def discover_latest_release():
"""
Connects to remote server and discovers next release number
"""
releases_path = fetch('releases_path')
echo_subtask("Discovering latest release number")
# Get latest release number
with settings(hide('warnings'), warn_only=True):
if run('test -d %s' % releases_path).failed:
last_release_number = 0
create_entity(releases_path,
entity_type='directory',
protected=False)
else:
releases_respond = run('ls -1p %s | sed "s/\///g"' % releases_path)
releases_dirs = list(
filter(lambda x: len(x) != 0, releases_respond.split('\r\n')))
if len(releases_dirs) > 0:
last_release_number = max(map(lambda x: int(x),
releases_dirs)) or 0
else:
last_release_number = 0
release_number = last_release_number + 1
# Set release info to config
set('release_number', release_number)
set('release_to', '/'.join([releases_path, str(release_number)]))
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_files(files):
global shared
global build_to
for sfile in files:
relative_path = '/'.join(['.', sfile])
directory, filename_ = os.path.split(relative_path)
shared_path = '/'.join([shared, sfile])
with cd(build_to):
create_entity(directory,
entity_type='directory',
protected=False) # create parent directory
run('ln -sf %s %s' %
(shared_path,
relative_path)) # link shared to current folder
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 link_dirs(dirs):
global shared
global build_to
for sdir in dirs:
relative_path = '/'.join(['.', sdir])
directory, filename_ = os.path.split(relative_path)
shared_path = '/'.join([shared, sdir])
with cd(build_to):
create_entity(directory,
entity_type='directory',
protected=False) # create parent directory
run('rm -rf %s' % relative_path
) # remove directory if it conficts with shared
run('ln -s %s %s' %
(shared_path,
relative_path)) # link shared to current folder
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))