Move argparser creation to own procedure.

1 files changed, 13 insertions, 2 deletions

diff --git a/rainbow_parenthesis/__main__.py b/rainbow_parenthesis/__main__.py
index 51473c9..d600806 100644
--- a/rainbow_parenthesis/__main__.py
+++ b/rainbow_parenthesis/__main__.py
@@ -10,11 +10,22 @@ from . import term
 import argparse
 
 
-def main():
-    """Interactive entry point for the program."""
+def build_argparse() -> argparse.ArgumentParser:
+    """
+    Construct the argument parser for ``rainbow`` .
+
+    This is mostly a separate procedure to allow direct generation of
+    man pages.
+    """
     parser = argparse.ArgumentParser(prog='rainbow')
     parser.add_argument('input', type=argparse.FileType('r'),
                         nargs='?', default='-')
+    return parser
+
+
+def main():
+    """Interactive entry point for the program."""
+    parser = build_argparse()
     args = parser.parse_args()
 
     for item in colorize(args.input):