New article on fcron to cron migration

1 files changed, 68 insertions, 0 deletions

diff --git a/content/resources/fcron2cron.py b/content/resources/fcron2cron.py
new file mode 100644
index 0000000..26bd4e1
--- /dev/null
+++ b/content/resources/fcron2cron.py
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+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import sys
+import subprocess
+import os
+
+FCRON_LIST="/var/spool/fcron"
+
+def transform_variable(variables):
+    """ Transform a list of variables like
+    bootrun(true),nice(15),serial(true)
+    """
+
+    variable_operators = {
+            'mail': lambda x: x == "false" and 'MAILTO=""' or "",
+            'mailto': lambda x : 'MAILTO="%s"' %x,
+
+        }
+
+    transforms = ""
+
+    for variable in variables.split(","):
+        attribute, value = variable.split('(')
+        transforms += variable_operators.get(attribute, lambda x:"")(value[:-1])
+    return transforms
+
+def transform_directive(line):
+    operators = {
+            'hourly':       ('@hourly', 2),
+            'midhourly':    ('@hourly', 2),
+            'daily':        ('@daily',  3),
+            'middaily':     ('@daily',  3),
+            'nightly':      ('@daily',  3),
+            'weekly':       ('@weekly', 3),
+            'midweekly':    ('@weekly', 3),
+            'montly':       ('@montly', 4),
+            'midmonthly':   ('@montly', 4),
+        }
+    operator = line.split(" ")[0].split(',')[0]
+    substitute, to_trim = operators.get(operator, ("", 0))
+    return "%s\t%s" %(substitute, line.split(None, to_trim)[to_trim])
+
+def transform(line):
+    if line == '':
+        return ''
+    transformation = {
+            '!': lambda x:transform_variable(x[1:]),
+            '%': lambda x:transform_directive(x[1:]),
+            '&': lambda x: x.split(None, 1)[1],
+            }
+    return transformation.get(line[0], lambda x:x)(line)
+
+def main(parameters):
+    configs = os.listdir(FCRON_LIST)
+    for config in configs:
+        process = subprocess.Popen(["fcrontab", "-l", config], universal_newlines=True, stdout=subprocess.PIPE)
+        f = open('%s.crontab' % config, 'w')
+        for line in process.stdout:
+            transformation = transform(line.strip().expandtabs(1))
+            if transformation is not None:
+                f.write("%s\n" % transformation)
+        f.close()
+
+
+if __name__ == "__main__":
+    main(sys.argv)
+