1 files changed, 94 insertions, 0 deletions
diff --git a/packaging/year-tweak b/packaging/year-tweak
new file mode 100755
index 0000000..69d2f2f
--- /dev/null
+++ b/packaging/year-tweak
@@ -0,0 +1,94 @@
+#!/usr/bin/env python3
+
+# This uses the output from "support/git-set-file-times --list" to discern
+# the last-modified year of each *.c & *.h file and updates the copyright
+# year if it isn't set right.
+
+import sys, os, re, argparse, subprocess
+from datetime import datetime
+
+MAINTAINER_NAME = 'Wayne Davison'
+MAINTAINER_SUF = ' ' + MAINTAINER_NAME + "\n"
+
+def main():
+    latest_year = '2000'
+
+    proc = subprocess.Popen('support/git-set-file-times --list'.split(), stdout=subprocess.PIPE, encoding='utf-8')
+    for line in proc.stdout:
+        m = re.match(r'^\S\s+(?P<year>\d\d\d\d)\S+\s+\S+\s+(?P<fn>.+)', line)
+        if not m:
+            print("Failed to parse line from git-set-file-times:", line)
+            sys.exit(1)
+        m = argparse.Namespace(**m.groupdict())
+        if m.year > latest_year:
+            latest_year = m.year
+        if m.fn.startswith('zlib/') or m.fn.startswith('popt/'):
+            continue
+        if re.search(r'\.(c|h|sh|test)$', m.fn):
+            maybe_edit_copyright_year(m.fn, m.year)
+    proc.communicate()
+
+    fn = 'latest-year.h'
+    with open(fn, 'r', encoding='utf-8') as fh:
+        old_txt = fh.read()
+
+    txt = f'#define LATEST_YEAR "{latest_year}"\n'
+    if txt != old_txt:
+        print(f"Updating {fn} with year {latest_year}")
+        with open(fn, 'w', encoding='utf-8') as fh:
+            fh.write(txt)
+
+
+def maybe_edit_copyright_year(fn, year):
+    opening_lines = [ ]
+    copyright_line = None
+
+    with open(fn, 'r', encoding='utf-8') as fh:
+        for lineno, line in enumerate(fh):
+            opening_lines.append(line)
+            if lineno > 3 and not re.search(r'\S', line):
+                break
+            m = re.match(r'^(?P<pre>.*Copyright\s+\S+\s+)(?P<year>\d\d\d\d(?:-\d\d\d\d)?(,\s+\d\d\d\d)*)(?P<suf>.+)', line)
+            if not m:
+                continue
+            copyright_line = argparse.Namespace(**m.groupdict())
+            copyright_line.lineno = len(opening_lines)
+            copyright_line.is_maintainer_line = MAINTAINER_NAME in copyright_line.suf
+            copyright_line.txt = line
+            if copyright_line.is_maintainer_line:
+                break
+
+        if not copyright_line:
+            return
+
+        if copyright_line.is_maintainer_line:
+            cyears = copyright_line.year.split('-')
+            if year == cyears[0]:
+                cyears = [ year ]
+            else:
+                cyears = [ cyears[0], year ]
+            txt = copyright_line.pre + '-'.join(cyears) + MAINTAINER_SUF
+            if txt == copyright_line.txt:
+                return
+            opening_lines[copyright_line.lineno - 1] = txt
+        else:
+            if fn.startswith('lib/') or fn.startswith('testsuite/'):
+                return
+            txt = copyright_line.pre + year + MAINTAINER_SUF
+            opening_lines[copyright_line.lineno - 1] += txt
+
+        remaining_txt = fh.read()
+
+    print(f"Updating {fn} with year {year}")
+
+    with open(fn, 'w', encoding='utf-8') as fh:
+        fh.write(''.join(opening_lines))
+        fh.write(remaining_txt)
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser(description="Grab the year of last mod for our c & h files and make sure the Copyright comment is up-to-date.")
+    args = parser.parse_args()
+    main()
+
+# vim: sw=4 et