Change ref_transaction_commit so that it does not free the transaction.
Instead require that a caller will end a transaction by either calling
ref_transaction_rollback or ref_transaction_free.
By having the transaction object remaining valid after _commit returns allows
us to write much nicer code and still be able to call ref_transaction_rollback
safely. Instead of this horribleness
t = ref_transaction_begin();
if ((!t ||
ref_transaction_update(t, refname, sha1, oldval, flags,
!!oldval)) ||
(ref_transaction_commit(t, action, &err) && !(t = NULL))) {
ref_transaction_rollback(t);
we can now just do the much nicer
t = ref_transaction_begin();
if (!t ||
ref_transaction_update(t, refname, sha1, oldval, flags,
!!oldval) ||
ref_transaction_commit(&t, action, &err)) {
ref_transaction_rollback(t);
... die/return ...
ref_transaction_free(transaction);
Signed-off-by: Ronnie Sahlberg <sahlberg@xxxxxxxxxx>
---
branch.c | 1 +
builtin/commit.c | 1 +
builtin/replace.c | 1 +
builtin/tag.c | 1 +
builtin/update-ref.c | 1 +
fast-import.c | 4 ++--
refs.c | 14 ++++++--------
refs.h | 14 +++++++++-----
sequencer.c | 4 ++--
9 files changed, 24 insertions(+), 17 deletions(-)
diff --git a/branch.c b/branch.c
index 8bf7588..f78a28b 100644
--- a/branch.c
+++ b/branch.c
@@ -304,6 +304,7 @@ void create_branch(const char *head,
null_sha1, 0, !forcing, &err) ||
ref_transaction_commit(transaction, msg, &err))
die("%s", err.buf);
+ ref_transaction_free(transaction);
}
if (real_ref && track)
diff --git a/builtin/commit.c b/builtin/commit.c
index c429216..6b888f2 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -1726,6 +1726,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
rollback_index_files();
die("%s", err.buf);
}
+ ref_transaction_free(transaction);
unlink(git_path("CHERRY_PICK_HEAD"));
unlink(git_path("REVERT_HEAD"));
diff --git a/builtin/replace.c b/builtin/replace.c
index e8932cd..af7f72d 100644
--- a/builtin/replace.c
+++ b/builtin/replace.c
@@ -164,6 +164,7 @@ static int replace_object_sha1(const char *object_ref,
ref_transaction_commit(transaction, NULL, &err))
die("%s", err.buf);
+ ref_transaction_free(transaction);
return 0;
}
diff --git a/builtin/tag.c b/builtin/tag.c
index b05f9a5..30b471c 100644
--- a/builtin/tag.c
+++ b/builtin/tag.c
@@ -708,6 +708,7 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
0, !is_null_sha1(prev), &err) ||
ref_transaction_commit(transaction, NULL, &err))
die("%s", err.buf);
+ ref_transaction_free(transaction);
if (force && !is_null_sha1(prev) && hashcmp(prev, object))
printf(_("Updated tag '%s' (was %s)\n"), tag, find_unique_abbrev(prev, DEFAULT_ABBREV));
diff --git a/builtin/update-ref.c b/builtin/update-ref.c
index cdb71a8..4c2145e 100644
--- a/builtin/update-ref.c
+++ b/builtin/update-ref.c
@@ -373,6 +373,7 @@ int cmd_update_ref(int argc, const char **argv, const char *prefix)
update_refs_stdin();
if (ref_transaction_commit(transaction, msg, &err))
die("%s", err.buf);
+ ref_transaction_free(transaction);
return 0;
}
diff --git a/fast-import.c b/fast-import.c
index bac799c..6b186ce 100644
--- a/fast-import.c
+++ b/fast-import.c
@@ -1710,13 +1710,13 @@ static int update_branch(struct branch *b)
if (!transaction ||
ref_transaction_update(transaction, b->name, b->sha1, old_sha1,
0, 1, &err) ||
- (ref_transaction_commit(transaction, msg, &err) &&
- !(transaction = NULL))) {
+ ref_transaction_commit(transaction, msg, &err)) {
ref_transaction_rollback(transaction);
error("%s", err.buf);
strbuf_release(&err);
return -1;
}
+ ref_transaction_free(transaction);
return 0;
}
diff --git a/refs.c b/refs.c
index b4c7d04..016206b 100644
--- a/refs.c
+++ b/refs.c
@@ -3350,7 +3350,7 @@ struct ref_transaction *ref_transaction_begin(void)
return xcalloc(1, sizeof(struct ref_transaction));
}
-static void ref_transaction_free(struct ref_transaction *transaction)
+void ref_transaction_free(struct ref_transaction *transaction)
{
int i;
@@ -3451,10 +3451,10 @@ int update_ref(const char *action, const char *refname,
struct strbuf err = STRBUF_INIT;
t = ref_transaction_begin();
- if ((!t ||
+ if (!t ||
ref_transaction_update(t, refname, sha1, oldval, flags,
- !!oldval, &err)) ||
- (ref_transaction_commit(t, action, &err) && !(t = NULL))) {
+ !!oldval, &err) ||
+ ref_transaction_commit(t, action, &err)) {
const char *str = "update_ref failed for ref '%s': %s";
ref_transaction_rollback(t);
@@ -3468,6 +3468,7 @@ int update_ref(const char *action, const char *refname,
strbuf_release(&err);
return 1;
}
+ ref_transaction_free(t);
return 0;
}
@@ -3502,10 +3503,8 @@ int ref_transaction_commit(struct ref_transaction *transaction,
int n = transaction->nr;
struct ref_update **updates = transaction->updates;
- if (!n) {
- ref_transaction_free(transaction);
+ if (!n)
return 0;
- }
/* Allocate work space */
delnames = xmalloc(sizeof(*delnames) * n);
@@ -3572,7 +3571,6 @@ cleanup:
if (updates[i]->lock)
unlock_ref(updates[i]->lock);
free(delnames);
- ref_transaction_free(transaction);
return ret;
}
diff --git a/refs.h b/refs.h
index 2c2e694..608ca10 100644
--- a/refs.h
+++ b/refs.h
@@ -216,8 +216,8 @@ enum action_on_err {
/*
* Begin a reference transaction. The reference transaction must
- * eventually be commited using ref_transaction_commit() or rolled
- * back using ref_transaction_rollback().
+ * eventually be freed by either calling ref_transaction_rollback()
+ * or ref_transaction_free().
*/
struct ref_transaction *ref_transaction_begin(void);
@@ -285,13 +285,17 @@ int ref_transaction_delete(struct ref_transaction *transaction,
/*
* Commit all of the changes that have been queued in transaction, as
* atomically as possible. Return a nonzero value if there is a
- * problem. The ref_transaction is freed by this function.
- * If err is non-NULL we will add an error string to it to explain why
- * the transaction failed. The string does not end in newline.
+ * problem. If err is non-NULL we will add an error string to it to explain
+ * why the transaction failed. The string does not end in newline.
*/
int ref_transaction_commit(struct ref_transaction *transaction,
const char *msg, struct strbuf *err);
+/*
+ * Free an existing transaction.
+ */
+void ref_transaction_free(struct ref_transaction *transaction);
+
/** Lock a ref and then write its file */
int update_ref(const char *action, const char *refname,
const unsigned char *sha1, const unsigned char *oldval,
diff --git a/sequencer.c b/sequencer.c
index e6b3bbc..f6f1536 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -286,14 +286,14 @@ static int fast_forward_to(const unsigned char *to, const unsigned char *from,
if (!transaction ||
ref_transaction_update(transaction, "HEAD", to, from,
0, !unborn, &err) ||
- (ref_transaction_commit(transaction, sb.buf, &err) &&
- !(transaction = NULL))) {
+ ref_transaction_commit(transaction, sb.buf, &err)) {
ref_transaction_rollback(transaction);
error("%s", err.buf);
strbuf_release(&sb);
strbuf_release(&err);
return -1;
}
+ ref_transaction_free(transaction);
strbuf_release(&sb);
return 0;
--
2.0.0.rc3.477.gffe78a2
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