refs: extract a function write_packed_entry()

Extract the I/O code from the "business logic" in repack_ref_fn().
Later there will be another caller for this function.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/refs.c b/refs.c
index 6032ba62c74d30b2621f11542038ef6308c526e9..e09c0457af2bf89a4530a39d2ba64f2db5fd1adb 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -1959,12 +1959,36 @@ struct ref_lock *lock_any_ref_for_update(const char *refname,
        return lock_ref_sha1_basic(refname, old_sha1, flags, NULL);
 }
 
-static int repack_ref_fn(struct ref_entry *entry, void *cb_data)
+/*
+ * Write an entry to the packed-refs file for the specified refname.
+ * If peeled is non-NULL, write it as the entry's peeled value.
+ */
+static void write_packed_entry(int fd, char *refname, unsigned char *sha1,
+                              unsigned char *peeled)
 {
-       int *fd = cb_data;
        char line[PATH_MAX + 100];
        int len;
 
+       len = snprintf(line, sizeof(line), "%s %s\n",
+                      sha1_to_hex(sha1), refname);
+       /* this should not happen but just being defensive */
+       if (len > sizeof(line))
+               die("too long a refname '%s'", refname);
+       write_or_die(fd, line, len);
+
+       if (peeled) {
+               if (snprintf(line, sizeof(line), "^%s\n",
+                            sha1_to_hex(peeled)) != PEELED_LINE_LENGTH)
+                       die("internal error");
+               write_or_die(fd, line, PEELED_LINE_LENGTH);
+       }
+}
+
+static int repack_ref_fn(struct ref_entry *entry, void *cb_data)
+{
+       int *fd = cb_data;
+       enum peel_status peel_status;
+
        if (entry->flag & REF_ISBROKEN) {
                /* This shouldn't happen to packed refs. */
                error("%s is broken!", entry->name);
@@ -2000,20 +2024,10 @@ static int repack_ref_fn(struct ref_entry *entry, void *cb_data)
                return 0;
        }
 
-       len = snprintf(line, sizeof(line), "%s %s\n",
-                      sha1_to_hex(entry->u.value.sha1), entry->name);
-       /* this should not happen but just being defensive */
-       if (len > sizeof(line))
-               die("too long a refname '%s'", entry->name);
-       write_or_die(*fd, line, len);
-       if (!peel_entry(entry)) {
-               /* This reference could be peeled; write the peeled value: */
-               if (snprintf(line, sizeof(line), "^%s\n",
-                            sha1_to_hex(entry->u.value.peeled)) !=
-                   PEELED_LINE_LENGTH)
-                       die("internal error");
-               write_or_die(*fd, line, PEELED_LINE_LENGTH);
-       }
+       peel_status = peel_entry(entry);
+       write_packed_entry(*fd, entry->name, entry->u.value.sha1,
+                          peel_status == PEEL_PEELED ?
+                          entry->u.value.peeled : NULL);
 
        return 0;
 }