def release(self, rel, check_exists=False):
if not os.path.isabs(rel):
rel = os.path.join(self.home, 'releases', rel)
if check_exists and not path_exists(rel):
abort('no such release:%s' % rel)
return rel
def switch_current_to(self, rel=None):
'''
switch curernt link to rel.
if operation failed, leave current link unchanged
'''
if rel is None:
rel = self.get_rel_id()
path = self.release(rel, True)
def link_to():
with settings(warn_only=True):
return mine('ln -s %s %s' % (path, self.current)).succeeded
def rollback_if_failed():
bak = self.current+'.bak'
mine('mv %s %s' % (self.current, bak))
def rollback():
mine('mv %s %s' % (bak, self.current))
try:
ok = link_to()
except:
rollback()
raise
if ok:
mine('rm -r %s' % bak)
else:
rollback()
abort('switch failed, rollback to original')
if path_exists(self.current):
rollback_if_failed()
else:
link_to()
def save_current_for_rollback(self):
if not path_exists(self.current):
#for the first time deploy, there is no current link
return
path = self.get_rel_id()
curr = self.current_release()
mine("echo '%s' > '%s'" % (curr, os.path.join(path, 'PREV')))
def overwrite_to_release(self, src):
rel = self.get_rel_id()
if path_exists(rel):
abort('try to overwrite a exists release:%s->%s' % (src, rel))
curr = self.current_release(True)
mine("cp -r '%s' '%s'" % (curr, rel))
mine("cp -r '%s'/* '%s'" % (src, rel))
return rel
def make_workspace(self, home):
if path_exists(home):
if not is_owner(home):
abort('workspace already exists and does not belong to you, \
make sure you want to reinstall the project:%s' % home)
else:
with settings(hide('warnings'), warn_only=True):
if not sudo('mkdir %s' % home).failed:
sudo('chown %s %s' % (myenv.owner, home))
def get_previous(self, rel=None):
if rel:
rel = self.release(rel, True)
else:
rel = self.current_release(True)
prev = os.path.join(rel, 'PREV')
if path_exists(prev):
return mine("cat '%s'" % prev).stdout
abort('no avaiable previous version')
def current_release(self, check_exists=False):
'''
real path to which the current symbol link refer
'''
path = mine("readlink '%s'" % self.current).stdout
if not os.path.isabs(path):
path = os.path.join(os.path.dirname(self.current), path)
if check_exists and not path_exists(path):
abort('no such release:%s' % path)
return path
def push_to_release(self, src):
rel = self.get_rel_id()
if path_exists(rel):
abort('try to overwrite a exists release:%s->%s' % (src, rel))
mine("cp -r '%s' '%s'" % (src, rel))
return rel
