parse args with argparse

pre_commit_hooks/safety_check.py

@@ -1,19 +1,47 @@
 from __future__ import print_function
+
+import argparse
 import sys
+
 from safety.cli import check
 
 
+def _parser():
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "--full-report",
+        default="--full-report",
+        const="--full-report",
+        action="store_const",
+    )
+    parser.add_argument(
+        "--short-report",
+        dest="full_report",
+        const="--short-report",
+        action="store_const",
+    )
+    parser.add_argument("--ignore", "-i", action="append")
+    parser.add_argument("files", nargs="+")
+    return parser
+
+
 def main(argv=None):
-    if argv is None:
-        argv = sys.argv[1:]
+    parsed_args, rest = _parser().parse_known_args(argv)
+    ignore = [
+        arg
+        for vs in parsed_args.ignore or []
+        for code in vs.split(",")
+        for arg in ("--ignore", code.strip())
+    ]
+    files = [arg for f in parsed_args.files for arg in ("--file", f)]
+    args = [parsed_args.full_report] + ignore + files + rest
     try:
-        check.main(['--full-report'] + sum(([arg] if arg.startswith('-') else ['--file', arg] for arg in argv), []))
-        return 0
+        check.main(args)
     except SystemExit as error:
         if error.code == 0:
             return 0
-        return 1
+    return 1
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     sys.exit(main())