added postfix stack

ee/cli/plugins/postfixstack.py

@@ -0,0 +1,80 @@
+import os
+import sys
+from ee.core.variables import EEVariables
+from ee.core.aptget import EEAptGet
+from ee.core.apt_repo import EERepo
+from ee.cli.plugins.eestack import EEStack
+from ee.core.shellexec import EEShellExec
+from ee.core.shellexec import CommandExecutionError
+from ee.cli.main import app
+
+class EEPostfixStack(EEStack):
+    """
+        EasyEngine Postfix stack
+    """
+    packages_name = EEVariables.ee_postfix
+    log = app.log
+
+    def __init__(self, packages_name=None):
+        """
+        Initialize packages list in stack
+        pkgs_name : list of packages to be intialized for operations 
+                    in stack
+        """
+
+        self.packages_name = self._get_stack()  
+        super(EEPostfixStack, self).__init__(self.packages_name)
+
+    def _get_stack(self):
+        return EEPostfixStack.packages_name
+
+    def _add_repo(self):
+        """
+          Add repository for packages to be downloaded from
+        """
+        pass
+
+    def _pre_install_stack(self):
+        """
+        Defines pre-install activities done before installing hhvm stack
+        """
+        # Add hhvm repository
+        self._add_repo()
+
+        self.log.debug(self, "Pre-seeding Postfix")
+        try:
+            EEShellExec.cmd_exec(self, "echo \"postfix postfix"
+                                 "/main_mailer_type string \'Internet Site"
+                                 "\'\""
+                                 " | debconf-set-selections")
+            EEShellExec.cmd_exec(self, "echo \"postfix postfix/mailname"
+                                 " string $(hostname -f)\" | "
+                                 "debconf-set-selections")
+        except CommandExecutionError as e:
+            self.log.error(self, "Failed to intialize postfix package")
+
+    def _post_install_stack(self):
+        """
+        Defines activities done after installing hhvm stack
+        """
+        pass
+
+    def install_stack(self):
+        """
+        Install Postfix stack
+        """
+        self.log.info("Installing Postfix stack, please wait...")
+        self._pre_install_stack()
+        super(EEPostfixStack, self).install_stack()
+        self._post_install_stack()
+
+    def remove_stack(self):
+        """
+        Remove Postfix stack
+        """
+        self.log.info("Removing Postfix stack, please wait...")
+        super(EEPostfixStack, self).remove_stack()
+
+    def purge_stack(self):
+        self.log.info("Purging Postfix stack, please wait...")
+        super(EEPostfixStack, self).purge_stack()