diff options
Diffstat (limited to 'branch.c')
| -rw-r--r-- | branch.c | 279 |
1 files changed, 199 insertions, 80 deletions
@@ -1,3 +1,4 @@ +#include "git-compat-util.h" #include "cache.h" #include "branch.h" #include "refs.h" @@ -49,15 +50,14 @@ static int should_setup_rebase(const char *origin) void install_branch_config(int flag, const char *local, const char *origin, const char *remote) { - const char *shortname = remote + 11; - int remote_is_branch = !prefixcmp(remote, "refs/heads/"); + const char *shortname = NULL; struct strbuf key = STRBUF_INIT; int rebasing = should_setup_rebase(origin); - if (remote_is_branch + if (skip_prefix(remote, "refs/heads/", &shortname) && !strcmp(local, shortname) && !origin) { - warning("Not setting branch %s as its own upstream.", + warning(_("Not setting branch %s as its own upstream."), local); return; } @@ -74,25 +74,33 @@ void install_branch_config(int flag, const char *local, const char *origin, cons strbuf_addf(&key, "branch.%s.rebase", local); git_config_set(key.buf, "true"); } + strbuf_release(&key); if (flag & BRANCH_CONFIG_VERBOSE) { - strbuf_reset(&key); - - strbuf_addstr(&key, origin ? "remote" : "local"); - - /* Are we tracking a proper "branch"? */ - if (remote_is_branch) { - strbuf_addf(&key, " branch %s", shortname); + if (shortname) { + if (origin) + printf_ln(rebasing ? + _("Branch %s set up to track remote branch %s from %s by rebasing.") : + _("Branch %s set up to track remote branch %s from %s."), + local, shortname, origin); + else + printf_ln(rebasing ? + _("Branch %s set up to track local branch %s by rebasing.") : + _("Branch %s set up to track local branch %s."), + local, shortname); + } else { if (origin) - strbuf_addf(&key, " from %s", origin); + printf_ln(rebasing ? + _("Branch %s set up to track remote ref %s by rebasing.") : + _("Branch %s set up to track remote ref %s."), + local, remote); + else + printf_ln(rebasing ? + _("Branch %s set up to track local ref %s by rebasing.") : + _("Branch %s set up to track local ref %s."), + local, remote); } - else - strbuf_addf(&key, " ref %s", remote); - printf("Branch %s set up to track %s%s.\n", - local, key.buf, - rebasing ? " by rebasing" : ""); } - strbuf_release(&key); } /* @@ -101,13 +109,10 @@ void install_branch_config(int flag, const char *local, const char *origin, cons * config. */ static int setup_tracking(const char *new_ref, const char *orig_ref, - enum branch_track track) + enum branch_track track, int quiet) { struct tracking tracking; - - if (strlen(new_ref) > 1024 - 7 - 7 - 1) - return error("Tracking not set up: name too long: %s", - new_ref); + int config_flags = quiet ? 0 : BRANCH_CONFIG_VERBOSE; memset(&tracking, 0, sizeof(tracking)); tracking.spec.dst = (char *)orig_ref; @@ -125,43 +130,27 @@ static int setup_tracking(const char *new_ref, const char *orig_ref, } if (tracking.matches > 1) - return error("Not tracking: ambiguous information for ref %s", + return error(_("Not tracking: ambiguous information for ref %s"), orig_ref); - install_branch_config(BRANCH_CONFIG_VERBOSE, new_ref, tracking.remote, + install_branch_config(config_flags, new_ref, tracking.remote, tracking.src ? tracking.src : orig_ref); free(tracking.src); return 0; } -struct branch_desc_cb { - const char *config_name; - const char *value; -}; - -static int read_branch_desc_cb(const char *var, const char *value, void *cb) -{ - struct branch_desc_cb *desc = cb; - if (strcmp(desc->config_name, var)) - return 0; - free((char *)desc->value); - return git_config_string(&desc->value, var, value); -} - int read_branch_desc(struct strbuf *buf, const char *branch_name) { - struct branch_desc_cb cb; + char *v = NULL; struct strbuf name = STRBUF_INIT; strbuf_addf(&name, "branch.%s.description", branch_name); - cb.config_name = name.buf; - cb.value = NULL; - if (git_config(read_branch_desc_cb, &cb) < 0) { + if (git_config_get_string(name.buf, &v)) { strbuf_release(&name); return -1; } - if (cb.value) - strbuf_addstr(buf, cb.value); + strbuf_addstr(buf, v); + free(v); strbuf_release(&name); return 0; } @@ -170,30 +159,57 @@ int validate_new_branchname(const char *name, struct strbuf *ref, int force, int attr_only) { if (strbuf_check_branch_ref(ref, name)) - die("'%s' is not a valid branch name.", name); + die(_("'%s' is not a valid branch name."), name); if (!ref_exists(ref->buf)) return 0; else if (!force && !attr_only) - die("A branch named '%s' already exists.", ref->buf + strlen("refs/heads/")); + die(_("A branch named '%s' already exists."), ref->buf + strlen("refs/heads/")); if (!attr_only) { const char *head; unsigned char sha1[20]; - head = resolve_ref_unsafe("HEAD", sha1, 0, NULL); + head = resolve_ref_unsafe("HEAD", 0, sha1, NULL); if (!is_bare_repository() && head && !strcmp(head, ref->buf)) - die("Cannot force update the current branch."); + die(_("Cannot force update the current branch.")); } return 1; } +static int check_tracking_branch(struct remote *remote, void *cb_data) +{ + char *tracking_branch = cb_data; + struct refspec query; + memset(&query, 0, sizeof(struct refspec)); + query.dst = tracking_branch; + return !remote_find_tracking(remote, &query); +} + +static int validate_remote_tracking_branch(char *ref) +{ + return !for_each_remote(check_tracking_branch, ref); +} + +static const char upstream_not_branch[] = +N_("Cannot setup tracking information; starting point '%s' is not a branch."); +static const char upstream_missing[] = +N_("the requested upstream branch '%s' does not exist"); +static const char upstream_advice[] = +N_("\n" +"If you are planning on basing your work on an upstream\n" +"branch that already exists at the remote, you may need to\n" +"run \"git fetch\" to retrieve it.\n" +"\n" +"If you are planning to push out a new local branch that\n" +"will track its remote counterpart, you may want to use\n" +"\"git push -u\" to set the upstream config as you push."); + void create_branch(const char *head, const char *name, const char *start_name, int force, int reflog, int clobber_head, - enum branch_track track) + int quiet, enum branch_track track) { - struct ref_lock *lock = NULL; struct commit *commit; unsigned char sha1[20]; char *real_ref, msg[PATH_MAX + 20]; @@ -215,43 +231,43 @@ void create_branch(const char *head, } real_ref = NULL; - if (get_sha1(start_name, sha1)) - die("Not a valid object name: '%s'.", start_name); + if (get_sha1(start_name, sha1)) { + if (explicit_tracking) { + if (advice_set_upstream_failure) { + error(_(upstream_missing), start_name); + advise(_(upstream_advice)); + exit(1); + } + die(_(upstream_missing), start_name); + } + die(_("Not a valid object name: '%s'."), start_name); + } switch (dwim_ref(start_name, strlen(start_name), sha1, &real_ref)) { case 0: /* Not branching from any existing branch */ if (explicit_tracking) - die("Cannot setup tracking information; starting point is not a branch."); + die(_(upstream_not_branch), start_name); break; case 1: /* Unique completion -- good, only if it is a real branch */ - if (prefixcmp(real_ref, "refs/heads/") && - prefixcmp(real_ref, "refs/remotes/")) { + if (!starts_with(real_ref, "refs/heads/") && + validate_remote_tracking_branch(real_ref)) { if (explicit_tracking) - die("Cannot setup tracking information; starting point is not a branch."); + die(_(upstream_not_branch), start_name); else real_ref = NULL; } break; default: - die("Ambiguous object name: '%s'.", start_name); + die(_("Ambiguous object name: '%s'."), start_name); break; } if ((commit = lookup_commit_reference(sha1)) == NULL) - die("Not a valid branch point: '%s'.", start_name); + die(_("Not a valid branch point: '%s'."), start_name); hashcpy(sha1, commit->object.sha1); - if (!dont_change_ref) { - lock = lock_any_ref_for_update(ref.buf, NULL, 0); - if (!lock) - die_errno("Failed to lock ref for update"); - } - - if (reflog) - log_all_ref_updates = 1; - if (forcing) snprintf(msg, sizeof msg, "branch: Reset to %s", start_name); @@ -259,12 +275,26 @@ void create_branch(const char *head, snprintf(msg, sizeof msg, "branch: Created from %s", start_name); - if (real_ref && track) - setup_tracking(ref.buf+11, real_ref, track); + if (reflog) + log_all_ref_updates = 1; + + if (!dont_change_ref) { + struct ref_transaction *transaction; + struct strbuf err = STRBUF_INIT; + + transaction = ref_transaction_begin(&err); + if (!transaction || + ref_transaction_update(transaction, ref.buf, + sha1, forcing ? NULL : null_sha1, + 0, msg, &err) || + ref_transaction_commit(transaction, &err)) + die("%s", err.buf); + ref_transaction_free(transaction); + strbuf_release(&err); + } - if (!dont_change_ref) - if (write_ref_sha1(lock, sha1, msg) < 0) - die_errno("Failed to write ref"); + if (real_ref && track) + setup_tracking(ref.buf + 11, real_ref, track, quiet); strbuf_release(&ref); free(real_ref); @@ -272,11 +302,100 @@ void create_branch(const char *head, void remove_branch_state(void) { - unlink(git_path("CHERRY_PICK_HEAD")); - unlink(git_path("REVERT_HEAD")); - unlink(git_path("MERGE_HEAD")); - unlink(git_path("MERGE_RR")); - unlink(git_path("MERGE_MSG")); - unlink(git_path("MERGE_MODE")); - unlink(git_path("SQUASH_MSG")); + unlink(git_path_cherry_pick_head()); + unlink(git_path_revert_head()); + unlink(git_path_merge_head()); + unlink(git_path_merge_rr()); + unlink(git_path_merge_msg()); + unlink(git_path_merge_mode()); + unlink(git_path_squash_msg()); +} + +static char *find_linked_symref(const char *symref, const char *branch, + const char *id) +{ + struct strbuf sb = STRBUF_INIT; + struct strbuf path = STRBUF_INIT; + struct strbuf gitdir = STRBUF_INIT; + char *existing = NULL; + + /* + * $GIT_COMMON_DIR/$symref (e.g. HEAD) is practically outside + * $GIT_DIR so resolve_ref_unsafe() won't work (it uses + * git_path). Parse the ref ourselves. + */ + if (id) + strbuf_addf(&path, "%s/worktrees/%s/%s", get_git_common_dir(), id, symref); + else + strbuf_addf(&path, "%s/%s", get_git_common_dir(), symref); + + if (!strbuf_readlink(&sb, path.buf, 0)) { + if (!starts_with(sb.buf, "refs/") || + check_refname_format(sb.buf, 0)) + goto done; + } else if (strbuf_read_file(&sb, path.buf, 0) >= 0 && + starts_with(sb.buf, "ref:")) { + strbuf_remove(&sb, 0, strlen("ref:")); + strbuf_trim(&sb); + } else + goto done; + if (strcmp(sb.buf, branch)) + goto done; + if (id) { + strbuf_reset(&path); + strbuf_addf(&path, "%s/worktrees/%s/gitdir", get_git_common_dir(), id); + if (strbuf_read_file(&gitdir, path.buf, 0) <= 0) + goto done; + strbuf_rtrim(&gitdir); + } else + strbuf_addstr(&gitdir, get_git_common_dir()); + strbuf_strip_suffix(&gitdir, ".git"); + + existing = strbuf_detach(&gitdir, NULL); +done: + strbuf_release(&path); + strbuf_release(&sb); + strbuf_release(&gitdir); + + return existing; +} + +char *find_shared_symref(const char *symref, const char *target) +{ + struct strbuf path = STRBUF_INIT; + DIR *dir; + struct dirent *d; + char *existing; + + if ((existing = find_linked_symref(symref, target, NULL))) + return existing; + + strbuf_addf(&path, "%s/worktrees", get_git_common_dir()); + dir = opendir(path.buf); + strbuf_release(&path); + if (!dir) + return NULL; + + while ((d = readdir(dir)) != NULL) { + if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, "..")) + continue; + existing = find_linked_symref(symref, target, d->d_name); + if (existing) + goto done; + } +done: + closedir(dir); + + return existing; +} + +void die_if_checked_out(const char *branch) +{ + char *existing; + + existing = find_shared_symref("HEAD", branch); + if (existing) { + skip_prefix(branch, "refs/heads/", &branch); + die(_("'%s' is already checked out at '%s'"), branch, existing); + } } |