fixed error with outputfile option

Author: datsom1

db_diff/cli.py

@@ -6,7 +6,7 @@
 @click.command(
     context_settings={"help_option_names": ["-h", "--help"]},
     help="Compare the differences between two CSV or JSON files.",
-    epilog="Example: db-diff old.csv new.csv --key=Id --output=jsonfile --filename=diff.json",
+    epilog="Example: db-diff old.csv new.csv --key=Id --output=jsonfile --outputfile=diff.json",
 )
 @click.argument(
     "previous",
@@ -56,7 +56,8 @@
     help="Output format. Available: (readable|json|jsonfile) (default: readable)",
 )
 @click.option(
-    "--filename",
+    "--outputfile",
+    "output_file",
     type=click.Path(file_okay=True, dir_okay=False, writable=True, resolve_path=True),
     default=None,
     help="File to write JSON output to (only used with --output=jsonfile)",
@@ -80,7 +81,7 @@ def cli(
 
     if output == "jsonfile" and not output_file:
         raise click.UsageError(
-            "--filename must be specified when --output=jsonfile (example: --filename=diff.json)",
+            "--outputfile must be specified when --output=jsonfile",
             ctx=click.get_current_context(),
         )