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authorJonathan Tan <jonathantanmy@google.com>2021-05-04 21:16:01 (GMT)
committerJunio C Hamano <gitster@pobox.com>2021-05-05 01:41:29 (GMT)
commit9c1e657a8fd26fa3ed8d13fb8c796cef8db8b124 (patch)
tree79ed7a1763a89a1be268af86dda6110a2d0c2a1a /t
parent6871d0cec62dc12d0c5f7390eee8a80614919578 (diff)
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fetch: teach independent negotiation (no packfile)
Currently, the packfile negotiation step within a Git fetch cannot be done independent of sending the packfile, even though there is at least one application wherein this is useful. Therefore, make it possible for this negotiation step to be done independently. A subsequent commit will use this for one such application - push negotiation. This feature is for protocol v2 only. (An implementation for protocol v0 would require a separate implementation in the fetch, transport, and transport helper code.) In the protocol, the main hindrance towards independent negotiation is that the server can unilaterally decide to send the packfile. This is solved by a "wait-for-done" argument: the server will then wait for the client to say "done". In practice, the client will never say it; instead it will cease requests once it is satisfied. In the client, the main change lies in the transport and transport helper code. fetch_refs_via_pack() performs everything needed - protocol version and capability checks, and the negotiation itself. There are 2 code paths that do not go through fetch_refs_via_pack() that needed to be individually excluded: the bundle transport (excluded through requiring smart_options, which the bundle transport doesn't support) and transport helpers that do not support takeover. If or when we support independent negotiation for protocol v0, we will need to modify these 2 code paths to support it. But for now, report failure if independent negotiation is requested in these cases. Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 't')
-rwxr-xr-xt/t5701-git-serve.sh2
-rwxr-xr-xt/t5702-protocol-v2.sh89
2 files changed, 90 insertions, 1 deletions
diff --git a/t/t5701-git-serve.sh b/t/t5701-git-serve.sh
index 509f379..f03bb04 100755
--- a/t/t5701-git-serve.sh
+++ b/t/t5701-git-serve.sh
@@ -16,7 +16,7 @@ test_expect_success 'test capability advertisement' '
version 2
agent=git/$(git version | cut -d" " -f3)
ls-refs=unborn
- fetch=shallow
+ fetch=shallow wait-for-done
server-option
object-format=$(test_oid algo)
0000
diff --git a/t/t5702-protocol-v2.sh b/t/t5702-protocol-v2.sh
index 2e1243c..66af411 100755
--- a/t/t5702-protocol-v2.sh
+++ b/t/t5702-protocol-v2.sh
@@ -585,6 +585,49 @@ test_expect_success 'deepen-relative' '
test_cmp expected actual
'
+setup_negotiate_only () {
+ SERVER="$1"
+ URI="$2"
+
+ rm -rf "$SERVER" client
+
+ git init "$SERVER"
+ test_commit -C "$SERVER" one
+ test_commit -C "$SERVER" two
+
+ git clone "$URI" client
+ test_commit -C client three
+}
+
+test_expect_success 'file:// --negotiate-only' '
+ SERVER="server" &&
+ URI="file://$(pwd)/server" &&
+
+ setup_negotiate_only "$SERVER" "$URI" &&
+
+ git -c protocol.version=2 -C client fetch \
+ --no-tags \
+ --negotiate-only \
+ --negotiation-tip=$(git -C client rev-parse HEAD) \
+ origin >out &&
+ COMMON=$(git -C "$SERVER" rev-parse two) &&
+ grep "$COMMON" out
+'
+
+test_expect_success 'file:// --negotiate-only with protocol v0' '
+ SERVER="server" &&
+ URI="file://$(pwd)/server" &&
+
+ setup_negotiate_only "$SERVER" "$URI" &&
+
+ test_must_fail git -c protocol.version=0 -C client fetch \
+ --no-tags \
+ --negotiate-only \
+ --negotiation-tip=$(git -C client rev-parse HEAD) \
+ origin 2>err &&
+ test_i18ngrep "negotiate-only requires protocol v2" err
+'
+
# Test protocol v2 with 'http://' transport
#
. "$TEST_DIRECTORY"/lib-httpd.sh
@@ -1035,6 +1078,52 @@ test_expect_success 'packfile-uri with transfer.fsckobjects fails when .gitmodul
test_i18ngrep "disallowed submodule name" err
'
+test_expect_success 'http:// --negotiate-only' '
+ SERVER="$HTTPD_DOCUMENT_ROOT_PATH/server" &&
+ URI="$HTTPD_URL/smart/server" &&
+
+ setup_negotiate_only "$SERVER" "$URI" &&
+
+ git -c protocol.version=2 -C client fetch \
+ --no-tags \
+ --negotiate-only \
+ --negotiation-tip=$(git -C client rev-parse HEAD) \
+ origin >out &&
+ COMMON=$(git -C "$SERVER" rev-parse two) &&
+ grep "$COMMON" out
+'
+
+test_expect_success 'http:// --negotiate-only without wait-for-done support' '
+ SERVER="server" &&
+ URI="$HTTPD_URL/one_time_perl/server" &&
+
+ setup_negotiate_only "$SERVER" "$URI" &&
+
+ echo "s/ wait-for-done/ xxxx-xxx-xxxx/" \
+ >"$HTTPD_ROOT_PATH/one-time-perl" &&
+
+ test_must_fail git -c protocol.version=2 -C client fetch \
+ --no-tags \
+ --negotiate-only \
+ --negotiation-tip=$(git -C client rev-parse HEAD) \
+ origin 2>err &&
+ test_i18ngrep "server does not support wait-for-done" err
+'
+
+test_expect_success 'http:// --negotiate-only with protocol v0' '
+ SERVER="$HTTPD_DOCUMENT_ROOT_PATH/server" &&
+ URI="$HTTPD_URL/smart/server" &&
+
+ setup_negotiate_only "$SERVER" "$URI" &&
+
+ test_must_fail git -c protocol.version=0 -C client fetch \
+ --no-tags \
+ --negotiate-only \
+ --negotiation-tip=$(git -C client rev-parse HEAD) \
+ origin 2>err &&
+ test_i18ngrep "negotiate-only requires protocol v2" err
+'
+
# DO NOT add non-httpd-specific tests here, because the last part of this
# test script is only executed when httpd is available and enabled.