Merge branch 'rs/no-null-ptr-arith-in-fast-export'

diff --git a/branch.c b/branch.c
index 4377ce2fb17d7467ee92d4db02cb4859f6397505..2672054f0b5423cd09010302285935650435f1dc 100644 (file)
--- a/branch.c
+++ b/branch.c
@@ -178,24 +178,40 @@ int read_branch_desc(struct strbuf *buf, const char *branch_name)
        return 0;
 }
 
-int validate_new_branchname(const char *name, struct strbuf *ref,
-                           int force, int attr_only)
+/*
+ * Check if 'name' can be a valid name for a branch; die otherwise.
+ * Return 1 if the named branch already exists; return 0 otherwise.
+ * Fill ref with the full refname for the branch.
+ */
+int validate_branchname(const char *name, struct strbuf *ref)
 {
        if (strbuf_check_branch_ref(ref, name))
                die(_("'%s' is not a valid branch name."), name);
 
-       if (!ref_exists(ref->buf))
+       return ref_exists(ref->buf);
+}
+
+/*
+ * Check if a branch 'name' can be created as a new branch; die otherwise.
+ * 'force' can be used when it is OK for the named branch already exists.
+ * Return 1 if the named branch already exists; return 0 otherwise.
+ * Fill ref with the full refname for the branch.
+ */
+int validate_new_branchname(const char *name, struct strbuf *ref, int force)
+{
+       const char *head;
+
+       if (!validate_branchname(name, ref))
                return 0;
-       else if (!force && !attr_only)
-               die(_("A branch named '%s' already exists."), ref->buf + strlen("refs/heads/"));
 
-       if (!attr_only) {
-               const char *head;
+       if (!force)
+               die(_("A branch named '%s' already exists."),
+                   ref->buf + strlen("refs/heads/"));
+
+       head = resolve_ref_unsafe("HEAD", 0, NULL, NULL);
+       if (!is_bare_repository() && head && !strcmp(head, ref->buf))
+               die(_("Cannot force update the current branch."));
 
-               head = resolve_ref_unsafe("HEAD", 0, NULL, NULL);
-               if (!is_bare_repository() && head && !strcmp(head, ref->buf))
-                       die(_("Cannot force update the current branch."));
-       }
        return 1;
 }
 
@@ -228,7 +244,7 @@ N_("\n"
 "\"git push -u\" to set the upstream config as you push.");
 
 void create_branch(const char *name, const char *start_name,
-                  int force, int reflog, int clobber_head,
+                  int force, int clobber_head_ok, int reflog,
                   int quiet, enum branch_track track)
 {
        struct commit *commit;
@@ -242,9 +258,9 @@ void create_branch(const char *name, const char *start_name,
        if (track == BRANCH_TRACK_EXPLICIT || track == BRANCH_TRACK_OVERRIDE)
                explicit_tracking = 1;
 
-       if (validate_new_branchname(name, &ref, force,
-                                   track == BRANCH_TRACK_OVERRIDE ||
-                                   clobber_head)) {
+       if ((track == BRANCH_TRACK_OVERRIDE || clobber_head_ok)
+           ? validate_branchname(name, &ref)
+           : validate_new_branchname(name, &ref, force)) {
                if (!force)
                        dont_change_ref = 1;
                else
@@ -264,7 +280,7 @@ void create_branch(const char *name, const char *start_name,
                die(_("Not a valid object name: '%s'."), start_name);
        }
 
-       switch (dwim_ref(start_name, strlen(start_name), oid.hash, &real_ref)) {
+       switch (dwim_ref(start_name, strlen(start_name), &oid, &real_ref)) {
        case 0:
                /* Not branching from any existing branch */
                if (explicit_tracking)
@@ -305,7 +321,7 @@ void create_branch(const char *name, const char *start_name,
                transaction = ref_transaction_begin(&err);
                if (!transaction ||
                    ref_transaction_update(transaction, ref.buf,
-                                          oid.hash, forcing ? NULL : null_sha1,
+                                          &oid, forcing ? NULL : &null_oid,
                                           0, msg, &err) ||
                    ref_transaction_commit(transaction, &err))
                        die("%s", err.buf);