Re: [PATCH v8 15/44] commit.c: use ref transactions for updates

2014-05-15 Thread Jonathan Nieder
Ronnie Sahlberg wrote:

> Change commit.c to use ref transactions for all ref updates.
> Make sure we pass a NULL pointer to ref_transaction_update if have_old
> is false.

Once ref_transaction_begin() and ref_transaction_update() set err,
this will always have a reasonable message to print in die().

Reviewed-by: Jonathan Nieder 
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[PATCH v8 15/44] commit.c: use ref transactions for updates

2014-05-15 Thread Ronnie Sahlberg
Change commit.c to use ref transactions for all ref updates.
Make sure we pass a NULL pointer to ref_transaction_update if have_old
is false.

Signed-off-by: Ronnie Sahlberg 
---
 builtin/commit.c | 23 ++-
 1 file changed, 10 insertions(+), 13 deletions(-)

diff --git a/builtin/commit.c b/builtin/commit.c
index d28505a..592f019 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -1581,11 +1581,12 @@ int cmd_commit(int argc, const char **argv, const char 
*prefix)
const char *index_file, *reflog_msg;
char *nl;
unsigned char sha1[20];
-   struct ref_lock *ref_lock;
struct commit_list *parents = NULL, **pptr = &parents;
struct stat statbuf;
struct commit *current_head = NULL;
struct commit_extra_header *extra = NULL;
+   struct ref_transaction *transaction;
+   struct strbuf err = STRBUF_INIT;
 
if (argc == 2 && !strcmp(argv[1], "-h"))
usage_with_options(builtin_commit_usage, 
builtin_commit_options);
@@ -1707,16 +1708,6 @@ int cmd_commit(int argc, const char **argv, const char 
*prefix)
strbuf_release(&author_ident);
free_commit_extra_headers(extra);
 
-   ref_lock = lock_any_ref_for_update("HEAD",
-  !current_head
-  ? NULL
-  : current_head->object.sha1,
-  0, NULL);
-   if (!ref_lock) {
-   rollback_index_files();
-   die(_("cannot lock HEAD ref"));
-   }
-
nl = strchr(sb.buf, '\n');
if (nl)
strbuf_setlen(&sb, nl + 1 - sb.buf);
@@ -1725,9 +1716,15 @@ int cmd_commit(int argc, const char **argv, const char 
*prefix)
strbuf_insert(&sb, 0, reflog_msg, strlen(reflog_msg));
strbuf_insert(&sb, strlen(reflog_msg), ": ", 2);
 
-   if (write_ref_sha1(ref_lock, sha1, sb.buf) < 0) {
+   transaction = ref_transaction_begin();
+   if (!transaction ||
+   ref_transaction_update(transaction, "HEAD", sha1,
+  current_head ?
+  current_head->object.sha1 : NULL,
+  0, !!current_head) ||
+   ref_transaction_commit(transaction, sb.buf, &err)) {
rollback_index_files();
-   die(_("cannot update HEAD ref"));
+   die("%s", err.buf);
}
 
unlink(git_path("CHERRY_PICK_HEAD"));
-- 
2.0.0.rc3.477.g0f8edf7

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