Pluginify strategies.

[wizard.git] / plugins / scripts / wizard_scripts.py

diff --git a/plugins/scripts/wizard_scripts.py b/plugins/scripts/wizard_scripts.py
index b62f28cce8dea4a9c0d380ad4b2297413d289362..10118c89ac4dfeab79933fc338b2859018f1adb4 100644 (file)
--- a/plugins/scripts/wizard_scripts.py
+++ b/plugins/scripts/wizard_scripts.py
@@ -9,9 +9,10 @@ import logging
 import urlparse
 import time
 import errno
+import sqlalchemy
 
 import wizard
-from wizard import shell, util, user
+from wizard import deploy, shell, install, util, user
 
 def deploy_web(dir):
     # try the directory
@@ -113,7 +114,7 @@ def sql_auth(url):
     return None
 
 def user_email(name):
-    # XXX: simplistic strategy which doesn't work most of the time
+    # XXX: simplistic install which doesn't work most of the time
     return "%s@scripts.mit.edu" % name
 
 def user_operator():
@@ -150,3 +151,44 @@ def user_passwd(dir, uid):
     name, password, uid, gid, gecos, homedir, console = result.split(":")
     realname = gecos.split(",")[0]
     return user.Info(name, uid, gid, realname, homedir, console)
+
+class MysqlStrategy(install.Strategy):
+    """
+    Performs scripts specific guesses for MySQL variables.  This
+    may create an appropriate database for the user.
+    """
+    side_effects = True
+    provides = frozenset(["dsn"])
+    def prepare(self):
+        """Uses the SQL programs in the scripts locker"""
+        if self.application.database != "mysql":
+            raise install.StrategyFailed
+        try:
+            self._triplet = shell.eval("/mit/scripts/sql/bin/get-password").split()
+        except shell.CallError:
+            raise install.StrategyFailed
+        if len(self._triplet) != 3:
+            raise install.StrategyFailed
+        self._username = os.getenv('USER')
+        if self._username is None:
+            raise install.StrategyFailed
+    def execute(self, options):
+        """Creates a new database for the user using ``get-next-database`` and ``create-database``."""
+        host, username, password = self._triplet
+        # race condition
+        name = shell.eval("/mit/scripts/sql/bin/get-next-database", os.path.basename(self.dir))
+        database = shell.eval("/mit/scripts/sql/bin/create-database", name)
+        options.dsn = sqlalchemy.engine.url.URL("mysql", username=username, password=password, host=host, database=database)
+
+class EmailStrategy(install.Strategy):
+    """Performs script specific guess for email."""
+    provides = frozenset(["email"])
+    def prepare(self):
+        """Uses :envvar:`USER` and assumes you are an MIT affiliate."""
+        # XXX: This might be buggy, because locker might be set to USER
+        self._user = os.getenv("USER")
+        if self._user is None:
+            raise install.StrategyFailed
+    def execute(self, options):
+        """No-op."""
+        options.email = self._user + "@mit.edu"