0c2f0d2703
Teach the connection logic to tell a serve that it understands protocol v1. This is done in 2 different ways for the builtin transports, both of which ultimately set 'GIT_PROTOCOL' to 'version=1' on the server. 1. git:// A normal request to git-daemon is structured as "command path/to/repo\0host=..\0" and due to a bug introduced in49ba83fb6(Add virtualization support to git-daemon, 2006-09-19) we aren't able to place any extra arguments (separated by NULs) besides the host otherwise the parsing of those arguments would enter an infinite loop. This bug was fixed in73bb33a94(daemon: Strictly parse the "extra arg" part of the command, 2009-06-04) but a check was put in place to disallow extra arguments so that new clients wouldn't trigger this bug in older servers. In order to get around this limitation git-daemon was taught to recognize additional request arguments hidden behind a second NUL byte. Requests can then be structured like: "command path/to/repo\0host=..\0\0version=1\0key=value\0". git-daemon can then parse out the extra arguments and set 'GIT_PROTOCOL' accordingly. By placing these extra arguments behind a second NUL byte we can skirt around both the infinite loop bug in49ba83fb6(Add virtualization support to git-daemon, 2006-09-19) as well as the explicit disallowing of extra arguments introduced in73bb33a94(daemon: Strictly parse the "extra arg" part of the command, 2009-06-04) because both of these versions of git-daemon check for a single NUL byte after the host argument before terminating the argument parsing. 2. ssh://, file:// Set 'GIT_PROTOCOL' environment variable with the desired protocol version. With the file:// transport, 'GIT_PROTOCOL' can be set explicitly in the locally running git-upload-pack or git-receive-pack processes. With the ssh:// transport and OpenSSH compliant ssh programs, 'GIT_PROTOCOL' can be sent across ssh by using '-o SendEnv=GIT_PROTOCOL' and having the server whitelist this environment variable. Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
224 lines
6.4 KiB
Bash
Executable File
224 lines
6.4 KiB
Bash
Executable File
#!/bin/sh
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test_description='test git wire-protocol transition'
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TEST_NO_CREATE_REPO=1
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. ./test-lib.sh
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# Test protocol v1 with 'git://' transport
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#
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. "$TEST_DIRECTORY"/lib-git-daemon.sh
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start_git_daemon --export-all --enable=receive-pack
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daemon_parent=$GIT_DAEMON_DOCUMENT_ROOT_PATH/parent
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test_expect_success 'create repo to be served by git-daemon' '
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git init "$daemon_parent" &&
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test_commit -C "$daemon_parent" one
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'
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test_expect_success 'clone with git:// using protocol v1' '
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GIT_TRACE_PACKET=1 git -c protocol.version=1 \
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clone "$GIT_DAEMON_URL/parent" daemon_child 2>log &&
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git -C daemon_child log -1 --format=%s >actual &&
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git -C "$daemon_parent" log -1 --format=%s >expect &&
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test_cmp expect actual &&
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# Client requested to use protocol v1
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grep "clone> .*\\\0\\\0version=1\\\0$" log &&
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# Server responded using protocol v1
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grep "clone< version 1" log
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'
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test_expect_success 'fetch with git:// using protocol v1' '
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test_commit -C "$daemon_parent" two &&
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GIT_TRACE_PACKET=1 git -C daemon_child -c protocol.version=1 \
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fetch 2>log &&
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git -C daemon_child log -1 --format=%s origin/master >actual &&
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git -C "$daemon_parent" log -1 --format=%s >expect &&
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test_cmp expect actual &&
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# Client requested to use protocol v1
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grep "fetch> .*\\\0\\\0version=1\\\0$" log &&
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# Server responded using protocol v1
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grep "fetch< version 1" log
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'
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test_expect_success 'pull with git:// using protocol v1' '
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GIT_TRACE_PACKET=1 git -C daemon_child -c protocol.version=1 \
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pull 2>log &&
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git -C daemon_child log -1 --format=%s >actual &&
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git -C "$daemon_parent" log -1 --format=%s >expect &&
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test_cmp expect actual &&
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# Client requested to use protocol v1
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grep "fetch> .*\\\0\\\0version=1\\\0$" log &&
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# Server responded using protocol v1
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grep "fetch< version 1" log
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'
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test_expect_success 'push with git:// using protocol v1' '
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test_commit -C daemon_child three &&
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# Push to another branch, as the target repository has the
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# master branch checked out and we cannot push into it.
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GIT_TRACE_PACKET=1 git -C daemon_child -c protocol.version=1 \
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push origin HEAD:client_branch 2>log &&
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git -C daemon_child log -1 --format=%s >actual &&
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git -C "$daemon_parent" log -1 --format=%s client_branch >expect &&
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test_cmp expect actual &&
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# Client requested to use protocol v1
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grep "push> .*\\\0\\\0version=1\\\0$" log &&
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# Server responded using protocol v1
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grep "push< version 1" log
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'
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stop_git_daemon
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# Test protocol v1 with 'file://' transport
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#
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test_expect_success 'create repo to be served by file:// transport' '
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git init file_parent &&
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test_commit -C file_parent one
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'
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test_expect_success 'clone with file:// using protocol v1' '
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GIT_TRACE_PACKET=1 git -c protocol.version=1 \
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clone "file://$(pwd)/file_parent" file_child 2>log &&
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git -C file_child log -1 --format=%s >actual &&
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git -C file_parent log -1 --format=%s >expect &&
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test_cmp expect actual &&
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# Server responded using protocol v1
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grep "clone< version 1" log
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'
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test_expect_success 'fetch with file:// using protocol v1' '
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test_commit -C file_parent two &&
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GIT_TRACE_PACKET=1 git -C file_child -c protocol.version=1 \
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fetch 2>log &&
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git -C file_child log -1 --format=%s origin/master >actual &&
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git -C file_parent log -1 --format=%s >expect &&
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test_cmp expect actual &&
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# Server responded using protocol v1
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grep "fetch< version 1" log
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'
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test_expect_success 'pull with file:// using protocol v1' '
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GIT_TRACE_PACKET=1 git -C file_child -c protocol.version=1 \
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pull 2>log &&
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git -C file_child log -1 --format=%s >actual &&
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git -C file_parent log -1 --format=%s >expect &&
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test_cmp expect actual &&
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# Server responded using protocol v1
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grep "fetch< version 1" log
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'
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test_expect_success 'push with file:// using protocol v1' '
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test_commit -C file_child three &&
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# Push to another branch, as the target repository has the
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# master branch checked out and we cannot push into it.
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GIT_TRACE_PACKET=1 git -C file_child -c protocol.version=1 \
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push origin HEAD:client_branch 2>log &&
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git -C file_child log -1 --format=%s >actual &&
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git -C file_parent log -1 --format=%s client_branch >expect &&
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test_cmp expect actual &&
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# Server responded using protocol v1
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grep "push< version 1" log
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'
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# Test protocol v1 with 'ssh://' transport
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#
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test_expect_success 'setup ssh wrapper' '
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GIT_SSH="$GIT_BUILD_DIR/t/helper/test-fake-ssh" &&
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export GIT_SSH &&
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export TRASH_DIRECTORY &&
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>"$TRASH_DIRECTORY"/ssh-output
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'
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expect_ssh () {
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test_when_finished '(cd "$TRASH_DIRECTORY" && rm -f ssh-expect && >ssh-output)' &&
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echo "ssh: -o SendEnv=GIT_PROTOCOL myhost $1 '$PWD/ssh_parent'" >"$TRASH_DIRECTORY/ssh-expect" &&
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(cd "$TRASH_DIRECTORY" && test_cmp ssh-expect ssh-output)
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}
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test_expect_success 'create repo to be served by ssh:// transport' '
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git init ssh_parent &&
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test_commit -C ssh_parent one
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'
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test_expect_success 'clone with ssh:// using protocol v1' '
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GIT_TRACE_PACKET=1 git -c protocol.version=1 \
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clone "ssh://myhost:$(pwd)/ssh_parent" ssh_child 2>log &&
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expect_ssh git-upload-pack &&
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git -C ssh_child log -1 --format=%s >actual &&
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git -C ssh_parent log -1 --format=%s >expect &&
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test_cmp expect actual &&
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# Server responded using protocol v1
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grep "clone< version 1" log
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'
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test_expect_success 'fetch with ssh:// using protocol v1' '
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test_commit -C ssh_parent two &&
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GIT_TRACE_PACKET=1 git -C ssh_child -c protocol.version=1 \
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fetch 2>log &&
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expect_ssh git-upload-pack &&
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git -C ssh_child log -1 --format=%s origin/master >actual &&
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git -C ssh_parent log -1 --format=%s >expect &&
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test_cmp expect actual &&
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# Server responded using protocol v1
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grep "fetch< version 1" log
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'
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test_expect_success 'pull with ssh:// using protocol v1' '
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GIT_TRACE_PACKET=1 git -C ssh_child -c protocol.version=1 \
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pull 2>log &&
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expect_ssh git-upload-pack &&
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git -C ssh_child log -1 --format=%s >actual &&
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git -C ssh_parent log -1 --format=%s >expect &&
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test_cmp expect actual &&
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# Server responded using protocol v1
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grep "fetch< version 1" log
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'
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test_expect_success 'push with ssh:// using protocol v1' '
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test_commit -C ssh_child three &&
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# Push to another branch, as the target repository has the
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# master branch checked out and we cannot push into it.
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GIT_TRACE_PACKET=1 git -C ssh_child -c protocol.version=1 \
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push origin HEAD:client_branch 2>log &&
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expect_ssh git-receive-pack &&
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git -C ssh_child log -1 --format=%s >actual &&
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git -C ssh_parent log -1 --format=%s client_branch >expect &&
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test_cmp expect actual &&
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# Server responded using protocol v1
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grep "push< version 1" log
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'
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test_done
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