Add help info

Author: TartanLlama

src/parseInputs.ts

@@ -137,6 +137,19 @@ export async function parseInputs(cliInputs: string[]): Promise<ParsedInputs> {
         }
         break;
       }
+      case '--weval-bin': {
+        const value = cliInputs.shift();
+        if (value == null) {
+          console.error('Error: --weval-bin requires a value');
+          process.exit(1);
+        }
+        if (isAbsolute(value)) {
+          wevalBin = value;
+        } else {
+          wevalBin = join(process.cwd(), value);
+        }
+        break;
+      }
       case '--aot-cache': {
         const value = cliInputs.shift();
         if (value == null) {
@@ -225,6 +238,12 @@ export async function parseInputs(cliInputs: string[]): Promise<ParsedInputs> {
     wasmEngine = join(__dirname, '../fastly-weval.wasm');
   }
 
+  if (wevalBin && !enableAOT) {
+    console.error(
+      'Warning: --weval-bin has no effect without --enable-aot, as weval is only used for AOT compilation',
+    );
+  }
+
   return {
     enableExperimentalHighResolutionTimeMethods,
     enableHttpCache,

src/printHelp.ts

@@ -29,7 +29,8 @@ OPTIONS:
     --enable-experimental-top-level-await                   Enable experimental top level await
     --enable-stack-traces                                   Enable stack traces
     --exclude-sources                                       Don't include sources in stack traces                
-    --debug-intermediate-files <dir>                        Output intermediate files in directory                
+    --debug-intermediate-files <dir>                        Output intermediate files in directory   
+    --weval-bin <weval-bin>                                 Path to the weval binary to use for AOT compilation             
 
 ARGS:
     <input>     The input JS script's file path [default: bin/index.js]