Initial support to upgrade a Mayan EDMS installation automatically

fabfile/__init__.py

@@ -7,6 +7,7 @@ import databases as database
 import platforms as platform
 import webservers as webserver
 import django
+import mayan_edms
 from conf import print_supported_configs
 from server_config import servers
 
@@ -46,7 +47,15 @@ def install():
     webserver.install_site()
     webserver.restart()
     platform.post_install()
-    
+
+
+@task
+def upgrade():
+    """
+    Perform a Mayan EDMS installation upgrade
+    """
+    mayan_edms.upgrade()
+
 
 @task
 def uninstall():

fabfile/mayan_edms/__init__.py

@@ -0,0 +1,50 @@
+from distutils.version import LooseVersion
+import importlib
+
+from fabric.api import env, task, cd, sudo, settings
+from fabric.colors import green, red
+
+from ..conf import setup_environment
+
+
+@task
+def upgrade():
+    """
+    Upgrade a Mayan EDMS installation, but doing incremental upgrades
+    """
+    setup_environment()
+    print(green('Upgrading Mayan EDMS database', bold=True))
+
+    with settings(warn_only=True):
+        with cd(env.virtualenv_path):
+            version = sudo('source bin/activate; python -c "import os;os.environ[\'DJANGO_SETTINGS_MODULE\']=\'mayan.settings\';from django.core.management import setup_environ;import settings;setup_environ(settings);import main;print main.__version__"')
+
+    if version.failed:
+        print(red('Unable to determined the current version.', bold=True))
+        exit()
+
+    current_verision = 'v%s' % version
+    print(green('Current version: %s' % version, bold=True))
+    
+    with settings(warn_only=True):
+        with cd(env.repository_name):
+            tags = sudo('git tag').split('\r\n')
+    
+    if tags.failed:
+        print(red('Upgrading is only support on git based installations.', bold=True))
+        exit()
+    
+    tags.sort(key=LooseVersion)
+
+    latest_version = tags[-1]
+    print(green('Latest version: %s' % latest_version, bold=True))
+
+    upgrade_steps = tags.index(latest_version) - tags.index(current_verision)
+    if not upgrade_steps:
+        print(green('Already in the latest version, no need to upgrade.', bold=True))
+        exit()
+    else:
+        print(green('Upgrade steps needed until latest version: %d' % (), bold=True))
+        version_module_name = current_verision.replace('.', '_')
+        module = importlib.import_module('fabfile.mayan_edms.upgrades.%s' % version_module_name)
+        module.upgrade()

fabfile/mayan_edms/upgrades/v0_12_2.py

@@ -0,0 +1,14 @@
+from fabric.api import env, task, cd, sudo, settings
+from fabric.colors import green, red
+
+from ..conf import setup_environment
+
+
+@task
+def upgrade():
+    """
+    Upgrade a Mayan EDMS installation from version v0.12.2 to v0.12.3
+    """
+    setup_environment()
+    print(green('Upgrading Mayan EDMS database from version 0.12.2 to 0.12.3', bold=True))
+    #TODO: upgrade steps