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 rollback():
'''
rollback to previous version
'''
schema = schemas.Cap(myenv.home)
curr = schema.current_release()
prev = schema.get_previous()
schema.switch_current_to(prev)
mine("rm -rf '%s'" % curr)
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')
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 rollback():
mine('mv %s %s' % (bak, self.current))
def link_to():
with settings(warn_only=True):
return mine('ln -s %s %s' % (path, self.current)).succeeded
def remove_useless(self, Dfiles):
rel = self.get_rel_id()
with cd(rel):
for name in Dfiles:
mine('rm -rf %s' % name.base)
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
def tag_info(self):
with cd(self.current):
return {
'TAG': mine('cat TAG').stdout,
'REV': mine('cat REV').stdout,
}
def build(self):
'''
build hierarchical directory structure in home
'''
for path in self.walk():
mine('mkdir -p %s' % path)
