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[redakcja.git] / fabfile.py

diff --git a/fabfile.py b/fabfile.py
index 404ec52..5a9d404 100644 (file)
--- a/fabfile.py
+++ b/fabfile.py
@@ -1,13 +1,159 @@
-from __future__ import with_statement
+from __future__ import with_statement # needed for python 2.5
+from fabric.api import *
+from fabric.contrib import files

 
 

-from fabric.api import run, env, cd
+import os

 
 

+
+# ==========
+# = Config =
+# ==========
+# Globals
+env.project_name = 'platforma'
+env.use_south = False
+
+# Servers

 def staging():
 def staging():

-    '''Add staging server to hosts'''
-    env.hosts += ['platforma@stigma.nowoczesnapolska.org.pl:2222']
+    """Use staging server"""
+    env.hosts = ['stigma.nowoczesnapolska.org.pl:2222']
+    env.user = 'platforma'
+    env.path = '/var/services/platforma'
+    env.python = '/usr/bin/python'
+    env.virtualenv = '/usr/bin/virtualenv'
+    env.pip = '/usr/bin/pip'
+    
+def production():
+    """Use production server"""
+    env.hosts = ['wolnelektury.pl:22123']
+    env.user = 'fundacja'
+    env.path = '/opt/lektury/platforma'
+    env.python = '/opt/lektury/basevirtualenv/bin/python'
+    env.virtualenv = '/opt/lektury/basevirtualenv/bin/virtualenv'
+    env.pip = '/opt/lektury/basevirtualenv/bin/pip'
+
+
+# =========
+# = Tasks =
+# =========
+def test():
+    "Run the test suite and bail out if it fails"
+    require('hosts', 'path', provided_by=[staging, production])
+    result = run('cd %(path)s/%(project_name)s; %(python)s manage.py test' % env)
+
+def setup():
+    """
+    Setup a fresh virtualenv as well as a few useful directories, then run
+    a full deployment. virtualenv and pip should be already installed.
+    """
+    require('hosts', 'path', provided_by=[staging, production])
+
+    run('mkdir -p %(path)s; cd %(path)s; %(virtualenv)s --no-site-packages .;' % env, pty=True)
+    run('cd %(path)s; mkdir releases; mkdir shared; mkdir packages;' % env, pty=True)
+    run('cd %(path)s/releases; ln -s . current; ln -s . previous' % env, pty=True)
+    deploy()

 
 def deploy():
 
 def deploy():

-    '''Deploy server'''
-    with cd('platforma'):
-        run('git pull')
-        run('./project/manage.py syncdb')
+    """
+    Deploy the latest version of the site to the servers, 
+    install any required third party modules, 
+    install the virtual host and then restart the webserver
+    """
+    require('hosts', 'path', provided_by=[staging, production])
+
+    import time
+    env.release = time.strftime('%Y-%m-%dT%H%M')
+
+    upload_tar_from_git()
+    upload_wsgi_script()
+    upload_vhost_sample()
+    install_requirements()
+    copy_localsettings()
+    symlink_current_release()
+    migrate()
+    restart_webserver()
+
+def deploy_version(version):
+    "Specify a specific version to be made live"
+    require('hosts', 'path', provided_by=[localhost,webserver])
+    env.version = version
+    with cd(env.path):
+        run('rm releases/previous; mv releases/current releases/previous;', pty=True)
+        run('ln -s %(version)s releases/current' % env, pty=True)
+    restart_webserver()
+
+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 upload_vhost_sample():
+    "Create and upload Apache virtual host configuration sample"
+    print ">>> upload vhost sample"
+    files.upload_template('%(project_name)s.vhost.template' % env, '%(path)s/%(project_name)s.vhost.sample' % env, context=env)
+
+def upload_wsgi_script():
+    "Create and upload a wsgi script sample"
+    print ">>> upload wsgi script sample"
+    files.upload_template('%(project_name)s.wsgi.template' % env, '%(path)s/%(project_name)s.wsgi' % env, context=env)
+    run('chmod ug+x %(path)s/%(project_name)s.wsgi' % env)
+
+def install_requirements():
+    "Install the required packages from the requirements file using pip"
+    print '>>> install requirements'
+    require('release', provided_by=[deploy])
+    run('cd %(path)s; %(pip)s install -E . -r %(path)s/releases/%(release)s/requirements.txt' % env, pty=True)
+    
+def copy_localsettings():
+    "Copy localsettings.py from root directory to release directory (if this file exists)"
+    print ">>> copy localsettings"
+    require('release', provided_by=[deploy])
+    require('path', provided_by=[staging, production])
+
+    with settings(warn_only=True):
+        run('cp %(path)s/localsettings.py %(path)s/releases/%(release)s/%(project_name)s' % 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)
+
+def migrate():
+    "Update the database"
+    print '>>> migrate'
+    require('project_name', provided_by=[staging, production])
+    with cd('%(path)s/releases/current/%(project_name)s' % env):
+        run('../../../bin/python manage.py syncdb --noinput' % env, pty=True)
+        if env.use_south:
+            run('../../../bin/python manage.py migrate' % env, pty=True)
+
+def restart_webserver():
+    "Restart the web server"
+    print '>>> restart webserver'
+    run('touch %(path)s/releases/current/%(project_name)s/%(project_name)s.wsgi' % env)