Script for module file path fixing

operations/ensure_prepend.py

+#!/usr/bin/env python
+# encoding:utf8
+"""
+Filter to modify `setenv` statements in modulefiles to `prepend-path` statements.
+
+Usage:
+    tools/ensure_prepend.py PATH MANPATH PYTHONPATH <../build.52.VGk/test.mod
+or
+    module sh-to-mod bash somescript.sh | ensure_prepend.py PATH MANPATH PYTHONPATH > path/to/module
+"""
+
+import logging
+import os
+import re
+import sys
+
+logging.basicConfig(level=logging.DEBUG)
+log = logging.getLogger()
+
+def main():
+    names = sys.argv[1:]
+    log.debug("rewriting %s", names)
+
+    bad_re = re.compile(r'^setenv\s+(?P<varname>[a-zA-Z_0-9]+)\s+(?P<value>.*)')
+    for line in sys.stdin:
+        match = bad_re.match(line)
+        if not match or match.group('varname') not in names:
+            print(line, end='')
+            continue
+        log.debug("found bad line: %s", line.rstrip("\n"))
+        name = match.group("varname")
+        log.debug("name %s", name)
+        value = match.group("value")
+        log.debug("value %s", value)
+        parts = value.split(":")
+        log.debug("parts %s", parts)
+        have = os.environ.get(name, "").split(':')
+        log.debug("have %s", have)
+
+        print(f"prepend-path    {name} " + ":".join([p for p in parts if p not in have]))
+
+
+if __name__ == '__main__':
+    main()