git/t/t5700-protocol-v1.sh
Jonathan Tan dccea605b6 clone: support unusual remote ref configurations
When cloning a branchless and tagless but not refless remote using
protocol v0 or v1, Git calls transport_fetch_refs() with an empty ref
list. This makes the clone fail with the message "remote transport
reported error".

Git should have refrained from calling transport_fetch_refs(), just like
it does in the case that the remote is refless. Therefore, teach Git to
do this.

In protocol v2, this does not happen because the client passes
ref-prefix arguments that filter out non-branches and non-tags in the
ref advertisement, making the remote appear empty.

Note that this bug concerns logic in builtin/clone.c and only affects
cloning, not fetching.

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-01-26 11:12:19 -08:00

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#!/bin/sh
test_description='test git wire-protocol transition'
TEST_NO_CREATE_REPO=1
# This is a protocol-specific test.
GIT_TEST_PROTOCOL_VERSION=0
export GIT_TEST_PROTOCOL_VERSION
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
. ./test-lib.sh
# Test protocol v1 with 'git://' transport
#
. "$TEST_DIRECTORY"/lib-git-daemon.sh
start_git_daemon --export-all --enable=receive-pack
daemon_parent=$GIT_DAEMON_DOCUMENT_ROOT_PATH/parent
test_expect_success 'create repo to be served by git-daemon' '
git init "$daemon_parent" &&
test_commit -C "$daemon_parent" one
'
test_expect_success 'clone with git:// using protocol v1' '
GIT_TRACE_PACKET=1 git -c protocol.version=1 \
clone "$GIT_DAEMON_URL/parent" daemon_child 2>log &&
git -C daemon_child log -1 --format=%s >actual &&
git -C "$daemon_parent" log -1 --format=%s >expect &&
test_cmp expect actual &&
# Client requested to use protocol v1
grep "clone> .*\\\0\\\0version=1\\\0$" log &&
# Server responded using protocol v1
grep "clone< version 1" log
'
test_expect_success 'fetch with git:// using protocol v1' '
test_commit -C "$daemon_parent" two &&
GIT_TRACE_PACKET=1 git -C daemon_child -c protocol.version=1 \
fetch 2>log &&
git -C daemon_child log -1 --format=%s origin/main >actual &&
git -C "$daemon_parent" log -1 --format=%s >expect &&
test_cmp expect actual &&
# Client requested to use protocol v1
grep "fetch> .*\\\0\\\0version=1\\\0$" log &&
# Server responded using protocol v1
grep "fetch< version 1" log
'
test_expect_success 'pull with git:// using protocol v1' '
GIT_TRACE_PACKET=1 git -C daemon_child -c protocol.version=1 \
pull 2>log &&
git -C daemon_child log -1 --format=%s >actual &&
git -C "$daemon_parent" log -1 --format=%s >expect &&
test_cmp expect actual &&
# Client requested to use protocol v1
grep "fetch> .*\\\0\\\0version=1\\\0$" log &&
# Server responded using protocol v1
grep "fetch< version 1" log
'
test_expect_success 'push with git:// using protocol v1' '
test_commit -C daemon_child three &&
# Push to another branch, as the target repository has the
# main branch checked out and we cannot push into it.
GIT_TRACE_PACKET=1 git -C daemon_child -c protocol.version=1 \
push origin HEAD:client_branch 2>log &&
git -C daemon_child log -1 --format=%s >actual &&
git -C "$daemon_parent" log -1 --format=%s client_branch >expect &&
test_cmp expect actual &&
# Client requested to use protocol v1
grep "push> .*\\\0\\\0version=1\\\0$" log &&
# Server responded using protocol v1
grep "push< version 1" log
'
stop_git_daemon
# Test protocol v1 with 'file://' transport
#
test_expect_success 'create repo to be served by file:// transport' '
git init file_parent &&
test_commit -C file_parent one
'
test_expect_success 'clone with file:// using protocol v1' '
GIT_TRACE_PACKET=1 git -c protocol.version=1 \
clone "file://$(pwd)/file_parent" file_child 2>log &&
git -C file_child log -1 --format=%s >actual &&
git -C file_parent log -1 --format=%s >expect &&
test_cmp expect actual &&
# Server responded using protocol v1
grep "clone< version 1" log
'
test_expect_success 'fetch with file:// using protocol v1' '
test_commit -C file_parent two &&
GIT_TRACE_PACKET=1 git -C file_child -c protocol.version=1 \
fetch 2>log &&
git -C file_child log -1 --format=%s origin/main >actual &&
git -C file_parent log -1 --format=%s >expect &&
test_cmp expect actual &&
# Server responded using protocol v1
grep "fetch< version 1" log
'
test_expect_success 'pull with file:// using protocol v1' '
GIT_TRACE_PACKET=1 git -C file_child -c protocol.version=1 \
pull 2>log &&
git -C file_child log -1 --format=%s >actual &&
git -C file_parent log -1 --format=%s >expect &&
test_cmp expect actual &&
# Server responded using protocol v1
grep "fetch< version 1" log
'
test_expect_success 'push with file:// using protocol v1' '
test_commit -C file_child three &&
# Push to another branch, as the target repository has the
# main branch checked out and we cannot push into it.
GIT_TRACE_PACKET=1 git -C file_child -c protocol.version=1 \
push origin HEAD:client_branch 2>log &&
git -C file_child log -1 --format=%s >actual &&
git -C file_parent log -1 --format=%s client_branch >expect &&
test_cmp expect actual &&
# Server responded using protocol v1
grep "push< version 1" log
'
test_expect_success 'cloning branchless tagless but not refless remote' '
rm -rf server client &&
git -c init.defaultbranch=main init server &&
echo foo >server/foo.txt &&
git -C server add foo.txt &&
git -C server commit -m "message" &&
git -C server update-ref refs/notbranch/alsonottag HEAD &&
git -C server checkout --detach &&
git -C server branch -D main &&
git -C server symbolic-ref HEAD refs/heads/nonexistentbranch &&
git -c protocol.version=1 clone "file://$(pwd)/server" client
'
# Test protocol v1 with 'ssh://' transport
#
test_expect_success 'setup ssh wrapper' '
GIT_SSH="$GIT_BUILD_DIR/t/helper/test-fake-ssh" &&
export GIT_SSH &&
GIT_SSH_VARIANT=ssh &&
export GIT_SSH_VARIANT &&
export TRASH_DIRECTORY &&
>"$TRASH_DIRECTORY"/ssh-output
'
expect_ssh () {
test_when_finished '(cd "$TRASH_DIRECTORY" && rm -f ssh-expect && >ssh-output)' &&
echo "ssh: -o SendEnv=GIT_PROTOCOL myhost $1 '$PWD/ssh_parent'" >"$TRASH_DIRECTORY/ssh-expect" &&
(cd "$TRASH_DIRECTORY" && test_cmp ssh-expect ssh-output)
}
test_expect_success 'create repo to be served by ssh:// transport' '
git init ssh_parent &&
test_commit -C ssh_parent one
'
test_expect_success 'clone with ssh:// using protocol v1' '
GIT_TRACE_PACKET=1 git -c protocol.version=1 \
clone "ssh://myhost:$(pwd)/ssh_parent" ssh_child 2>log &&
expect_ssh git-upload-pack &&
git -C ssh_child log -1 --format=%s >actual &&
git -C ssh_parent log -1 --format=%s >expect &&
test_cmp expect actual &&
# Server responded using protocol v1
grep "clone< version 1" log
'
test_expect_success 'fetch with ssh:// using protocol v1' '
test_commit -C ssh_parent two &&
GIT_TRACE_PACKET=1 git -C ssh_child -c protocol.version=1 \
fetch 2>log &&
expect_ssh git-upload-pack &&
git -C ssh_child log -1 --format=%s origin/main >actual &&
git -C ssh_parent log -1 --format=%s >expect &&
test_cmp expect actual &&
# Server responded using protocol v1
grep "fetch< version 1" log
'
test_expect_success 'pull with ssh:// using protocol v1' '
GIT_TRACE_PACKET=1 git -C ssh_child -c protocol.version=1 \
pull 2>log &&
expect_ssh git-upload-pack &&
git -C ssh_child log -1 --format=%s >actual &&
git -C ssh_parent log -1 --format=%s >expect &&
test_cmp expect actual &&
# Server responded using protocol v1
grep "fetch< version 1" log
'
test_expect_success 'push with ssh:// using protocol v1' '
test_commit -C ssh_child three &&
# Push to another branch, as the target repository has the
# main branch checked out and we cannot push into it.
GIT_TRACE_PACKET=1 git -C ssh_child -c protocol.version=1 \
push origin HEAD:client_branch 2>log &&
expect_ssh git-receive-pack &&
git -C ssh_child log -1 --format=%s >actual &&
git -C ssh_parent log -1 --format=%s client_branch >expect &&
test_cmp expect actual &&
# Server responded using protocol v1
grep "push< version 1" log
'
# Test protocol v1 with 'http://' transport
#
. "$TEST_DIRECTORY"/lib-httpd.sh
start_httpd
test_expect_success 'create repo to be served by http:// transport' '
git init "$HTTPD_DOCUMENT_ROOT_PATH/http_parent" &&
git -C "$HTTPD_DOCUMENT_ROOT_PATH/http_parent" config http.receivepack true &&
test_commit -C "$HTTPD_DOCUMENT_ROOT_PATH/http_parent" one
'
test_expect_success 'clone with http:// using protocol v1' '
GIT_TRACE_PACKET=1 GIT_TRACE_CURL=1 git -c protocol.version=1 \
clone "$HTTPD_URL/smart/http_parent" http_child 2>log &&
git -C http_child log -1 --format=%s >actual &&
git -C "$HTTPD_DOCUMENT_ROOT_PATH/http_parent" log -1 --format=%s >expect &&
test_cmp expect actual &&
# Client requested to use protocol v1
grep "Git-Protocol: version=1" log &&
# Server responded using protocol v1
grep "git< version 1" log
'
test_expect_success 'fetch with http:// using protocol v1' '
test_commit -C "$HTTPD_DOCUMENT_ROOT_PATH/http_parent" two &&
GIT_TRACE_PACKET=1 git -C http_child -c protocol.version=1 \
fetch 2>log &&
git -C http_child log -1 --format=%s origin/main >actual &&
git -C "$HTTPD_DOCUMENT_ROOT_PATH/http_parent" log -1 --format=%s >expect &&
test_cmp expect actual &&
# Server responded using protocol v1
grep "git< version 1" log
'
test_expect_success 'pull with http:// using protocol v1' '
GIT_TRACE_PACKET=1 git -C http_child -c protocol.version=1 \
pull 2>log &&
git -C http_child log -1 --format=%s >actual &&
git -C "$HTTPD_DOCUMENT_ROOT_PATH/http_parent" log -1 --format=%s >expect &&
test_cmp expect actual &&
# Server responded using protocol v1
grep "git< version 1" log
'
test_expect_success 'push with http:// using protocol v1' '
test_commit -C http_child three &&
# Push to another branch, as the target repository has the
# main branch checked out and we cannot push into it.
GIT_TRACE_PACKET=1 git -C http_child -c protocol.version=1 \
push origin HEAD:client_branch && #2>log &&
git -C http_child log -1 --format=%s >actual &&
git -C "$HTTPD_DOCUMENT_ROOT_PATH/http_parent" log -1 --format=%s client_branch >expect &&
test_cmp expect actual &&
# Server responded using protocol v1
grep "git< version 1" log
'
# 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.
test_done