1 files changed, 15 insertions, 1 deletions
diff --git a/gerbonara/cli.py b/gerbonara/cli.py
index 93b989e..5b67da8 100644
--- a/gerbonara/cli.py
+++ b/gerbonara/cli.py
@@ -23,8 +23,10 @@ import dataclasses
 import re
 import warnings
 import json
+import sys
 import itertools
 import webbrowser
+import warnings
 from pathlib import Path
 
 from .utils import MM, Inch
@@ -37,6 +39,18 @@ from .cad.kicad import tmtheme
 from .cad import protoserve
 
 
+def _showwarning(message, category, filename, lineno, file=None, line=None):
+    if file is None:
+        file = sys.stderr
+
+    filename = Path(filename)
+    gerbonara_module_install_location = Path(__file__).parent.parent
+    if filename.is_relative_to(gerbonara_module_install_location):
+        filename = filename.relative_to(gerbonara_module_install_location)
+
+    print(f'{filename}:{lineno}: {message}', file=file)
+warnings.showwarning = _showwarning
+
 def _print_version(ctx, param, value):
     if value and not ctx.resilient_parsing:
         click.echo(f'Version {__version__}')
@@ -431,7 +445,7 @@ def merge(inpath, outpath, offset, rotation, input_map, command_line_units, outp
 @click.option('--version', is_flag=True, callback=_print_version, expose_value=False, is_eager=True)
 @click.option('--warnings', 'format_warnings', type=click.Choice(['default', 'ignore', 'once']), default='default',
               help='''Enable or disable file format warnings during parsing (default: on)''')
-@click.option('--units', type=Unit(), help='Output bounding box in this unit (default: millimeter)')
+@click.option('--units', type=Unit(), default='metric', help='Output bounding box in this unit (default: millimeter)')
 @click.option('--input-number-format', help='Override number format of input file (mostly useful for Excellon files)')
 @click.option('--input-units', type=Unit(), help='Override units of input file')
 @click.option('--input-zero-suppression', type=click.Choice(['off', 'leading', 'trailing']), help='Override zero suppression setting of input file')