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rebase.c
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1904 lines (1659 loc) · 55.8 KB
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/*
* "git rebase" builtin command
*
* Copyright (c) 2018 Pratik Karki
*/
#define USE_THE_REPOSITORY_VARIABLE
#define DISABLE_SIGN_COMPARE_WARNINGS
#include "builtin.h"
#include "abspath.h"
#include "environment.h"
#include "gettext.h"
#include "hex.h"
#include "run-command.h"
#include "strvec.h"
#include "dir.h"
#include "refs.h"
#include "config.h"
#include "unpack-trees.h"
#include "lockfile.h"
#include "object-file.h"
#include "object-name.h"
#include "parse-options.h"
#include "path.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"
#include "trace2.h"
#include "hook.h"
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>]"),
"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
};
enum empty_type {
EMPTY_UNSPECIFIED = -1,
EMPTY_DROP,
EMPTY_KEEP,
EMPTY_STOP
};
enum action {
ACTION_NONE = 0,
ACTION_CONTINUE,
ACTION_SKIP,
ACTION_ABORT,
ACTION_QUIT,
ACTION_EDIT_TODO,
ACTION_SHOW_CURRENT_PATCH
};
static const char *action_names[] = {
"undefined",
"continue",
"skip",
"abort",
"quit",
"edit_todo",
"show_current_patch"
};
struct rebase_options {
enum rebase_type type;
enum empty_type empty;
char *default_backend;
const char *state_dir;
struct commit *upstream;
const char *upstream_name;
const char *upstream_arg;
char *head_name;
struct commit *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;
enum action action;
char *reflog_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;
struct string_list exec;
int allow_empty_message;
int rebase_merges, rebase_cousins;
char *strategy;
struct string_list strategy_opts;
struct strbuf git_format_patch_opt;
int reschedule_failed_exec;
int reapply_cherry_picks;
int fork_point;
int update_refs;
int config_autosquash;
int config_rebase_merges;
int config_update_refs;
};
#define REBASE_OPTIONS_INIT { \
.type = REBASE_UNSPECIFIED, \
.empty = EMPTY_UNSPECIFIED, \
.keep_empty = 1, \
.default_backend = xstrdup("merge"), \
.flags = REBASE_NO_QUIET, \
.git_am_opts = STRVEC_INIT, \
.exec = STRING_LIST_INIT_NODUP, \
.git_format_patch_opt = STRBUF_INIT, \
.fork_point = -1, \
.reapply_cherry_picks = -1, \
.allow_empty_message = 1, \
.autosquash = -1, \
.rebase_merges = -1, \
.config_rebase_merges = -1, \
.update_refs = -1, \
.config_update_refs = -1, \
.strategy_opts = STRING_LIST_INIT_NODUP,\
}
static void rebase_options_release(struct rebase_options *opts)
{
free(opts->default_backend);
free(opts->reflog_action);
free(opts->head_name);
strvec_clear(&opts->git_am_opts);
free(opts->gpg_sign_opt);
string_list_clear(&opts->exec, 0);
free(opts->strategy);
string_list_clear(&opts->strategy_opts, 0);
strbuf_release(&opts->git_format_patch_opt);
}
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;
free(replay.gpg_sign);
replay.gpg_sign = xstrdup_or_null(opts->gpg_sign_opt);
replay.reflog_action = xstrdup(opts->reflog_action);
if (opts->strategy)
replay.strategy = xstrdup_or_null(opts->strategy);
else if (!replay.strategy && replay.default_strategy) {
replay.strategy = replay.default_strategy;
replay.default_strategy = NULL;
}
for (size_t i = 0; i < opts->strategy_opts.nr; i++)
strvec_push(&replay.xopts, opts->strategy_opts.items[i].string);
if (opts->squash_onto) {
oidcpy(&replay.squash_onto, opts->squash_onto);
replay.have_squash_onto = 1;
}
return replay;
}
static int edit_todo_file(unsigned flags, struct replay_opts *opts)
{
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, comment_line_str);
res = edit_todo_list(the_repository, opts, &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 = repo_find_unique_abbrev(the_repository, orig_head,
DEFAULT_ABBREV);
if (upstream) {
const char *shortrev;
shortrev = repo_find_unique_abbrev(the_repository,
&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()) &&
safe_create_dir_in_gitdir(the_repository, merge_dir()))
return error_errno(_("could not create temporary %s"), merge_dir());
refs_delete_reflog(get_main_ref_store(the_repository), "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 int do_interactive_rebase(struct rebase_options *opts, unsigned flags)
{
int ret = -1;
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);
if (get_revision_ranges(opts->upstream, opts->onto, &opts->orig_head->object.oid,
&revisions, &shortrevisions))
goto cleanup;
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, flags);
if (ret) {
error(_("could not generate todo list"));
goto cleanup;
}
if (init_basic_state(&replay,
opts->head_name ? opts->head_name : "detached HEAD",
opts->onto, &opts->orig_head->object.oid))
goto cleanup;
if (!opts->upstream && opts->squash_onto)
write_file(path_squash_onto(), "%s\n",
oid_to_hex(opts->squash_onto));
discard_index(the_repository->index);
if (todo_list_parse_insn_buffer(the_repository, &replay,
todo_list.buf.buf, &todo_list))
BUG("unusable todo list");
ret = complete_action(the_repository, &replay, flags,
shortrevisions, opts->onto_name, opts->onto,
&opts->orig_head->object.oid, &opts->exec,
opts->autosquash, opts->update_refs, &todo_list);
cleanup:
replay_opts_release(&replay);
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)
{
unsigned flags = 0;
int abbreviate_commands = 0, ret = 0;
repo_config_get_bool(the_repository, "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 |= opts->reapply_cherry_picks ? TODO_LIST_REAPPLY_CHERRY_PICKS : 0;
flags |= opts->flags & REBASE_NO_QUIET ? TODO_LIST_WARN_SKIPPED_CHERRY_PICKS : 0;
switch (opts->action) {
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);
replay_opts_release(&replay_opts);
break;
}
case ACTION_EDIT_TODO: {
struct replay_opts replay_opts = get_replay_opts(opts);
ret = edit_todo_file(flags, &replay_opts);
replay_opts_release(&replay_opts);
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;
}
default:
BUG("invalid command '%d'", opts->action);
}
return ret;
}
static int is_merge(struct rebase_options *opts)
{
return opts->type == REBASE_MERGE;
}
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:
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_hex(buf.buf, &oid) ||
!(opts->onto = lookup_commit_object(the_repository, &oid)))
return error(_("invalid onto: '%s'"), 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_hex(buf.buf, &oid) ||
!(opts->orig_head = lookup_commit_object(the_repository, &oid)))
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);
}
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->object.oid));
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->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 cleanup_autostash(struct rebase_options *opts)
{
int ret;
struct strbuf dir = STRBUF_INIT;
const char *path = state_dir_path("autostash", opts);
if (!file_exists(path))
return 0;
ret = apply_autostash(path);
strbuf_addstr(&dir, opts->state_dir);
if (remove_dir_recursively(&dir, 0))
ret = error_errno(_("could not remove '%s'"), opts->state_dir);
strbuf_release(&dir);
return ret;
}
static int finish_rebase(struct rebase_options *opts)
{
struct strbuf dir = STRBUF_INIT;
int ret = 0;
refs_delete_ref(get_main_ref_store(the_repository), NULL,
"REBASE_HEAD", NULL, REF_NO_DEREF);
refs_delete_ref(get_main_ref_store(the_repository), NULL,
"AUTO_MERGE", NULL, REF_NO_DEREF);
apply_autostash(state_dir_path("autostash", opts));
/*
* 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);
replay_opts_release(&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 int move_to_original_branch(struct rebase_options *opts)
{
struct strbuf branch_reflog = STRBUF_INIT, head_reflog = STRBUF_INIT;
struct reset_head_opts ropts = { 0 };
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(&branch_reflog, "%s (finish): %s onto %s",
opts->reflog_action,
opts->head_name, oid_to_hex(&opts->onto->object.oid));
strbuf_addf(&head_reflog, "%s (finish): returning to %s",
opts->reflog_action, opts->head_name);
ropts.branch = opts->head_name;
ropts.flags = RESET_HEAD_REFS_ONLY;
ropts.branch_msg = branch_reflog.buf;
ropts.head_msg = head_reflog.buf;
ret = reset_head(the_repository, &ropts);
strbuf_release(&branch_reflog);
strbuf_release(&head_reflog);
return ret;
}
static int run_am(struct rebase_options *opts)
{
struct child_process am = CHILD_PROCESS_INIT;
struct child_process format_patch = CHILD_PROCESS_INIT;
int status;
char *rebased_patches;
am.git_cmd = 1;
strvec_push(&am.args, "am");
strvec_pushf(&am.env, GIT_REFLOG_ACTION_ENVIRONMENT "=%s (pick)",
opts->reflog_action);
if (opts->action == ACTION_CONTINUE) {
strvec_push(&am.args, "--resolved");
strvec_pushf(&am.args, "--resolvemsg=%s", rebase_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 == ACTION_SKIP) {
strvec_push(&am.args, "--skip");
strvec_pushf(&am.args, "--resolvemsg=%s", rebase_resolvemsg);
status = run_command(&am);
if (status)
return status;
return move_to_original_branch(opts);
}
if (opts->action == ACTION_SHOW_CURRENT_PATCH) {
strvec_push(&am.args, "--show-current-patch");
return run_command(&am);
}
rebased_patches = repo_git_path(the_repository, "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);
child_process_clear(&am);
return status;
}
format_patch.git_cmd = 1;
strvec_pushl(&format_patch.args, "format-patch", "-k", "--stdout",
"--full-index", "--cherry-pick", "--right-only",
"--default-prefix", "--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_pushf(&format_patch.args, "%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->object.oid));
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) {
struct reset_head_opts ropts = { 0 };
unlink(rebased_patches);
free(rebased_patches);
child_process_clear(&am);
ropts.oid = &opts->orig_head->object.oid;
ropts.branch = opts->head_name;
ropts.default_reflog_action = opts->reflog_action;
reset_head(the_repository, &ropts);
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);
return status;
}
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);
child_process_clear(&am);
return status;
}
strvec_pushv(&am.args, opts->git_am_opts.v);
strvec_push(&am.args, "--rebasing");
strvec_pushf(&am.args, "--resolvemsg=%s", rebase_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)
{
int status;
if (opts->type == REBASE_MERGE) {
/* Run sequencer-based rebase */
if (!(opts->flags & REBASE_INTERACTIVE_EXPLICIT))
setenv("GIT_SEQUENCE_EDITOR", ":", 1);
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);
} else if (opts->type == REBASE_APPLY)
status = run_am(opts);
else
BUG("Unhandled rebase type %d", opts->type);
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");
}
return status ? -1 : 0;
}
static void parse_rebase_merges_value(struct rebase_options *options, const char *value)
{
if (!strcmp("no-rebase-cousins", value))
options->rebase_cousins = 0;
else if (!strcmp("rebase-cousins", value))
options->rebase_cousins = 1;
else
die(_("Unknown rebase-merges mode: %s"), value);
}
static int rebase_config(const char *var, const char *value,
const struct config_context *ctx, 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->config_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.rebasemerges")) {
opts->config_rebase_merges = git_parse_maybe_bool(value);
if (opts->config_rebase_merges < 0) {
opts->config_rebase_merges = 1;
parse_rebase_merges_value(opts, value);
} else {
opts->rebase_cousins = 0;
}
return 0;
}
if (!strcmp(var, "rebase.updaterefs")) {
opts->config_update_refs = 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.forkpoint")) {
opts->fork_point = git_config_bool(var, value) ? -1 : 0;
return 0;
}
if (!strcmp(var, "rebase.backend")) {
FREE_AND_NULL(opts->default_backend);
return git_config_string(&opts->default_backend, var, value);
}
return git_default_config(var, value, ctx, data);
}
static int checkout_up_to_date(struct rebase_options *options)
{
struct strbuf buf = STRBUF_INIT;
struct reset_head_opts ropts = { 0 };
int ret = 0;
strbuf_addf(&buf, "%s: checkout %s",
options->reflog_action, options->switch_to);
ropts.oid = &options->orig_head->object.oid;
ropts.branch = options->head_name;
ropts.flags = RESET_HEAD_RUN_POST_CHECKOUT_HOOK;
if (!ropts.branch)
ropts.flags |= RESET_HEAD_DETACH;
ropts.head_msg = buf.buf;
if (reset_head(the_repository, &ropts) < 0)
ret = error(_("could not switch to %s"), options->switch_to);
strbuf_release(&buf);
return ret;
}
/*
* 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) {
repo_parse_commit(the_repository, 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 commit *head, struct object_id *branch_base)
{
struct commit_list *merge_bases = NULL;
int res = 0;
if (is_null_oid(branch_base))
goto done; /* fill_branch_base() found multiple merge bases */
if (!oideq(branch_base, &onto->object.oid))
goto done;
if (restrict_revision && !oideq(&restrict_revision->object.oid, branch_base))
goto done;
if (!upstream)
goto done;
if (repo_get_merge_bases(the_repository, upstream, head, &merge_bases) < 0)
exit(128);
if (!merge_bases || merge_bases->next)
goto done;
if (!oideq(&onto->object.oid, &merge_bases->item->object.oid))
goto done;
res = 1;
done:
commit_list_free(merge_bases);
return res && is_linear_history(onto, head);
}
static void fill_branch_base(struct rebase_options *options,
struct object_id *branch_base)
{
struct commit_list *merge_bases = NULL;
if (repo_get_merge_bases(the_repository, options->onto,
options->orig_head, &merge_bases) < 0)
exit(128);
if (!merge_bases || merge_bases->next)
oidcpy(branch_base, null_oid(the_hash_algo));
else
oidcpy(branch_base, &merge_bases->item->object.oid);
commit_list_free(merge_bases);
}
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);
if (opts->type != REBASE_UNSPECIFIED && opts->type != REBASE_APPLY)
die(_("apply options and merge options cannot be used together"));
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 (opts->type != REBASE_UNSPECIFIED && opts->type != REBASE_MERGE)
die(_("apply options and merge options cannot be used together"));
opts->type = REBASE_MERGE;
return 0;
}
/* -i followed by -r is still explicitly interactive, but -r 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);
if (opts->type != REBASE_UNSPECIFIED && opts->type != REBASE_MERGE)
die(_("apply options and merge options cannot be used together"));
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, "stop"))
return EMPTY_STOP;
else if (!strcasecmp(value, "ask")) {
warning(_("--empty=ask is deprecated; use '--empty=stop' instead."));
return EMPTY_STOP;
}
die(_("unrecognized empty type '%s'; valid values are \"drop\", \"keep\", and \"stop\"."), value);
}
static int parse_opt_keep_empty(const struct option *opt, const char *arg,