Add CLI arguments

fioul.py

@@ -2,9 +2,11 @@
 
 # from bottle import hook, request, route, run, static_file, view
 
+from argparse import ArgumentParser
 from datetime import date
 from models import Price, IntegrityError
 
+
 import requests
 import json
 
@@ -43,10 +45,46 @@ def store_current_price():
     return price
 
 
-def main():
-    print(get_price())
+# ----------------------------------------------------------------------
+# Argument parsing
+# use a decorator to simplify argparse usage, as suggested by
+# https://mike.depalatis.net/blog/simplifying-argparse.html
+
+cli = ArgumentParser(description="Balises")
+subparsers = cli.add_subparsers(dest="subcommand")
+
+
+def subcommand(args=[], parent=subparsers):
+    def decorator(func):
+        parser = parent.add_parser(func.__name__, description=func.__doc__)
+        for arg in args:
+            parser.add_argument(*arg[0], **arg[1])
+        parser.set_defaults(func=func)
+
+    return decorator
+
+
+@subcommand()
+def update(args):
     store_current_price()
 
 
+@subcommand()
+def show(args):
+    print(get_price())
+
+
+# ----------------------------------------------------------------------
+# Main
+
+
+def main():
+    args = cli.parse_args()
+    if args.subcommand is None:
+        cli.print_help()
+    else:
+        args.func(args)
+
+
 if __name__ == "__main__":
     main()