquote(&format, &date);
+ strbuf_release(&date);
+ }
+ if (!committer_ident_sufficiently_given()) {
+ strbuf_addstr(&format, "\n Committer: ");
+ strbuf_addbuf_percentquote(&format, &committer_ident);
+ if (advice_implicit_identity) {
+ strbuf_addch(&format, '\n');
+ strbuf_addstr(&format, implicit_ident_advice());
+ }
+ }
+ strbuf_release(&author_ident);
+ strbuf_release(&committer_ident);
+
+ init_revisions(&rev, prefix);
+ setup_revisions(0, NULL, &rev, NULL);
+
+ rev.diff = 1;
+ rev.diffopt.output_format =
+ DIFF_FORMAT_SHORTSTAT | DIFF_FORMAT_SUMMARY;
+
+ rev.verbose_header = 1;
+ rev.show_root_diff = 1;
+ get_commit_format(format.buf, &rev);
+ rev.always_show_header = 0;
+ rev.diffopt.detect_rename = DIFF_DETECT_RENAME;
+ rev.diffopt.break_opt = 0;
+ diff_setup_done(&rev.diffopt);
+
+ head = resolve_ref_unsafe("HEAD", 0, NULL, NULL);
+ if (!head)
+ die_errno(_("unable to resolve HEAD after creating commit"));
+ if (!strcmp(head, "HEAD"))
+ head = _("detached HEAD");
+ else
+ skip_prefix(head, "refs/heads/", &head);
+ printf("[%s%s ", head, (flags & SUMMARY_INITIAL_COMMIT) ?
+ _(" (root-commit)") : "");
+
+ if (!log_tree_commit(&rev, commit)) {
+ rev.always_show_header = 1;
+ rev.use_terminator = 1;
+ log_tree_commit(&rev, commit);
+ }
+
+ strbuf_release(&format);
+}
+
+static int parse_head(struct commit **head)
+{
+ struct commit *current_head;
+ struct object_id oid;
+
+ if (get_oid("HEAD", &oid)) {
+ current_head = NULL;
+ } else {
+ current_head = lookup_commit_reference(&oid);
+ if (!current_head)
+ return error(_("could not parse HEAD"));
+ if (oidcmp(&oid, ¤t_head->object.oid)) {
+ warning(_("HEAD %s is not a commit!"),
+ oid_to_hex(&oid));
+ }
+ if (parse_commit(current_head))
+ return error(_("could not parse HEAD commit"));
+ }
+ *head = current_head;
+
+ return 0;
+}
+
+/*
+ * Try to commit without forking 'git commit'. In some cases we need
+ * to run 'git commit' to display an error message
+ *
+ * Returns:
+ * -1 - error unable to commit
+ * 0 - success
+ * 1 - run 'git commit'
+ */
+static int try_to_commit(struct strbuf *msg, const char *author,
+ struct replay_opts *opts, unsigned int flags,
+ struct object_id *oid)
+{
+ struct object_id tree;
+ struct commit *current_head;
+ struct commit_list *parents = NULL;
+ struct commit_extra_header *extra = NULL;
+ struct strbuf err = STRBUF_INIT;
+ struct strbuf commit_msg = STRBUF_INIT;
+ char *amend_author = NULL;
+ const char *hook_commit = NULL;
+ enum commit_msg_cleanup_mode cleanup;
+ int res = 0;
+
+ if (parse_head(¤t_head))
+ return -1;
+
+ if (flags & AMEND_MSG) {
+ const char *exclude_gpgsig[] = { "gpgsig", NULL };
+ const char *out_enc = get_commit_output_encoding();
+ const char *message = logmsg_reencode(current_head, NULL,
+ out_enc);
+
+ if (!msg) {
+ const char *orig_message = NULL;
+
+ find_commit_subject(message, &orig_message);
+ msg = &commit_msg;
+ strbuf_addstr(msg, orig_message);
+ hook_commit = "HEAD";
+ }
+ author = amend_author = get_author(message);
+ unuse_commit_buffer(current_head, message);
+ if (!author) {
+ res = error(_("unable to parse commit author"));
+ goto out;
+ }
+ parents = copy_commit_list(current_head->parents);
+ extra = read_commit_extra_headers(current_head, exclude_gpgsig);
+ } else if (current_head) {
+ commit_list_insert(current_head, &parents);
+ }
+
+ if (write_cache_as_tree(tree.hash, 0, NULL)) {
+ res = error(_("git write-tree failed to write a tree"));
+ goto out;
+ }
+
+ if (!(flags & ALLOW_EMPTY) && !oidcmp(current_head ?
+ ¤t_head->tree->object.oid :
+ &empty_tree_oid, &tree)) {
+ res = 1; /* run 'git commit' to display error message */
+ goto out;
+ }
+
+ if (find_hook("prepare-commit-msg")) {
+ res = run_prepare_commit_msg_hook(msg, hook_commit);
+ if (res)
+ goto out;
+ if (strbuf_read_file(&commit_msg, git_path_commit_editmsg(),
+ 2048) < 0) {
+ res = error_errno(_("unable to read commit message "
+ "from '%s'"),
+ git_path_commit_editmsg());
+ goto out;
+ }
+ msg = &commit_msg;
+ }
+
+ cleanup = (flags & CLEANUP_MSG) ? COMMIT_MSG_CLEANUP_ALL :
+ opts->default_msg_cleanup;
+
+ if (cleanup != COMMIT_MSG_CLEANUP_NONE)
+ strbuf_stripspace(msg, cleanup == COMMIT_MSG_CLEANUP_ALL);
+ if (!opts->allow_empty_message && message_is_empty(msg, cleanup)) {
+ res = 1; /* run 'git commit' to display error message */
+ goto out;
+ }
+
+ if (commit_tree_extended(msg->buf, msg->len, &tree, parents,
+ oid, author, opts->gpg_sign, extra)) {
+ res = error(_("failed to write commit object"));
+ goto out;
+ }
+
+ if (update_head_with_reflog(current_head, oid,
+ getenv("GIT_REFLOG_ACTION"), msg, &err)) {
+ res = error("%s", err.buf);
+ goto out;
+ }
+
+ if (flags & AMEND_MSG)
+ commit_post_rewrite(current_head, oid);
+
+out:
+ free_commit_extra_headers(extra);
+ strbuf_release(&err);
+ strbuf_release(&commit_msg);
+ free(amend_author);
+
+ return res;
+}
+
+static int do_commit(const char *msg_file, const char *author,
+ struct replay_opts *opts, unsigned int flags)
+{
+ int res = 1;
+
+ if (!(flags & EDIT_MSG) && !(flags & VERIFY_MSG)) {
+ struct object_id oid;
+ struct strbuf sb = STRBUF_INIT;
+
+ if (msg_file && strbuf_read_file(&sb, msg_file, 2048) < 0)
+ return error_errno(_("unable to read commit message "
+ "from '%s'"),
+ msg_file);
+
+ res = try_to_commit(msg_file ? &sb : NULL, author, opts, flags,
+ &oid);
+ strbuf_release(&sb);
+ if (!res) {
+ unlink(git_path_cherry_pick_head());
+ unlink(git_path_merge_msg());
+ if (!is_rebase_i(opts))
+ print_commit_summary(NULL, &oid,
+ SUMMARY_SHOW_AUTHOR_DATE);
+ return res;
+ }
+ }
+ if (res == 1)
+ return run_git_commit(msg_file, opts, flags);
+
+ return res;
+}
+
static int is_original_commit_empty(struct commit *commit)
{
- const unsigned char *ptree_sha1;
+ const struct object_id *ptree_oid;
if (parse_commit(commit))
- return error(_("could not parse commit %s\n"),
+ return error(_("could not parse commit %s"),
oid_to_hex(&commit->object.oid));
if (commit->parents) {
struct commit *parent = commit->parents->item;
if (parse_commit(parent))
- return error(_("could not parse parent commit %s\n"),
+ return error(_("could not parse parent commit %s"),
oid_to_hex(&parent->object.oid));
- ptree_sha1 = parent->tree->object.oid.hash;
+ ptree_oid = &parent->tree->object.oid;
} else {
- ptree_sha1 = EMPTY_TREE_SHA1_BIN; /* commit is root */
+ ptree_oid = the_hash_algo->empty_tree; /* commit is root */
}
- return !hashcmp(ptree_sha1, commit->tree->object.oid.hash);
+ return !oidcmp(ptree_oid, &commit->tree->object.oid);
}
/*
die("Unknown command: %d", command);
}
+static char command_to_char(const enum todo_command command)
+{
+ if (command < TODO_COMMENT && todo_command_info[command].c)
+ return todo_command_info[command].c;
+ return comment_line_char;
+}
+
static int is_noop(const enum todo_command command)
{
return TODO_NOOP <= command;
static void flush_rewritten_pending(void) {
struct strbuf buf = STRBUF_INIT;
- unsigned char newsha1[20];
+ struct object_id newoid;
FILE *out;
- if (strbuf_read_file(&buf, rebase_path_rewritten_pending(), 82) > 0 &&
- !get_sha1("HEAD", newsha1) &&
+ if (strbuf_read_file(&buf, rebase_path_rewritten_pending(), (GIT_MAX_HEXSZ + 1) * 2) > 0 &&
+ !get_oid("HEAD", &newoid) &&
(out = fopen_or_warn(rebase_path_rewritten_list(), "a"))) {
char *bol = buf.buf, *eol;
while (*bol) {
eol = strchrnul(bol, '\n');
fprintf(out, "%.*s %s\n", (int)(eol - bol),
- bol, sha1_to_hex(newsha1));
+ bol, oid_to_hex(&newoid));
if (!*eol)
break;
bol = eol + 1;
struct object_id head;
struct commit *base, *next, *parent;
const char *base_label, *next_label;
+ char *author = NULL;
struct commit_message msg = { NULL, NULL, NULL, NULL };
struct strbuf msgbuf = STRBUF_INIT;
int res, unborn = 0, allow;
} else {
unborn = get_oid("HEAD", &head);
if (unborn)
- oidcpy(&head, &empty_tree_oid);
- if (index_differs_from(unborn ? EMPTY_TREE_SHA1_HEX : "HEAD", 0, 0))
+ oidcpy(&head, the_hash_algo->empty_tree);
+ if (index_differs_from(unborn ? EMPTY_TREE_SHA1_HEX : "HEAD",
+ NULL, 0))
return error_dirty_index(opts);
}
discard_cache();
opts);
if (res || command != TODO_REWORD)
goto leave;
- flags |= EDIT_MSG | AMEND_MSG;
- if (command == TODO_REWORD)
- flags |= VERIFY_MSG;
+ flags |= EDIT_MSG | AMEND_MSG | VERIFY_MSG;
msg_file = NULL;
goto fast_forward_edit;
}
strbuf_addstr(&msgbuf, oid_to_hex(&commit->object.oid));
strbuf_addstr(&msgbuf, ")\n");
}
+ if (!is_fixup(command))
+ author = get_author(msg.message);
}
if (command == TODO_REWORD)
}
}
+ if (opts->signoff)
+ append_signoff(&msgbuf, 0, 0);
+
if (is_rebase_i(opts) && write_author_script(msg.message) < 0)
res = -1;
else if (!opts->strategy || !strcmp(opts->strategy, "recursive") || command == TODO_REVERT) {
* write it at all.
*/
if (command == TODO_PICK && !opts->no_commit && (res == 0 || res == 1) &&
- update_ref(NULL, "CHERRY_PICK_HEAD", commit->object.oid.hash, NULL,
- REF_NODEREF, UPDATE_REFS_MSG_ON_ERR))
+ update_ref(NULL, "CHERRY_PICK_HEAD", &commit->object.oid, NULL,
+ REF_NO_DEREF, UPDATE_REFS_MSG_ON_ERR))
res = -1;
if (command == TODO_REVERT && ((opts->no_commit && res == 0) || res == 1) &&
- update_ref(NULL, "REVERT_HEAD", commit->object.oid.hash, NULL,
- REF_NODEREF, UPDATE_REFS_MSG_ON_ERR))
+ update_ref(NULL, "REVERT_HEAD", &commit->object.oid, NULL,
+ REF_NO_DEREF, UPDATE_REFS_MSG_ON_ERR))
res = -1;
if (res) {
goto leave;
} else if (allow)
flags |= ALLOW_EMPTY;
- if (!opts->no_commit)
+ if (!opts->no_commit) {
fast_forward_edit:
- res = run_git_commit(msg_file, opts, flags);
+ if (author || command == TODO_REVERT || (flags & AMEND_MSG))
+ res = do_commit(msg_file, author, opts, flags);
+ else
+ res = error(_("unable to parse commit author"));
+ }
if (!res && final_fixup) {
unlink(rebase_path_fixup_msg());
leave:
free_message(commit, &msg);
+ free(author);
update_abort_safety_file();
return res;
static int read_and_refresh_cache(struct replay_opts *opts)
{
- static struct lock_file index_lock;
+ struct lock_file index_lock = LOCK_INIT;
int index_fd = hold_locked_index(&index_lock, 0);
if (read_index_preload(&the_index, NULL) < 0) {
rollback_lock_file(&index_lock);
_(action_name(opts)));
}
refresh_index(&the_index, REFRESH_QUIET|REFRESH_UNMERGED, NULL, NULL, NULL);
- if (the_index.cache_changed && index_fd >= 0) {
- if (write_locked_index(&the_index, &index_lock, COMMIT_LOCK)) {
- rollback_lock_file(&index_lock);
+ if (index_fd >= 0) {
+ if (write_locked_index(&the_index, &index_lock,
+ COMMIT_LOCK | SKIP_IF_UNCHANGED)) {
return error(_("git %s: failed to refresh the index"),
_(action_name(opts)));
}
}
- rollback_lock_file(&index_lock);
return 0;
}
if (i >= TODO_COMMENT)
return -1;
+ /* Eat up extra spaces/ tabs before object name */
+ padding = strspn(bol, " \t");
+ bol += padding;
+
if (item->command == TODO_NOOP) {
+ if (bol != eol)
+ return error(_("%s does not accept arguments: '%s'"),
+ command_to_string(item->command), bol);
item->commit = NULL;
item->arg = bol;
item->arg_len = eol - bol;
return 0;
}
- /* Eat up extra spaces/ tabs before object name */
- padding = strspn(bol, " \t");
if (!padding)
- return -1;
- bol += padding;
+ return error(_("missing arguments for %s"),
+ command_to_string(item->command));
if (item->command == TODO_EXEC) {
+ item->commit = NULL;
item->arg = bol;
item->arg_len = (int)(eol - bol);
return 0;
return count;
}
+static ssize_t strbuf_read_file_or_whine(struct strbuf *sb, const char *path)
+{
+ int fd;
+ ssize_t len;
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0)
+ return error_errno(_("could not open '%s'"), path);
+ len = strbuf_read(sb, fd, 0);
+ close(fd);
+ if (len < 0)
+ return error(_("could not read '%s'."), path);
+ return len;
+}
+
static int read_populate_todo(struct todo_list *todo_list,
struct replay_opts *opts)
{
struct stat st;
const char *todo_file = get_todo_path(opts);
- int fd, res;
+ int res;
strbuf_reset(&todo_list->buf);
- fd = open(todo_file, O_RDONLY);
- if (fd < 0)
- return error_errno(_("could not open '%s'"), todo_file);
- if (strbuf_read(&todo_list->buf, fd, 0) < 0) {
- close(fd);
- return error(_("could not read '%s'."), todo_file);
- }
- close(fd);
+ if (strbuf_read_file_or_whine(&todo_list->buf, todo_file) < 0)
+ return -1;
res = stat(todo_file, &st);
if (res)
static int save_head(const char *head)
{
- static struct lock_file head_lock;
+ struct lock_file head_lock = LOCK_INIT;
struct strbuf buf = STRBUF_INIT;
int fd;
+ ssize_t written;
fd = hold_lock_file_for_update(&head_lock, git_path_head_file(), 0);
- if (fd < 0) {
- rollback_lock_file(&head_lock);
+ if (fd < 0)
return error_errno(_("could not lock HEAD"));
- }
strbuf_addf(&buf, "%s\n", head);
- if (write_in_full(fd, buf.buf, buf.len) < 0) {
+ written = write_in_full(fd, buf.buf, buf.len);
+ strbuf_release(&buf);
+ if (written < 0) {
rollback_lock_file(&head_lock);
return error_errno(_("could not write to '%s'"),
git_path_head_file());
}
- if (commit_lock_file(&head_lock) < 0) {
- rollback_lock_file(&head_lock);
- return error(_("failed to finalize '%s'."), git_path_head_file());
- }
+ if (commit_lock_file(&head_lock) < 0)
+ return error(_("failed to finalize '%s'"), git_path_head_file());
return 0;
}
return !oidcmp(&actual_head, &expected_head);
}
-static int reset_for_rollback(const unsigned char *sha1)
+static int reset_for_rollback(const struct object_id *oid)
{
const char *argv[4]; /* reset --merge <arg> + NULL */
argv[0] = "reset";
argv[1] = "--merge";
- argv[2] = sha1_to_hex(sha1);
+ argv[2] = oid_to_hex(oid);
argv[3] = NULL;
return run_command_v_opt(argv, RUN_GIT_CMD);
}
static int rollback_single_pick(void)
{
- unsigned char head_sha1[20];
+ struct object_id head_oid;
if (!file_exists(git_path_cherry_pick_head()) &&
!file_exists(git_path_revert_head()))
return error(_("no cherry-pick or revert in progress"));
- if (read_ref_full("HEAD", 0, head_sha1, NULL))
+ if (read_ref_full("HEAD", 0, &head_oid, NULL))
return error(_("cannot resolve HEAD"));
- if (is_null_sha1(head_sha1))
+ if (is_null_oid(&head_oid))
return error(_("cannot abort from a branch yet to be born"));
- return reset_for_rollback(head_sha1);
+ return reset_for_rollback(&head_oid);
}
int sequencer_rollback(struct replay_opts *opts)
{
FILE *f;
- unsigned char sha1[20];
+ struct object_id oid;
struct strbuf buf = STRBUF_INIT;
+ const char *p;
f = fopen(git_path_head_file(), "r");
if (!f && errno == ENOENT) {
goto fail;
}
fclose(f);
- if (get_sha1_hex(buf.buf, sha1) || buf.buf[40] != '\0') {
+ if (parse_oid_hex(buf.buf, &oid, &p) || *p != '\0') {
error(_("stored pre-cherry-pick HEAD file '%s' is corrupt"),
git_path_head_file());
goto fail;
}
- if (is_null_sha1(sha1)) {
+ if (is_null_oid(&oid)) {
error(_("cannot abort from a branch yet to be born"));
goto fail;
}
warning(_("You seem to have moved HEAD. "
"Not rewinding, check your HEAD!"));
} else
- if (reset_for_rollback(sha1))
+ if (reset_for_rollback(&oid))
goto fail;
strbuf_release(&buf);
return sequencer_remove_state(opts);
static int save_todo(struct todo_list *todo_list, struct replay_opts *opts)
{
- static struct lock_file todo_lock;
+ struct lock_file todo_lock = LOCK_INIT;
const char *todo_path = get_todo_path(opts);
int next = todo_list->current, offset, fd;
todo_list->buf.len - offset) < 0)
return error_errno(_("could not write to '%s'"), todo_path);
if (commit_lock_file(&todo_lock) < 0)
- return error(_("failed to finalize '%s'."), todo_path);
+ return error(_("failed to finalize '%s'"), todo_path);
if (is_rebase_i(opts)) {
const char *done_path = rebase_path_done();
p = short_commit_name(commit);
if (write_message(p, strlen(p), rebase_path_stopped_sha(), 1) < 0)
return -1;
+ if (update_ref("rebase", "REBASE_HEAD", &commit->object.oid,
+ NULL, REF_NO_DEREF, UPDATE_REFS_MSG_ON_ERR))
+ res |= error(_("could not update %s"), "REBASE_HEAD");
strbuf_addf(&buf, "%s/patch", get_dir(opts));
memset(&log_tree_opt, 0, sizeof(log_tree_opt));
static int intend_to_amend(void)
{
- unsigned char head[20];
+ struct object_id head;
char *p;
- if (get_sha1("HEAD", head))
+ if (get_oid("HEAD", &head))
return error(_("cannot read HEAD"));
- p = sha1_to_hex(head);
+ p = oid_to_hex(&head);
return write_message(p, strlen(p), rebase_path_amend(), 1);
}
static int do_exec(const char *command_line)
{
+ struct argv_array child_env = ARGV_ARRAY_INIT;
const char *child_argv[] = { NULL, NULL };
int dirty, status;
fprintf(stderr, "Executing: %s\n", command_line);
child_argv[0] = command_line;
- status = run_command_v_opt(child_argv, RUN_USING_SHELL);
+ argv_array_pushf(&child_env, "GIT_DIR=%s", absolute_path(get_git_dir()));
+ status = run_command_v_opt_cd_env(child_argv, RUN_USING_SHELL, NULL,
+ child_env.argv);
/* force re-reading of the cache */
if (discard_cache() < 0 || read_cache() < 0)
status = 1;
}
+ argv_array_clear(&child_env);
+
return status;
}
unlink(rebase_path_author_script());
unlink(rebase_path_stopped_sha());
unlink(rebase_path_amend());
+ delete_ref(NULL, "REBASE_HEAD", NULL, REF_NO_DEREF);
}
if (item->command <= TODO_SQUASH) {
if (is_rebase_i(opts))
if (read_oneliner(&head_ref, rebase_path_head_name(), 0) &&
starts_with(head_ref.buf, "refs/")) {
const char *msg;
- unsigned char head[20], orig[20];
+ struct object_id head, orig;
int res;
- if (get_sha1("HEAD", head)) {
+ if (get_oid("HEAD", &head)) {
res = error(_("cannot read HEAD"));
cleanup_head_ref:
strbuf_release(&head_ref);
return res;
}
if (!read_oneliner(&buf, rebase_path_orig_head(), 0) ||
- get_sha1_hex(buf.buf, orig)) {
+ get_oid_hex(buf.buf, &orig)) {
res = error(_("could not read orig-head"));
goto cleanup_head_ref;
}
}
msg = reflog_message(opts, "finish", "%s onto %s",
head_ref.buf, buf.buf);
- if (update_ref(msg, head_ref.buf, head, orig,
- REF_NODEREF, UPDATE_REFS_MSG_ON_ERR)) {
+ if (update_ref(msg, head_ref.buf, &head, &orig,
+ REF_NO_DEREF, UPDATE_REFS_MSG_ON_ERR)) {
res = error(_("could not update %s"),
head_ref.buf);
goto cleanup_head_ref;
log_tree_opt.disable_stdin = 1;
if (read_oneliner(&buf, rebase_path_orig_head(), 0) &&
- !get_sha1(buf.buf, orig.hash) &&
- !get_sha1("HEAD", head.hash)) {
+ !get_oid(buf.buf, &orig) &&
+ !get_oid("HEAD", &head)) {
diff_tree_oid(&orig, &head, "",
&log_tree_opt.diffopt);
log_tree_diff_flush(&log_tree_opt);
if (file_exists(rebase_path_amend())) {
struct strbuf rev = STRBUF_INIT;
- unsigned char head[20], to_amend[20];
+ struct object_id head, to_amend;
- if (get_sha1("HEAD", head))
+ if (get_oid("HEAD", &head))
return error(_("cannot amend non-existing commit"));
if (!read_oneliner(&rev, rebase_path_amend(), 0))
return error(_("invalid file: '%s'"), rebase_path_amend());
- if (get_sha1_hex(rev.buf, to_amend))
+ if (get_oid_hex(rev.buf, &to_amend))
return error(_("invalid contents: '%s'"),
rebase_path_amend());
- if (hashcmp(head, to_amend))
+ if (oidcmp(&head, &to_amend))
return error(_("\nYou have uncommitted changes in your "
"working tree. Please, commit them\n"
"first and then run 'git rebase "
if (res)
goto release_todo_list;
}
- if (index_differs_from("HEAD", 0, 0)) {
+ if (index_differs_from("HEAD", NULL, 0)) {
res = error_dirty_index(opts);
goto release_todo_list;
}
struct object_id oid;
if (read_oneliner(&buf, rebase_path_stopped_sha(), 1) &&
- !get_sha1_committish(buf.buf, oid.hash))
+ !get_oid_committish(buf.buf, &oid))
record_in_rewritten(&oid, peek_command(&todo_list, 0));
strbuf_release(&buf);
}
if (!lookup_commit_reference_gently(&oid, 1)) {
enum object_type type = sha1_object_info(oid.hash, NULL);
return error(_("%s: can't cherry-pick a %s"),
- name, typename(type));
+ name, type_name(type));
}
} else
return error(_("%s: bad revision"), name);
strbuf_release(&sob);
}
+
+int sequencer_make_script(FILE *out, int argc, const char **argv,
+ unsigned flags)
+{
+ char *format = NULL;
+ struct pretty_print_context pp = {0};
+ struct strbuf buf = STRBUF_INIT;
+ struct rev_info revs;
+ struct commit *commit;
+ int keep_empty = flags & TODO_LIST_KEEP_EMPTY;
+ const char *insn = flags & TODO_LIST_ABBREVIATE_CMDS ? "p" : "pick";
+
+ init_revisions(&revs, NULL);
+ revs.verbose_header = 1;
+ revs.max_parents = 1;
+ revs.cherry_pick = 1;
+ revs.limited = 1;
+ revs.reverse = 1;
+ revs.right_only = 1;
+ revs.sort_order = REV_SORT_IN_GRAPH_ORDER;
+ revs.topo_order = 1;
+
+ revs.pretty_given = 1;
+ git_config_get_string("rebase.instructionFormat", &format);
+ if (!format || !*format) {
+ free(format);
+ format = xstrdup("%s");
+ }
+ get_commit_format(format, &revs);
+ free(format);
+ pp.fmt = revs.commit_format;
+ pp.output_encoding = get_log_output_encoding();
+
+ if (setup_revisions(argc, argv, &revs, NULL) > 1)
+ return error(_("make_script: unhandled options"));
+
+ if (prepare_revision_walk(&revs) < 0)
+ return error(_("make_script: error preparing revisions"));
+
+ while ((commit = get_revision(&revs))) {
+ strbuf_reset(&buf);
+ if (!keep_empty && is_original_commit_empty(commit))
+ strbuf_addf(&buf, "%c ", comment_line_char);
+ strbuf_addf(&buf, "%s %s ", insn,
+ oid_to_hex(&commit->object.oid));
+ pretty_print_commit(&pp, commit, &buf);
+ strbuf_addch(&buf, '\n');
+ fputs(buf.buf, out);
+ }
+ strbuf_release(&buf);
+ return 0;
+}
+
+/*
+ * Add commands after pick and (series of) squash/fixup commands
+ * in the todo list.
+ */
+int sequencer_add_exec_commands(const char *commands)
+{
+ const char *todo_file = rebase_path_todo();
+ struct todo_list todo_list = TODO_LIST_INIT;
+ struct todo_item *item;
+ struct strbuf *buf = &todo_list.buf;
+ size_t offset = 0, commands_len = strlen(commands);
+ int i, first;
+
+ if (strbuf_read_file(&todo_list.buf, todo_file, 0) < 0)
+ return error(_("could not read '%s'."), todo_file);
+
+ if (parse_insn_buffer(todo_list.buf.buf, &todo_list)) {
+ todo_list_release(&todo_list);
+ return error(_("unusable todo list: '%s'"), todo_file);
+ }
+
+ first = 1;
+ /* insert <commands> before every pick except the first one */
+ for (item = todo_list.items, i = 0; i < todo_list.nr; i++, item++) {
+ if (item->command == TODO_PICK && !first) {
+ strbuf_insert(buf, item->offset_in_buf + offset,
+ commands, commands_len);
+ offset += commands_len;
+ }
+ first = 0;
+ }
+
+ /* append final <commands> */
+ strbuf_add(buf, commands, commands_len);
+
+ i = write_message(buf->buf, buf->len, todo_file, 0);
+ todo_list_release(&todo_list);
+ return i;
+}
+
+int transform_todos(unsigned flags)
+{
+ const char *todo_file = rebase_path_todo();
+ struct todo_list todo_list = TODO_LIST_INIT;
+ struct strbuf buf = STRBUF_INIT;
+ struct todo_item *item;
+ int i;
+
+ if (strbuf_read_file(&todo_list.buf, todo_file, 0) < 0)
+ return error(_("could not read '%s'."), todo_file);
+
+ if (parse_insn_buffer(todo_list.buf.buf, &todo_list)) {
+ todo_list_release(&todo_list);
+ return error(_("unusable todo list: '%s'"), todo_file);
+ }
+
+ for (item = todo_list.items, i = 0; i < todo_list.nr; i++, item++) {
+ /* if the item is not a command write it and continue */
+ if (item->command >= TODO_COMMENT) {
+ strbuf_addf(&buf, "%.*s\n", item->arg_len, item->arg);
+ continue;
+ }
+
+ /* add command to the buffer */
+ if (flags & TODO_LIST_ABBREVIATE_CMDS)
+ strbuf_addch(&buf, command_to_char(item->command));
+ else
+ strbuf_addstr(&buf, command_to_string(item->command));
+
+ /* add commit id */
+ if (item->commit) {
+ const char *oid = flags & TODO_LIST_SHORTEN_IDS ?
+ short_commit_name(item->commit) :
+ oid_to_hex(&item->commit->object.oid);
+
+ strbuf_addf(&buf, " %s", oid);
+ }
+ /* add all the rest */
+ if (!item->arg_len)
+ strbuf_addch(&buf, '\n');
+ else
+ strbuf_addf(&buf, " %.*s\n", item->arg_len, item->arg);
+ }
+
+ i = write_message(buf.buf, buf.len, todo_file, 0);
+ todo_list_release(&todo_list);
+ return i;
+}
+
+enum check_level {
+ CHECK_IGNORE = 0, CHECK_WARN, CHECK_ERROR
+};
+
+static enum check_level get_missing_commit_check_level(void)
+{
+ const char *value;
+
+ if (git_config_get_value("rebase.missingcommitscheck", &value) ||
+ !strcasecmp("ignore", value))
+ return CHECK_IGNORE;
+ if (!strcasecmp("warn", value))
+ return CHECK_WARN;
+ if (!strcasecmp("error", value))
+ return CHECK_ERROR;
+ warning(_("unrecognized setting %s for option "
+ "rebase.missingCommitsCheck. Ignoring."), value);
+ return CHECK_IGNORE;
+}
+
+/*
+ * Check if the user dropped some commits by mistake
+ * Behaviour determined by rebase.missingCommitsCheck.
+ * Check if there is an unrecognized command or a
+ * bad SHA-1 in a command.
+ */
+int check_todo_list(void)
+{
+ enum check_level check_level = get_missing_commit_check_level();
+ struct strbuf todo_file = STRBUF_INIT;
+ struct todo_list todo_list = TODO_LIST_INIT;
+ struct strbuf missing = STRBUF_INIT;
+ int advise_to_edit_todo = 0, res = 0, i;
+
+ strbuf_addstr(&todo_file, rebase_path_todo());
+ if (strbuf_read_file_or_whine(&todo_list.buf, todo_file.buf) < 0) {
+ res = -1;
+ goto leave_check;
+ }
+ advise_to_edit_todo = res =
+ parse_insn_buffer(todo_list.buf.buf, &todo_list);
+
+ if (res || check_level == CHECK_IGNORE)
+ goto leave_check;
+
+ /* Mark the commits in git-rebase-todo as seen */
+ for (i = 0; i < todo_list.nr; i++) {
+ struct commit *commit = todo_list.items[i].commit;
+ if (commit)
+ commit->util = (void *)1;
+ }
+
+ todo_list_release(&todo_list);
+ strbuf_addstr(&todo_file, ".backup");
+ if (strbuf_read_file_or_whine(&todo_list.buf, todo_file.buf) < 0) {
+ res = -1;
+ goto leave_check;
+ }
+ strbuf_release(&todo_file);
+ res = !!parse_insn_buffer(todo_list.buf.buf, &todo_list);
+
+ /* Find commits in git-rebase-todo.backup yet unseen */
+ for (i = todo_list.nr - 1; i >= 0; i--) {
+ struct todo_item *item = todo_list.items + i;
+ struct commit *commit = item->commit;
+ if (commit && !commit->util) {
+ strbuf_addf(&missing, " - %s %.*s\n",
+ short_commit_name(commit),
+ item->arg_len, item->arg);
+ commit->util = (void *)1;
+ }
+ }
+
+ /* Warn about missing commits */
+ if (!missing.len)
+ goto leave_check;
+
+ if (check_level == CHECK_ERROR)
+ advise_to_edit_todo = res = 1;
+
+ fprintf(stderr,
+ _("Warning: some commits may have been dropped accidentally.\n"
+ "Dropped commits (newer to older):\n"));
+
+ /* Make the list user-friendly and display */
+ fputs(missing.buf, stderr);
+ strbuf_release(&missing);
+
+ fprintf(stderr, _("To avoid this message, use \"drop\" to "
+ "explicitly remove a commit.\n\n"
+ "Use 'git config rebase.missingCommitsCheck' to change "
+ "the level of warnings.\n"
+ "The possible behaviours are: ignore, warn, error.\n\n"));
+
+leave_check:
+ strbuf_release(&todo_file);
+ todo_list_release(&todo_list);
+
+ if (advise_to_edit_todo)
+ fprintf(stderr,
+ _("You can fix this with 'git rebase --edit-todo' "
+ "and then run 'git rebase --continue'.\n"
+ "Or you can abort the rebase with 'git rebase"
+ " --abort'.\n"));
+
+ return res;
+}
+
+static int rewrite_file(const char *path, const char *buf, size_t len)
+{
+ int rc = 0;
+ int fd = open(path, O_WRONLY | O_TRUNC);
+ if (fd < 0)
+ return error_errno(_("could not open '%s' for writing"), path);
+ if (write_in_full(fd, buf, len) < 0)
+ rc = error_errno(_("could not write to '%s'"), path);
+ if (close(fd) && !rc)
+ rc = error_errno(_("could not close '%s'"), path);
+ return rc;
+}
+
+/* skip picking commits whose parents are unchanged */
+int skip_unnecessary_picks(void)
+{
+ const char *todo_file = rebase_path_todo();
+ struct strbuf buf = STRBUF_INIT;
+ struct todo_list todo_list = TODO_LIST_INIT;
+ struct object_id onto_oid, *oid = &onto_oid, *parent_oid;
+ int fd, i;
+
+ if (!read_oneliner(&buf, rebase_path_onto(), 0))
+ return error(_("could not read 'onto'"));
+ if (get_oid(buf.buf, &onto_oid)) {
+ strbuf_release(&buf);
+ return error(_("need a HEAD to fixup"));
+ }
+ strbuf_release(&buf);
+
+ if (strbuf_read_file_or_whine(&todo_list.buf, todo_file) < 0)
+ return -1;
+ if (parse_insn_buffer(todo_list.buf.buf, &todo_list) < 0) {
+ todo_list_release(&todo_list);
+ return -1;
+ }
+
+ for (i = 0; i < todo_list.nr; i++) {
+ struct todo_item *item = todo_list.items + i;
+
+ if (item->command >= TODO_NOOP)
+ continue;
+ if (item->command != TODO_PICK)
+ break;
+ if (parse_commit(item->commit)) {
+ todo_list_release(&todo_list);
+ return error(_("could not parse commit '%s'"),
+ oid_to_hex(&item->commit->object.oid));
+ }
+ if (!item->commit->parents)
+ break; /* root commit */
+ if (item->commit->parents->next)
+ break; /* merge commit */
+ parent_oid = &item->commit->parents->item->object.oid;
+ if (hashcmp(parent_oid->hash, oid->hash))
+ break;
+ oid = &item->commit->object.oid;
+ }
+ if (i > 0) {
+ int offset = i < todo_list.nr ?
+ todo_list.items[i].offset_in_buf : todo_list.buf.len;
+ const char *done_path = rebase_path_done();
+
+ fd = open(done_path, O_CREAT | O_WRONLY | O_APPEND, 0666);
+ if (fd < 0) {
+ error_errno(_("could not open '%s' for writing"),
+ done_path);
+ todo_list_release(&todo_list);
+ return -1;
+ }
+ if (write_in_full(fd, todo_list.buf.buf, offset) < 0) {
+ error_errno(_("could not write to '%s'"), done_path);
+ todo_list_release(&todo_list);
+ close(fd);
+ return -1;
+ }
+ close(fd);
+
+ if (rewrite_file(rebase_path_todo(), todo_list.buf.buf + offset,
+ todo_list.buf.len - offset) < 0) {
+ todo_list_release(&todo_list);
+ return -1;
+ }
+
+ todo_list.current = i;
+ if (is_fixup(peek_command(&todo_list, 0)))
+ record_in_rewritten(oid, peek_command(&todo_list, 0));
+ }
+
+ todo_list_release(&todo_list);
+ printf("%s\n", oid_to_hex(oid));
+
+ return 0;
+}
+
+struct subject2item_entry {
+ struct hashmap_entry entry;
+ int i;
+ char subject[FLEX_ARRAY];
+};
+
+static int subject2item_cmp(const void *fndata,
+ const struct subject2item_entry *a,
+ const struct subject2item_entry *b, const void *key)
+{
+ return key ? strcmp(a->subject, key) : strcmp(a->subject, b->subject);
+}
+
+/*
+ * Rearrange the todo list that has both "pick commit-id msg" and "pick
+ * commit-id fixup!/squash! msg" in it so that the latter is put immediately
+ * after the former, and change "pick" to "fixup"/"squash".
+ *
+ * Note that if the config has specified a custom instruction format, each log
+ * message will have to be retrieved from the commit (as the oneline in the
+ * script cannot be trusted) in order to normalize the autosquash arrangement.
+ */
+int rearrange_squash(void)
+{
+ const char *todo_file = rebase_path_todo();
+ struct todo_list todo_list = TODO_LIST_INIT;
+ struct hashmap subject2item;
+ int res = 0, rearranged = 0, *next, *tail, i;
+ char **subjects;
+
+ if (strbuf_read_file_or_whine(&todo_list.buf, todo_file) < 0)
+ return -1;
+ if (parse_insn_buffer(todo_list.buf.buf, &todo_list) < 0) {
+ todo_list_release(&todo_list);
+ return -1;
+ }
+
+ /*
+ * The hashmap maps onelines to the respective todo list index.
+ *
+ * If any items need to be rearranged, the next[i] value will indicate
+ * which item was moved directly after the i'th.
+ *
+ * In that case, last[i] will indicate the index of the latest item to
+ * be moved to appear after the i'th.
+ */
+ hashmap_init(&subject2item, (hashmap_cmp_fn) subject2item_cmp,
+ NULL, todo_list.nr);
+ ALLOC_ARRAY(next, todo_list.nr);
+ ALLOC_ARRAY(tail, todo_list.nr);
+ ALLOC_ARRAY(subjects, todo_list.nr);
+ for (i = 0; i < todo_list.nr; i++) {
+ struct strbuf buf = STRBUF_INIT;
+ struct todo_item *item = todo_list.items + i;
+ const char *commit_buffer, *subject, *p;
+ size_t subject_len;
+ int i2 = -1;
+ struct subject2item_entry *entry;
+
+ next[i] = tail[i] = -1;
+ if (item->command >= TODO_EXEC) {
+ subjects[i] = NULL;
+ continue;
+ }
+
+ if (is_fixup(item->command)) {
+ todo_list_release(&todo_list);
+ return error(_("the script was already rearranged."));
+ }
+
+ item->commit->util = item;
+
+ parse_commit(item->commit);
+ commit_buffer = get_commit_buffer(item->commit, NULL);
+ find_commit_subject(commit_buffer, &subject);
+ format_subject(&buf, subject, " ");
+ subject = subjects[i] = strbuf_detach(&buf, &subject_len);
+ unuse_commit_buffer(item->commit, commit_buffer);
+ if ((skip_prefix(subject, "fixup! ", &p) ||
+ skip_prefix(subject, "squash! ", &p))) {
+ struct commit *commit2;
+
+ for (;;) {
+ while (isspace(*p))
+ p++;
+ if (!skip_prefix(p, "fixup! ", &p) &&
+ !skip_prefix(p, "squash! ", &p))
+ break;
+ }
+
+ if ((entry = hashmap_get_from_hash(&subject2item,
+ strhash(p), p)))
+ /* found by title */
+ i2 = entry->i;
+ else if (!strchr(p, ' ') &&
+ (commit2 =
+ lookup_commit_reference_by_name(p)) &&
+ commit2->util)
+ /* found by commit name */
+ i2 = (struct todo_item *)commit2->util
+ - todo_list.items;
+ else {
+ /* copy can be a prefix of the commit subject */
+ for (i2 = 0; i2 < i; i2++)
+ if (subjects[i2] &&
+ starts_with(subjects[i2], p))
+ break;
+ if (i2 == i)
+ i2 = -1;
+ }
+ }
+ if (i2 >= 0) {
+ rearranged = 1;
+ todo_list.items[i].command =
+ starts_with(subject, "fixup!") ?
+ TODO_FIXUP : TODO_SQUASH;
+ if (next[i2] < 0)
+ next[i2] = i;
+ else
+ next[tail[i2]] = i;
+ tail[i2] = i;
+ } else if (!hashmap_get_from_hash(&subject2item,
+ strhash(subject), subject)) {
+ FLEX_ALLOC_MEM(entry, subject, subject, subject_len);
+ entry->i = i;
+ hashmap_entry_init(entry, strhash(entry->subject));
+ hashmap_put(&subject2item, entry);
+ }
+ }
+
+ if (rearranged) {
+ struct strbuf buf = STRBUF_INIT;
+
+ for (i = 0; i < todo_list.nr; i++) {
+ enum todo_command command = todo_list.items[i].command;
+ int cur = i;
+
+ /*
+ * Initially, all commands are 'pick's. If it is a
+ * fixup or a squash now, we have rearranged it.
+ */
+ if (is_fixup(command))
+ continue;
+
+ while (cur >= 0) {
+ int offset = todo_list.items[cur].offset_in_buf;
+ int end_offset = cur + 1 < todo_list.nr ?
+ todo_list.items[cur + 1].offset_in_buf :
+ todo_list.buf.len;
+ char *bol = todo_list.buf.buf + offset;
+ char *eol = todo_list.buf.buf + end_offset;
+
+ /* replace 'pick', by 'fixup' or 'squash' */
+ command = todo_list.items[cur].command;
+ if (is_fixup(command)) {
+ strbuf_addstr(&buf,
+ todo_command_info[command].str);
+ bol += strcspn(bol, " \t");
+ }
+
+ strbuf_add(&buf, bol, eol - bol);
+
+ cur = next[cur];
+ }
+ }
+
+ res = rewrite_file(todo_file, buf.buf, buf.len);
+ strbuf_release(&buf);
+ }
+
+ free(next);
+ free(tail);
+ for (i = 0; i < todo_list.nr; i++)
+ free(subjects[i]);
+ free(subjects);
+ hashmap_free(&subject2item, 1);
+ todo_list_release(&todo_list);
+
+ return res;
+}