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authorLibravatar Simão Afonso <simao.afonso@powertools-tech.com>2020-11-25 18:31:23 +0000
committerLibravatar Junio C Hamano <gitster@pobox.com>2020-11-25 12:30:18 -0800
commitdf7f915fb6fb28ea5a1e3103251c251e53a80b1b (patch)
tree45236873cfb3b934ff3d7d44d42451fe65c27963
parentSeventh batch (diff)
downloadtgif-df7f915fb6fb28ea5a1e3103251c251e53a80b1b.tar.xz
crendential-store: use timeout when locking file
When holding the lock for rewriting the credential file, use a timeout to avoid race conditions when the credentials file needs to be updated in parallel. An example would be doing `fetch --all` on a repository with several remotes that need credentials, using parallel fetching. The timeout can be configured using "credentialStore.lockTimeoutMS", defaulting to 1 second. Signed-off-by: Simão Afonso <simao.afonso@powertools-tech.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r--Documentation/config/credential.txt6
-rw-r--r--builtin/credential-store.c8
2 files changed, 12 insertions, 2 deletions
diff --git a/Documentation/config/credential.txt b/Documentation/config/credential.txt
index 9d01641c28..512f31876e 100644
--- a/Documentation/config/credential.txt
+++ b/Documentation/config/credential.txt
@@ -28,3 +28,9 @@ credential.<url>.*::
credentialCache.ignoreSIGHUP::
Tell git-credential-cache--daemon to ignore SIGHUP, instead of quitting.
+
+credentialStore.lockTimeoutMS::
+ The length of time, in milliseconds, for git-credential-store to retry
+ when trying to lock the credentials file. Value 0 means not to retry at
+ all; -1 means to try indefinitely. Default is 1000 (i.e., retry for
+ 1s).
diff --git a/builtin/credential-store.c b/builtin/credential-store.c
index 5331ab151a..ae3c1ba75f 100644
--- a/builtin/credential-store.c
+++ b/builtin/credential-store.c
@@ -1,4 +1,5 @@
#include "builtin.h"
+#include "config.h"
#include "lockfile.h"
#include "credential.h"
#include "string-list.h"
@@ -58,8 +59,11 @@ static void print_line(struct strbuf *buf)
static void rewrite_credential_file(const char *fn, struct credential *c,
struct strbuf *extra)
{
- if (hold_lock_file_for_update(&credential_lock, fn, 0) < 0)
- die_errno("unable to get credential storage lock");
+ int timeout_ms = 1000;
+
+ git_config_get_int("credentialstore.locktimeoutms", &timeout_ms);
+ if (hold_lock_file_for_update_timeout(&credential_lock, fn, 0, timeout_ms) < 0)
+ die_errno(_("unable to get credential storage lock in %d ms"), timeout_ms);
if (extra)
print_line(extra);
parse_credential_file(fn, c, NULL, print_line);