add PIRegularExpression

3rd/pcre2/maint/UpdateDates.py

@@ -0,0 +1,57 @@
+#! /usr/bin/env python3
+
+# Script to update all the hardcoded dates in the source tree.
+#  - Documentation manpages have a "last updated" header and footer.
+#  - So do the READMEs.
+#  - The source files have copyright headers.
+
+# This script should be run in the main PCRE2 directory.
+
+import glob
+import re
+import subprocess
+
+from UpdateCommon import update_file
+
+date_regex = r'\d+ (Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\w* \d+'
+header_regex = r'(?m)^(.TH.*? )"%s"' % date_regex
+last_updated_regex = r'(?m)^Last updated: %s' % date_regex
+
+def get_last_date(filename):
+    result = subprocess.run(['git', 'log', '-n1', '--date=format:%d %B %Y', '--format=%cd', '--grep', '#noupdate', '--invert-grep', filename], capture_output=True, text=True)
+    return result.stdout.strip()
+
+def check_no_match(filename, pattern):
+    with open(filename, 'r') as file:
+        content = file.read()
+
+    if re.search(pattern, content):
+        raise Exception('Pattern unexpectedly found in %s' % filename)
+
+def update_man_date(filename):
+    print('  Updating %s' % filename)
+    file_date = get_last_date(filename)
+
+    update_file(filename, header_regex, '\\1"%s"' % file_date)
+
+    if filename.startswith('doc/pcre2_') or filename == 'doc/pcre2demo.3':
+        check_no_match(filename, last_updated_regex)
+    else:
+        update_file(filename, last_updated_regex, 'Last updated: %s' % file_date)
+
+print('Updating man pages')
+
+# doc/*.1
+for filename in glob.glob('doc/*.1'):
+    update_man_date(filename)
+
+# doc/*.3
+for filename in glob.glob('doc/*.3'):
+    update_man_date(filename)
+
+# README, NON-AUTOTOOLS-BUILD
+print('Updating README and NON-AUTOTOOLS-BUILD')
+for filename in ['README', 'NON-AUTOTOOLS-BUILD']:
+    line = 'Last updated: %s' % get_last_date(filename)
+    padding = '=' * len(line)
+    update_file(filename, r'(?i)=+\nLast updated: .*?\n=+', '%s\n%s\n%s' % (padding, line, padding))