refs.c: make ref_transaction_begin take an err argument

Add an err argument to _begin so that on non-fatal failures in future ref
backends we can report a nice error back to the caller.
While _begin can currently never fail for other reasons than OOM, in which
case we die() anyway, we may add other types of backends in the future.
For example, a hypothetical MySQL backend could fail in _begin with
"Can not connect to MySQL server. No route to host".

Signed-off-by: Ronnie Sahlberg <sahlberg@google.com>
Reviewed-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ronnie Sahlberg 2014-05-19 10:42:34 -07:00 committed by Junio C Hamano
parent 8c8bdc0d35
commit 93a644ea9d
3 changed files with 6 additions and 3 deletions

View File

@ -365,7 +365,9 @@ int cmd_update_ref(int argc, const char **argv, const char *prefix)
die("Refusing to perform update with empty message.");
if (read_stdin) {
transaction = ref_transaction_begin();
transaction = ref_transaction_begin(&err);
if (!transaction)
die("%s", err.buf);
if (delete || no_deref || argc > 0)
usage_with_options(git_update_ref_usage, options);
if (end_null)
@ -374,6 +376,7 @@ int cmd_update_ref(int argc, const char **argv, const char *prefix)
if (ref_transaction_commit(transaction, msg, &err))
die("%s", err.buf);
ref_transaction_free(transaction);
strbuf_release(&err);
return 0;
}

2
refs.c
View File

@ -3397,7 +3397,7 @@ struct ref_transaction {
size_t nr;
};
struct ref_transaction *ref_transaction_begin(void)
struct ref_transaction *ref_transaction_begin(struct strbuf *err)
{
return xcalloc(1, sizeof(struct ref_transaction));
}

2
refs.h
View File

@ -262,7 +262,7 @@ enum action_on_err {
* Begin a reference transaction. The reference transaction must
* be freed by calling ref_transaction_free().
*/
struct ref_transaction *ref_transaction_begin(void);
struct ref_transaction *ref_transaction_begin(struct strbuf *err);
/*
* The following functions add a reference check or update to a