From 3f56ff5bfb09f3cf071d023bab97f606d385a637 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Markus=20Zapke-Gru=CC=88ndemann?= <markus@keimlink.de>
Date: Tue, 24 Jan 2012 03:26:51 +0100
Subject: add fabfile for easy deployment

---
 fabfile/__init__.py | 32 ++++++++++++++++++
 fabfile/helpers.py  | 97 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 fabfile/setups.py   | 39 +++++++++++++++++++++
 3 files changed, 168 insertions(+)
 create mode 100644 fabfile/__init__.py
 create mode 100644 fabfile/helpers.py
 create mode 100644 fabfile/setups.py

diff --git a/fabfile/__init__.py b/fabfile/__init__.py
new file mode 100644
index 0000000..332068c
--- /dev/null
+++ b/fabfile/__init__.py
@@ -0,0 +1,32 @@
+"""subweb deployment package.
+
+Always prefix a task with the appropriate setup.
+
+Examples:
+
+    $ fab setups.stage deploy
+    $ fab setups.production version
+    $ fab setups.prod load_fixture:fixtures/flatpages.json
+"""
+from fabric.api import *
+
+from fabfile import helpers
+from fabfile import setups
+
+
+@task
+def deploy():
+    """Deploys the project.
+
+    Updates the sources, links the appropriate settings, collects the static
+    files and synchronizes/migrates the database.
+
+    Installing/updating Python packages or loading fixtures needs to be done
+    manually.
+    """
+    helpers.update_project()
+    helpers.link_settings()
+    helpers.collect_static()
+    helpers.syncdb()
+    helpers.migrate()
+    # TODO restart application server
diff --git a/fabfile/helpers.py b/fabfile/helpers.py
new file mode 100644
index 0000000..c31461b
--- /dev/null
+++ b/fabfile/helpers.py
@@ -0,0 +1,97 @@
+"""Deployment helpers.
+"""
+from os.path import join as join_path
+
+from fabric.api import *
+from fabric.contrib import files
+
+
+def ve_run(cmd):
+    """Runs a command inside the activated virtualenv.
+    """
+    require('root', provided_by=['setups.stage', 'setups.production'])
+    with prefix('source %(root)s/bin/activate' % env):
+        run(cmd)
+
+
+def manage(cmd):
+    """Runs a command with manage.py.
+    """
+    require('manage_py', provided_by=['setups.stage', 'setups.production'])
+    ve_run('%s %s' % (env.manage_py, cmd))
+
+
+def update_project():
+    """Updates the project source.
+    """
+    require('src_root', provided_by=['setups.stage', 'setups.production'])
+    require('git_branch', provided_by=['setups.stage', 'setups.production'])
+    with cd(env.src_root):
+        run('git pull origin %(git_branch)s' % env)
+
+
+def link_settings():
+    """Links the appropriate settings.
+    """
+    require('stage', provided_by=['setups.stage', 'setups.production'])
+    require('config', provided_by=['setups.stage', 'setups.production'])
+    require('proj_root', provided_by=['setups.stage', 'setups.production'])
+    if env.stage:
+        host_settings = join_path(env.config, '%(host)s_stage.py' % env)
+    else:
+        host_settings = join_path(env.config, '%(host)s.py' % env)
+    settings = join_path(env.proj_root, 'local_settings.py')
+    if files.exists(settings):
+        run('rm %s' % settings)
+    if files.exists(host_settings):
+        run('ln -s %s %s' % (host_settings, settings))
+    else:
+        print 'No host specific settings file found. Create one at %s' % host_settings
+
+
+def collect_static():
+    """Collects all static files.
+    """
+    manage('collectstatic')
+
+
+@task
+def syncdb():
+    """Runs the syncdb management command.
+    """
+    manage('syncdb')
+
+
+@task
+def migrate(app_name=None):
+    """Runs the migrations for one or all apps.
+    """
+    manage('migrate %s' % app_name)
+
+
+@task(alias='id')
+def indetify():
+    """Identifes the deployed project.
+
+    Displays the deployed project version, all Python packages installed inside
+    the virtualenv and the state of the migrations.
+    """
+    require('proj_root', provided_by=['setups.stage', 'setups.production'])
+    with cd(env.proj_root):
+        run('git log -1')
+    ve_run('pip freeze')
+    manage('migrate -list')
+
+
+@task(alias='install')
+def install_requirements():
+    """Installs the requirements.
+    """
+    require('pip_file', provided_by=['setups.stage', 'setups.production'])
+    ve_run('pip install -r %(pip_file)s' % env)
+
+
+@task(alias='load')
+def load_fixture(fixture_path):
+    """Loads one or more fixtures."""
+    manage('loaddata %s' % fixture_path)
diff --git a/fabfile/setups.py b/fabfile/setups.py
new file mode 100644
index 0000000..f4d1de8
--- /dev/null
+++ b/fabfile/setups.py
@@ -0,0 +1,39 @@
+"""Setups to deploy to.
+"""
+from os.path import join as join_path
+
+from fabric.api import *
+
+
+@task
+def stage():
+    """Defines stage setup.
+    """
+    env.stage = True
+    env.git_branch = 'master'
+    env.hosts = ['oberon.sublab.org']
+    env.home = '/home/subweb'
+    env.root = join_path(env.home, 'stage')
+    finalize()
+
+
+@task(alias='prod')
+def production():
+    """Defines production setup.
+    """
+    env.stage = False
+    env.git_branch = 'master'
+    env.hosts = ['oberon.sublab.org']
+    env.home = '/home/subweb'
+    env.root = join_path(env.home, 'production')
+    finalize()
+
+
+def finalize():
+    """Performs the final setup.
+    """
+    env.config = join_path(env.home, 'config')
+    env.src_root = join_path(env.root, 'subweb')
+    env.pip_file = join_path(env.src_root, 'requirements.txt')
+    env.proj_root = join_path(env.src_root, 'sublab_project')
+    env.manage_py = join_path(env.proj_root, 'manage.py')
-- 
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