Build: Implement an asciilint task to verify content of ui files (ignore i18n). Fixes #9037 - Build: Verify characters in output

1 files changed, 33 insertions, 0 deletions

diff --git a/build/tasks/build.js b/build/tasks/build.js
index 4d803df77..c50745899 100644
--- a/build/tasks/build.js
+++ b/build/tasks/build.js
@@ -135,4 +135,37 @@ grunt.registerTask( "clean", function() {
 	require( "rimraf" ).sync( "dist" );
 });
 
+grunt.registerTask( "asciilint", function() {
+	var valid = true,
+		files = grunt.file.expand({ filter: "isFile" }, "ui/*.js" );
+	files.forEach(function( filename ) {
+		var i, c,
+			text = grunt.file.read( filename );
+
+		// Ensure files use only \n for line endings, not \r\n
+		if ( /\x0d\x0a/.test( text ) ) {
+			grunt.log.error( filename + ": Incorrect line endings (\\r\\n)" );
+			valid = false;
+		}
+
+		// Ensure only ASCII chars so script tags don't need a charset attribute
+		if ( text.length !== Buffer.byteLength( text, "utf8" ) ) {
+			grunt.log.error( filename + ": Non-ASCII characters detected:" );
+			for ( i = 0; i < text.length; i++ ) {
+				c = text.charCodeAt( i );
+				if ( c > 127 ) {
+					grunt.log.error( "- position " + i + ": " + c );
+					grunt.log.error( "-- " + text.substring( i - 20, i + 20 ) );
+					break;
+				}
+			}
+			valid = false;
+		}
+	});
+	if ( valid ) {
+		grunt.log.ok( files.length + " files lint free." );
+	}
+	return valid;
+});
+
 };