meson: replace sh+find with an internal glob in the python helper

As suggested in https://github.com/systemd/systemd/pull/22810#discussion_r831708052

This makes the whole thing simpler. A glob is passed to helper which then resolves
it on its own. This way it's trivial to call the helper with a different
set of files for testing.

1 files changed, 15 insertions, 6 deletions

diff --git a/tools/update-man-rules.py b/tools/update-man-rules.py
index 31ed91c432..3a8c31dc35 100755
--- a/tools/update-man-rules.py
+++ b/tools/update-man-rules.py
@@ -3,9 +3,10 @@
 
 from __future__ import print_function
 import collections
+import glob
 import sys
+from pathlib import Path
 import pprint
-from os.path import basename
 from xml_helper import xml_parse
 
 def man(page, number):
@@ -56,7 +57,8 @@ manpages = ['''
 
 MESON_FOOTER = '''\
 ]
-# Really, do not edit.'''
+# Really, do not edit.
+'''
 
 def make_mesonfile(rules, dist_files):
     # reformat rules as
@@ -76,13 +78,20 @@ def make_mesonfile(rules, dist_files):
     return '\n'.join((MESON_HEADER, pprint.pformat(lines)[1:-1], MESON_FOOTER))
 
 if __name__ == '__main__':
-    pages = sys.argv[1:]
+    source_glob = sys.argv[1]
+    target = Path(sys.argv[2])
+
+    pages = glob.glob(source_glob)
     pages = (p for p in pages
-             if basename(p) not in {
+             if Path(p).name not in {
                      'systemd.directives.xml',
                      'systemd.index.xml',
                      'directives-template.xml'})
 
     rules = create_rules(pages)
-    dist_files = (basename(p) for p in pages)
-    print(make_mesonfile(rules, dist_files))
+    dist_files = (Path(p).name for p in pages)
+    text = make_mesonfile(rules, dist_files)
+
+    tmp = target.with_suffix('.tmp')
+    tmp.write_text(text)
+    tmp.rename(target)