Specific suggestion what to run if formatting check fails (#2220)

This change suggests running specific command 'npm run prettier:fix' to
fix prettier errors if the formatting check fails. Could be hard to
figure out what to run by just looking at 'Run Prettier with --write to
fix' message.

Co-authored-by: Dmitry Vasilevsky <[email protected]>

Author: DmitryVasilevsky

build.py

@@ -174,7 +174,11 @@ def use_python_env(folder):
 
 if args.check:
     step_start("Running eslint and prettier checks")
-    subprocess.run([npm_cmd, "run", "check"], check=True, text=True, cwd=root_dir)
+    try:
+        subprocess.run([npm_cmd, "run", "check"], check=True, text=True, cwd=root_dir)
+    except subprocess.CalledProcessError:
+        print("Consider running 'npm run prettier:fix' to fix prettier errors.")
+        raise
 
     if build_wasm or build_cli:
         # If we're going to check the Rust code, do this before we try to compile it