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rebase.c
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/*
* "git rebase" builtin command
*
* Copyright (c) 2018 Pratik Karki
*/
#include "builtin.h"
#include "run-command.h"
#include "exec-cmd.h"
#include "argv-array.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"
static char const * const builtin_rebase_usage[] = {
N_("git rebase [-i] [options] [--exec <cmd>] [--onto <newbase>] "
"[<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(apply_dir, "rebase-apply")
static GIT_PATH_FUNC(merge_dir, "rebase-merge")
enum rebase_type {
REBASE_UNSPECIFIED = -1,
REBASE_AM,
REBASE_MERGE,
REBASE_INTERACTIVE,
REBASE_PRESERVE_MERGES
};
static int use_builtin_rebase(void)
{
struct child_process cp = CHILD_PROCESS_INIT;
struct strbuf out = STRBUF_INIT;
int ret, env = git_env_bool("GIT_TEST_REBASE_USE_BUILTIN", -1);
if (env != -1)
return env;
argv_array_pushl(&cp.args,
"config", "--bool", "rebase.usebuiltin", NULL);
cp.git_cmd = 1;
if (capture_command(&cp, &out, 6)) {
strbuf_release(&out);
return 1;
}
strbuf_trim(&out);
ret = !strcmp("true", out.buf);
strbuf_release(&out);
return ret;
}
struct rebase_options {
enum rebase_type type;
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;
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 argv_array git_am_opts;
const char *action;
int signoff;
int allow_rerere_autoupdate;
int keep_empty;
int autosquash;
char *gpg_sign_opt;
int autostash;
char *cmd;
int allow_empty_message;
int rebase_merges, rebase_cousins;
char *strategy, *strategy_opts;
struct strbuf git_format_patch_opt;
};
static int is_interactive(struct rebase_options *opts)
{
return opts->type == REBASE_INTERACTIVE ||
opts->type == REBASE_PRESERVE_MERGES;
}
static void imply_interactive(struct rebase_options *opts, const char *option)
{
switch (opts->type) {
case REBASE_AM:
die(_("%s requires an interactive rebase"), option);
break;
case REBASE_INTERACTIVE:
case REBASE_PRESERVE_MERGES:
break;
case REBASE_MERGE:
/* we silently *upgrade* --merge to --interactive if needed */
default:
opts->type = REBASE_INTERACTIVE; /* 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;
}
/* Read one file, then strip line endings */
static int read_one(const char *path, struct strbuf *buf)
{
if (strbuf_read_file(buf, path, 0) < 0)
return error_errno(_("could not read '%s'"), path);
strbuf_trim_trailing_newline(buf);
return 0;
}
/* 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_one(state_dir_path("head-name", opts), &head_name) ||
read_one(state_dir_path("onto", opts), &buf))
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_one(state_dir_path("orig-head", opts), &buf))
return -1;
} else if (read_one(state_dir_path("head", opts), &buf))
return -1;
if (get_oid(buf.buf, &opts->orig_head))
return error(_("invalid orig-head: '%s'"), buf.buf);
strbuf_reset(&buf);
if (read_one(state_dir_path("quiet", opts), &buf))
return -1;
if (buf.len)
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_one(state_dir_path("allow_rerere_autoupdate", opts),
&buf))
return -1;
if (!strcmp(buf.buf, "--rerere-autoupdate"))
opts->allow_rerere_autoupdate = 1;
else if (!strcmp(buf.buf, "--no-rerere-autoupdate"))
opts->allow_rerere_autoupdate = 0;
else
warning(_("ignoring invalid allow_rerere_autoupdate: "
"'%s'"), buf.buf);
} else
opts->allow_rerere_autoupdate = -1;
if (file_exists(state_dir_path("gpg_sign_opt", opts))) {
strbuf_reset(&buf);
if (read_one(state_dir_path("gpg_sign_opt", opts),
&buf))
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_one(state_dir_path("strategy", opts), &buf))
return -1;
free(opts->strategy);
opts->strategy = xstrdup(buf.buf);
}
if (file_exists(state_dir_path("strategy_opts", opts))) {
strbuf_reset(&buf);
if (read_one(state_dir_path("strategy_opts", opts), &buf))
return -1;
free(opts->strategy_opts);
opts->strategy_opts = xstrdup(buf.buf);
}
strbuf_release(&buf);
return 0;
}
static int apply_autostash(struct rebase_options *opts)
{
const char *path = state_dir_path("autostash", opts);
struct strbuf autostash = STRBUF_INIT;
struct child_process stash_apply = CHILD_PROCESS_INIT;
if (!file_exists(path))
return 0;
if (read_one(path, &autostash))
return error(_("Could not read '%s'"), path);
/* Ensure that the hash is not mistaken for a number */
strbuf_addstr(&autostash, "^0");
argv_array_pushl(&stash_apply.args,
"stash", "apply", autostash.buf, NULL);
stash_apply.git_cmd = 1;
stash_apply.no_stderr = stash_apply.no_stdout =
stash_apply.no_stdin = 1;
if (!run_command(&stash_apply))
printf(_("Applied autostash.\n"));
else {
struct argv_array args = ARGV_ARRAY_INIT;
int res = 0;
argv_array_pushl(&args,
"stash", "store", "-m", "autostash", "-q",
autostash.buf, NULL);
if (run_command_v_opt(args.argv, RUN_GIT_CMD))
res = error(_("Cannot store %s"), autostash.buf);
argv_array_clear(&args);
strbuf_release(&autostash);
if (res)
return res;
fprintf(stderr,
_("Applying autostash resulted in conflicts.\n"
"Your changes are safe in the stash.\n"
"You can run \"git stash pop\" or \"git stash drop\" "
"at any time.\n"));
}
strbuf_release(&autostash);
return 0;
}
static int finish_rebase(struct rebase_options *opts)
{
struct strbuf dir = STRBUF_INIT;
const char *argv_gc_auto[] = { "gc", "--auto", NULL };
delete_ref(NULL, "REBASE_HEAD", NULL, REF_NO_DEREF);
apply_autostash(opts);
close_all_packs(the_repository->objects);
/*
* We ignore errors in 'gc --auto', since the
* user should see them.
*/
run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
strbuf_addstr(&dir, opts->state_dir);
remove_dir_recursively(&dir, 0);
strbuf_release(&dir);
return 0;
}
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 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_specific_rebase(struct rebase_options *opts)
{
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_INTERACTIVE) {
/* Run builtin interactive rebase */
struct child_process child = CHILD_PROCESS_INIT;
argv_array_pushf(&child.env_array, "GIT_CHERRY_PICK_HELP=%s",
resolvemsg);
if (!(opts->flags & REBASE_INTERACTIVE_EXPLICIT)) {
argv_array_push(&child.env_array, "GIT_EDITOR=:");
opts->autosquash = 0;
}
child.git_cmd = 1;
argv_array_push(&child.args, "rebase--interactive");
if (opts->action)
argv_array_pushf(&child.args, "--%s", opts->action);
if (opts->keep_empty)
argv_array_push(&child.args, "--keep-empty");
if (opts->rebase_merges)
argv_array_push(&child.args, "--rebase-merges");
if (opts->rebase_cousins)
argv_array_push(&child.args, "--rebase-cousins");
if (opts->autosquash)
argv_array_push(&child.args, "--autosquash");
if (opts->flags & REBASE_VERBOSE)
argv_array_push(&child.args, "--verbose");
if (opts->flags & REBASE_FORCE)
argv_array_push(&child.args, "--no-ff");
if (opts->restrict_revision)
argv_array_pushf(&child.args,
"--restrict-revision=^%s",
oid_to_hex(&opts->restrict_revision->object.oid));
if (opts->upstream)
argv_array_pushf(&child.args, "--upstream=%s",
oid_to_hex(&opts->upstream->object.oid));
if (opts->onto)
argv_array_pushf(&child.args, "--onto=%s",
oid_to_hex(&opts->onto->object.oid));
if (opts->squash_onto)
argv_array_pushf(&child.args, "--squash-onto=%s",
oid_to_hex(opts->squash_onto));
if (opts->onto_name)
argv_array_pushf(&child.args, "--onto-name=%s",
opts->onto_name);
argv_array_pushf(&child.args, "--head-name=%s",
opts->head_name ?
opts->head_name : "detached HEAD");
if (opts->strategy)
argv_array_pushf(&child.args, "--strategy=%s",
opts->strategy);
if (opts->strategy_opts)
argv_array_pushf(&child.args, "--strategy-opts=%s",
opts->strategy_opts);
if (opts->switch_to)
argv_array_pushf(&child.args, "--switch-to=%s",
opts->switch_to);
if (opts->cmd)
argv_array_pushf(&child.args, "--cmd=%s", opts->cmd);
if (opts->allow_empty_message)
argv_array_push(&child.args, "--allow-empty-message");
if (opts->allow_rerere_autoupdate > 0)
argv_array_push(&child.args, "--rerere-autoupdate");
else if (opts->allow_rerere_autoupdate == 0)
argv_array_push(&child.args, "--no-rerere-autoupdate");
if (opts->gpg_sign_opt)
argv_array_push(&child.args, opts->gpg_sign_opt);
if (opts->signoff)
argv_array_push(&child.args, "--signoff");
status = run_command(&child);
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);
add_var(&script_snippet, "GIT_QUIET",
opts->flags & REBASE_NO_QUIET ? "" : "t");
sq_quote_argv_pretty(&buf, opts->git_am_opts.argv);
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 < 0 ? "" :
opts->allow_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_interactive(opts) &&
!(opts->flags & REBASE_INTERACTIVE_EXPLICIT)) {
strbuf_addstr(&script_snippet,
"GIT_EDITOR=:; export GIT_EDITOR; ");
opts->autosquash = 0;
}
switch (opts->type) {
case REBASE_AM:
backend = "git-rebase--am";
backend_func = "git_rebase__am";
break;
case REBASE_MERGE:
backend = "git-rebase--merge";
backend_func = "git_rebase__merge";
break;
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 && . git-rebase--common &&"
" . %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_INTERACTIVE)
; /* interactive rebase 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(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;
}
#define GIT_REFLOG_ACTION_ENVIRONMENT "GIT_REFLOG_ACTION"
#define RESET_HEAD_DETACH (1<<0)
#define RESET_HEAD_HARD (1<<1)
static int reset_head(struct object_id *oid, const char *action,
const char *switch_to_branch, unsigned flags,
const char *reflog_orig_head, const char *reflog_head)
{
unsigned detach_head = flags & RESET_HEAD_DETACH;
unsigned reset_hard = flags & RESET_HEAD_HARD;
struct object_id head_oid;
struct tree_desc desc[2] = { { NULL }, { NULL } };
struct lock_file lock = LOCK_INIT;
struct unpack_trees_options unpack_tree_opts;
struct tree *tree;
const char *reflog_action;
struct strbuf msg = STRBUF_INIT;
size_t prefix_len;
struct object_id *orig = NULL, oid_orig,
*old_orig = NULL, oid_old_orig;
int ret = 0, nr = 0;
if (switch_to_branch && !starts_with(switch_to_branch, "refs/"))
BUG("Not a fully qualified branch: '%s'", switch_to_branch);
if (hold_locked_index(&lock, LOCK_REPORT_ON_ERROR) < 0) {
ret = -1;
goto leave_reset_head;
}
if ((!oid || !reset_hard) && get_oid("HEAD", &head_oid)) {
ret = error(_("could not determine HEAD revision"));
goto leave_reset_head;
}
if (!oid)
oid = &head_oid;
memset(&unpack_tree_opts, 0, sizeof(unpack_tree_opts));
setup_unpack_trees_porcelain(&unpack_tree_opts, action);
unpack_tree_opts.head_idx = 1;
unpack_tree_opts.src_index = the_repository->index;
unpack_tree_opts.dst_index = the_repository->index;
unpack_tree_opts.fn = reset_hard ? oneway_merge : twoway_merge;
unpack_tree_opts.update = 1;
unpack_tree_opts.merge = 1;
if (!detach_head)
unpack_tree_opts.reset = 1;
if (read_index_unmerged(the_repository->index) < 0) {
ret = error(_("could not read index"));
goto leave_reset_head;
}
if (!reset_hard && !fill_tree_descriptor(&desc[nr++], &head_oid)) {
ret = error(_("failed to find tree of %s"),
oid_to_hex(&head_oid));
goto leave_reset_head;
}
if (!fill_tree_descriptor(&desc[nr++], oid)) {
ret = error(_("failed to find tree of %s"), oid_to_hex(oid));
goto leave_reset_head;
}
if (unpack_trees(nr, desc, &unpack_tree_opts)) {
ret = -1;
goto leave_reset_head;
}
tree = parse_tree_indirect(oid);
prime_cache_tree(the_repository, the_repository->index, tree);
if (write_locked_index(the_repository->index, &lock, COMMIT_LOCK) < 0) {
ret = error(_("could not write index"));
goto leave_reset_head;
}
reflog_action = getenv(GIT_REFLOG_ACTION_ENVIRONMENT);
strbuf_addf(&msg, "%s: ", reflog_action ? reflog_action : "rebase");
prefix_len = msg.len;
if (!get_oid("ORIG_HEAD", &oid_old_orig))
old_orig = &oid_old_orig;
if (!get_oid("HEAD", &oid_orig)) {
orig = &oid_orig;
if (!reflog_orig_head) {
strbuf_addstr(&msg, "updating ORIG_HEAD");
reflog_orig_head = msg.buf;
}
update_ref(reflog_orig_head, "ORIG_HEAD", orig, old_orig, 0,
UPDATE_REFS_MSG_ON_ERR);
} else if (old_orig)
delete_ref(NULL, "ORIG_HEAD", old_orig, 0);
if (!reflog_head) {
strbuf_setlen(&msg, prefix_len);
strbuf_addstr(&msg, "updating HEAD");
reflog_head = msg.buf;
}
if (!switch_to_branch)
ret = update_ref(reflog_head, "HEAD", oid, orig,
detach_head ? REF_NO_DEREF : 0,
UPDATE_REFS_MSG_ON_ERR);
else {
ret = create_symref("HEAD", switch_to_branch, msg.buf);
if (!ret)
ret = update_ref(reflog_head, "HEAD", oid, NULL, 0,
UPDATE_REFS_MSG_ON_ERR);
}
leave_reset_head:
strbuf_release(&msg);
rollback_lock_file(&lock);
while (nr)
free((void *)desc[--nr].buffer);
return ret;
}
static int rebase_config(const char *var, const char *value, void *data)
{
struct rebase_options *opts = data;
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;
}
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 object_id *head_oid,
struct object_id *merge_base)
{
struct commit *head = lookup_commit(the_repository, head_oid);
struct commit_list *merge_bases;
int res;
if (!head)
return 0;
merge_bases = get_merge_bases(onto, head);
if (merge_bases && !merge_bases->next) {
oidcpy(merge_base, &merge_bases->item->object.oid);
res = oideq(merge_base, &onto->object.oid);
} else {
oidcpy(merge_base, &null_oid);
res = 0;
}
free_commit_list(merge_bases);
return res && is_linear_history(onto, head);
}
/* -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_interactive(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_INTERACTIVE;
opts->flags |= REBASE_INTERACTIVE_EXPLICIT;
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_interactive(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 -i (%s)", options->action);
setenv(GIT_REFLOG_ACTION_ENVIRONMENT, buf.buf, 1);
strbuf_release(&buf);
}
int cmd_rebase(int argc, const char **argv, const char *prefix)
{
struct rebase_options options = {
.type = REBASE_UNSPECIFIED,
.flags = REBASE_NO_QUIET,
.git_am_opts = ARGV_ARRAY_INIT,
.allow_rerere_autoupdate = -1,
.allow_empty_message = 1,
.git_format_patch_opt = STRBUF_INIT,
};
const char *branch_name;
int ret, flags, total_argc, in_progress = 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;
enum {
NO_ACTION,
ACTION_CONTINUE,
ACTION_SKIP,
ACTION_ABORT,
ACTION_QUIT,
ACTION_EDIT_TODO,
ACTION_SHOW_CURRENT_PATCH,
} action = NO_ACTION;
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;
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, "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_PASSTHRU_ARGV(0, "ignore-whitespace", &options.git_am_opts,
NULL, N_("passed to 'git am'"),
PARSE_OPT_NOARG),
OPT_PASSTHRU_ARGV(0, "committer-date-is-author-date",
&options.git_am_opts, NULL,
N_("passed to 'git am'"), PARSE_OPT_NOARG),
OPT_PASSTHRU_ARGV(0, "ignore-date", &options.git_am_opts, NULL,
N_("passed to 'git am'"), PARSE_OPT_NOARG),
OPT_PASSTHRU_ARGV('C', NULL, &options.git_am_opts, N_("n"),
N_("passed to 'git apply'"), 0),
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),
{ OPTION_CALLBACK, 'm', "merge", &options, NULL,
N_("use merging strategies to rebase"),
PARSE_OPT_NOARG | PARSE_OPT_NONEG,
parse_opt_merge },
{ OPTION_CALLBACK, '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('p', "preserve-merges", &options.type,
N_("try to recreate merges instead of ignoring "
"them"), REBASE_PRESERVE_MERGES),
OPT_BOOL(0, "rerere-autoupdate",
&options.allow_rerere_autoupdate,
N_("allow rerere to update index with resolved "
"conflict")),
OPT_BOOL('k', "keep-empty", &options.keep_empty,
N_("preserve empty commits during rebase")),
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_BOOL(0, "autostash", &options.autostash,
N_("automatically stash/stash pop before and after")),
OPT_STRING_LIST('x', "exec", &exec, N_("exec"),
N_("add exec lines after each commit of the "
"editable list")),
OPT_BOOL(0, "allow-empty-message",
&options.allow_empty_message,
N_("allow rebasing commits with empty messages")),
{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_END(),
};
int i;
/*
* NEEDSWORK: Once the builtin rebase has been tested enough
* and git-legacy-rebase.sh is retired to contrib/, this preamble
* can be removed.
*/
if (!use_builtin_rebase()) {
const char *path = mkpath("%s/git-legacy-rebase",
git_exec_path());
if (sane_execvp(path, (char **)argv) < 0)
die_errno(_("could not exec %s"), path);
else
BUG("sane_execvp() returned???");
}
if (argc == 2 && !strcmp(argv[1], "-h"))
usage_with_options(builtin_rebase_usage,
builtin_rebase_options);
prefix = setup_git_directory();
trace_repo_setup(prefix);
setup_work_tree();
git_config(rebase_config, &options);
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_AM;
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_INTERACTIVE;
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 != NO_ACTION && 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 (action != NO_ACTION && !in_progress)
die(_("No rebase in progress?"));
setenv(GIT_REFLOG_ACTION_ENVIRONMENT, "rebase", 0);
if (action == ACTION_EDIT_TODO && !is_interactive(&options))