Merge pull request #2415 from cbzehner/ignore-extra-fields-on-arg

Ignore extra fields in Arg yaml definitions

src/build/arg/mod.rs

@@ -4712,10 +4712,7 @@ impl<'help> From<&'help Yaml> for Arg<'help> {
                         panic!("Failed to convert YAML value to vector")
                     }
                 }
-                s => panic!(
-                    "Unknown Arg setting '{}' in YAML file for arg '{}'",
-                    s, name_str
-                ),
+                _ => continue, // Ignore extra fields
             }
         }
 

tests/fixtures/app.yaml

@@ -4,11 +4,13 @@ about: tests clap library
 author: Kevin K. <kbknapp@gmail.com>
 settings:
     - ArgRequiredElseHelp
+ignored_field: This field is ignored
 args:
     - help:
         short: h
         long: help
         about: prints help with a nonstandard description
+        ignored_field: This field is ignored
     - option:
         short: o
         long: option