Hi Junio,
I believe we have finalized the discussion on this patch. Please apply
On Fri, Nov 13, 2015 at 06:23:20PM -0500, Jeff King wrote:
>
> > +test_expect_success 'filling pipe buffer does not cause failure' '
> > + git push parent1 "refs/heads/b/*:refs/heads/b/*" &&
> > + test_cmp expected actual
> > +'
>
> It actually _does_ read all of the input, but I guess is making sure we
> call write() in a loop. I don't know if this is even worth keeping.
>
> Can you think of a good reason that it is checking something
> interesting?
No, I also cannot think of a good reason to keep it. Here is the patch
with the test above removed.
Best regards,
Clemens
--o<--
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@xxxxxxxxx>
---
builtin/commit.c | 3 +++
t/t5571-pre-push-hook.sh | 33 +++++++++++++++------------------
transport.c | 11 +++++++++--
3 files changed, 27 insertions(+), 20 deletions(-)
diff --git a/builtin/commit.c b/builtin/commit.c
index dca09e2..f2a8b78 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -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);
}
diff --git a/t/t5571-pre-push-hook.sh b/t/t5571-pre-push-hook.sh
index 6f9916a..ba975bb 100755
--- a/t/t5571-pre-push-hook.sh
+++ b/t/t5571-pre-push-hook.sh
@@ -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 'push many refs' '
- git push parent1 "refs/heads/b/*:refs/heads/b/*" &&
- diff expected actual
- '
-fi
+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 $COMMIT3"
+ done
+ } | git update-ref --stdin
+'
+
+test_expect_success 'sigpipe does not cause pre-push hook failure' '
+ echo "exit 0" | write_script "$HOOK" &&
+ git push parent1 "refs/heads/b/*:refs/heads/b/*"
+'
test_done
diff --git a/transport.c b/transport.c
index 23b2ed6..e34ab92 100644
--- a/transport.c
+++ b/transport.c
@@ -15,6 +15,7 @@
#include "submodule.h"
#include "string-list.h"
#include "sha1-array.h"
+#include "sigchain.h"
/* rsync support */
@@ -1127,6 +1128,8 @@ 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) {
@@ -1140,8 +1143,10 @@ 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;
}
}
@@ -1152,6 +1157,8 @@ static int run_pre_push_hook(struct transport *transport,
if (!ret)
ret = x;
+ sigchain_pop(SIGPIPE);
+
x = finish_command(&proc);
if (!ret)
ret = x;
--
1.9.4
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