def rollback_release():
"""
Rollbacks latest release
"""
ensure('current_path')
releases_path = fetch('releases_path')
with (settings(show('debug'))):
with cd(releases_path):
echo_subtask('Finding previous release for rollback')
rollback_release_number = run(
'ls -1A | sort -n | tail -n 2 | head -n 1')
if int(rollback_release_number) > 0:
echo_subtask('Linking previous release to current')
run('ln -nfs %s/%s %s' %
(releases_path, rollback_release_number,
fetch('current_path')))
echo_subtask('Finding latest release')
current_release = run('ls -1A | sort -n | tail -n 1')
if int(current_release) > 0:
echo_subtask('Removing latest release')
run('rm -rf %s/%s' % (releases_path, current_release))
else:
abort('Can\'t find latest release for remove.')
else:
abort('Can\'t find previous release for rollback.')
def move_build_to_releases():
"""
Moves current build folder to releases path
"""
ensure('build_to')
ensure('release_to')
echo_subtask('Moving from build path to release path')
run('mv %s %s' % (fetch('build_to'), fetch('release_to')))
def lock():
"""
Locks deploy
Parallel deploys are not allowed
"""
ensure('build_to')
echo_subtask("Creating `deploy.lock` file")
run('touch %s' % os.path.join(fetch('deploy_to'), 'deploy.lock'))
def add_host_to_known_hosts():
"""
Adds current host to the known hosts
`fabric3` library sets to `env.host_string` current host where task is executed
"""
ensure('hosts')
echo_subtask('Adding current host to known hosts')
add_to_known_hosts(env.host_string, env.port)
def lock():
"""
Locks deploy
Parallel deploys are not allowed
"""
ensure('build_to')
echo_subtask("Creating `deploy.lock` file")
create_entity('/'.join([fetch('deploy_to'), 'deploy.lock']),
entity_type='file',
protected=False)
def link_release_to_current():
"""
Creates current release symlink in `deploy_to` path
"""
ensure('current_path')
release_to = fetch('release_to')
echo_subtask("Linking release to current")
with cd(release_to):
run('ln -nfs %s %s' % (release_to, fetch('current_path')))
def use_git_branch():
"""
Clones repository to build dir
"""
ensure('scm')
ensure('branch')
build_to = fetch('build_to')
echo_subtask("Copying code from repository to build folder")
run('git clone {0} {1} --recursive --branch {2}'.format(
fetch('scm'), build_to, fetch('branch')))
run('rm -rf %s' % os.path.join(build_to, '.git'))
def use_git_branch():
"""
Clones repository to build dir
"""
ensure('scm')
ensure('branch')
build_to = fetch('build_to')
echo_subtask("Copying code from repository to build folder")
run('git clone {0} {1} --recursive --branch {2}'.format(
fetch('scm'), build_to, fetch('branch')))
with settings(warn_only=True):
run('rm -rf %s' % '/'.join([build_to, '.git']))
def create_build_path():
"""
Creates tmp dir for building app.
Folder will be:
* deleted -> if build fails
* moved to releases -> if build succeeds
"""
ensure('build_to')
echo_subtask("Creating build path")
with settings(hide('warnings'), warn_only=True):
build_path = fetch('build_to')
if run('test -d %s' % build_path).failed:
create_entity(build_path, entity_type='directory', protected=False)
def cleanup_releases():
"""
Cleans up old releases
"""
ensure('releases_path')
releases_count = str(fetch('keep_releases'))
echo_subtask("Cleaning up old realeses. Keeping latest %s" %
releases_count)
with cd(fetch('releases_path')), show('debug'):
cmd = '''
count=$(ls -A1 | sort -rn | wc -l)
remove=$((count > %s ? count - %s : 0))
ls -A1 | sort -rn | tail -n $remove | xargs rm -rf {}'''
run(cmd % (releases_count, releases_count))
def maybe_clone_git_repository():
"""
Clones bare git repository on first deploy
"""
ensure('repository')
scm_path = fetch('scm')
with settings(hide('warnings'), warn_only=True):
echo_subtask('Ensuring git repository presence')
if run('test -d %s' % scm_path).failed:
create_entity(scm_path, entity_type='directory', protected=False)
if run('test -f %s' % '/'.join([scm_path, 'HEAD'])).failed:
echo_subtask("Cloning bare git repository")
with settings(hide('output')):
run('git clone {0} {1} --bare'.format(fetch('repository'),
scm_path))
def cleanup_releases():
"""
Cleans up old releases
"""
ensure('releases_path')
ensure('keep_releases')
releases_count = str(fetch('keep_releases'))
if (releases_count == "-1"):
return
echo_subtask("Cleaning up old realeses. Keeping latest %s" %
releases_count)
with cd(fetch('releases_path')), show('debug'):
use_sudo = 'sudo' if fetch('sudo_on_cleanup_releases') else ''
cmd = '''
count=$(ls -A1 | sort -rn | wc -l)
remove=$((count > %s ? count - %s : 0))
ls -A1 | sort -rn | tail -n $remove | xargs %s rm -rf {}'''
run(cmd % (releases_count, releases_count, use_sudo))
def fetch_new_commits():
"""
Fetches new git commits
"""
ensure('scm')
ensure('repository')
ensure('branch')
echo_subtask("Fetching new commits")
with cd(fetch('scm')):
run('git fetch {0} "{1}:{1}" --force'.format(fetch('repository'),
fetch('branch')))