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authorJeff King <peff@peff.net>2014-08-21 12:21:20 (GMT)
committerJunio C Hamano <gitster@pobox.com>2014-08-26 19:58:02 (GMT)
commit26be19ba8d8d2e7e3e288b395e7156d5b7af5140 (patch)
treef025f721c298e2770de4419200a85758671b153b
parent4109c28e055dba27d73cefb956bea5e611f66ec0 (diff)
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send-pack: take refspecs over stdin
Pushing a large number of refs works over most transports, because we implement send-pack as an internal function. However, it can sometimes fail when pushing over http, because we have to spawn "git send-pack --stateless-rpc" to do the heavy lifting, and we pass each refspec on the command line. This can cause us to overflow the OS limits on the size of the command line for a large push. We can solve this by giving send-pack a --stdin option and using it from remote-curl. We already dealt with this on the fetch-pack side in 078b895 (fetch-pack: new --stdin option to read refs from stdin, 2012-04-02). The stdin option (and in particular, its use of packet-lines for stateless-rpc input) is modeled after that solution. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r--Documentation/git-send-pack.txt13
-rw-r--r--builtin/send-pack.c27
-rw-r--r--remote-curl.c8
-rwxr-xr-xt/t5408-send-pack-stdin.sh92
-rwxr-xr-xt/t5541-http-push-smart.sh15
5 files changed, 153 insertions, 2 deletions
diff --git a/Documentation/git-send-pack.txt b/Documentation/git-send-pack.txt
index dc3a568..2a0de42 100644
--- a/Documentation/git-send-pack.txt
+++ b/Documentation/git-send-pack.txt
@@ -35,6 +35,16 @@ OPTIONS
Instead of explicitly specifying which refs to update,
update all heads that locally exist.
+--stdin::
+ Take the list of refs from stdin, one per line. If there
+ are refs specified on the command line in addition to this
+ option, then the refs from stdin are processed after those
+ on the command line.
++
+If '--stateless-rpc' is specified together with this option then
+the list of refs must be in packet format (pkt-line). Each ref must
+be in a separate packet, and the list must end with a flush packet.
+
--dry-run::
Do everything except actually send the updates.
@@ -77,7 +87,8 @@ this flag.
Without '--all' and without any '<ref>', the heads that exist
both on the local side and on the remote side are updated.
-When one or more '<ref>' are specified explicitly, it can be either a
+When one or more '<ref>' are specified explicitly (whether on the
+command line or via `--stdin`), it can be either a
single pattern, or a pair of such pattern separated by a colon
":" (this means that a ref name cannot have a colon in it). A
single pattern '<name>' is just a shorthand for '<name>:<name>'.
diff --git a/builtin/send-pack.c b/builtin/send-pack.c
index f420b74..4b1bc0f 100644
--- a/builtin/send-pack.c
+++ b/builtin/send-pack.c
@@ -110,6 +110,7 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix)
int flags;
unsigned int reject_reasons;
int progress = -1;
+ int from_stdin = 0;
struct push_cas_option cas = {0};
argv++;
@@ -169,6 +170,10 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix)
args.stateless_rpc = 1;
continue;
}
+ if (!strcmp(arg, "--stdin")) {
+ from_stdin = 1;
+ continue;
+ }
if (!strcmp(arg, "--helper-status")) {
helper_status = 1;
continue;
@@ -201,6 +206,28 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix)
}
if (!dest)
usage(send_pack_usage);
+
+ if (from_stdin) {
+ struct argv_array all_refspecs = ARGV_ARRAY_INIT;
+
+ for (i = 0; i < nr_refspecs; i++)
+ argv_array_push(&all_refspecs, refspecs[i]);
+
+ if (args.stateless_rpc) {
+ const char *buf;
+ while ((buf = packet_read_line(0, NULL)))
+ argv_array_push(&all_refspecs, buf);
+ } else {
+ struct strbuf line = STRBUF_INIT;
+ while (strbuf_getline(&line, stdin, '\n') != EOF)
+ argv_array_push(&all_refspecs, line.buf);
+ strbuf_release(&line);
+ }
+
+ refspecs = all_refspecs.argv;
+ nr_refspecs = all_refspecs.argc;
+ }
+
/*
* --all and --mirror are incompatible; neither makes sense
* with any refspecs.
diff --git a/remote-curl.c b/remote-curl.c
index 0fcf2ce..558b9fe 100644
--- a/remote-curl.c
+++ b/remote-curl.c
@@ -863,6 +863,7 @@ static int push_git(struct discovery *heads, int nr_spec, char **specs)
int i, err;
struct argv_array args;
struct string_list_item *cas_option;
+ struct strbuf preamble = STRBUF_INIT;
argv_array_init(&args);
argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
@@ -880,17 +881,22 @@ static int push_git(struct discovery *heads, int nr_spec, char **specs)
for_each_string_list_item(cas_option, &cas_options)
argv_array_push(&args, cas_option->string);
argv_array_push(&args, url.buf);
+
+ argv_array_push(&args, "--stdin");
for (i = 0; i < nr_spec; i++)
- argv_array_push(&args, specs[i]);
+ packet_buf_write(&preamble, "%s\n", specs[i]);
+ packet_buf_flush(&preamble);
memset(&rpc, 0, sizeof(rpc));
rpc.service_name = "git-receive-pack",
rpc.argv = args.argv;
+ rpc.stdin_preamble = &preamble;
err = rpc_service(&rpc, heads);
if (rpc.result.len)
write_or_die(1, rpc.result.buf, rpc.result.len);
strbuf_release(&rpc.result);
+ strbuf_release(&preamble);
argv_array_clear(&args);
return err;
}
diff --git a/t/t5408-send-pack-stdin.sh b/t/t5408-send-pack-stdin.sh
new file mode 100755
index 0000000..e8737df
--- /dev/null
+++ b/t/t5408-send-pack-stdin.sh
@@ -0,0 +1,92 @@
+#!/bin/sh
+
+test_description='send-pack --stdin tests'
+. ./test-lib.sh
+
+create_ref () {
+ tree=$(git write-tree) &&
+ test_tick &&
+ commit=$(echo "$1" | git commit-tree $tree) &&
+ git update-ref "$1" $commit
+}
+
+clear_remote () {
+ rm -rf remote.git &&
+ git init --bare remote.git
+}
+
+verify_push () {
+ git rev-parse "$1" >expect &&
+ git --git-dir=remote.git rev-parse "${2:-$1}" >actual &&
+ test_cmp expect actual
+}
+
+test_expect_success 'setup refs' '
+ cat >refs <<-\EOF &&
+ refs/heads/A
+ refs/heads/C
+ refs/tags/D
+ refs/heads/B
+ refs/tags/E
+ EOF
+ for i in $(cat refs); do
+ create_ref $i || return 1
+ done
+'
+
+# sanity check our setup
+test_expect_success 'refs on cmdline' '
+ clear_remote &&
+ git send-pack remote.git $(cat refs) &&
+ for i in $(cat refs); do
+ verify_push $i || return 1
+ done
+'
+
+test_expect_success 'refs over stdin' '
+ clear_remote &&
+ git send-pack remote.git --stdin <refs &&
+ for i in $(cat refs); do
+ verify_push $i || return 1
+ done
+'
+
+test_expect_success 'stdin lines are full refspecs' '
+ clear_remote &&
+ echo "A:other" >input &&
+ git send-pack remote.git --stdin <input &&
+ verify_push refs/heads/A refs/heads/other
+'
+
+test_expect_success 'stdin mixed with cmdline' '
+ clear_remote &&
+ echo A >input &&
+ git send-pack remote.git --stdin B <input &&
+ verify_push A &&
+ verify_push B
+'
+
+test_expect_success 'cmdline refs written in order' '
+ clear_remote &&
+ test_must_fail git send-pack remote.git A:foo B:foo &&
+ verify_push A foo
+'
+
+test_expect_success '--stdin refs come after cmdline' '
+ clear_remote &&
+ echo A:foo >input &&
+ test_must_fail git send-pack remote.git --stdin B:foo <input &&
+ verify_push B foo
+'
+
+test_expect_success 'refspecs and --mirror do not mix (cmdline)' '
+ clear_remote &&
+ test_must_fail git send-pack remote.git --mirror $(cat refs)
+'
+
+test_expect_success 'refspecs and --mirror do not mix (stdin)' '
+ clear_remote &&
+ test_must_fail git send-pack remote.git --mirror --stdin <refs
+'
+
+test_done
diff --git a/t/t5541-http-push-smart.sh b/t/t5541-http-push-smart.sh
index 73af16f..db19988 100755
--- a/t/t5541-http-push-smart.sh
+++ b/t/t5541-http-push-smart.sh
@@ -323,5 +323,20 @@ test_expect_success 'push into half-auth-complete requires password' '
test_cmp expect actual
'
+run_with_limited_cmdline () {
+ (ulimit -s 128 && "$@")
+}
+
+test_lazy_prereq CMDLINE_LIMIT 'run_with_limited_cmdline true'
+
+test_expect_success CMDLINE_LIMIT 'push 2000 tags over http' '
+ sha1=$(git rev-parse HEAD) &&
+ test_seq 2000 |
+ sort |
+ sed "s|.*|$sha1 refs/tags/really-long-tag-name-&|" \
+ >.git/packed-refs &&
+ run_with_limited_cmdline git push --mirror
+'
+
stop_httpd
test_done