Create umount module

settings.conf

@@ -34,6 +34,7 @@ install:
 - locale
 - keyboard
 #- users
+- umount
 
 # Phase 3 - postinstall.
 # View modules are shown as UI pages, jobs from job modules are executed immediately in

src/modules/umount/main.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+# encoding: utf-8
+# === This file is part of Calamares - <http://github.com/calamares> ===
+#
+#   Copyright 2014, Aurélien Gâteau <agateau@kde.org>
+#
+#   Calamares is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation, either version 3 of the License, or
+#   (at your option) any later version.
+#
+#   Calamares is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with Calamares. If not, see <http://www.gnu.org/licenses/>.
+
+import os
+import subprocess
+
+import libcalamares
+
+
+def listMounts( rootMountPoint ):
+    lst = []
+    for line in open( "/etc/mtab" ).readlines():
+        device, mountPoint, _ = line.split( " ", 2 )
+        if mountPoint.startswith( rootMountPoint ):
+            lst.append( ( device, mountPoint ) )
+    return lst
+
+
+def calamares_main():
+    rootMountPoint = libcalamares.global_storage.value( "rootMountPoint" )
+    if not rootMountPoint:
+        return "GlobalStorage does not contain a \"rootMountPoint\" key, doing nothing"
+    if not os.path.exists( rootMountPoint ):
+        return "GlobalStorage[\"rootMountPoint\"] is \"{}\", which does not exist, doing nothing".format( rootMountPoint )
+
+    lst = listMounts( rootMountPoint )
+    # Sort the list by mount point in decreasing order. This way we can be sure
+    # we unmount deeper dirs first.
+    lst.sort( key = lambda x: x[ 1 ], reverse = True )
+
+    for device, mountPoint in lst:
+        subprocess.check_call( [ "umount", mountPoint ] )
+
+    os.rmdir( rootMountPoint )
+    return "All done"

src/modules/umount/module.conf

@@ -0,0 +1,6 @@
+type:       "job"
+name:       "umount"
+interface:  "python"
+requires:   []
+script:     "main.py"
+configuration: