node16, better info

Author: samthor

README.md

@@ -15,7 +15,7 @@ Think of it as doing code-splitting 'last', rather than first.
 
 ## Requirements
 
-Node 14+.
+Node 16+.
 
 Kuto works best on large (>1mb) singular JS bundles 'bundled' to ESM — the tool works on a statement level, and an IIFE/webpack output is one giant statement.
 

app/cmd/info.ts

@@ -71,8 +71,18 @@ export default async function cmdInfo(args: InfoArgs) {
     console.info(`- ${g}${rw ? ' (written)' : ''}`);
   }
 
+  console.info('\nImports used at top-level:');
+  for (const g of toplevelFind.imports.keys()) {
+    console.info(`- ${g}`);
+  }
+
   console.info('\nGlobals used in callables:');
   for (const [g, rw] of nestedFind.globals) {
     console.info(`- ${g}${rw ? ' (written)' : ''}`);
   }
+
+  console.info('\nImports used in callables:');
+  for (const g of nestedFind.imports.keys()) {
+    console.info(`- ${g}`);
+  }
 }

app/index.ts

@@ -1,18 +1,17 @@
 #!/usr/bin/env node
 
 import * as cmd from './lib/cmd.ts';
-import cmdSplit from './cmd/split.ts';
-import cmdInfo from './cmd/info.ts';
 
 cmd.register('info', {
   description: 'Show information about a JS module file',
   positional: true,
   usageSuffix: '<path>',
-  handler(res) {
+  async handler(res) {
     if (res.positionals.length !== 1) {
       throw new cmd.CommandError();
     }
 
+    const { default: cmdInfo } = await import('./cmd/info.ts');
     return cmdInfo({ path: res.positionals[0] });
   },
 });
@@ -49,15 +48,16 @@ cmd.register('split', {
       default: '',
       short: 'n',
       help: 'output basename (default to basename of source)',
-    }
+    },
   },
   positional: true,
   usageSuffix: '<source> <outdir/>',
-  handler(res) {
+  async handler(res) {
     if (res.positionals.length !== 2) {
       throw new cmd.CommandError();
     }
 
+    const { default: cmdSplit } = await import('./cmd/split.ts');
     return cmdSplit({
       min: +(res.values['min'] ?? 0),
       keep: +(res.values['keep'] ?? 0),
@@ -70,8 +70,4 @@ cmd.register('split', {
   },
 });
 
-// TODO: until we rev from node14
-const p = Promise.resolve(cmd.run());
-p.catch((e) => {
-  throw e;
-});
+await cmd.run();

app/lib/cmd.ts

@@ -79,4 +79,4 @@ export const run = (argv = process.argv.slice(2)): any => {
   process.exit(v['help'] ? 0 : 1);
 };
 
-export class CommandError extends Error { }
+export class CommandError extends Error {}