cli: fix --output-signature and --output-certificate (#133)

* cli: fix `--output-signature` and `--output-certificate`

Signed-off-by: William Woodruff <william@trailofbits.com>

* sigstore: 0.6.1

Signed-off-by: William Woodruff <william@trailofbits.com>

Author: woodruffw

sigstore/__init__.py

@@ -16,4 +16,4 @@
 The `sigstore` APIs.
 """
 
-__version__ = "0.6.0"
+__version__ = "0.6.1"

sigstore/_cli.py

@@ -283,7 +283,7 @@ def _sign(args: argparse.Namespace) -> None:
             args._parser.error(f"Input must be a file: {file}")
 
         sig, cert = args.output_signature, args.output_certificate
-        if not args.no_default_files:
+        if not sig and not cert and not args.no_default_files:
             sig = file.parent / f"{file.name}.sig"
             cert = file.parent / f"{file.name}.crt"