Allow space in git commit-mklog args

contrib/ChangeLog:

	* git-commit-mklog.py: Do not parse -b argument.
	Pass mklog_args as json environment variable.
	* mklog.py: Parse GCC_MKLOG_ARGS and append it to sys.argv.
	* prepare-commit-msg: Do not append GCC_MKLOG_ARGS to args.

contrib/git-commit-mklog.py

@@ -24,6 +24,7 @@
 # to mklog.py script.
 
 import argparse
+import json
 import os
 import subprocess
 
@@ -32,8 +33,7 @@ if __name__ == '__main__':
     myenv = os.environ.copy()
 
     parser = argparse.ArgumentParser(description='git-commit-mklog wrapped')
-    parser.add_argument('-b', '--pr-numbers', action='store',
-                        type=lambda arg: arg.split(','), nargs='?',
+    parser.add_argument('-b', '--pr-numbers',
                         help='Add the specified PRs (comma separated)')
     parser.add_argument('-p', '--fill-up-bug-titles', action='store_true',
                         help='Download title of mentioned PRs')
@@ -44,12 +44,13 @@ if __name__ == '__main__':
     myenv['GCC_FORCE_MKLOG'] = '1'
     mklog_args = []
     if args.pr_numbers:
-        mklog_args.append(f'-b {",".join(args.pr_numbers)}')
+        mklog_args += ['-b', args.pr_numbers]
     if args.fill_up_bug_titles:
         mklog_args.append('-p')
 
     if mklog_args:
-        myenv['GCC_MKLOG_ARGS'] = ' '.join(mklog_args)
+        # wrap mklog arguments with JSON
+        myenv['GCC_MKLOG_ARGS'] = json.dumps(mklog_args)
 
     if args.co:
         for author in args.co.split(','):

contrib/mklog.py

@@ -28,6 +28,7 @@
 
 import argparse
 import datetime
+import json
 import os
 import re
 import subprocess
@@ -332,6 +333,10 @@ def skip_line_in_changelog(line):
 
 
 if __name__ == '__main__':
+    extra_args = os.getenv('GCC_MKLOG_ARGS')
+    if extra_args:
+        sys.argv += json.loads(extra_args)
+
     parser = argparse.ArgumentParser(description=help_message)
     parser.add_argument('input', nargs='?',
                         help='Patch file (or missing, read standard input)')

contrib/prepare-commit-msg

@@ -78,4 +78,4 @@ else
     tee="cat"
 fi
 
-git $cmd | $tee | git gcc-mklog $GCC_MKLOG_ARGS -c "$COMMIT_MSG_FILE"
+git $cmd | $tee | git gcc-mklog -c "$COMMIT_MSG_FILE"