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rebase.c
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rebase.c
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/*
* "git rebase" builtin command
*
* Copyright (c) 2018 Pratik Karki
*/
#define USE_THE_INDEX_COMPATIBILITY_MACROS
#include "builtin.h"
#include "run-command.h"
#include "exec-cmd.h"
#include "strvec.h"
#include "dir.h"
#include "packfile.h"
#include "refs.h"
#include "quote.h"
#include "config.h"
#include "cache-tree.h"
#include "unpack-trees.h"
#include "lockfile.h"
#include "parse-options.h"
#include "commit.h"
#include "diff.h"
#include "wt-status.h"
#include "revision.h"
#include "commit-reach.h"
#include "rerere.h"
#include "branch.h"
#include "sequencer.h"
#include "rebase-interactive.h"
#include "reset.h"
#define DEFAULT_REFLOG_ACTION "rebase"
static char const * const builtin_rebase_usage[] = {
N_("git rebase [-i] [options] [--exec <cmd>] "
"[--onto <newbase> | --keep-base] [<upstream> [<branch>]]"),
N_("git rebase [-i] [options] [--exec <cmd>] [--onto <newbase>] "
"--root [<branch>]"),
N_("git rebase --continue | --abort | --skip | --edit-todo"),
NULL
};
static GIT_PATH_FUNC(path_squash_onto, "rebase-merge/squash-onto")
static GIT_PATH_FUNC(path_interactive, "rebase-merge/interactive")
static GIT_PATH_FUNC(apply_dir, "rebase-apply")
static GIT_PATH_FUNC(merge_dir, "rebase-merge")
enum rebase_type {
REBASE_UNSPECIFIED = -1,
REBASE_APPLY,
REBASE_MERGE,
REBASE_PRESERVE_MERGES
};
enum empty_type {
EMPTY_UNSPECIFIED = -1,
EMPTY_DROP,
EMPTY_KEEP,
EMPTY_ASK
};
struct rebase_options {
enum rebase_type type;
enum empty_type empty;
const char *default_backend;
const char *state_dir;
struct commit *upstream;
const char *upstream_name;
const char *upstream_arg;
char *head_name;
struct object_id orig_head;
struct commit *onto;
const char *onto_name;
const char *revisions;
const char *switch_to;
int root, root_with_onto;
struct object_id *squash_onto;
struct commit *restrict_revision;
int dont_finish_rebase;
enum {
REBASE_NO_QUIET = 1<<0,
REBASE_VERBOSE = 1<<1,
REBASE_DIFFSTAT = 1<<2,
REBASE_FORCE = 1<<3,
REBASE_INTERACTIVE_EXPLICIT = 1<<4,
} flags;
struct strvec git_am_opts;
const char *action;
int signoff;
int allow_rerere_autoupdate;
int keep_empty;
int autosquash;
char *gpg_sign_opt;
int autostash;
int committer_date_is_author_date;
int ignore_date;
char *cmd;
int allow_empty_message;
int rebase_merges, rebase_cousins;
char *strategy, *strategy_opts;
struct strbuf git_format_patch_opt;
int reschedule_failed_exec;
int reapply_cherry_picks;
int fork_point;
};
#define REBASE_OPTIONS_INIT { \
.type = REBASE_UNSPECIFIED, \
.empty = EMPTY_UNSPECIFIED, \
.keep_empty = 1, \
.default_backend = "merge", \
.flags = REBASE_NO_QUIET, \
.git_am_opts = STRVEC_INIT, \
.git_format_patch_opt = STRBUF_INIT, \
.fork_point = -1, \
}
static struct replay_opts get_replay_opts(const struct rebase_options *opts)
{
struct replay_opts replay = REPLAY_OPTS_INIT;
replay.action = REPLAY_INTERACTIVE_REBASE;
replay.strategy = NULL;
sequencer_init_config(&replay);
replay.signoff = opts->signoff;
replay.allow_ff = !(opts->flags & REBASE_FORCE);
if (opts->allow_rerere_autoupdate)
replay.allow_rerere_auto = opts->allow_rerere_autoupdate;
replay.allow_empty = 1;
replay.allow_empty_message = opts->allow_empty_message;
replay.drop_redundant_commits = (opts->empty == EMPTY_DROP);
replay.keep_redundant_commits = (opts->empty == EMPTY_KEEP);
replay.quiet = !(opts->flags & REBASE_NO_QUIET);
replay.verbose = opts->flags & REBASE_VERBOSE;
replay.reschedule_failed_exec = opts->reschedule_failed_exec;
replay.committer_date_is_author_date =
opts->committer_date_is_author_date;
replay.ignore_date = opts->ignore_date;
replay.gpg_sign = xstrdup_or_null(opts->gpg_sign_opt);
if (opts->strategy)
replay.strategy = opts->strategy;
else if (!replay.strategy && replay.default_strategy) {
replay.strategy = replay.default_strategy;
replay.default_strategy = NULL;
}
if (opts->strategy_opts)
parse_strategy_opts(&replay, opts->strategy_opts);
if (opts->squash_onto) {
oidcpy(&replay.squash_onto, opts->squash_onto);
replay.have_squash_onto = 1;
}
return replay;
}
enum action {
ACTION_NONE = 0,
ACTION_CONTINUE,
ACTION_SKIP,
ACTION_ABORT,
ACTION_QUIT,
ACTION_EDIT_TODO,
ACTION_SHOW_CURRENT_PATCH,
ACTION_SHORTEN_OIDS,
ACTION_EXPAND_OIDS,
ACTION_CHECK_TODO_LIST,
ACTION_REARRANGE_SQUASH,
ACTION_ADD_EXEC
};
static const char *action_names[] = { "undefined",
"continue",
"skip",
"abort",
"quit",
"edit_todo",
"show_current_patch" };
static int add_exec_commands(struct string_list *commands)
{
const char *todo_file = rebase_path_todo();
struct todo_list todo_list = TODO_LIST_INIT;
int res;
if (strbuf_read_file(&todo_list.buf, todo_file, 0) < 0)
return error_errno(_("could not read '%s'."), todo_file);
if (todo_list_parse_insn_buffer(the_repository, todo_list.buf.buf,
&todo_list)) {
todo_list_release(&todo_list);
return error(_("unusable todo list: '%s'"), todo_file);
}
todo_list_add_exec_commands(&todo_list, commands);
res = todo_list_write_to_file(the_repository, &todo_list,
todo_file, NULL, NULL, -1, 0);
todo_list_release(&todo_list);
if (res)
return error_errno(_("could not write '%s'."), todo_file);
return 0;
}
static int rearrange_squash_in_todo_file(void)
{
const char *todo_file = rebase_path_todo();
struct todo_list todo_list = TODO_LIST_INIT;
int res = 0;
if (strbuf_read_file(&todo_list.buf, todo_file, 0) < 0)
return error_errno(_("could not read '%s'."), todo_file);
if (todo_list_parse_insn_buffer(the_repository, todo_list.buf.buf,
&todo_list)) {
todo_list_release(&todo_list);
return error(_("unusable todo list: '%s'"), todo_file);
}
res = todo_list_rearrange_squash(&todo_list);
if (!res)
res = todo_list_write_to_file(the_repository, &todo_list,
todo_file, NULL, NULL, -1, 0);
todo_list_release(&todo_list);
if (res)
return error_errno(_("could not write '%s'."), todo_file);
return 0;
}
static int transform_todo_file(unsigned flags)
{
const char *todo_file = rebase_path_todo();
struct todo_list todo_list = TODO_LIST_INIT;
int res;
if (strbuf_read_file(&todo_list.buf, todo_file, 0) < 0)
return error_errno(_("could not read '%s'."), todo_file);
if (todo_list_parse_insn_buffer(the_repository, todo_list.buf.buf,
&todo_list)) {
todo_list_release(&todo_list);
return error(_("unusable todo list: '%s'"), todo_file);
}
res = todo_list_write_to_file(the_repository, &todo_list, todo_file,
NULL, NULL, -1, flags);
todo_list_release(&todo_list);
if (res)
return error_errno(_("could not write '%s'."), todo_file);
return 0;
}
static int edit_todo_file(unsigned flags)
{
const char *todo_file = rebase_path_todo();
struct todo_list todo_list = TODO_LIST_INIT,
new_todo = TODO_LIST_INIT;
int res = 0;
if (strbuf_read_file(&todo_list.buf, todo_file, 0) < 0)
return error_errno(_("could not read '%s'."), todo_file);
strbuf_stripspace(&todo_list.buf, 1);
res = edit_todo_list(the_repository, &todo_list, &new_todo, NULL, NULL, flags);
if (!res && todo_list_write_to_file(the_repository, &new_todo, todo_file,
NULL, NULL, -1, flags & ~(TODO_LIST_SHORTEN_IDS)))
res = error_errno(_("could not write '%s'"), todo_file);
todo_list_release(&todo_list);
todo_list_release(&new_todo);
return res;
}
static int get_revision_ranges(struct commit *upstream, struct commit *onto,
struct object_id *orig_head, char **revisions,
char **shortrevisions)
{
struct commit *base_rev = upstream ? upstream : onto;
const char *shorthead;
*revisions = xstrfmt("%s...%s", oid_to_hex(&base_rev->object.oid),
oid_to_hex(orig_head));
shorthead = find_unique_abbrev(orig_head, DEFAULT_ABBREV);
if (upstream) {
const char *shortrev;
shortrev = find_unique_abbrev(&base_rev->object.oid,
DEFAULT_ABBREV);
*shortrevisions = xstrfmt("%s..%s", shortrev, shorthead);
} else
*shortrevisions = xstrdup(shorthead);
return 0;
}
static int init_basic_state(struct replay_opts *opts, const char *head_name,
struct commit *onto,
const struct object_id *orig_head)
{
FILE *interactive;
if (!is_directory(merge_dir()) && mkdir_in_gitdir(merge_dir()))
return error_errno(_("could not create temporary %s"), merge_dir());
delete_reflog("REBASE_HEAD");
interactive = fopen(path_interactive(), "w");
if (!interactive)
return error_errno(_("could not mark as interactive"));
fclose(interactive);
return write_basic_state(opts, head_name, onto, orig_head);
}
static void split_exec_commands(const char *cmd, struct string_list *commands)
{
if (cmd && *cmd) {
string_list_split(commands, cmd, '\n', -1);
/* rebase.c adds a new line to cmd after every command,
* so here the last command is always empty */
string_list_remove_empty_items(commands, 0);
}
}
static int do_interactive_rebase(struct rebase_options *opts, unsigned flags)
{
int ret;
char *revisions = NULL, *shortrevisions = NULL;
struct strvec make_script_args = STRVEC_INIT;
struct todo_list todo_list = TODO_LIST_INIT;
struct replay_opts replay = get_replay_opts(opts);
struct string_list commands = STRING_LIST_INIT_DUP;
if (get_revision_ranges(opts->upstream, opts->onto, &opts->orig_head,
&revisions, &shortrevisions))
return -1;
if (init_basic_state(&replay,
opts->head_name ? opts->head_name : "detached HEAD",
opts->onto, &opts->orig_head)) {
free(revisions);
free(shortrevisions);
return -1;
}
if (!opts->upstream && opts->squash_onto)
write_file(path_squash_onto(), "%s\n",
oid_to_hex(opts->squash_onto));
strvec_pushl(&make_script_args, "", revisions, NULL);
if (opts->restrict_revision)
strvec_pushf(&make_script_args, "^%s",
oid_to_hex(&opts->restrict_revision->object.oid));
ret = sequencer_make_script(the_repository, &todo_list.buf,
make_script_args.nr, make_script_args.v,
flags);
if (ret)
error(_("could not generate todo list"));
else {
discard_cache();
if (todo_list_parse_insn_buffer(the_repository, todo_list.buf.buf,
&todo_list))
BUG("unusable todo list");
split_exec_commands(opts->cmd, &commands);
ret = complete_action(the_repository, &replay, flags,
shortrevisions, opts->onto_name, opts->onto,
&opts->orig_head, &commands, opts->autosquash,
&todo_list);
}
string_list_clear(&commands, 0);
free(revisions);
free(shortrevisions);
todo_list_release(&todo_list);
strvec_clear(&make_script_args);
return ret;
}
static int run_sequencer_rebase(struct rebase_options *opts,
enum action command)
{
unsigned flags = 0;
int abbreviate_commands = 0, ret = 0;
git_config_get_bool("rebase.abbreviatecommands", &abbreviate_commands);
flags |= opts->keep_empty ? TODO_LIST_KEEP_EMPTY : 0;
flags |= abbreviate_commands ? TODO_LIST_ABBREVIATE_CMDS : 0;
flags |= opts->rebase_merges ? TODO_LIST_REBASE_MERGES : 0;
flags |= opts->rebase_cousins > 0 ? TODO_LIST_REBASE_COUSINS : 0;
flags |= opts->root_with_onto ? TODO_LIST_ROOT_WITH_ONTO : 0;
flags |= command == ACTION_SHORTEN_OIDS ? TODO_LIST_SHORTEN_IDS : 0;
flags |= opts->reapply_cherry_picks ? TODO_LIST_REAPPLY_CHERRY_PICKS : 0;
switch (command) {
case ACTION_NONE: {
if (!opts->onto && !opts->upstream)
die(_("a base commit must be provided with --upstream or --onto"));
ret = do_interactive_rebase(opts, flags);
break;
}
case ACTION_SKIP: {
struct string_list merge_rr = STRING_LIST_INIT_DUP;
rerere_clear(the_repository, &merge_rr);
}
/* fallthrough */
case ACTION_CONTINUE: {
struct replay_opts replay_opts = get_replay_opts(opts);
ret = sequencer_continue(the_repository, &replay_opts);
break;
}
case ACTION_EDIT_TODO:
ret = edit_todo_file(flags);
break;
case ACTION_SHOW_CURRENT_PATCH: {
struct child_process cmd = CHILD_PROCESS_INIT;
cmd.git_cmd = 1;
strvec_pushl(&cmd.args, "show", "REBASE_HEAD", "--", NULL);
ret = run_command(&cmd);
break;
}
case ACTION_SHORTEN_OIDS:
case ACTION_EXPAND_OIDS:
ret = transform_todo_file(flags);
break;
case ACTION_CHECK_TODO_LIST:
ret = check_todo_list_from_file(the_repository);
break;
case ACTION_REARRANGE_SQUASH:
ret = rearrange_squash_in_todo_file();
break;
case ACTION_ADD_EXEC: {
struct string_list commands = STRING_LIST_INIT_DUP;
split_exec_commands(opts->cmd, &commands);
ret = add_exec_commands(&commands);
string_list_clear(&commands, 0);
break;
}
default:
BUG("invalid command '%d'", command);
}
return ret;
}
static void imply_merge(struct rebase_options *opts, const char *option);
static int parse_opt_keep_empty(const struct option *opt, const char *arg,
int unset)
{
struct rebase_options *opts = opt->value;
BUG_ON_OPT_ARG(arg);
imply_merge(opts, unset ? "--no-keep-empty" : "--keep-empty");
opts->keep_empty = !unset;
opts->type = REBASE_MERGE;
return 0;
}
static const char * const builtin_rebase_interactive_usage[] = {
N_("git rebase--interactive [<options>]"),
NULL
};
int cmd_rebase__interactive(int argc, const char **argv, const char *prefix)
{
struct rebase_options opts = REBASE_OPTIONS_INIT;
struct object_id squash_onto = null_oid;
enum action command = ACTION_NONE;
struct option options[] = {
OPT_NEGBIT(0, "ff", &opts.flags, N_("allow fast-forward"),
REBASE_FORCE),
OPT_CALLBACK_F('k', "keep-empty", &options, NULL,
N_("keep commits which start empty"),
PARSE_OPT_NOARG | PARSE_OPT_HIDDEN,
parse_opt_keep_empty),
OPT_BOOL_F(0, "allow-empty-message", &opts.allow_empty_message,
N_("allow commits with empty messages"),
PARSE_OPT_HIDDEN),
OPT_BOOL(0, "rebase-merges", &opts.rebase_merges, N_("rebase merge commits")),
OPT_BOOL(0, "rebase-cousins", &opts.rebase_cousins,
N_("keep original branch points of cousins")),
OPT_BOOL(0, "autosquash", &opts.autosquash,
N_("move commits that begin with squash!/fixup!")),
OPT_BOOL(0, "signoff", &opts.signoff, N_("sign commits")),
OPT_BIT('v', "verbose", &opts.flags,
N_("display a diffstat of what changed upstream"),
REBASE_NO_QUIET | REBASE_VERBOSE | REBASE_DIFFSTAT),
OPT_CMDMODE(0, "continue", &command, N_("continue rebase"),
ACTION_CONTINUE),
OPT_CMDMODE(0, "skip", &command, N_("skip commit"), ACTION_SKIP),
OPT_CMDMODE(0, "edit-todo", &command, N_("edit the todo list"),
ACTION_EDIT_TODO),
OPT_CMDMODE(0, "show-current-patch", &command, N_("show the current patch"),
ACTION_SHOW_CURRENT_PATCH),
OPT_CMDMODE(0, "shorten-ids", &command,
N_("shorten commit ids in the todo list"), ACTION_SHORTEN_OIDS),
OPT_CMDMODE(0, "expand-ids", &command,
N_("expand commit ids in the todo list"), ACTION_EXPAND_OIDS),
OPT_CMDMODE(0, "check-todo-list", &command,
N_("check the todo list"), ACTION_CHECK_TODO_LIST),
OPT_CMDMODE(0, "rearrange-squash", &command,
N_("rearrange fixup/squash lines"), ACTION_REARRANGE_SQUASH),
OPT_CMDMODE(0, "add-exec-commands", &command,
N_("insert exec commands in todo list"), ACTION_ADD_EXEC),
{ OPTION_CALLBACK, 0, "onto", &opts.onto, N_("onto"), N_("onto"),
PARSE_OPT_NONEG, parse_opt_commit, 0 },
{ OPTION_CALLBACK, 0, "restrict-revision", &opts.restrict_revision,
N_("restrict-revision"), N_("restrict revision"),
PARSE_OPT_NONEG, parse_opt_commit, 0 },
{ OPTION_CALLBACK, 0, "squash-onto", &squash_onto, N_("squash-onto"),
N_("squash onto"), PARSE_OPT_NONEG, parse_opt_object_id, 0 },
{ OPTION_CALLBACK, 0, "upstream", &opts.upstream, N_("upstream"),
N_("the upstream commit"), PARSE_OPT_NONEG, parse_opt_commit,
0 },
OPT_STRING(0, "head-name", &opts.head_name, N_("head-name"), N_("head name")),
{ OPTION_STRING, 'S', "gpg-sign", &opts.gpg_sign_opt, N_("key-id"),
N_("GPG-sign commits"),
PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
OPT_STRING(0, "strategy", &opts.strategy, N_("strategy"),
N_("rebase strategy")),
OPT_STRING(0, "strategy-opts", &opts.strategy_opts, N_("strategy-opts"),
N_("strategy options")),
OPT_STRING(0, "switch-to", &opts.switch_to, N_("switch-to"),
N_("the branch or commit to checkout")),
OPT_STRING(0, "onto-name", &opts.onto_name, N_("onto-name"), N_("onto name")),
OPT_STRING(0, "cmd", &opts.cmd, N_("cmd"), N_("the command to run")),
OPT_RERERE_AUTOUPDATE(&opts.allow_rerere_autoupdate),
OPT_BOOL(0, "reschedule-failed-exec", &opts.reschedule_failed_exec,
N_("automatically re-schedule any `exec` that fails")),
OPT_END()
};
opts.rebase_cousins = -1;
if (argc == 1)
usage_with_options(builtin_rebase_interactive_usage, options);
argc = parse_options(argc, argv, prefix, options,
builtin_rebase_interactive_usage, PARSE_OPT_KEEP_ARGV0);
if (!is_null_oid(&squash_onto))
opts.squash_onto = &squash_onto;
if (opts.rebase_cousins >= 0 && !opts.rebase_merges)
warning(_("--[no-]rebase-cousins has no effect without "
"--rebase-merges"));
return !!run_sequencer_rebase(&opts, command);
}
static int is_merge(struct rebase_options *opts)
{
return opts->type == REBASE_MERGE ||
opts->type == REBASE_PRESERVE_MERGES;
}
static void imply_merge(struct rebase_options *opts, const char *option)
{
switch (opts->type) {
case REBASE_APPLY:
die(_("%s requires the merge backend"), option);
break;
case REBASE_MERGE:
case REBASE_PRESERVE_MERGES:
break;
default:
opts->type = REBASE_MERGE; /* implied */
break;
}
}
/* Returns the filename prefixed by the state_dir */
static const char *state_dir_path(const char *filename, struct rebase_options *opts)
{
static struct strbuf path = STRBUF_INIT;
static size_t prefix_len;
if (!prefix_len) {
strbuf_addf(&path, "%s/", opts->state_dir);
prefix_len = path.len;
}
strbuf_setlen(&path, prefix_len);
strbuf_addstr(&path, filename);
return path.buf;
}
/* Initialize the rebase options from the state directory. */
static int read_basic_state(struct rebase_options *opts)
{
struct strbuf head_name = STRBUF_INIT;
struct strbuf buf = STRBUF_INIT;
struct object_id oid;
if (!read_oneliner(&head_name, state_dir_path("head-name", opts),
READ_ONELINER_WARN_MISSING) ||
!read_oneliner(&buf, state_dir_path("onto", opts),
READ_ONELINER_WARN_MISSING))
return -1;
opts->head_name = starts_with(head_name.buf, "refs/") ?
xstrdup(head_name.buf) : NULL;
strbuf_release(&head_name);
if (get_oid(buf.buf, &oid))
return error(_("could not get 'onto': '%s'"), buf.buf);
opts->onto = lookup_commit_or_die(&oid, buf.buf);
/*
* We always write to orig-head, but interactive rebase used to write to
* head. Fall back to reading from head to cover for the case that the
* user upgraded git with an ongoing interactive rebase.
*/
strbuf_reset(&buf);
if (file_exists(state_dir_path("orig-head", opts))) {
if (!read_oneliner(&buf, state_dir_path("orig-head", opts),
READ_ONELINER_WARN_MISSING))
return -1;
} else if (!read_oneliner(&buf, state_dir_path("head", opts),
READ_ONELINER_WARN_MISSING))
return -1;
if (get_oid(buf.buf, &opts->orig_head))
return error(_("invalid orig-head: '%s'"), buf.buf);
if (file_exists(state_dir_path("quiet", opts)))
opts->flags &= ~REBASE_NO_QUIET;
else
opts->flags |= REBASE_NO_QUIET;
if (file_exists(state_dir_path("verbose", opts)))
opts->flags |= REBASE_VERBOSE;
if (file_exists(state_dir_path("signoff", opts))) {
opts->signoff = 1;
opts->flags |= REBASE_FORCE;
}
if (file_exists(state_dir_path("allow_rerere_autoupdate", opts))) {
strbuf_reset(&buf);
if (!read_oneliner(&buf, state_dir_path("allow_rerere_autoupdate", opts),
READ_ONELINER_WARN_MISSING))
return -1;
if (!strcmp(buf.buf, "--rerere-autoupdate"))
opts->allow_rerere_autoupdate = RERERE_AUTOUPDATE;
else if (!strcmp(buf.buf, "--no-rerere-autoupdate"))
opts->allow_rerere_autoupdate = RERERE_NOAUTOUPDATE;
else
warning(_("ignoring invalid allow_rerere_autoupdate: "
"'%s'"), buf.buf);
}
if (file_exists(state_dir_path("gpg_sign_opt", opts))) {
strbuf_reset(&buf);
if (!read_oneliner(&buf, state_dir_path("gpg_sign_opt", opts),
READ_ONELINER_WARN_MISSING))
return -1;
free(opts->gpg_sign_opt);
opts->gpg_sign_opt = xstrdup(buf.buf);
}
if (file_exists(state_dir_path("strategy", opts))) {
strbuf_reset(&buf);
if (!read_oneliner(&buf, state_dir_path("strategy", opts),
READ_ONELINER_WARN_MISSING))
return -1;
free(opts->strategy);
opts->strategy = xstrdup(buf.buf);
}
if (file_exists(state_dir_path("strategy_opts", opts))) {
strbuf_reset(&buf);
if (!read_oneliner(&buf, state_dir_path("strategy_opts", opts),
READ_ONELINER_WARN_MISSING))
return -1;
free(opts->strategy_opts);
opts->strategy_opts = xstrdup(buf.buf);
}
strbuf_release(&buf);
return 0;
}
static int rebase_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));
if (!(opts->flags & REBASE_NO_QUIET))
write_file(state_dir_path("quiet", opts), "%s", "");
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 == 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("signoff", opts), "--signoff");
return 0;
}
static int finish_rebase(struct rebase_options *opts)
{
struct strbuf dir = STRBUF_INIT;
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);
/*
* We ignore errors in 'git maintenance run --auto', since the
* user should see them.
*/
run_auto_maintenance(!(opts->flags & (REBASE_NO_QUIET|REBASE_VERBOSE)));
if (opts->type == REBASE_MERGE) {
struct replay_opts replay = REPLAY_OPTS_INIT;
replay.action = REPLAY_INTERACTIVE_REBASE;
ret = sequencer_remove_state(&replay);
} else {
strbuf_addstr(&dir, opts->state_dir);
if (remove_dir_recursively(&dir, 0))
ret = error(_("could not remove '%s'"),
opts->state_dir);
strbuf_release(&dir);
}
return ret;
}
static struct commit *peel_committish(const char *name)
{
struct object *obj;
struct object_id oid;
if (get_oid(name, &oid))
return NULL;
obj = parse_object(the_repository, &oid);
return (struct commit *)peel_to_type(name, 0, obj, OBJ_COMMIT);
}
static void add_var(struct strbuf *buf, const char *name, const char *value)
{
if (!value)
strbuf_addf(buf, "unset %s; ", name);
else {
strbuf_addf(buf, "%s=", name);
sq_quote_buf(buf, value);
strbuf_addstr(buf, "; ");
}
}
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(the_repository, NULL, "", opts->head_name,
RESET_HEAD_REFS_ONLY,
orig_head_reflog.buf, head_reflog.buf,
DEFAULT_REFLOG_ACTION);
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"
"You can instead skip this commit: run \"git rebase --skip\".\n"
"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;
strvec_push(&am.args, "am");
if (opts->action && !strcmp("continue", opts->action)) {
strvec_push(&am.args, "--resolved");
strvec_pushf(&am.args, "--resolvemsg=%s", resolvemsg);
if (opts->gpg_sign_opt)
strvec_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)) {
strvec_push(&am.args, "--skip");
strvec_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)) {
strvec_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);
strvec_clear(&am.args);
return status;
}
format_patch.git_cmd = 1;
strvec_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",
"--no-base", NULL);
if (opts->git_format_patch_opt.len)
strvec_split(&format_patch.args,
opts->git_format_patch_opt.buf);
strvec_push(&format_patch.args, revisions.buf);
if (opts->restrict_revision)
strvec_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);
strvec_clear(&am.args);
reset_head(the_repository, &opts->orig_head, "checkout",
opts->head_name, 0,
"HEAD", NULL, DEFAULT_REFLOG_ACTION);
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);
strvec_clear(&am.args);
return status;
}
strvec_pushv(&am.args, opts->git_am_opts.v);
strvec_push(&am.args, "--rebasing");
strvec_pushf(&am.args, "--resolvemsg=%s", resolvemsg);
strvec_push(&am.args, "--patch-format=mboxrd");
if (opts->allow_rerere_autoupdate == RERERE_AUTOUPDATE)
strvec_push(&am.args, "--rerere-autoupdate");
else if (opts->allow_rerere_autoupdate == RERERE_NOAUTOUPDATE)
strvec_push(&am.args, "--no-rerere-autoupdate");
if (opts->gpg_sign_opt)
strvec_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))
rebase_write_basic_state(opts);
return status;
}
static int run_specific_rebase(struct rebase_options *opts, enum action action)
{
const char *argv[] = { NULL, NULL };
struct strbuf script_snippet = STRBUF_INIT, buf = STRBUF_INIT;
int status;
const char *backend, *backend_func;
if (opts->type == REBASE_MERGE) {
/* Run sequencer-based rebase */
setenv("GIT_CHERRY_PICK_HELP", resolvemsg, 1);
if (!(opts->flags & REBASE_INTERACTIVE_EXPLICIT)) {
setenv("GIT_SEQUENCE_EDITOR", ":", 1);
opts->autosquash = 0;
}
if (opts->gpg_sign_opt) {
/* remove the leading "-S" */
char *tmp = xstrdup(opts->gpg_sign_opt + 2);
free(opts->gpg_sign_opt);
opts->gpg_sign_opt = tmp;
}
status = run_sequencer_rebase(opts, action);
goto finished_rebase;
}
if (opts->type == REBASE_APPLY) {
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);
add_var(&script_snippet, "upstream_name", opts->upstream_name);
add_var(&script_snippet, "upstream", opts->upstream ?
oid_to_hex(&opts->upstream->object.oid) : NULL);
add_var(&script_snippet, "head_name",
opts->head_name ? opts->head_name : "detached HEAD");
add_var(&script_snippet, "orig_head", oid_to_hex(&opts->orig_head));
add_var(&script_snippet, "onto", opts->onto ?
oid_to_hex(&opts->onto->object.oid) : NULL);
add_var(&script_snippet, "onto_name", opts->onto_name);
add_var(&script_snippet, "revisions", opts->revisions);
add_var(&script_snippet, "restrict_revision", opts->restrict_revision ?
oid_to_hex(&opts->restrict_revision->object.oid) : NULL);
sq_quote_argv_pretty(&buf, opts->git_am_opts.v);
add_var(&script_snippet, "git_am_opt", buf.buf);
strbuf_release(&buf);
add_var(&script_snippet, "verbose",
opts->flags & REBASE_VERBOSE ? "t" : "");
add_var(&script_snippet, "diffstat",
opts->flags & REBASE_DIFFSTAT ? "t" : "");
add_var(&script_snippet, "force_rebase",
opts->flags & REBASE_FORCE ? "t" : "");
if (opts->switch_to)
add_var(&script_snippet, "switch_to", opts->switch_to);
add_var(&script_snippet, "action", opts->action ? opts->action : "");
add_var(&script_snippet, "signoff", opts->signoff ? "--signoff" : "");
add_var(&script_snippet, "allow_rerere_autoupdate",
opts->allow_rerere_autoupdate ?