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tvl-depot/third_party/git/builtin/rebase.c
Vincent Ambo f4609b896f merge(3p/git): Merge git subtree at v2.29.2 
This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because
there is some breakage in the git build related to the netrc
credentials helper which someone has taken care of in nixpkgs.

The stable channel is not used for anything other than git, so this
should be fine.

Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb
2020-11-21 19:45:56 +01:00

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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 use_legacy_rebase;
int reapply_cherry_picks;
};
#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 \
}
static struct replay_opts get_replay_opts(const struct rebase_options *opts)
{
struct replay_opts replay = REPLAY_OPTS_INIT;
replay.action = REPLAY_INTERACTIVE_REBASE;
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);
replay.strategy = opts->strategy;
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, const char **head_hash,
char **revisions, char **shortrevisions)
{
struct commit *base_rev = upstream ? upstream : onto;
const char *shorthead;
*head_hash = find_unique_abbrev(orig_head, GIT_MAX_HEXSZ);
*revisions = xstrfmt("%s...%s", oid_to_hex(&base_rev->object.oid),
*head_hash);
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 char *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;
const char *head_hash = NULL;
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,
&head_hash, &revisions, &shortrevisions))
return -1;
if (init_basic_state(&replay,
opts->head_name ? opts->head_name : "detached HEAD",
opts->onto, head_hash)) {
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, head_hash,
&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);
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 ?
opts->allow_rerere_autoupdate == RERERE_AUTOUPDATE ?
"--rerere-autoupdate" : "--no-rerere-autoupdate" : "");
add_var(&script_snippet, "keep_empty", opts->keep_empty ? "yes" : "");
add_var(&script_snippet, "autosquash", opts->autosquash ? "t" : "");
add_var(&script_snippet, "gpg_sign_opt", opts->gpg_sign_opt);
add_var(&script_snippet, "cmd", opts->cmd);
add_var(&script_snippet, "allow_empty_message",
opts->allow_empty_message ? "--allow-empty-message" : "");
add_var(&script_snippet, "rebase_merges",
opts->rebase_merges ? "t" : "");
add_var(&script_snippet, "rebase_cousins",
opts->rebase_cousins ? "t" : "");
add_var(&script_snippet, "strategy", opts->strategy);
add_var(&script_snippet, "strategy_opts", opts->strategy_opts);
add_var(&script_snippet, "rebase_root", opts->root ? "t" : "");
add_var(&script_snippet, "squash_onto",
opts->squash_onto ? oid_to_hex(opts->squash_onto) : "");
add_var(&script_snippet, "git_format_patch_opt",
opts->git_format_patch_opt.buf);
if (is_merge(opts) &&
!(opts->flags & REBASE_INTERACTIVE_EXPLICIT)) {
strbuf_addstr(&script_snippet,
"GIT_SEQUENCE_EDITOR=:; export GIT_SEQUENCE_EDITOR; ");
opts->autosquash = 0;
}
switch (opts->type) {
case REBASE_PRESERVE_MERGES:
backend = "git-rebase--preserve-merges";
backend_func = "git_rebase__preserve_merges";
break;
default:
BUG("Unhandled rebase type %d", opts->type);
break;
}
strbuf_addf(&script_snippet,
". git-sh-setup && . %s && %s", backend, backend_func);
argv[0] = script_snippet.buf;
status = run_command_v_opt(argv, RUN_USING_SHELL);
finished_rebase:
if (opts->dont_finish_rebase)
; /* do nothing */
else if (opts->type == REBASE_MERGE)
; /* merge backend cleans up after itself */
else if (status == 0) {
if (!file_exists(state_dir_path("stopped-sha", opts)))
finish_rebase(opts);
} else if (status == 2) {
struct strbuf dir = STRBUF_INIT;
apply_autostash(state_dir_path("autostash", opts));
strbuf_addstr(&dir, opts->state_dir);
remove_dir_recursively(&dir, 0);
strbuf_release(&dir);
die("Nothing to do");
}
strbuf_release(&script_snippet);
return status ? -1 : 0;
}
static int rebase_config(const char *var, const char *value, void *data)
{
struct rebase_options *opts = data;
if (!strcmp(var, "rebase.stat")) {
if (git_config_bool(var, value))
opts->flags |= REBASE_DIFFSTAT;
else
opts->flags &= ~REBASE_DIFFSTAT;
return 0;
}
if (!strcmp(var, "rebase.autosquash")) {
opts->autosquash = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "commit.gpgsign")) {
free(opts->gpg_sign_opt);
opts->gpg_sign_opt = git_config_bool(var, value) ?
xstrdup("-S") : NULL;
return 0;
}
if (!strcmp(var, "rebase.autostash")) {
opts->autostash = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "rebase.reschedulefailedexec")) {
opts->reschedule_failed_exec = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "rebase.usebuiltin")) {
opts->use_legacy_rebase = !git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "rebase.backend")) {
return git_config_string(&opts->default_backend, var, value);
}
return git_default_config(var, value, data);
}
/*
* Determines whether the commits in from..to are linear, i.e. contain
* no merge commits. This function *expects* `from` to be an ancestor of
* `to`.
*/
static int is_linear_history(struct commit *from, struct commit *to)
{
while (to && to != from) {
parse_commit(to);
if (!to->parents)
return 1;
if (to->parents->next)
return 0;
to = to->parents->item;
}
return 1;
}
static int can_fast_forward(struct commit *onto, struct commit *upstream,
struct commit *restrict_revision,
struct object_id *head_oid, struct object_id *merge_base)
{
struct commit *head = lookup_commit(the_repository, head_oid);
struct commit_list *merge_bases = NULL;
int res = 0;
if (!head)
goto done;
merge_bases = get_merge_bases(onto, head);
if (!merge_bases || merge_bases->next) {
oidcpy(merge_base, &null_oid);
goto done;
}
oidcpy(merge_base, &merge_bases->item->object.oid);
if (!oideq(merge_base, &onto->object.oid))
goto done;
if (restrict_revision && !oideq(&restrict_revision->object.oid, merge_base))
goto done;
if (!upstream)
goto done;
free_commit_list(merge_bases);
merge_bases = get_merge_bases(upstream, head);
if (!merge_bases || merge_bases->next)
goto done;
if (!oideq(&onto->object.oid, &merge_bases->item->object.oid))
goto done;
res = 1;
done:
free_commit_list(merge_bases);
return res && is_linear_history(onto, head);
}
static int parse_opt_am(const struct option *opt, const char *arg, int unset)
{
struct rebase_options *opts = opt->value;
BUG_ON_OPT_NEG(unset);
BUG_ON_OPT_ARG(arg);
opts->type = REBASE_APPLY;
return 0;
}
/* -i followed by -m is still -i */
static int parse_opt_merge(const struct option *opt, const char *arg, int unset)
{
struct rebase_options *opts = opt->value;
BUG_ON_OPT_NEG(unset);
BUG_ON_OPT_ARG(arg);
if (!is_merge(opts))
opts->type = REBASE_MERGE;
return 0;
}
/* -i followed by -p is still explicitly interactive, but -p alone is not */
static int parse_opt_interactive(const struct option *opt, const char *arg,
int unset)
{
struct rebase_options *opts = opt->value;
BUG_ON_OPT_NEG(unset);
BUG_ON_OPT_ARG(arg);
opts->type = REBASE_MERGE;
opts->flags |= REBASE_INTERACTIVE_EXPLICIT;
return 0;
}
static enum empty_type parse_empty_value(const char *value)
{
if (!strcasecmp(value, "drop"))
return EMPTY_DROP;
else if (!strcasecmp(value, "keep"))
return EMPTY_KEEP;
else if (!strcasecmp(value, "ask"))
return EMPTY_ASK;
die(_("unrecognized empty type '%s'; valid values are \"drop\", \"keep\", and \"ask\"."), value);
}
static int parse_opt_empty(const struct option *opt, const char *arg, int unset)
{
struct rebase_options *options = opt->value;
enum empty_type value = parse_empty_value(arg);
BUG_ON_OPT_NEG(unset);
options->empty = value;
return 0;
}
static void NORETURN error_on_missing_default_upstream(void)
{
struct branch *current_branch = branch_get(NULL);
printf(_("%s\n"
"Please specify which branch you want to rebase against.\n"
"See git-rebase(1) for details.\n"
"\n"
" git rebase '<branch>'\n"
"\n"),
current_branch ? _("There is no tracking information for "
"the current branch.") :
_("You are not currently on a branch."));
if (current_branch) {
const char *remote = current_branch->remote_name;
if (!remote)
remote = _("<remote>");
printf(_("If you wish to set tracking information for this "
"branch you can do so with:\n"
"\n"
" git branch --set-upstream-to=%s/<branch> %s\n"
"\n"),
remote, current_branch->name);
}
exit(1);
}
static void set_reflog_action(struct rebase_options *options)
{
const char *env;
struct strbuf buf = STRBUF_INIT;
if (!is_merge(options))
return;
env = getenv(GIT_REFLOG_ACTION_ENVIRONMENT);
if (env && strcmp("rebase", env))
return; /* only override it if it is "rebase" */
strbuf_addf(&buf, "rebase (%s)", options->action);
setenv(GIT_REFLOG_ACTION_ENVIRONMENT, buf.buf, 1);
strbuf_release(&buf);
}
static int check_exec_cmd(const char *cmd)
{
if (strchr(cmd, '\n'))
return error(_("exec commands cannot contain newlines"));
/* Does the command consist purely of whitespace? */
if (!cmd[strspn(cmd, " \t\r\f\v")])
return error(_("empty exec command"));
return 0;
}
int cmd_rebase(int argc, const char **argv, const char *prefix)
{
struct rebase_options options = REBASE_OPTIONS_INIT;
const char *branch_name;
int ret, flags, total_argc, in_progress = 0;
int keep_base = 0;
int ok_to_skip_pre_rebase = 0;
struct strbuf msg = STRBUF_INIT;
struct strbuf revisions = STRBUF_INIT;
struct strbuf buf = STRBUF_INIT;
struct object_id merge_base;
int ignore_whitespace = 0;
enum action action = ACTION_NONE;
const char *gpg_sign = NULL;
struct string_list exec = STRING_LIST_INIT_NODUP;
const char *rebase_merges = NULL;
int fork_point = -1;
struct string_list strategy_options = STRING_LIST_INIT_NODUP;
struct object_id squash_onto;
char *squash_onto_name = NULL;
int reschedule_failed_exec = -1;
int allow_preemptive_ff = 1;
struct option builtin_rebase_options[] = {
OPT_STRING(0, "onto", &options.onto_name,
N_("revision"),
N_("rebase onto given branch instead of upstream")),
OPT_BOOL(0, "keep-base", &keep_base,
N_("use the merge-base of upstream and branch as the current base")),
OPT_BOOL(0, "no-verify", &ok_to_skip_pre_rebase,
N_("allow pre-rebase hook to run")),
OPT_NEGBIT('q', "quiet", &options.flags,
N_("be quiet. implies --no-stat"),
REBASE_NO_QUIET | REBASE_VERBOSE | REBASE_DIFFSTAT),
OPT_BIT('v', "verbose", &options.flags,
N_("display a diffstat of what changed upstream"),
REBASE_NO_QUIET | REBASE_VERBOSE | REBASE_DIFFSTAT),
{OPTION_NEGBIT, 'n', "no-stat", &options.flags, NULL,
N_("do not show diffstat of what changed upstream"),
PARSE_OPT_NOARG, NULL, REBASE_DIFFSTAT },
OPT_BOOL(0, "signoff", &options.signoff,
N_("add a Signed-off-by: line to each commit")),
OPT_BOOL(0, "committer-date-is-author-date",
&options.committer_date_is_author_date,
N_("make committer date match author date")),
OPT_BOOL(0, "reset-author-date", &options.ignore_date,
N_("ignore author date and use current date")),
OPT_HIDDEN_BOOL(0, "ignore-date", &options.ignore_date,
N_("synonym of --reset-author-date")),
OPT_PASSTHRU_ARGV('C', NULL, &options.git_am_opts, N_("n"),
N_("passed to 'git apply'"), 0),
OPT_BOOL(0, "ignore-whitespace", &ignore_whitespace,
N_("ignore changes in whitespace")),
OPT_PASSTHRU_ARGV(0, "whitespace", &options.git_am_opts,
N_("action"), N_("passed to 'git apply'"), 0),
OPT_BIT('f', "force-rebase", &options.flags,
N_("cherry-pick all commits, even if unchanged"),
REBASE_FORCE),
OPT_BIT(0, "no-ff", &options.flags,
N_("cherry-pick all commits, even if unchanged"),
REBASE_FORCE),
OPT_CMDMODE(0, "continue", &action, N_("continue"),
ACTION_CONTINUE),
OPT_CMDMODE(0, "skip", &action,
N_("skip current patch and continue"), ACTION_SKIP),
OPT_CMDMODE(0, "abort", &action,
N_("abort and check out the original branch"),
ACTION_ABORT),
OPT_CMDMODE(0, "quit", &action,
N_("abort but keep HEAD where it is"), ACTION_QUIT),
OPT_CMDMODE(0, "edit-todo", &action, N_("edit the todo list "
"during an interactive rebase"), ACTION_EDIT_TODO),
OPT_CMDMODE(0, "show-current-patch", &action,
N_("show the patch file being applied or merged"),
ACTION_SHOW_CURRENT_PATCH),
OPT_CALLBACK_F(0, "apply", &options, NULL,
N_("use apply strategies to rebase"),
PARSE_OPT_NOARG | PARSE_OPT_NONEG,
parse_opt_am),
OPT_CALLBACK_F('m', "merge", &options, NULL,
N_("use merging strategies to rebase"),
PARSE_OPT_NOARG | PARSE_OPT_NONEG,
parse_opt_merge),
OPT_CALLBACK_F('i', "interactive", &options, NULL,
N_("let the user edit the list of commits to rebase"),
PARSE_OPT_NOARG | PARSE_OPT_NONEG,
parse_opt_interactive),
OPT_SET_INT_F('p', "preserve-merges", &options.type,
N_("(DEPRECATED) try to recreate merges instead of "
"ignoring them"),
REBASE_PRESERVE_MERGES, PARSE_OPT_HIDDEN),
OPT_RERERE_AUTOUPDATE(&options.allow_rerere_autoupdate),
OPT_CALLBACK_F(0, "empty", &options, "{drop,keep,ask}",
N_("how to handle commits that become empty"),
PARSE_OPT_NONEG, parse_opt_empty),
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(0, "autosquash", &options.autosquash,
N_("move commits that begin with "
"squash!/fixup! under -i")),
{ OPTION_STRING, 'S', "gpg-sign", &gpg_sign, N_("key-id"),
N_("GPG-sign commits"),
PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
OPT_AUTOSTASH(&options.autostash),
OPT_STRING_LIST('x', "exec", &exec, N_("exec"),
N_("add exec lines after each commit of the "
"editable list")),
OPT_BOOL_F(0, "allow-empty-message",
&options.allow_empty_message,
N_("allow rebasing commits with empty messages"),
PARSE_OPT_HIDDEN),
{OPTION_STRING, 'r', "rebase-merges", &rebase_merges,
N_("mode"),
N_("try to rebase merges instead of skipping them"),
PARSE_OPT_OPTARG, NULL, (intptr_t)""},
OPT_BOOL(0, "fork-point", &fork_point,
N_("use 'merge-base --fork-point' to refine upstream")),
OPT_STRING('s', "strategy", &options.strategy,
N_("strategy"), N_("use the given merge strategy")),
OPT_STRING_LIST('X', "strategy-option", &strategy_options,
N_("option"),
N_("pass the argument through to the merge "
"strategy")),
OPT_BOOL(0, "root", &options.root,
N_("rebase all reachable commits up to the root(s)")),
OPT_BOOL(0, "reschedule-failed-exec",
&reschedule_failed_exec,
N_("automatically re-schedule any `exec` that fails")),
OPT_BOOL(0, "reapply-cherry-picks", &options.reapply_cherry_picks,
N_("apply all changes, even those already present upstream")),
OPT_END(),
};
int i;
if (argc == 2 && !strcmp(argv[1], "-h"))
usage_with_options(builtin_rebase_usage,
builtin_rebase_options);
options.allow_empty_message = 1;
git_config(rebase_config, &options);
/* options.gpg_sign_opt will be either "-S" or NULL */
gpg_sign = options.gpg_sign_opt ? "" : NULL;
FREE_AND_NULL(options.gpg_sign_opt);
if (options.use_legacy_rebase ||
!git_env_bool("GIT_TEST_REBASE_USE_BUILTIN", -1))
warning(_("the rebase.useBuiltin support has been removed!\n"
"See its entry in 'git help config' for details."));
strbuf_reset(&buf);
strbuf_addf(&buf, "%s/applying", apply_dir());
if(file_exists(buf.buf))
die(_("It looks like 'git am' is in progress. Cannot rebase."));
if (is_directory(apply_dir())) {
options.type = REBASE_APPLY;
options.state_dir = apply_dir();
} else if (is_directory(merge_dir())) {
strbuf_reset(&buf);
strbuf_addf(&buf, "%s/rewritten", merge_dir());
if (is_directory(buf.buf)) {
options.type = REBASE_PRESERVE_MERGES;
options.flags |= REBASE_INTERACTIVE_EXPLICIT;
} else {
strbuf_reset(&buf);
strbuf_addf(&buf, "%s/interactive", merge_dir());
if(file_exists(buf.buf)) {
options.type = REBASE_MERGE;
options.flags |= REBASE_INTERACTIVE_EXPLICIT;
} else
options.type = REBASE_MERGE;
}
options.state_dir = merge_dir();
}
if (options.type != REBASE_UNSPECIFIED)
in_progress = 1;
total_argc = argc;
argc = parse_options(argc, argv, prefix,
builtin_rebase_options,
builtin_rebase_usage, 0);
if (action != ACTION_NONE && total_argc != 2) {
usage_with_options(builtin_rebase_usage,
builtin_rebase_options);
}
if (argc > 2)
usage_with_options(builtin_rebase_usage,
builtin_rebase_options);
if (options.type == REBASE_PRESERVE_MERGES)
warning(_("git rebase --preserve-merges is deprecated. "
"Use --rebase-merges instead."));
if (keep_base) {
if (options.onto_name)
die(_("cannot combine '--keep-base' with '--onto'"));
if (options.root)
die(_("cannot combine '--keep-base' with '--root'"));
}
if (options.root && fork_point > 0)
die(_("cannot combine '--root' with '--fork-point'"));
if (action != ACTION_NONE && !in_progress)
die(_("No rebase in progress?"));
setenv(GIT_REFLOG_ACTION_ENVIRONMENT, "rebase", 0);
if (action == ACTION_EDIT_TODO && !is_merge(&options))
die(_("The --edit-todo action can only be used during "
"interactive rebase."));
if (trace2_is_enabled()) {
if (is_merge(&options))
trace2_cmd_mode("interactive");
else if (exec.nr)
trace2_cmd_mode("interactive-exec");
else
trace2_cmd_mode(action_names[action]);
}
switch (action) {
case ACTION_CONTINUE: {
struct object_id head;
struct lock_file lock_file = LOCK_INIT;
int fd;
options.action = "continue";
set_reflog_action(&options);
/* Sanity check */
if (get_oid("HEAD", &head))
die(_("Cannot read HEAD"));
fd = hold_locked_index(&lock_file, 0);
if (repo_read_index(the_repository) < 0)
die(_("could not read index"));
refresh_index(the_repository->index, REFRESH_QUIET, NULL, NULL,
NULL);
if (0 <= fd)
repo_update_index_if_able(the_repository, &lock_file);
rollback_lock_file(&lock_file);
if (has_unstaged_changes(the_repository, 1)) {
puts(_("You must edit all merge conflicts and then\n"
"mark them as resolved using git add"));
exit(1);
}
if (read_basic_state(&options))
exit(1);
goto run_rebase;
}
case ACTION_SKIP: {
struct string_list merge_rr = STRING_LIST_INIT_DUP;
options.action = "skip";
set_reflog_action(&options);
rerere_clear(the_repository, &merge_rr);
string_list_clear(&merge_rr, 1);
if (reset_head(the_repository, NULL, "reset", NULL, RESET_HEAD_HARD,
NULL, NULL, DEFAULT_REFLOG_ACTION) < 0)
die(_("could not discard worktree changes"));
remove_branch_state(the_repository, 0);
if (read_basic_state(&options))
exit(1);
goto run_rebase;
}
case ACTION_ABORT: {
struct string_list merge_rr = STRING_LIST_INIT_DUP;
options.action = "abort";
set_reflog_action(&options);
rerere_clear(the_repository, &merge_rr);
string_list_clear(&merge_rr, 1);
if (read_basic_state(&options))
exit(1);
if (reset_head(the_repository, &options.orig_head, "reset",
options.head_name, RESET_HEAD_HARD,
NULL, NULL, DEFAULT_REFLOG_ACTION) < 0)
die(_("could not move back to %s"),
oid_to_hex(&options.orig_head));
remove_branch_state(the_repository, 0);
ret = !!finish_rebase(&options);
goto cleanup;
}
case ACTION_QUIT: {
save_autostash(state_dir_path("autostash", &options));
if (options.type == REBASE_MERGE) {
struct replay_opts replay = REPLAY_OPTS_INIT;
replay.action = REPLAY_INTERACTIVE_REBASE;
ret = !!sequencer_remove_state(&replay);
} else {
strbuf_reset(&buf);
strbuf_addstr(&buf, options.state_dir);
ret = !!remove_dir_recursively(&buf, 0);
if (ret)
error(_("could not remove '%s'"),
options.state_dir);
}
goto cleanup;
}
case ACTION_EDIT_TODO:
options.action = "edit-todo";
options.dont_finish_rebase = 1;
goto run_rebase;
case ACTION_SHOW_CURRENT_PATCH:
options.action = "show-current-patch";
options.dont_finish_rebase = 1;
goto run_rebase;
case ACTION_NONE:
break;
default:
BUG("action: %d", action);
}
/* Make sure no rebase is in progress */
if (in_progress) {
const char *last_slash = strrchr(options.state_dir, '/');
const char *state_dir_base =
last_slash ? last_slash + 1 : options.state_dir;
const char *cmd_live_rebase =
"git rebase (--continue | --abort | --skip)";
strbuf_reset(&buf);
strbuf_addf(&buf, "rm -fr \"%s\"", options.state_dir);
die(_("It seems that there is already a %s directory, and\n"
"I wonder if you are in the middle of another rebase. "
"If that is the\n"
"case, please try\n\t%s\n"
"If that is not the case, please\n\t%s\n"
"and run me again. I am stopping in case you still "
"have something\n"
"valuable there.\n"),
state_dir_base, cmd_live_rebase, buf.buf);
}
if ((options.flags & REBASE_INTERACTIVE_EXPLICIT) ||
(action != ACTION_NONE) ||
(exec.nr > 0) ||
options.autosquash) {
allow_preemptive_ff = 0;
}
if (options.committer_date_is_author_date || options.ignore_date)
options.flags |= REBASE_FORCE;
for (i = 0; i < options.git_am_opts.nr; i++) {
const char *option = options.git_am_opts.v[i], *p;
if (!strcmp(option, "--whitespace=fix") ||
!strcmp(option, "--whitespace=strip"))
allow_preemptive_ff = 0;
else if (skip_prefix(option, "-C", &p)) {
while (*p)
if (!isdigit(*(p++)))
die(_("switch `C' expects a "
"numerical value"));
} else if (skip_prefix(option, "--whitespace=", &p)) {
if (*p && strcmp(p, "warn") && strcmp(p, "nowarn") &&
strcmp(p, "error") && strcmp(p, "error-all"))
die("Invalid whitespace option: '%s'", p);
}
}
for (i = 0; i < exec.nr; i++)
if (check_exec_cmd(exec.items[i].string))
exit(1);
if (!(options.flags & REBASE_NO_QUIET))
strvec_push(&options.git_am_opts, "-q");
if (options.empty != EMPTY_UNSPECIFIED)
imply_merge(&options, "--empty");
if (options.reapply_cherry_picks)
imply_merge(&options, "--reapply-cherry-picks");
if (gpg_sign)
options.gpg_sign_opt = xstrfmt("-S%s", gpg_sign);
if (exec.nr) {
int i;
imply_merge(&options, "--exec");
strbuf_reset(&buf);
for (i = 0; i < exec.nr; i++)
strbuf_addf(&buf, "exec %s\n", exec.items[i].string);
options.cmd = xstrdup(buf.buf);
}
if (rebase_merges) {
if (!*rebase_merges)
; /* default mode; do nothing */
else if (!strcmp("rebase-cousins", rebase_merges))
options.rebase_cousins = 1;
else if (strcmp("no-rebase-cousins", rebase_merges))
die(_("Unknown mode: %s"), rebase_merges);
options.rebase_merges = 1;
imply_merge(&options, "--rebase-merges");
}
if (options.type == REBASE_APPLY) {
if (ignore_whitespace)
strvec_push(&options.git_am_opts,
"--ignore-whitespace");
if (options.committer_date_is_author_date)
strvec_push(&options.git_am_opts,
"--committer-date-is-author-date");
if (options.ignore_date)
strvec_push(&options.git_am_opts, "--ignore-date");
} else {
/* REBASE_MERGE and PRESERVE_MERGES */
if (ignore_whitespace) {
string_list_append(&strategy_options,
"ignore-space-change");
}
}
if (strategy_options.nr) {
int i;
if (!options.strategy)
options.strategy = "recursive";
strbuf_reset(&buf);
for (i = 0; i < strategy_options.nr; i++)
strbuf_addf(&buf, " --%s",
strategy_options.items[i].string);
options.strategy_opts = xstrdup(buf.buf);
}
if (options.strategy) {
options.strategy = xstrdup(options.strategy);
switch (options.type) {
case REBASE_APPLY:
die(_("--strategy requires --merge or --interactive"));
case REBASE_MERGE:
case REBASE_PRESERVE_MERGES:
/* compatible */
break;
case REBASE_UNSPECIFIED:
options.type = REBASE_MERGE;
break;
default:
BUG("unhandled rebase type (%d)", options.type);
}
}
if (options.type == REBASE_MERGE)
imply_merge(&options, "--merge");
if (options.root && !options.onto_name)
imply_merge(&options, "--root without --onto");
if (isatty(2) && options.flags & REBASE_NO_QUIET)
strbuf_addstr(&options.git_format_patch_opt, " --progress");
if (options.git_am_opts.nr || options.type == REBASE_APPLY) {
/* all am options except -q are compatible only with --apply */
for (i = options.git_am_opts.nr - 1; i >= 0; i--)
if (strcmp(options.git_am_opts.v[i], "-q"))
break;
if (i >= 0) {
if (is_merge(&options))
die(_("cannot combine apply options with "
"merge options"));
else
options.type = REBASE_APPLY;
}
}
if (options.type == REBASE_UNSPECIFIED) {
if (!strcmp(options.default_backend, "merge"))
imply_merge(&options, "--merge");
else if (!strcmp(options.default_backend, "apply"))
options.type = REBASE_APPLY;
else
die(_("Unknown rebase backend: %s"),
options.default_backend);
}
switch (options.type) {
case REBASE_MERGE:
case REBASE_PRESERVE_MERGES:
options.state_dir = merge_dir();
break;
case REBASE_APPLY:
options.state_dir = apply_dir();
break;
default:
BUG("options.type was just set above; should be unreachable.");
}
if (options.empty == EMPTY_UNSPECIFIED) {
if (options.flags & REBASE_INTERACTIVE_EXPLICIT)
options.empty = EMPTY_ASK;
else if (exec.nr > 0)
options.empty = EMPTY_KEEP;
else
options.empty = EMPTY_DROP;
}
if (reschedule_failed_exec > 0 && !is_merge(&options))
die(_("--reschedule-failed-exec requires "
"--exec or --interactive"));
if (reschedule_failed_exec >= 0)
options.reschedule_failed_exec = reschedule_failed_exec;
if (options.signoff) {
if (options.type == REBASE_PRESERVE_MERGES)
die("cannot combine '--signoff' with "
"'--preserve-merges'");
strvec_push(&options.git_am_opts, "--signoff");
options.flags |= REBASE_FORCE;
}
if (options.type == REBASE_PRESERVE_MERGES) {
/*
* Note: incompatibility with --signoff handled in signoff block above
* Note: incompatibility with --interactive is just a strong warning;
* git-rebase.txt caveats with "unless you know what you are doing"
*/
if (options.rebase_merges)
die(_("cannot combine '--preserve-merges' with "
"'--rebase-merges'"));
if (options.reschedule_failed_exec)
die(_("error: cannot combine '--preserve-merges' with "
"'--reschedule-failed-exec'"));
}
if (!options.root) {
if (argc < 1) {
struct branch *branch;
branch = branch_get(NULL);
options.upstream_name = branch_get_upstream(branch,
NULL);
if (!options.upstream_name)
error_on_missing_default_upstream();
if (fork_point < 0)
fork_point = 1;
} else {
options.upstream_name = argv[0];
argc--;
argv++;
if (!strcmp(options.upstream_name, "-"))
options.upstream_name = "@{-1}";
}
options.upstream = peel_committish(options.upstream_name);
if (!options.upstream)
die(_("invalid upstream '%s'"), options.upstream_name);
options.upstream_arg = options.upstream_name;
} else {
if (!options.onto_name) {
if (commit_tree("", 0, the_hash_algo->empty_tree, NULL,
&squash_onto, NULL, NULL) < 0)
die(_("Could not create new root commit"));
options.squash_onto = &squash_onto;
options.onto_name = squash_onto_name =
xstrdup(oid_to_hex(&squash_onto));
} else
options.root_with_onto = 1;
options.upstream_name = NULL;
options.upstream = NULL;
if (argc > 1)
usage_with_options(builtin_rebase_usage,
builtin_rebase_options);
options.upstream_arg = "--root";
}
/* Make sure the branch to rebase onto is valid. */
if (keep_base) {
strbuf_reset(&buf);
strbuf_addstr(&buf, options.upstream_name);
strbuf_addstr(&buf, "...");
options.onto_name = xstrdup(buf.buf);
} else if (!options.onto_name)
options.onto_name = options.upstream_name;
if (strstr(options.onto_name, "...")) {
if (get_oid_mb(options.onto_name, &merge_base) < 0) {
if (keep_base)
die(_("'%s': need exactly one merge base with branch"),
options.upstream_name);
else
die(_("'%s': need exactly one merge base"),
options.onto_name);
}
options.onto = lookup_commit_or_die(&merge_base,
options.onto_name);
} else {
options.onto = peel_committish(options.onto_name);
if (!options.onto)
die(_("Does not point to a valid commit '%s'"),
options.onto_name);
}
/*
* If the branch to rebase is given, that is the branch we will rebase
* branch_name -- branch/commit being rebased, or
* HEAD (already detached)
* orig_head -- commit object name of tip of the branch before rebasing
* head_name -- refs/heads/<that-branch> or NULL (detached HEAD)
*/
if (argc == 1) {
/* Is it "rebase other branchname" or "rebase other commit"? */
branch_name = argv[0];
options.switch_to = argv[0];
/* Is it a local branch? */
strbuf_reset(&buf);
strbuf_addf(&buf, "refs/heads/%s", branch_name);
if (!read_ref(buf.buf, &options.orig_head)) {
die_if_checked_out(buf.buf, 1);
options.head_name = xstrdup(buf.buf);
/* If not is it a valid ref (branch or commit)? */
} else if (!get_oid(branch_name, &options.orig_head))
options.head_name = NULL;
else
die(_("fatal: no such branch/commit '%s'"),
branch_name);
} else if (argc == 0) {
/* Do not need to switch branches, we are already on it. */
options.head_name =
xstrdup_or_null(resolve_ref_unsafe("HEAD", 0, NULL,
&flags));
if (!options.head_name)
die(_("No such ref: %s"), "HEAD");
if (flags & REF_ISSYMREF) {
if (!skip_prefix(options.head_name,
"refs/heads/", &branch_name))
branch_name = options.head_name;
} else {
FREE_AND_NULL(options.head_name);
branch_name = "HEAD";
}
if (get_oid("HEAD", &options.orig_head))
die(_("Could not resolve HEAD to a revision"));
} else
BUG("unexpected number of arguments left to parse");
if (fork_point > 0) {
struct commit *head =
lookup_commit_reference(the_repository,
&options.orig_head);
options.restrict_revision =
get_fork_point(options.upstream_name, head);
}
if (repo_read_index(the_repository) < 0)
die(_("could not read index"));
if (options.autostash) {
create_autostash(the_repository, state_dir_path("autostash", &options),
DEFAULT_REFLOG_ACTION);
}
if (require_clean_work_tree(the_repository, "rebase",
_("Please commit or stash them."), 1, 1)) {
ret = 1;
goto cleanup;
}
/*
* Now we are rebasing commits upstream..orig_head (or with --root,
* everything leading up to orig_head) on top of onto.
*/
/*
* Check if we are already based on onto with linear history,
* in which case we could fast-forward without replacing the commits
* with new commits recreated by replaying their changes.
*
* Note that can_fast_forward() initializes merge_base, so we have to
* call it before checking allow_preemptive_ff.
*/
if (can_fast_forward(options.onto, options.upstream, options.restrict_revision,
&options.orig_head, &merge_base) &&
allow_preemptive_ff) {
int flag;
if (!(options.flags & REBASE_FORCE)) {
/* Lazily switch to the target branch if needed... */
if (options.switch_to) {
strbuf_reset(&buf);
strbuf_addf(&buf, "%s: checkout %s",
getenv(GIT_REFLOG_ACTION_ENVIRONMENT),
options.switch_to);
if (reset_head(the_repository,
&options.orig_head, "checkout",
options.head_name,
RESET_HEAD_RUN_POST_CHECKOUT_HOOK,
NULL, buf.buf,
DEFAULT_REFLOG_ACTION) < 0) {
ret = !!error(_("could not switch to "
"%s"),
options.switch_to);
goto cleanup;
}
}
if (!(options.flags & REBASE_NO_QUIET))
; /* be quiet */
else if (!strcmp(branch_name, "HEAD") &&
resolve_ref_unsafe("HEAD", 0, NULL, &flag))
puts(_("HEAD is up to date."));
else
printf(_("Current branch %s is up to date.\n"),
branch_name);
ret = !!finish_rebase(&options);
goto cleanup;
} else if (!(options.flags & REBASE_NO_QUIET))
; /* be quiet */
else if (!strcmp(branch_name, "HEAD") &&
resolve_ref_unsafe("HEAD", 0, NULL, &flag))
puts(_("HEAD is up to date, rebase forced."));
else
printf(_("Current branch %s is up to date, rebase "
"forced.\n"), branch_name);
}
/* If a hook exists, give it a chance to interrupt*/
if (!ok_to_skip_pre_rebase &&
run_hook_le(NULL, "pre-rebase", options.upstream_arg,
argc ? argv[0] : NULL, NULL))
die(_("The pre-rebase hook refused to rebase."));
if (options.flags & REBASE_DIFFSTAT) {
struct diff_options opts;
if (options.flags & REBASE_VERBOSE) {
if (is_null_oid(&merge_base))
printf(_("Changes to %s:\n"),
oid_to_hex(&options.onto->object.oid));
else
printf(_("Changes from %s to %s:\n"),
oid_to_hex(&merge_base),
oid_to_hex(&options.onto->object.oid));
}
/* We want color (if set), but no pager */
diff_setup(&opts);
opts.stat_width = -1; /* use full terminal width */
opts.stat_graph_width = -1; /* respect statGraphWidth config */
opts.output_format |=
DIFF_FORMAT_SUMMARY | DIFF_FORMAT_DIFFSTAT;
opts.detect_rename = DIFF_DETECT_RENAME;
diff_setup_done(&opts);
diff_tree_oid(is_null_oid(&merge_base) ?
the_hash_algo->empty_tree : &merge_base,
&options.onto->object.oid, "", &opts);
diffcore_std(&opts);
diff_flush(&opts);
}
if (is_merge(&options))
goto run_rebase;
/* Detach HEAD and reset the tree */
if (options.flags & REBASE_NO_QUIET)
printf(_("First, rewinding head to replay your work on top of "
"it...\n"));
strbuf_addf(&msg, "%s: checkout %s",
getenv(GIT_REFLOG_ACTION_ENVIRONMENT), options.onto_name);
if (reset_head(the_repository, &options.onto->object.oid, "checkout", NULL,
RESET_HEAD_DETACH | RESET_ORIG_HEAD |
RESET_HEAD_RUN_POST_CHECKOUT_HOOK,
NULL, msg.buf, DEFAULT_REFLOG_ACTION))
die(_("Could not detach HEAD"));
strbuf_release(&msg);
/*
* If the onto is a proper descendant of the tip of the branch, then
* we just fast-forwarded.
*/
strbuf_reset(&msg);
if (oideq(&merge_base, &options.orig_head)) {
printf(_("Fast-forwarded %s to %s.\n"),
branch_name, options.onto_name);
strbuf_addf(&msg, "rebase finished: %s onto %s",
options.head_name ? options.head_name : "detached HEAD",
oid_to_hex(&options.onto->object.oid));
reset_head(the_repository, NULL, "Fast-forwarded", options.head_name,
RESET_HEAD_REFS_ONLY, "HEAD", msg.buf,
DEFAULT_REFLOG_ACTION);
strbuf_release(&msg);
ret = !!finish_rebase(&options);
goto cleanup;
}
strbuf_addf(&revisions, "%s..%s",
options.root ? oid_to_hex(&options.onto->object.oid) :
(options.restrict_revision ?
oid_to_hex(&options.restrict_revision->object.oid) :
oid_to_hex(&options.upstream->object.oid)),
oid_to_hex(&options.orig_head));
options.revisions = revisions.buf;
run_rebase:
ret = !!run_specific_rebase(&options, action);
cleanup:
strbuf_release(&buf);
strbuf_release(&revisions);
free(options.head_name);
free(options.gpg_sign_opt);
free(options.cmd);
free(squash_onto_name);
return ret;
}
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