When a remote helper crashes while pushing we should revert back to the
state before the push, however, it's possible that `git fast-export`
already finished its job, and therefore has exported the marks already.
This creates a synchronization problem because from that moment on
`git fast-{import,export}` will have marks that the remote helper is not
aware of and all further commands fail (if those marks are referenced).
The fix is to tell `git fast-export` to export to a temporary file, and
only after the remote helper has finishes successfully, move to the
final destination.
Signed-off-by: Felipe Contreras <felipe.contreras@xxxxxxxxx>
---
t/t5801-remote-helpers.sh | 17 ++++++++++++++++-
transport-helper.c | 13 +++++++++++--
2 files changed, 27 insertions(+), 3 deletions(-)
diff --git a/t/t5801-remote-helpers.sh b/t/t5801-remote-helpers.sh
index 613f69a..cf7fd43 100755
--- a/t/t5801-remote-helpers.sh
+++ b/t/t5801-remote-helpers.sh
@@ -207,6 +207,17 @@ test_expect_success 'push update refs failure' '
)
'
+clean_mark () {
+ cut -f 2 -d ' ' $1 | git cat-file --batch-check | grep commit | sort > $(basename $1)
+}
+
+cmp_marks () {
+ test_when_finished "rm -rf git.marks testgit.marks" &&
+ clean_mark .git/testgit/$1/git.marks &&
+ clean_mark .git/testgit/$1/testgit.marks &&
+ test_cmp git.marks testgit.marks
+}
+
test_expect_success 'proper failure checks for fetching' '
(GIT_REMOTE_TESTGIT_FAILURE=1 &&
export GIT_REMOTE_TESTGIT_FAILURE &&
@@ -221,7 +232,11 @@ test_expect_success 'proper failure checks for pushing' '
(GIT_REMOTE_TESTGIT_FAILURE=1 &&
export GIT_REMOTE_TESTGIT_FAILURE &&
cd local &&
- test_must_fail git push --all
+ git checkout -b crash master &&
+ echo crash >> file &&
+ git commit -a -m crash &&
+ test_must_fail git push --all &&
+ cmp_marks origin
)
'
diff --git a/transport-helper.c b/transport-helper.c
index 2747f98..090c863 100644
--- a/transport-helper.c
+++ b/transport-helper.c
@@ -434,7 +434,7 @@ static int get_exporter(struct transport *transport,
fastexport->argv[argc++] = data->signed_tags ?
"--signed-tags=verbatim" : "--signed-tags=warn-strip";
if (data->export_marks) {
- strbuf_addf(&tmp, "--export-marks=%s", data->export_marks);
+ strbuf_addf(&tmp, "--export-marks=%s.tmp", data->export_marks);
fastexport->argv[argc++] = strbuf_detach(&tmp, NULL);
}
if (data->import_marks) {
@@ -901,7 +901,16 @@ static int push_refs_with_export(struct transport *transport,
if (finish_command(&exporter))
die("Error while running fast-export");
- return push_update_refs_status(data, remote_refs);
+ if (push_update_refs_status(data, remote_refs))
+ return 1;
+
+ if (data->export_marks) {
+ strbuf_addf(&buf, "%s.tmp", data->export_marks);
+ rename(buf.buf, data->export_marks);
+ strbuf_release(&buf);
+ }
+
+ return 0;
}
static int push_refs(struct transport *transport,
--
1.9.1+fc3.9.gc73078e
--
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