automation: allow exit code of 1 for `hg push`
`hg push` exits 1 for no-ops. No-op pushes should be fine in the
context of automation.
# linux.py - Linux specific automation functionality
#
# Copyright 2019 Gregory Szorc <gregory.szorc@gmail.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
# no-check-code because Python 3 native.
import os
import pathlib
import shlex
import subprocess
import tempfile
from .ssh import (
exec_command,
)
# Linux distributions that are supported.
DISTROS = {
'debian9',
'ubuntu18.04',
'ubuntu18.10',
'ubuntu19.04',
}
INSTALL_PYTHONS = r'''
PYENV2_VERSIONS="2.7.16 pypy2.7-7.1.1"
PYENV3_VERSIONS="3.5.7 3.6.8 3.7.3 3.8-dev pypy3.5-7.0.0 pypy3.6-7.1.1"
git clone https://github.com/pyenv/pyenv.git /hgdev/pyenv
pushd /hgdev/pyenv
git checkout 3faeda67bb33e07750d1a104271369a7384ca45c
popd
export PYENV_ROOT="/hgdev/pyenv"
export PATH="$PYENV_ROOT/bin:$PATH"
# pip 19.0.3.
PIP_SHA256=efe99298f3fbb1f56201ce6b81d2658067d2f7d7dfc2d412e0d3cacc9a397c61
wget -O get-pip.py --progress dot:mega https://github.com/pypa/get-pip/raw/fee32c376da1ff6496a798986d7939cd51e1644f/get-pip.py
echo "${PIP_SHA256} get-pip.py" | sha256sum --check -
VIRTUALENV_SHA256=984d7e607b0a5d1329425dd8845bd971b957424b5ba664729fab51ab8c11bc39
VIRTUALENV_TARBALL=virtualenv-16.4.3.tar.gz
wget -O ${VIRTUALENV_TARBALL} --progress dot:mega https://files.pythonhosted.org/packages/37/db/89d6b043b22052109da35416abc3c397655e4bd3cff031446ba02b9654fa/${VIRTUALENV_TARBALL}
echo "${VIRTUALENV_SHA256} ${VIRTUALENV_TARBALL}" | sha256sum --check -
for v in ${PYENV2_VERSIONS}; do
pyenv install -v ${v}
${PYENV_ROOT}/versions/${v}/bin/python get-pip.py
${PYENV_ROOT}/versions/${v}/bin/pip install ${VIRTUALENV_TARBALL}
${PYENV_ROOT}/versions/${v}/bin/pip install -r /hgdev/requirements-py2.txt
done
for v in ${PYENV3_VERSIONS}; do
pyenv install -v ${v}
${PYENV_ROOT}/versions/${v}/bin/python get-pip.py
${PYENV_ROOT}/versions/${v}/bin/pip install -r /hgdev/requirements-py3.txt
done
pyenv global ${PYENV2_VERSIONS} ${PYENV3_VERSIONS} system
'''.lstrip().replace('\r\n', '\n')
BOOTSTRAP_VIRTUALENV = r'''
/usr/bin/virtualenv /hgdev/venv-bootstrap
HG_SHA256=1bdd21bb87d1e05fb5cd395d488d0e0cc2f2f90ce0fd248e31a03595da5ccb47
HG_TARBALL=mercurial-4.9.1.tar.gz
wget -O ${HG_TARBALL} --progress dot:mega https://www.mercurial-scm.org/release/${HG_TARBALL}
echo "${HG_SHA256} ${HG_TARBALL}" | sha256sum --check -
/hgdev/venv-bootstrap/bin/pip install ${HG_TARBALL}
'''.lstrip().replace('\r\n', '\n')
BOOTSTRAP_DEBIAN = r'''
#!/bin/bash
set -ex
DISTRO=`grep DISTRIB_ID /etc/lsb-release | awk -F= '{{print $2}}'`
DEBIAN_VERSION=`cat /etc/debian_version`
LSB_RELEASE=`lsb_release -cs`
sudo /usr/sbin/groupadd hg
sudo /usr/sbin/groupadd docker
sudo /usr/sbin/useradd -g hg -G sudo,docker -d /home/hg -m -s /bin/bash hg
sudo mkdir /home/hg/.ssh
sudo cp ~/.ssh/authorized_keys /home/hg/.ssh/authorized_keys
sudo chown -R hg:hg /home/hg/.ssh
sudo chmod 700 /home/hg/.ssh
sudo chmod 600 /home/hg/.ssh/authorized_keys
cat << EOF | sudo tee /etc/sudoers.d/90-hg
hg ALL=(ALL) NOPASSWD:ALL
EOF
sudo apt-get update
sudo DEBIAN_FRONTEND=noninteractive apt-get -yq dist-upgrade
# Install packages necessary to set up Docker Apt repo.
sudo DEBIAN_FRONTEND=noninteractive apt-get -yq install --no-install-recommends \
apt-transport-https \
gnupg
cat > docker-apt-key << EOF
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G7c0tIkVEKNUq48b3aQ64NOZQW7fVjfoKwEZdOqPE72Pa45jrZzvUFxSpdiNk2tZ
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jonyUf9bwtWxFp05HC3GMHPhhcUSexCxQLQvnFWXD2sWLKivHp2fT8QbRGeZ+d3m
6fqcd5Fu7pxsqm0EUDK5NL+nPIgYhN+auTrhgzhK1CShfGccM/wfRlei9Utz6p9P
XRKIlWnXtT4qNGZNTN0tR+NLG/6Bqd8OYBaFAUcue/w1VW6JQ2VGYZHnZu9S8LMc
FYBa5Ig9PxwGQOgq6RDKDbV+PqTQT5EFMeR1mrjckk4DQJjbxeMZbiNMG5kGECA8
g383P3elhn03WGbEEa4MNc3Z4+7c236QI3xWJfNPdUbXRaAwhy/6rTSFbzwKB0Jm
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eRc6/0IbUSWvfjKxLLPfNeCS2pCL3IeEI5nothEEYdQH6szpLog79xB9dVnJyKJb
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1N4ZAqVMAEruyXTRTxc9XW0tYhDMA/1GYvz0EmFpm8LzTHA6sFVtPm/ZlNCX6P1X
zJwrv7DSQKD6GGlBQUX+OeEJ8tTkkf8QTJSPUdh8P8YxDFS5EOGAvhhpMBYD42kQ
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1WAP/2wJ+R0gE6qsce3rjaIz58PJmc8goKrir5hnElWhPgbq7cYIsW5qiFyLhkdp
YcMmhD9mRiPpQn6Ya2w3e3B8zfIVKipbMBnke/ytZ9M7qHmDCcjoiSmwEXN3wKYI
mD9VHONsl/CG1rU9Isw1jtB5g1YxuBA7M/m36XN6x2u+NtNMDB9P56yc4gfsZVES
KA9v+yY2/l45L8d/WUkUi0YXomn6hyBGI7JrBLq0CX37GEYP6O9rrKipfz73XfO7
JIGzOKZlljb/D9RX/g7nRbCn+3EtH7xnk+TK/50euEKw8SMUg147sJTcpQmv6UzZ
cM4JgL0HbHVCojV4C/plELwMddALOFeYQzTif6sMRPf+3DSj8frbInjChC3yOLy0
6br92KFom17EIj2CAcoeq7UPhi2oouYBwPxh5ytdehJkoo+sN7RIWua6P2WSmon5
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SVe2prlLureigXtmZfkqevRz7FrIZiu9ky8wnCAPwC7/zmS18rgP/17bOtL4/iIz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=0YYh
-----END PGP PUBLIC KEY BLOCK-----
EOF
sudo apt-key add docker-apt-key
if [ "$DEBIAN_VERSION" = "9.8" ]; then
cat << EOF | sudo tee -a /etc/apt/sources.list
# Need backports for clang-format-6.0
deb http://deb.debian.org/debian stretch-backports main
# Sources are useful if we want to compile things locally.
deb-src http://deb.debian.org/debian stretch main
deb-src http://security.debian.org/debian-security stretch/updates main
deb-src http://deb.debian.org/debian stretch-updates main
deb-src http://deb.debian.org/debian stretch-backports main
deb [arch=amd64] https://download.docker.com/linux/debian stretch stable
EOF
elif [ "$DISTRO" = "Ubuntu" ]; then
cat << EOF | sudo tee -a /etc/apt/sources.list
deb [arch=amd64] https://download.docker.com/linux/ubuntu $LSB_RELEASE stable
EOF
fi
sudo apt-get update
PACKAGES="\
btrfs-progs \
build-essential \
bzr \
clang-format-6.0 \
cvs \
darcs \
debhelper \
devscripts \
dpkg-dev \
dstat \
emacs \
gettext \
git \
htop \
iotop \
jfsutils \
libbz2-dev \
libexpat1-dev \
libffi-dev \
libgdbm-dev \
liblzma-dev \
libncurses5-dev \
libnss3-dev \
libreadline-dev \
libsqlite3-dev \
libssl-dev \
netbase \
ntfs-3g \
nvme-cli \
pyflakes \
pyflakes3 \
pylint \
pylint3 \
python-all-dev \
python-dev \
python-docutils \
python-fuzzywuzzy \
python-pygments \
python-subversion \
python-vcr \
python3-dev \
python3-docutils \
python3-fuzzywuzzy \
python3-pygments \
python3-vcr \
rsync \
sqlite3 \
subversion \
tcl-dev \
tk-dev \
tla \
unzip \
uuid-dev \
vim \
virtualenv \
wget \
xfsprogs \
zip \
zlib1g-dev"
if [ "$DEBIAN_VERSION" = "9.8" ]; then
PACKAGES="$PACKAGES linux-perf"
elif [ "$DISTRO" = "Ubuntu" ]; then
PACKAGES="$PACKAGES linux-tools-common"
fi
# Ubuntu 19.04 removes monotone.
if [ "$LSB_RELEASE" != "disco" ]; then
PACKAGES="$PACKAGES monotone"
fi
# As of April 27, 2019, Docker hasn't published packages for
# Ubuntu 19.04 yet.
if [ "$LSB_RELEASE" != "disco" ]; then
PACKAGES="$PACKAGES docker-ce"
fi
sudo DEBIAN_FRONTEND=noninteractive apt-get -yq install --no-install-recommends $PACKAGES
# Create clang-format symlink so test harness finds it.
sudo update-alternatives --install /usr/bin/clang-format clang-format \
/usr/bin/clang-format-6.0 1000
sudo mkdir /hgdev
# Will be normalized to hg:hg later.
sudo chown `whoami` /hgdev
cp requirements-py2.txt /hgdev/requirements-py2.txt
cp requirements-py3.txt /hgdev/requirements-py3.txt
# Disable the pip version check because it uses the network and can
# be annoying.
cat << EOF | sudo tee -a /etc/pip.conf
[global]
disable-pip-version-check = True
EOF
{install_pythons}
{bootstrap_virtualenv}
/hgdev/venv-bootstrap/bin/hg clone https://www.mercurial-scm.org/repo/hg /hgdev/src
# Mark the repo as non-publishing.
cat >> /hgdev/src/.hg/hgrc << EOF
[phases]
publish = false
EOF
sudo chown -R hg:hg /hgdev
'''.lstrip().format(
install_pythons=INSTALL_PYTHONS,
bootstrap_virtualenv=BOOTSTRAP_VIRTUALENV
).replace('\r\n', '\n')
# Prepares /hgdev for operations.
PREPARE_HGDEV = '''
#!/bin/bash
set -e
FS=$1
ensure_device() {
if [ -z "${DEVICE}" ]; then
echo "could not find block device to format"
exit 1
fi
}
# Determine device to partition for extra filesystem.
# If only 1 volume is present, it will be the root volume and
# should be /dev/nvme0. If multiple volumes are present, the
# root volume could be nvme0 or nvme1. Use whichever one doesn't have
# a partition.
if [ -e /dev/nvme1n1 ]; then
if [ -e /dev/nvme0n1p1 ]; then
DEVICE=/dev/nvme1n1
else
DEVICE=/dev/nvme0n1
fi
else
DEVICE=
fi
sudo mkdir /hgwork
if [ "${FS}" != "default" -a "${FS}" != "tmpfs" ]; then
ensure_device
echo "creating ${FS} filesystem on ${DEVICE}"
fi
if [ "${FS}" = "default" ]; then
:
elif [ "${FS}" = "btrfs" ]; then
sudo mkfs.btrfs ${DEVICE}
sudo mount ${DEVICE} /hgwork
elif [ "${FS}" = "ext3" ]; then
# lazy_journal_init speeds up filesystem creation at the expense of
# integrity if things crash. We are an ephemeral instance, so we don't
# care about integrity.
sudo mkfs.ext3 -E lazy_journal_init=1 ${DEVICE}
sudo mount ${DEVICE} /hgwork
elif [ "${FS}" = "ext4" ]; then
sudo mkfs.ext4 -E lazy_journal_init=1 ${DEVICE}
sudo mount ${DEVICE} /hgwork
elif [ "${FS}" = "jfs" ]; then
sudo mkfs.jfs ${DEVICE}
sudo mount ${DEVICE} /hgwork
elif [ "${FS}" = "tmpfs" ]; then
echo "creating tmpfs volume in /hgwork"
sudo mount -t tmpfs -o size=1024M tmpfs /hgwork
elif [ "${FS}" = "xfs" ]; then
sudo mkfs.xfs ${DEVICE}
sudo mount ${DEVICE} /hgwork
else
echo "unsupported filesystem: ${FS}"
exit 1
fi
echo "/hgwork ready"
sudo chown hg:hg /hgwork
mkdir /hgwork/tmp
chown hg:hg /hgwork/tmp
rsync -a /hgdev/src /hgwork/
'''.lstrip().replace('\r\n', '\n')
HG_UPDATE_CLEAN = '''
set -ex
HG=/hgdev/venv-bootstrap/bin/hg
cd /hgwork/src
${HG} --config extensions.purge= purge --all
${HG} update -C $1
${HG} log -r .
'''.lstrip().replace('\r\n', '\n')
def prepare_exec_environment(ssh_client, filesystem='default'):
"""Prepare an EC2 instance to execute things.
The AMI has an ``/hgdev`` bootstrapped with various Python installs
and a clone of the Mercurial repo.
In EC2, EBS volumes launched from snapshots have wonky performance behavior.
Notably, blocks have to be copied on first access, which makes volume
I/O extremely slow on fresh volumes.
Furthermore, we may want to run operations, tests, etc on alternative
filesystems so we examine behavior on different filesystems.
This function is used to facilitate executing operations on alternate
volumes.
"""
sftp = ssh_client.open_sftp()
with sftp.open('/hgdev/prepare-hgdev', 'wb') as fh:
fh.write(PREPARE_HGDEV)
fh.chmod(0o0777)
command = 'sudo /hgdev/prepare-hgdev %s' % filesystem
chan, stdin, stdout = exec_command(ssh_client, command)
stdin.close()
for line in stdout:
print(line, end='')
res = chan.recv_exit_status()
if res:
raise Exception('non-0 exit code updating working directory; %d'
% res)
def synchronize_hg(source_path: pathlib.Path, ec2_instance, revision: str=None):
"""Synchronize a local Mercurial source path to remote EC2 instance."""
with tempfile.TemporaryDirectory() as temp_dir:
temp_dir = pathlib.Path(temp_dir)
ssh_dir = temp_dir / '.ssh'
ssh_dir.mkdir()
ssh_dir.chmod(0o0700)
public_ip = ec2_instance.public_ip_address
ssh_config = ssh_dir / 'config'
with ssh_config.open('w', encoding='utf-8') as fh:
fh.write('Host %s\n' % public_ip)
fh.write(' User hg\n')
fh.write(' StrictHostKeyChecking no\n')
fh.write(' UserKnownHostsFile %s\n' % (ssh_dir / 'known_hosts'))
fh.write(' IdentityFile %s\n' % ec2_instance.ssh_private_key_path)
if not (source_path / '.hg').is_dir():
raise Exception('%s is not a Mercurial repository; synchronization '
'not yet supported' % source_path)
env = dict(os.environ)
env['HGPLAIN'] = '1'
env['HGENCODING'] = 'utf-8'
hg_bin = source_path / 'hg'
res = subprocess.run(
['python2.7', str(hg_bin), 'log', '-r', revision, '-T', '{node}'],
cwd=str(source_path), env=env, check=True, capture_output=True)
full_revision = res.stdout.decode('ascii')
args = [
'python2.7', str(hg_bin),
'--config', 'ui.ssh=ssh -F %s' % ssh_config,
'--config', 'ui.remotecmd=/hgdev/venv-bootstrap/bin/hg',
'push', '-f', '-r', full_revision,
'ssh://%s//hgwork/src' % public_ip,
]
res = subprocess.run(args, cwd=str(source_path), env=env)
# Allow 1 (no-op) to not trigger error.
if res.returncode not in (0, 1):
res.check_returncode()
# TODO support synchronizing dirty working directory.
sftp = ec2_instance.ssh_client.open_sftp()
with sftp.open('/hgdev/hgup', 'wb') as fh:
fh.write(HG_UPDATE_CLEAN)
fh.chmod(0o0700)
chan, stdin, stdout = exec_command(
ec2_instance.ssh_client, '/hgdev/hgup %s' % full_revision)
stdin.close()
for line in stdout:
print(line, end='')
res = chan.recv_exit_status()
if res:
raise Exception('non-0 exit code updating working directory; %d'
% res)
def run_tests(ssh_client, python_version, test_flags=None):
"""Run tests on a remote Linux machine via an SSH client."""
test_flags = test_flags or []
print('running tests')
if python_version == 'system2':
python = '/usr/bin/python2'
elif python_version == 'system3':
python = '/usr/bin/python3'
elif python_version.startswith('pypy'):
python = '/hgdev/pyenv/shims/%s' % python_version
else:
python = '/hgdev/pyenv/shims/python%s' % python_version
test_flags = ' '.join(shlex.quote(a) for a in test_flags)
command = (
'/bin/sh -c "export TMPDIR=/hgwork/tmp; '
'cd /hgwork/src/tests && %s run-tests.py %s"' % (
python, test_flags))
chan, stdin, stdout = exec_command(ssh_client, command)
stdin.close()
for line in stdout:
print(line, end='')
return chan.recv_exit_status()