Parse args for build_swift_format in format.py

Author: MaxDesiatov

Utilities/format.py

@@ -23,10 +23,16 @@ def build_swift_format():
     run([
       "swift", "build", "-c", "release",
       "--package-path", package_path])
-    return bin_path
+    return [bin_path]
 
 
 def main():
+    parser = argparse.ArgumentParser(
+                    prog='WasmKit codebase formatter',
+                    description='Ensures that codebase formatting is consistent')
+    parser.add_argument('-b', '--build-swift-format', action='store_true')
+    args = parser.parse_args()
+  
     targets = []
     for targets_dir in ["Sources", "Tests"]:
         targets_path = os.path.join(SOURCE_ROOT, targets_dir)
@@ -40,10 +46,13 @@ def main():
     #       swift-format.
     targets.remove(os.path.join("Sources", "SystemExtras"))
 
-    # swift_format = build_swift_format()
+    if args.build_swift_format:
+      swift_format = build_swift_format()
+    else:
+      swift_format = ["swift", "format"]
 
-    arguments = [
-        "swift", "format", "format", "--in-place", "--recursive", "--parallel"
+    arguments = swift_format + [
+        "format", "--in-place", "--recursive", "--parallel"
     ]
     for target in targets:
         arguments.append(os.path.join(SOURCE_ROOT, target))