time-zone: T1906: migrate to XML/Python

The current node.def based implementtion should be migrated from
vyatta-cfg-system to vyos-1x. During the migration also provide a migration
script which transforms some ole timezones like "Los_Angeles" into a proper
IANA assigned timezone which should be "America/Los_Angeles".

1 files changed, 56 insertions, 0 deletions

diff --git a/src/migration-scripts/system/12-to-13 b/src/migration-scripts/system/12-to-13
new file mode 100755
index 000000000..deb17e44a
--- /dev/null
+++ b/src/migration-scripts/system/12-to-13
@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+
+# Fixup non existent time-zones. Some systems have time-zone set to:
+# - Los* (Los_Angeles)
+# - Den* (Denver)
+# ... but thos are no real IANA assigned time zones. In the past the have been
+# silently remapped. Time to clean it up!
+
+import re
+import sys
+
+from vyos.configtree import ConfigTree
+
+if (len(sys.argv) < 1):
+    print("Must specify file name!")
+    sys.exit(1)
+
+file_name = sys.argv[1]
+
+with open(file_name, 'r') as f:
+    config_file = f.read()
+
+config = ConfigTree(config_file)
+tz_base = ['system', 'time-zone']
+if not config.exists(tz_base):
+    # Nothing to do
+    sys.exit(0)
+else:
+    tz = config.return_value(tz_base)
+
+    if re.match(r'[Ll][Oo][Ss].+', tz):
+        tz = 'America/Los_Angeles'
+    elif re.match(r'[Dd][Ee][Nn].+', tz):
+        tz = 'America/Denver'
+    elif re.match(r'[Hh][Oo][Nn][Oo].+', tz):
+        tz = 'Pacific/Honolulu'
+    elif re.match(r'[Nn][Ee][Ww].+', tz):
+        tz = 'America/New_York'
+    elif re.match(r'[Cc][Hh][Ii][Cc]*.+', tz):
+        tz = 'America/Chicago'
+    elif re.match(r'[Aa][Nn][Cc].+', tz):
+        tz = 'America/Anchorage'
+    elif re.match(r'[Pp][Hh][Oo].+', tz):
+        tz = 'America/Phoenix'
+    elif re.match(r'GMT(.+)?', tz):
+        tz = 'Etc/' + tz
+
+    # replace timezone data is required
+    config.set(tz_base, value=tz)
+
+    try:
+        with open(file_name, 'w') as f:
+            f.write(config.to_string())
+    except OSError as e:
+        print("Failed to save the modified config: {}".format(e))
+        sys.exit(1)