mirror of
https://github.com/git/git
synced 2024-08-25 02:35:46 +00:00
501 lines
13 KiB
C
501 lines
13 KiB
C
#include "git-compat-util.h"
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#include "cache.h"
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#include "config.h"
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#include "branch.h"
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#include "refs.h"
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#include "refspec.h"
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#include "remote.h"
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#include "sequencer.h"
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#include "commit.h"
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#include "worktree.h"
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struct tracking {
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struct refspec_item spec;
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struct string_list *srcs;
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const char *remote;
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int matches;
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};
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static int find_tracked_branch(struct remote *remote, void *priv)
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{
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struct tracking *tracking = priv;
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if (!remote_find_tracking(remote, &tracking->spec)) {
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if (++tracking->matches == 1) {
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string_list_append(tracking->srcs, tracking->spec.src);
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tracking->remote = remote->name;
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} else {
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free(tracking->spec.src);
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string_list_clear(tracking->srcs, 0);
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}
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tracking->spec.src = NULL;
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}
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return 0;
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}
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static int should_setup_rebase(const char *origin)
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{
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switch (autorebase) {
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case AUTOREBASE_NEVER:
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return 0;
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case AUTOREBASE_LOCAL:
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return origin == NULL;
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case AUTOREBASE_REMOTE:
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return origin != NULL;
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case AUTOREBASE_ALWAYS:
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return 1;
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}
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return 0;
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}
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/**
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* Install upstream tracking configuration for a branch; specifically, add
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* `branch.<name>.remote` and `branch.<name>.merge` entries.
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*
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* `flag` contains integer flags for options; currently only
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* BRANCH_CONFIG_VERBOSE is checked.
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*
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* `local` is the name of the branch whose configuration we're installing.
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*
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* `origin` is the name of the remote owning the upstream branches. NULL means
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* the upstream branches are local to this repo.
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*
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* `remotes` is a list of refs that are upstream of local
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*/
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static int install_branch_config_multiple_remotes(int flag, const char *local,
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const char *origin, struct string_list *remotes)
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{
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const char *shortname = NULL;
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struct strbuf key = STRBUF_INIT;
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struct string_list_item *item;
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int rebasing = should_setup_rebase(origin);
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if (!remotes->nr)
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BUG("must provide at least one remote for branch config");
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if (rebasing && remotes->nr > 1)
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die(_("cannot inherit upstream tracking configuration of "
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"multiple refs when rebasing is requested"));
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/*
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* If the new branch is trying to track itself, something has gone
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* wrong. Warn the user and don't proceed any further.
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*/
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if (!origin)
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for_each_string_list_item(item, remotes)
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if (skip_prefix(item->string, "refs/heads/", &shortname)
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&& !strcmp(local, shortname)) {
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warning(_("not setting branch '%s' as its own upstream"),
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local);
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return 0;
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}
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strbuf_addf(&key, "branch.%s.remote", local);
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if (git_config_set_gently(key.buf, origin ? origin : ".") < 0)
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goto out_err;
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strbuf_reset(&key);
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strbuf_addf(&key, "branch.%s.merge", local);
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/*
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* We want to overwrite any existing config with all the branches in
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* "remotes". Override any existing config, then write our branches. If
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* more than one is provided, use CONFIG_REGEX_NONE to preserve what
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* we've written so far.
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*/
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if (git_config_set_gently(key.buf, NULL) < 0)
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goto out_err;
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for_each_string_list_item(item, remotes)
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if (git_config_set_multivar_gently(key.buf, item->string, CONFIG_REGEX_NONE, 0) < 0)
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goto out_err;
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if (rebasing) {
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strbuf_reset(&key);
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strbuf_addf(&key, "branch.%s.rebase", local);
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if (git_config_set_gently(key.buf, "true") < 0)
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goto out_err;
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}
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strbuf_release(&key);
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if (flag & BRANCH_CONFIG_VERBOSE) {
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struct strbuf tmp_ref_name = STRBUF_INIT;
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struct string_list friendly_ref_names = STRING_LIST_INIT_DUP;
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for_each_string_list_item(item, remotes) {
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shortname = item->string;
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skip_prefix(shortname, "refs/heads/", &shortname);
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if (origin) {
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strbuf_addf(&tmp_ref_name, "%s/%s",
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origin, shortname);
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string_list_append_nodup(
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&friendly_ref_names,
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strbuf_detach(&tmp_ref_name, NULL));
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} else {
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string_list_append(
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&friendly_ref_names, shortname);
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}
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}
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if (remotes->nr == 1) {
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/*
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* Rebasing is only allowed in the case of a single
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* upstream branch.
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*/
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printf_ln(rebasing ?
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_("branch '%s' set up to track '%s' by rebasing.") :
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_("branch '%s' set up to track '%s'."),
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local, friendly_ref_names.items[0].string);
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} else {
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printf_ln(_("branch '%s' set up to track:"), local);
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for_each_string_list_item(item, &friendly_ref_names)
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printf_ln(" %s", item->string);
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}
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string_list_clear(&friendly_ref_names, 0);
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}
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return 0;
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out_err:
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strbuf_release(&key);
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error(_("unable to write upstream branch configuration"));
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advise(_("\nAfter fixing the error cause you may try to fix up\n"
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"the remote tracking information by invoking:"));
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if (remotes->nr == 1)
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advise(" git branch --set-upstream-to=%s%s%s",
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origin ? origin : "",
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origin ? "/" : "",
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remotes->items[0].string);
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else {
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advise(" git config --add branch.\"%s\".remote %s",
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local, origin ? origin : ".");
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for_each_string_list_item(item, remotes)
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advise(" git config --add branch.\"%s\".merge %s",
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local, item->string);
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}
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return -1;
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}
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int install_branch_config(int flag, const char *local, const char *origin,
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const char *remote)
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{
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int ret;
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struct string_list remotes = STRING_LIST_INIT_DUP;
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string_list_append(&remotes, remote);
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ret = install_branch_config_multiple_remotes(flag, local, origin, &remotes);
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string_list_clear(&remotes, 0);
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return ret;
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}
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static int inherit_tracking(struct tracking *tracking, const char *orig_ref)
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{
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const char *bare_ref;
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struct branch *branch;
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int i;
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bare_ref = orig_ref;
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skip_prefix(orig_ref, "refs/heads/", &bare_ref);
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branch = branch_get(bare_ref);
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if (!branch->remote_name) {
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warning(_("asked to inherit tracking from '%s', but no remote is set"),
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bare_ref);
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return -1;
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}
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if (branch->merge_nr < 1 || !branch->merge_name || !branch->merge_name[0]) {
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warning(_("asked to inherit tracking from '%s', but no merge configuration is set"),
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bare_ref);
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return -1;
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}
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tracking->remote = xstrdup(branch->remote_name);
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for (i = 0; i < branch->merge_nr; i++)
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string_list_append(tracking->srcs, branch->merge_name[i]);
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return 0;
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}
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/*
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* This is called when new_ref is branched off of orig_ref, and tries
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* to infer the settings for branch.<new_ref>.{remote,merge} from the
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* config.
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*/
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static void setup_tracking(const char *new_ref, const char *orig_ref,
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enum branch_track track, int quiet)
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{
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struct tracking tracking;
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struct string_list tracking_srcs = STRING_LIST_INIT_DUP;
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int config_flags = quiet ? 0 : BRANCH_CONFIG_VERBOSE;
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memset(&tracking, 0, sizeof(tracking));
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tracking.spec.dst = (char *)orig_ref;
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tracking.srcs = &tracking_srcs;
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if (track != BRANCH_TRACK_INHERIT)
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for_each_remote(find_tracked_branch, &tracking);
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else if (inherit_tracking(&tracking, orig_ref))
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return;
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if (!tracking.matches)
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switch (track) {
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case BRANCH_TRACK_ALWAYS:
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case BRANCH_TRACK_EXPLICIT:
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case BRANCH_TRACK_OVERRIDE:
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case BRANCH_TRACK_INHERIT:
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break;
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default:
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return;
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}
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if (tracking.matches > 1)
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die(_("not tracking: ambiguous information for ref %s"),
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orig_ref);
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if (tracking.srcs->nr < 1)
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string_list_append(tracking.srcs, orig_ref);
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if (install_branch_config_multiple_remotes(config_flags, new_ref,
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tracking.remote, tracking.srcs) < 0)
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exit(-1);
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string_list_clear(tracking.srcs, 0);
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}
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int read_branch_desc(struct strbuf *buf, const char *branch_name)
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{
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char *v = NULL;
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struct strbuf name = STRBUF_INIT;
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strbuf_addf(&name, "branch.%s.description", branch_name);
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if (git_config_get_string(name.buf, &v)) {
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strbuf_release(&name);
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return -1;
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}
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strbuf_addstr(buf, v);
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free(v);
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strbuf_release(&name);
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return 0;
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}
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/*
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* Check if 'name' can be a valid name for a branch; die otherwise.
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* Return 1 if the named branch already exists; return 0 otherwise.
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* Fill ref with the full refname for the branch.
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*/
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int validate_branchname(const char *name, struct strbuf *ref)
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{
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if (strbuf_check_branch_ref(ref, name))
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die(_("'%s' is not a valid branch name"), name);
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return ref_exists(ref->buf);
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}
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/*
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* Check if a branch 'name' can be created as a new branch; die otherwise.
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* 'force' can be used when it is OK for the named branch already exists.
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* Return 1 if the named branch already exists; return 0 otherwise.
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* Fill ref with the full refname for the branch.
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*/
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int validate_new_branchname(const char *name, struct strbuf *ref, int force)
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{
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struct worktree **worktrees;
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const struct worktree *wt;
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if (!validate_branchname(name, ref))
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return 0;
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if (!force)
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die(_("a branch named '%s' already exists"),
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ref->buf + strlen("refs/heads/"));
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worktrees = get_worktrees();
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wt = find_shared_symref(worktrees, "HEAD", ref->buf);
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if (wt && !wt->is_bare)
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die(_("cannot force update the branch '%s' "
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"checked out at '%s'"),
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ref->buf + strlen("refs/heads/"), wt->path);
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free_worktrees(worktrees);
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return 1;
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}
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static int check_tracking_branch(struct remote *remote, void *cb_data)
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{
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char *tracking_branch = cb_data;
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struct refspec_item query;
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memset(&query, 0, sizeof(struct refspec_item));
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query.dst = tracking_branch;
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return !remote_find_tracking(remote, &query);
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}
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static int validate_remote_tracking_branch(char *ref)
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{
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return !for_each_remote(check_tracking_branch, ref);
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}
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static const char upstream_not_branch[] =
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N_("cannot set up tracking information; starting point '%s' is not a branch");
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static const char upstream_missing[] =
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N_("the requested upstream branch '%s' does not exist");
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static const char upstream_advice[] =
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N_("\n"
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"If you are planning on basing your work on an upstream\n"
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"branch that already exists at the remote, you may need to\n"
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"run \"git fetch\" to retrieve it.\n"
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"\n"
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"If you are planning to push out a new local branch that\n"
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"will track its remote counterpart, you may want to use\n"
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"\"git push -u\" to set the upstream config as you push.");
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void create_branch(struct repository *r,
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const char *name, const char *start_name,
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int force, int clobber_head_ok, int reflog,
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int quiet, enum branch_track track)
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{
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struct commit *commit;
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struct object_id oid;
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char *real_ref;
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struct strbuf ref = STRBUF_INIT;
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int forcing = 0;
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int dont_change_ref = 0;
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int explicit_tracking = 0;
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if (track == BRANCH_TRACK_EXPLICIT || track == BRANCH_TRACK_OVERRIDE)
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explicit_tracking = 1;
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if ((track == BRANCH_TRACK_OVERRIDE || clobber_head_ok)
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? validate_branchname(name, &ref)
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: validate_new_branchname(name, &ref, force)) {
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if (!force)
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dont_change_ref = 1;
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else
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forcing = 1;
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}
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real_ref = NULL;
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if (get_oid_mb(start_name, &oid)) {
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if (explicit_tracking) {
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if (advice_enabled(ADVICE_SET_UPSTREAM_FAILURE)) {
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error(_(upstream_missing), start_name);
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advise(_(upstream_advice));
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exit(1);
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}
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die(_(upstream_missing), start_name);
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}
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die(_("not a valid object name: '%s'"), start_name);
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}
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switch (dwim_ref(start_name, strlen(start_name), &oid, &real_ref, 0)) {
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case 0:
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/* Not branching from any existing branch */
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if (explicit_tracking)
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die(_(upstream_not_branch), start_name);
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break;
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case 1:
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/* Unique completion -- good, only if it is a real branch */
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if (!starts_with(real_ref, "refs/heads/") &&
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validate_remote_tracking_branch(real_ref)) {
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if (explicit_tracking)
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die(_(upstream_not_branch), start_name);
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else
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FREE_AND_NULL(real_ref);
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}
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break;
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default:
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die(_("ambiguous object name: '%s'"), start_name);
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break;
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}
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if ((commit = lookup_commit_reference(r, &oid)) == NULL)
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die(_("not a valid branch point: '%s'"), start_name);
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oidcpy(&oid, &commit->object.oid);
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if (reflog)
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log_all_ref_updates = LOG_REFS_NORMAL;
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if (!dont_change_ref) {
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struct ref_transaction *transaction;
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struct strbuf err = STRBUF_INIT;
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char *msg;
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if (forcing)
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msg = xstrfmt("branch: Reset to %s", start_name);
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else
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msg = xstrfmt("branch: Created from %s", start_name);
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transaction = ref_transaction_begin(&err);
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if (!transaction ||
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ref_transaction_update(transaction, ref.buf,
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&oid, forcing ? NULL : null_oid(),
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0, msg, &err) ||
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ref_transaction_commit(transaction, &err))
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die("%s", err.buf);
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ref_transaction_free(transaction);
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strbuf_release(&err);
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free(msg);
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}
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if (real_ref && track)
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setup_tracking(ref.buf + 11, real_ref, track, quiet);
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strbuf_release(&ref);
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free(real_ref);
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}
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void remove_merge_branch_state(struct repository *r)
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{
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unlink(git_path_merge_head(r));
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unlink(git_path_merge_rr(r));
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unlink(git_path_merge_msg(r));
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unlink(git_path_merge_mode(r));
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unlink(git_path_auto_merge(r));
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save_autostash(git_path_merge_autostash(r));
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}
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void remove_branch_state(struct repository *r, int verbose)
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{
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sequencer_post_commit_cleanup(r, verbose);
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unlink(git_path_squash_msg(r));
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remove_merge_branch_state(r);
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}
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void die_if_checked_out(const char *branch, int ignore_current_worktree)
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{
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struct worktree **worktrees = get_worktrees();
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const struct worktree *wt;
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wt = find_shared_symref(worktrees, "HEAD", branch);
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if (wt && (!ignore_current_worktree || !wt->is_current)) {
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skip_prefix(branch, "refs/heads/", &branch);
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die(_("'%s' is already checked out at '%s'"), branch, wt->path);
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}
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free_worktrees(worktrees);
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}
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int replace_each_worktree_head_symref(const char *oldref, const char *newref,
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const char *logmsg)
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{
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int ret = 0;
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struct worktree **worktrees = get_worktrees();
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int i;
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for (i = 0; worktrees[i]; i++) {
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struct ref_store *refs;
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if (worktrees[i]->is_detached)
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continue;
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if (!worktrees[i]->head_ref)
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continue;
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if (strcmp(oldref, worktrees[i]->head_ref))
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continue;
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refs = get_worktree_ref_store(worktrees[i]);
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if (refs_create_symref(refs, "HEAD", newref, logmsg))
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ret = error(_("HEAD of working tree %s is not updated"),
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worktrees[i]->path);
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}
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free_worktrees(worktrees);
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return ret;
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}
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