Imported Upstream version 2.15.3
[platform/upstream/git.git] / branch.c
index d013374..4377ce2 100644 (file)
--- a/branch.c
+++ b/branch.c
@@ -1,9 +1,11 @@
 #include "git-compat-util.h"
 #include "cache.h"
+#include "config.h"
 #include "branch.h"
 #include "refs.h"
 #include "remote.h"
 #include "commit.h"
+#include "worktree.h"
 
 struct tracking {
        struct refspec spec;
@@ -23,8 +25,7 @@ static int find_tracked_branch(struct remote *remote, void *priv)
                } else {
                        free(tracking->spec.src);
                        if (tracking->src) {
-                               free(tracking->src);
-                               tracking->src = NULL;
+                               FREE_AND_NULL(tracking->src);
                        }
                }
                tracking->spec.src = NULL;
@@ -48,7 +49,13 @@ static int should_setup_rebase(const char *origin)
        return 0;
 }
 
-void install_branch_config(int flag, const char *local, const char *origin, const char *remote)
+static const char tracking_advice[] =
+N_("\n"
+"After fixing the error cause you may try to fix up\n"
+"the remote tracking information by invoking\n"
+"\"git branch --set-upstream-to=%s%s%s\".");
+
+int install_branch_config(int flag, const char *local, const char *origin, const char *remote)
 {
        const char *shortname = NULL;
        struct strbuf key = STRBUF_INIT;
@@ -59,20 +66,23 @@ void install_branch_config(int flag, const char *local, const char *origin, cons
            && !origin) {
                warning(_("Not setting branch %s as its own upstream."),
                        local);
-               return;
+               return 0;
        }
 
        strbuf_addf(&key, "branch.%s.remote", local);
-       git_config_set(key.buf, origin ? origin : ".");
+       if (git_config_set_gently(key.buf, origin ? origin : ".") < 0)
+               goto out_err;
 
        strbuf_reset(&key);
        strbuf_addf(&key, "branch.%s.merge", local);
-       git_config_set(key.buf, remote);
+       if (git_config_set_gently(key.buf, remote) < 0)
+               goto out_err;
 
        if (rebasing) {
                strbuf_reset(&key);
                strbuf_addf(&key, "branch.%s.rebase", local);
-               git_config_set(key.buf, "true");
+               if (git_config_set_gently(key.buf, "true") < 0)
+                       goto out_err;
        }
        strbuf_release(&key);
 
@@ -80,27 +90,40 @@ void install_branch_config(int flag, const char *local, const char *origin, cons
                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."),
+                                         _("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."),
+                                         _("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)
                                printf_ln(rebasing ?
-                                         _("Branch %s set up to track remote ref %s by rebasing.") :
-                                         _("Branch %s set up to track remote ref %s."),
+                                         _("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."),
+                                         _("Branch '%s' set up to track local ref '%s' by rebasing.") :
+                                         _("Branch '%s' set up to track local ref '%s'."),
                                          local, remote);
                }
        }
+
+       return 0;
+
+out_err:
+       strbuf_release(&key);
+       error(_("Unable to write upstream branch configuration"));
+
+       advise(_(tracking_advice),
+              origin ? origin : "",
+              origin ? "/" : "",
+              shortname ? shortname : remote);
+
+       return -1;
 }
 
 /*
@@ -108,8 +131,8 @@ void install_branch_config(int flag, const char *local, const char *origin, cons
  * to infer the settings for branch.<new_ref>.{remote,merge} from the
  * config.
  */
-static int setup_tracking(const char *new_ref, const char *orig_ref,
-                         enum branch_track track, int quiet)
+static void setup_tracking(const char *new_ref, const char *orig_ref,
+                          enum branch_track track, int quiet)
 {
        struct tracking tracking;
        int config_flags = quiet ? 0 : BRANCH_CONFIG_VERBOSE;
@@ -117,7 +140,7 @@ static int setup_tracking(const char *new_ref, const char *orig_ref,
        memset(&tracking, 0, sizeof(tracking));
        tracking.spec.dst = (char *)orig_ref;
        if (for_each_remote(find_tracked_branch, &tracking))
-               return 1;
+               return;
 
        if (!tracking.matches)
                switch (track) {
@@ -126,18 +149,18 @@ static int setup_tracking(const char *new_ref, const char *orig_ref,
                case BRANCH_TRACK_OVERRIDE:
                        break;
                default:
-                       return 1;
+                       return;
                }
 
        if (tracking.matches > 1)
-               return error(_("Not tracking: ambiguous information for ref %s"),
-                               orig_ref);
+               die(_("Not tracking: ambiguous information for ref %s"),
+                   orig_ref);
 
-       install_branch_config(config_flags, new_ref, tracking.remote,
-                             tracking.src ? tracking.src : orig_ref);
+       if (install_branch_config(config_flags, new_ref, tracking.remote,
+                             tracking.src ? tracking.src : orig_ref) < 0)
+               exit(-1);
 
        free(tracking.src);
-       return 0;
 }
 
 int read_branch_desc(struct strbuf *buf, const char *branch_name)
@@ -168,9 +191,8 @@ int validate_new_branchname(const char *name, struct strbuf *ref,
 
        if (!attr_only) {
                const char *head;
-               unsigned char sha1[20];
 
-               head = resolve_ref_unsafe("HEAD", 0, sha1, NULL);
+               head = resolve_ref_unsafe("HEAD", 0, NULL, NULL);
                if (!is_bare_repository() && head && !strcmp(head, ref->buf))
                        die(_("Cannot force update the current branch."));
        }
@@ -205,14 +227,13 @@ N_("\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,
+void create_branch(const char *name, const char *start_name,
                   int force, int reflog, int clobber_head,
                   int quiet, enum branch_track track)
 {
        struct commit *commit;
-       unsigned char sha1[20];
-       char *real_ref, msg[PATH_MAX + 20];
+       struct object_id oid;
+       char *real_ref;
        struct strbuf ref = STRBUF_INIT;
        int forcing = 0;
        int dont_change_ref = 0;
@@ -231,7 +252,7 @@ void create_branch(const char *head,
        }
 
        real_ref = NULL;
-       if (get_sha1(start_name, sha1)) {
+       if (get_oid(start_name, &oid)) {
                if (explicit_tracking) {
                        if (advice_set_upstream_failure) {
                                error(_(upstream_missing), start_name);
@@ -243,7 +264,7 @@ void create_branch(const char *head,
                die(_("Not a valid object name: '%s'."), start_name);
        }
 
-       switch (dwim_ref(start_name, strlen(start_name), sha1, &real_ref)) {
+       switch (dwim_ref(start_name, strlen(start_name), oid.hash, &real_ref)) {
        case 0:
                /* Not branching from any existing branch */
                if (explicit_tracking)
@@ -264,33 +285,33 @@ void create_branch(const char *head,
                break;
        }
 
-       if ((commit = lookup_commit_reference(sha1)) == NULL)
+       if ((commit = lookup_commit_reference(&oid)) == NULL)
                die(_("Not a valid branch point: '%s'."), start_name);
-       hashcpy(sha1, commit->object.sha1);
-
-       if (forcing)
-               snprintf(msg, sizeof msg, "branch: Reset to %s",
-                        start_name);
-       else if (!dont_change_ref)
-               snprintf(msg, sizeof msg, "branch: Created from %s",
-                        start_name);
+       oidcpy(&oid, &commit->object.oid);
 
        if (reflog)
-               log_all_ref_updates = 1;
+               log_all_ref_updates = LOG_REFS_NORMAL;
 
        if (!dont_change_ref) {
                struct ref_transaction *transaction;
                struct strbuf err = STRBUF_INIT;
+               char *msg;
+
+               if (forcing)
+                       msg = xstrfmt("branch: Reset to %s", start_name);
+               else
+                       msg = xstrfmt("branch: Created from %s", start_name);
 
                transaction = ref_transaction_begin(&err);
                if (!transaction ||
                    ref_transaction_update(transaction, ref.buf,
-                                          sha1, forcing ? NULL : null_sha1,
+                                          oid.hash, forcing ? NULL : null_sha1,
                                           0, msg, &err) ||
                    ref_transaction_commit(transaction, &err))
                        die("%s", err.buf);
                ref_transaction_free(transaction);
                strbuf_release(&err);
+               free(msg);
        }
 
        if (real_ref && track)
@@ -311,91 +332,41 @@ void remove_branch_state(void)
        unlink(git_path_squash_msg());
 }
 
-static char *find_linked_symref(const char *symref, const char *branch,
-                               const char *id)
+void die_if_checked_out(const char *branch, int ignore_current_worktree)
 {
-       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;
+       const struct worktree *wt;
+
+       wt = find_shared_symref("HEAD", branch);
+       if (!wt || (ignore_current_worktree && wt->is_current))
+               return;
+       skip_prefix(branch, "refs/heads/", &branch);
+       die(_("'%s' is already checked out at '%s'"),
+           branch, wt->path);
 }
 
-char *find_shared_symref(const char *symref, const char *target)
+int replace_each_worktree_head_symref(const char *oldref, const char *newref,
+                                     const char *logmsg)
 {
-       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);
+       int ret = 0;
+       struct worktree **worktrees = get_worktrees(0);
+       int i;
 
-       return existing;
-}
+       for (i = 0; worktrees[i]; i++) {
+               struct ref_store *refs;
 
-void die_if_checked_out(const char *branch)
-{
-       char *existing;
+               if (worktrees[i]->is_detached)
+                       continue;
+               if (!worktrees[i]->head_ref)
+                       continue;
+               if (strcmp(oldref, worktrees[i]->head_ref))
+                       continue;
 
-       existing = find_shared_symref("HEAD", branch);
-       if (existing) {
-               skip_prefix(branch, "refs/heads/", &branch);
-               die(_("'%s' is already checked out at '%s'"), branch, existing);
+               refs = get_worktree_ref_store(worktrees[i]);
+               if (refs_create_symref(refs, "HEAD", newref, logmsg))
+                       ret = error(_("HEAD of working tree %s is not updated"),
+                                   worktrees[i]->path);
        }
+
+       free_worktrees(worktrees);
+       return ret;
 }