-def rollback():
- """
- Limited rollback capability. Simple loads the previously current
- version of the code. Rolling back again will swap between the two.
- """
- require('hosts', provided_by=[staging, production])
- require('path')
- with cd(env.path):
- run('mv releases/current releases/_previous;', pty=True)
- run('mv releases/previous releases/current;', pty=True)
- run('mv releases/_previous releases/previous;', pty=True)
- restart_webserver()
-
-
-# =====================================================================
-# = Helpers. These are called by other functions rather than directly =
-# =====================================================================
-def upload_tar_from_git():
- "Create an archive from the current Git master branch and upload it"
- print '>>> upload tar from git'
- require('release', provided_by=[deploy])
- local('git archive --format=tar master | gzip > %(release)s.tar.gz' % env)
- run('mkdir -p %(path)s/releases/%(release)s' % env, pty=True)
- run('mkdir -p %(path)s/packages' % env, pty=True)
- put('%(release)s.tar.gz' % env, '%(path)s/packages/' % env)
- run('cd %(path)s/releases/%(release)s && tar zxf ../../packages/%(release)s.tar.gz' % env, pty=True)
- local('rm %(release)s.tar.gz' % env)
-
-def install_requirements():
- "Install the required packages from the requirements file using pip"
- print '>>> install requirements'
- require('release', provided_by=[deploy])
-
- with settings(warn_only=True):
- pip_options = run('cat %(path)s/releases/%(release)s/pip-options.txt' % env)
- if pip_options.failed:
- env.pip_options = ''
- else:
- env.pip_options = pip_options
-
- run('cd %(path)s; %(pip)s install %(pip_options)s -E . -r ./releases/%(release)s/requirements.txt' % env)
-
-def symlink_current_release():
- "Symlink our current release"
- print '>>> symlink current release'
- require('release', provided_by=[deploy])
- require('path', provided_by=[staging, production])
- with cd(env.path):
- run('rm releases/previous; mv releases/current releases/previous')
- run('ln -s %(release)s releases/current' % env)