Improve help text for license url template option #759

Signed-off-by: Jonathan "Jono" Yang <jyang@nexb.com>

Author: JonoYang

src/scancode/cli.py

@@ -363,8 +363,8 @@ def validate_exclusive(ctx, exclusive_options):
               help='Do not return license matches with scores lower than this score. A number between 0 and 100.', group=SCANS, cls=ScanOption)
 @click.option('--license-text', is_flag=True, default=False,
               help='Include the detected licenses matched text. Has no effect unless --license is requested.', group=SCANS, cls=ScanOption)
-@click.option('--license-url-template', is_flag=False, default=DEJACODE_LICENSE_URL,
-              help='Change the base URL used for "reference_url" in the scan results', group=SCANS, cls=ScanOption)
+@click.option('--license-url-template', is_flag=False, default=DEJACODE_LICENSE_URL, show_default=True,
+              help='Set the template URL used for the license reference URLs. In a template URL, curly braces ({}) are replaced by the license key.', group=SCANS, cls=ScanOption)
 @click.option('--strip-root', is_flag=True, default=False,
               help='Strip the root directory segment of all paths. The default is to always '
                    'include the last directory segment of the scanned path such that all paths have a common root directory. '

tests/scancode/data/help/help.txt

@@ -20,8 +20,11 @@ Options:
                                  [default: 0]
     --license-text               Include the detected licenses matched text. Has
                                  no effect unless --license is requested.
-    --license-url-template TEXT  Change the base URL used for "reference_url" in
-                                 the scan results
+    --license-url-template TEXT  Set the template URL used for the license
+                                 reference URLs. In a template URL, curly braces
+                                 ({}) are replaced by the license key.
+                                 [default: https://enterprise.dejacode.com/urn/u
+                                 rn:dje:license:{}]
 
   output:
     --strip-root           Strip the root directory segment of all paths. The