Peel the entry, and as a side effect store the peeled value in the
entry. Use this function from two places in peel_ref(); a third
caller will be added soon.
Please note that this change can lead to ref_entries for unpacked refs
being peeled. This has no practical benefit but is harmless.
Signed-off-by: Michael Haggerty <mhagger@xxxxxxxxxxxx>
---
refs.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++++--------------
1 file changed, 49 insertions(+), 14 deletions(-)
diff --git a/refs.c b/refs.c
index 2f73189..777a4b7 100644
--- a/refs.c
+++ b/refs.c
@@ -1285,7 +1285,17 @@ enum peel_status {
PEEL_INVALID = -1,
/* object cannot be peeled because it is not a tag: */
- PEEL_NON_TAG = -2
+ PEEL_NON_TAG = -2,
+
+ /* ref_entry contains no peeled value because it is a symref: */
+ PEEL_IS_SYMREF = -3,
+
+ /*
+ * ref_entry cannot be peeled because it is broken (i.e., the
+ * symbolic reference cannot even be resolved to an object
+ * name):
+ */
+ PEEL_BROKEN = -4
};
/*
@@ -1317,31 +1327,56 @@ static enum peel_status peel_object(const unsigned char *name, unsigned char *sh
return PEEL_PEELED;
}
+/*
+ * Peel the entry (if possible) and return its new peel_status.
+ */
+static enum peel_status peel_entry(struct ref_entry *entry)
+{
+ enum peel_status status;
+
+ if (entry->flag & REF_KNOWS_PEELED)
+ return is_null_sha1(entry->u.value.peeled) ?
+ PEEL_NON_TAG : PEEL_PEELED;
+ if (entry->flag & REF_ISBROKEN)
+ return PEEL_BROKEN;
+ if (entry->flag & REF_ISSYMREF)
+ return PEEL_IS_SYMREF;
+
+ status = peel_object(entry->u.value.sha1, entry->u.value.peeled);
+ if (status == PEEL_PEELED || status == PEEL_NON_TAG)
+ entry->flag |= REF_KNOWS_PEELED;
+ return status;
+}
+
int peel_ref(const char *refname, unsigned char *sha1)
{
int flag;
unsigned char base[20];
if (current_ref && (current_ref->name == refname
- || !strcmp(current_ref->name, refname))) {
- if (current_ref->flag & REF_KNOWS_PEELED) {
- if (is_null_sha1(current_ref->u.value.peeled))
- return -1;
- hashcpy(sha1, current_ref->u.value.peeled);
- return 0;
- }
- return peel_object(current_ref->u.value.sha1, sha1);
+ || !strcmp(current_ref->name, refname))) {
+ if (peel_entry(current_ref))
+ return -1;
+ hashcpy(sha1, current_ref->u.value.peeled);
+ return 0;
}
if (read_ref_full(refname, base, 1, &flag))
return -1;
- if ((flag & REF_ISPACKED)) {
+ /*
+ * If the reference is packed, read its ref_entry from the
+ * cache in the hope that we already know its peeled value.
+ * We only try this optimization on packed references because
+ * (a) forcing the filling of the loose reference cache could
+ * be expensive and (b) loose references anyway usually do not
+ * have REF_KNOWS_PEELED.
+ */
+ if (flag & REF_ISPACKED) {
struct ref_entry *r = get_packed_ref(refname);
-
- if (r && (r->flag & REF_KNOWS_PEELED)) {
- if (is_null_sha1(r->u.value.peeled))
- return -1;
+ if (r) {
+ if (peel_entry(r))
+ return -1;
hashcpy(sha1, r->u.value.peeled);
return 0;
}
--
1.8.2.1
--
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