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![Junio C Hamano](/assets/img/avatar_default.png)
The test to make sure that checkout fails when --track was asked for and we cannot set up tracking information in t7201 was wrong, and it turns out that the implementation for that feature itself was buggy. This fixes it. Signed-off-by: Junio C Hamano <gitster@pobox.com>
175 lines
4.3 KiB
C
175 lines
4.3 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 struct tracking *tracking)
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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 tracking->remote == NULL;
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case AUTOREBASE_REMOTE:
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return tracking->remote != 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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* 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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char key[1024];
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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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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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sprintf(key, "branch.%s.remote", new_ref);
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git_config_set(key, tracking.remote ? tracking.remote : ".");
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sprintf(key, "branch.%s.merge", new_ref);
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git_config_set(key, tracking.src ? tracking.src : orig_ref);
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printf("Branch %s set up to track %s branch %s.\n", new_ref,
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tracking.remote ? "remote" : "local", orig_ref);
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if (should_setup_rebase(&tracking)) {
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sprintf(key, "branch.%s.rebase", new_ref);
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git_config_set(key, "true");
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printf("This branch will rebase on pull.\n");
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}
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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;
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struct commit *commit;
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unsigned char sha1[20];
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char *real_ref, ref[PATH_MAX], msg[PATH_MAX + 20];
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int forcing = 0;
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snprintf(ref, sizeof ref, "refs/heads/%s", name);
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if (check_ref_format(ref))
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die("'%s' is not a valid branch name.", name);
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if (resolve_ref(ref, sha1, 1, NULL)) {
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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 (track == BRANCH_TRACK_EXPLICIT)
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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 (track == BRANCH_TRACK_EXPLICIT && !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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lock = lock_any_ref_for_update(ref, NULL, 0);
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if (!lock)
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die("Failed to lock ref for update: %s.", strerror(errno));
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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
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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 (write_ref_sha1(lock, sha1, msg) < 0)
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die("Failed to write ref: %s.", strerror(errno));
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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("SQUASH_MSG"));
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}
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