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![Matthieu Moy](/assets/img/avatar_default.png)
Previous patch allows commands like "git branch --set-upstream foo foo", which doesn't make much sense. Warn the user and don't change the configuration in this case. Don't die to let the caller finish its job in such case. Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr> Signed-off-by: Ilari Liusvaara <ilari.liusvaara@elisanet.fi> Signed-off-by: Junio C Hamano <gitster@pobox.com>
226 lines
5.4 KiB
C
226 lines
5.4 KiB
C
#include "cache.h"
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#include "branch.h"
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#include "refs.h"
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#include "remote.h"
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#include "commit.h"
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struct tracking {
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struct refspec spec;
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char *src;
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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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tracking->src = 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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if (tracking->src) {
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free(tracking->src);
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tracking->src = NULL;
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}
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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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void install_branch_config(int flag, const char *local, const char *origin, const char *remote)
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{
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const char *shortname = remote + 11;
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int remote_is_branch = !prefixcmp(remote, "refs/heads/");
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struct strbuf key = STRBUF_INIT;
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int rebasing = should_setup_rebase(origin);
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if (remote_is_branch
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&& !strcmp(local, shortname)
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&& !origin) {
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warning("Not setting branch %s as its own upstream.",
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local);
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return;
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}
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strbuf_addf(&key, "branch.%s.remote", local);
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git_config_set(key.buf, origin ? origin : ".");
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strbuf_reset(&key);
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strbuf_addf(&key, "branch.%s.merge", local);
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git_config_set(key.buf, remote);
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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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git_config_set(key.buf, "true");
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}
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if (flag & BRANCH_CONFIG_VERBOSE) {
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strbuf_reset(&key);
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strbuf_addstr(&key, origin ? "remote" : "local");
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/* Are we tracking a proper "branch"? */
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if (remote_is_branch) {
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strbuf_addf(&key, " branch %s", shortname);
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if (origin)
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strbuf_addf(&key, " from %s", origin);
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}
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else
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strbuf_addf(&key, " ref %s", remote);
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printf("Branch %s set up to track %s%s.\n",
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local, key.buf,
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rebasing ? " by rebasing" : "");
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}
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strbuf_release(&key);
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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 int setup_tracking(const char *new_ref, const char *orig_ref,
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enum branch_track track)
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{
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struct tracking tracking;
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if (strlen(new_ref) > 1024 - 7 - 7 - 1)
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return error("Tracking not set up: name too long: %s",
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new_ref);
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memset(&tracking, 0, sizeof(tracking));
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tracking.spec.dst = (char *)orig_ref;
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if (for_each_remote(find_tracked_branch, &tracking))
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return 1;
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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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break;
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default:
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return 1;
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}
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if (tracking.matches > 1)
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return error("Not tracking: ambiguous information for ref %s",
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orig_ref);
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install_branch_config(BRANCH_CONFIG_VERBOSE, new_ref, tracking.remote,
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tracking.src ? tracking.src : orig_ref);
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free(tracking.src);
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return 0;
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}
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void create_branch(const char *head,
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const char *name, const char *start_name,
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int force, int reflog, enum branch_track track)
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{
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struct ref_lock *lock = NULL;
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struct commit *commit;
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unsigned char sha1[20];
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char *real_ref, msg[PATH_MAX + 20];
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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 (strbuf_check_branch_ref(&ref, name))
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die("'%s' is not a valid branch name.", name);
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if (resolve_ref(ref.buf, sha1, 1, NULL)) {
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if (!force && track == BRANCH_TRACK_OVERRIDE)
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dont_change_ref = 1;
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else if (!force)
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die("A branch named '%s' already exists.", name);
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else if (!is_bare_repository() && !strcmp(head, name))
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die("Cannot force update the current branch.");
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forcing = 1;
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}
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real_ref = NULL;
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if (get_sha1(start_name, sha1))
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die("Not a valid object name: '%s'.", start_name);
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switch (dwim_ref(start_name, strlen(start_name), sha1, &real_ref)) {
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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("Cannot setup tracking information; starting point is not a branch.");
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break;
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case 1:
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/* Unique completion -- good, only if it is a real ref */
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if (explicit_tracking && !strcmp(real_ref, "HEAD"))
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die("Cannot setup tracking information; starting point is not a branch.");
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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(sha1)) == NULL)
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die("Not a valid branch point: '%s'.", start_name);
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hashcpy(sha1, commit->object.sha1);
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if (!dont_change_ref) {
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lock = lock_any_ref_for_update(ref.buf, NULL, 0);
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if (!lock)
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die_errno("Failed to lock ref for update");
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}
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if (reflog)
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log_all_ref_updates = 1;
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if (forcing)
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snprintf(msg, sizeof msg, "branch: Reset from %s",
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start_name);
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else if (!dont_change_ref)
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snprintf(msg, sizeof msg, "branch: Created from %s",
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start_name);
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if (real_ref && track)
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setup_tracking(name, real_ref, track);
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if (!dont_change_ref)
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if (write_ref_sha1(lock, sha1, msg) < 0)
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die_errno("Failed to write ref");
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strbuf_release(&ref);
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free(real_ref);
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}
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void remove_branch_state(void)
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{
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unlink(git_path("MERGE_HEAD"));
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unlink(git_path("MERGE_RR"));
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unlink(git_path("MERGE_MSG"));
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unlink(git_path("MERGE_MODE"));
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unlink(git_path("SQUASH_MSG"));
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}
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