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allow hooks to ignore their standard input stream 

Since ec7dbd145 (receive-pack: allow hooks to ignore its
standard input stream) the pre-receive and post-receive
hooks ignore SIGPIPE. Do the same for the remaining hooks
pre-push and post-rewrite, which read from standard input.
The same arguments for ignoring SIGPIPE apply.

Include test by Jeff King which checks that SIGPIPE does not
cause pre-push hook failure. With the use of git update-ref
--stdin it is fast enough to be enabled by default.

Signed-off-by: Clemens Buchacher <clemens.buchacher@intel.com>
Signed-off-by: Jeff King <peff@peff.net>
This commit is contained in:
Clemens Buchacher 2015-11-16 09:05:58 +01:00 committed by Jeff King
parent af40944bda
commit af65f68cdf
3 changed files with 26 additions and 19 deletions
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3
builtin/commit.c
View File

@ -32,6 +32,7 @@
#include "sequencer.h"
#include "notes-utils.h"
#include "mailmap.h"
#include "sigchain.h"
static const char * const builtin_commit_usage[] = {
N_("git commit [<options>] [--] <pathspec>..."),
@ -1537,8 +1538,10 @@ static int run_rewrite_hook(const unsigned char *oldsha1,
return code;
n = snprintf(buf, sizeof(buf), "%s %s\n",
sha1_to_hex(oldsha1), sha1_to_hex(newsha1));
sigchain_push(SIGPIPE, SIG_IGN);
write_in_full(proc.in, buf, n);
close(proc.in);
sigchain_pop(SIGPIPE);
return finish_command(&proc);
}

31
t/t5571-pre-push-hook.sh
View File

@ -109,23 +109,20 @@ test_expect_success 'push to URL' '
diff expected actual
'
# Test that filling pipe buffers doesn't cause failure
# Too slow to leave enabled for general use
if false
then
printf 'parent1\nrepo1\n' >expected
nr=1000
while test $nr -lt 2000
do
nr=$(( $nr + 1 ))
git branch b/$nr $COMMIT3
echo "refs/heads/b/$nr $COMMIT3 refs/heads/b/$nr $_z40" >>expected
done
test_expect_success 'set up many-ref tests' '
{
nr=1000
while test $nr -lt 2000
do
nr=$(( $nr + 1 ))
echo "create refs/heads/b/$nr $COMMIT3"
done
} | git update-ref --stdin
'
test_expect_success 'push many refs' '
git push parent1 "refs/heads/b/*:refs/heads/b/*" &&
diff expected actual
'
fi
test_expect_success 'sigpipe does not cause pre-push hook failure' '
echo "exit 0" | write_script "$HOOK" &&
git push parent1 "refs/heads/b/*:refs/heads/b/*"
'
test_done

11
transport.c
View File

@ -15,6 +15,7 @@
#include "submodule.h"
#include "string-list.h"
#include "sha1-array.h"
#include "sigchain.h"
/* rsync support */
@ -1126,6 +1127,8 @@ static int run_pre_push_hook(struct transport *transport,
return -1;
}
sigchain_push(SIGPIPE, SIG_IGN);
strbuf_init(&buf, 256);
for (r = remote_refs; r; r = r->next) {
@ -1139,8 +1142,10 @@ static int run_pre_push_hook(struct transport *transport,
r->peer_ref->name, sha1_to_hex(r->new_sha1),
r->name, sha1_to_hex(r->old_sha1));
if (write_in_full(proc.in, buf.buf, buf.len) != buf.len) {
ret = -1;
if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
/* We do not mind if a hook does not read all refs. */
if (errno != EPIPE)
ret = -1;
break;
}
}
@ -1151,6 +1156,8 @@ static int run_pre_push_hook(struct transport *transport,
if (!ret)
ret = x;
sigchain_pop(SIGPIPE);
x = finish_command(&proc);
if (!ret)
ret = x;