tests: define GIT_TEST_PROTOCOL_VERSION

Define a GIT_TEST_PROTOCOL_VERSION environment variable meant to be used
from tests. When set, this ensures protocol.version is at least the
given value, allowing the entire test suite to be run as if this
configuration is in place for all repositories.

As of this patch, all tests pass whether GIT_TEST_PROTOCOL_VERSION is
unset or set to 0. Some tests fail when GIT_TEST_PROTOCOL_VERSION is set
to 1 or 2, but this will be dealt with in subsequent patches.

This is based on work by Ævar Arnfjörð Bjarmason.

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/protocol.c b/protocol.c
index 5e636785d14f8ef5283561d4606fface080bf3c0..9741f057505d2041be1e8dbd49b444aaeab4bd82 100644 (file)
--- a/protocol.c
+++ b/protocol.c
@@ -17,6 +17,10 @@ static enum protocol_version parse_protocol_version(const char *value)
 enum protocol_version get_protocol_version_config(void)
 {
        const char *value;
+       enum protocol_version retval = protocol_v0;
+       const char *git_test_k = "GIT_TEST_PROTOCOL_VERSION";
+       const char *git_test_v = getenv(git_test_k);
+
        if (!git_config_get_string_const("protocol.version", &value)) {
                enum protocol_version version = parse_protocol_version(value);
 
@@ -24,10 +28,19 @@ enum protocol_version get_protocol_version_config(void)
                        die("unknown value for config 'protocol.version': %s",
                            value);
 
-               return version;
+               retval = version;
+       }
+
+       if (git_test_v && *git_test_v) {
+               enum protocol_version env = parse_protocol_version(git_test_v);
+
+               if (env == protocol_unknown_version)
+                       die("unknown value for %s: %s", git_test_k, git_test_v);
+               if (retval < env)
+                       retval = env;
        }
 
-       return protocol_v0;
+       return retval;
 }
 
 enum protocol_version determine_protocol_version_server(void)

diff --git a/t/README b/t/README
index 25864ec88384850342f3e6122f82470424e49953..21e941eb9453dccc0322e34e88299e7feee36cf7 100644 (file)
--- a/t/README
+++ b/t/README
@@ -327,6 +327,9 @@ marked strings" in po/README for details.
 GIT_TEST_SPLIT_INDEX=<boolean> forces split-index mode on the whole
 test suite. Accept any boolean values that are accepted by git-config.
 
+GIT_TEST_PROTOCOL_VERSION=<n>, when set, overrides the
+'protocol.version' setting to n if it is less than n.
+
 GIT_TEST_FULL_IN_PACK_ARRAY=<boolean> exercises the uncommon
 pack-objects code path where there are more than 1024 packs even if
 the actual number of packs in repository is below this limit. Accept

diff --git a/t/t5400-send-pack.sh b/t/t5400-send-pack.sh
index f1932ea431dca6d5aa2ad71575b7767413eeac18..571d620aedbac122960b319130ebad64a49d4f5b 100755 (executable)
--- a/t/t5400-send-pack.sh
+++ b/t/t5400-send-pack.sh
@@ -288,7 +288,7 @@ test_expect_success 'receive-pack de-dupes .have lines' '
        $shared .have
        EOF
 
-       GIT_TRACE_PACKET=$(pwd)/trace \
+       GIT_TRACE_PACKET=$(pwd)/trace GIT_TEST_PROTOCOL_VERSION= \
            git push \
                --receive-pack="unset GIT_TRACE_PACKET; git-receive-pack" \
                fork HEAD:foo &&

diff --git a/t/t5551-http-fetch-smart.sh b/t/t5551-http-fetch-smart.sh
index 8630b0cc39045f913987463a36388bcd72d6e248..f7a84f30035009f945d6739b2075c06e3ca15c61 100755 (executable)
--- a/t/t5551-http-fetch-smart.sh
+++ b/t/t5551-http-fetch-smart.sh
@@ -43,7 +43,8 @@ test_expect_success 'clone http repository' '
        < Cache-Control: no-cache, max-age=0, must-revalidate
        < Content-Type: application/x-git-upload-pack-result
        EOF
-       GIT_TRACE_CURL=true git clone --quiet $HTTPD_URL/smart/repo.git clone 2>err &&
+       GIT_TRACE_CURL=true GIT_TEST_PROTOCOL_VERSION= \
+               git clone --quiet $HTTPD_URL/smart/repo.git clone 2>err &&
        test_cmp file clone/file &&
        tr '\''\015'\'' Q <err |
        sed -e "