restructure this a bit, and timezone done

aif.xsd

@@ -1058,9 +1058,7 @@
                                 </xs:complexType>
                             </xs:element>
                         </xs:all>
-                        <xs:attribute name="timezone" type="aif:t_nonempty" use="required"/>
-                        <xs:attribute name="chrootPath" type="aif:t_filepath" use="required"/>
-                        <xs:attribute name="reboot" type="xs:boolean" use="optional" default="0"/>
+                        <xs:attribute name="timezone" type="aif:t_nonempty" use="optional" default="UTC"/>
                     </xs:complexType>
                 </xs:element>
                 <!-- END SYSTEM -->
@@ -1165,6 +1163,8 @@
                 <!-- END SCRIPTS -->
             </xs:all>
             <xs:attribute name="version" type="aif:t_nonempty" use="optional" default="master"/>
+            <xs:attribute name="chrootPath" type="aif:t_filepath" use="required"/>
+            <xs:attribute name="reboot" type="xs:boolean" use="optional" default="false"/>
         </xs:complexType>
     </xs:element>
 </xs:schema>

aif/system/__init__.py

@@ -2,3 +2,7 @@ from . import locales
 from . import console
 from . import users
 from . import services
+
+
+def main(system_xml):
+    pass

aif/system/locales.py

@@ -105,3 +105,23 @@ class Locale(object):
         os.chmod(cfg, 0o0644)
         os.chown(cfg, 0, 0)
         return()
+
+
+class Timezone(object):
+    def __init__(self, timezone):
+        self.tz = timezone.strip().replace('.', '/')
+
+    def _verify(self, chroot_base):
+        tzfilebase = os.path.join('usr', 'share', 'zoneinfo', self.tz)
+        tzfile = os.path.join(chroot_base, tzfilebase)
+        if not os.path.isfile(tzfile):
+            raise ValueError('Invalid timezone')
+        return(tzfilebase)
+
+    def apply(self, chroot_base):
+        tzsrcfile = os.path.join('/', self._verify(chroot_base))
+        tzdestfile = os.path.join(chroot_base, 'etc', 'localtime')
+        if os.path.isfile(tzdestfile):
+            os.remove(tzdestfile)
+        os.symlink(tzsrcfile, tzdestfile)
+        return()

aif/system/main.py

@@ -1 +0,0 @@
-# TODO

examples/aif.xml

@@ -2,7 +2,9 @@
 <aif xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns="http://aif-ng.io/"
      xsi:schemaLocation="http://aif-ng.io/ http://aif-ng.io/aif.xsd"
-     version="v2_rewrite"><!-- When we release, this should match the tagged release (e.g. 0.2.0) -->
+     version="v2_rewrite"
+     chrootPath="/mnt/aif"
+     reboot="false"><!-- When we release, this should match the tagged release (e.g. 0.2.0) -->
     <storage>
         <blockDevices>
             <disk id="sda" device="/dev/sda" diskFormat="gpt">
@@ -162,7 +164,7 @@
             </encryption>
         </wireless>
     </network>
-    <system timezone="EST5EDT" chrootPath="/mnt/aif" reboot="0">
+    <system timezone="EST5EDT">
         <rootPassword>
             <passwordPlain>1ns3cur3p4ssw0rd</passwordPlain>
         </rootPassword>