OpenDKIM setup. (#196)

* OpenDKIM setup.

see #173

* Fixed unit tests.

* Fixed mysql syntax.

modoboa_installer/scripts/opendkim.py

@@ -0,0 +1,78 @@
+"""OpenDKIM related tools."""
+
+import os
+import pwd
+import stat
+
+from .. import database
+from .. import package
+from .. import utils
+
+from . import base
+
+
+class Opendkim(base.Installer):
+    """OpenDKIM installer."""
+
+    appname = "opendkim"
+    packages = {
+        "deb": ["opendkim"],
+        "rpm": ["opendkim"]
+    }
+    config_files = ["opendkim.conf", "opendkim.hosts"]
+
+    def get_packages(self):
+        """Additional packages."""
+        packages = super(Opendkim, self).get_packages()
+        if package.backend.FORMAT == "deb":
+            packages += ["libopendbx1-{}".format(self.db_driver)]
+        else:
+            dbengine = "postgresql" if self.dbengine == "postgres" else "mysql"
+            packages += ["opendbx-{}".format(dbengine)]
+        return packages
+
+    def install_config_files(self):
+        """Make sure config directory exists."""
+        user = self.config.get("opendkim", "user")
+        pw = pwd.getpwnam(user)
+        targets = [
+            [self.app_config["keys_storage_dir"], pw[2], pw[3]]
+        ]
+        for target in targets:
+            if not os.path.exists(target[0]):
+                utils.mkdir(
+                    target[0],
+                    stat.S_IRWXU | stat.S_IRGRP | stat.S_IXGRP |
+                    stat.S_IROTH | stat.S_IXOTH,
+                    target[1], target[2]
+                )
+        super(Opendkim, self).install_config_files()
+
+    def get_template_context(self):
+        """Additional variables."""
+        context = super(Opendkim, self).get_template_context()
+        context.update({
+            "db_driver": self.db_driver,
+            "db_name": self.config.get("modoboa", "dbname"),
+            "db_user": self.app_config["dbuser"],
+            "db_password": self.app_config["dbpassword"],
+            "port": self.app_config["port"],
+            "user": self.app_config["user"]
+        })
+        return context
+
+    def setup_database(self):
+        """Setup database."""
+        self.backend = database.get_backend(self.config)
+        self.backend.create_user(
+            self.app_config["dbuser"], self.app_config["dbpassword"]
+        )
+        dbname = self.config.get("modoboa", "dbname")
+        dbuser = self.config.get("modoboa", "dbuser")
+        dbpassword = self.config.get("modoboa", "dbpassword")
+        self.backend.load_sql_file(
+            dbname, dbuser, dbpassword,
+            self.get_file_path("dkim_view_{}.sql".format(self.dbengine))
+        )
+        self.backend.grant_right_on_table(
+            dbname, "dkim", self.app_config["dbuser"], "SELECT")