Better escape hatch for externals

Author: rdmurphy

package.json

@@ -14,8 +14,8 @@
   ],
   "scripts": {
     "build": "npm run -s build:babel && npm run -s build:self && npm run build:types",
-    "build:babel": "babel-node --extensions \".ts\" src/cli.ts \"src/{cli,index}.ts\" --target=8 --output=dist",
-    "build:self": "node dist/cli.js \"src/{cli,index}.ts\" --target=8 --output=dist",
+    "build:babel": "babel-node --extensions \".ts\" src/cli.ts \"src/{cli,index}.ts\" --target=8 --output=dist --compress",
+    "build:self": "node dist/cli.js \"src/{cli,index}.ts\" --target=8 --output=dist --compress",
     "build:types": "tsc --emitDeclarationOnly --outdir types --declaration --allowSyntheticDefaultImports src/{cli,index}.ts",
     "test": "echo \"Error: no test specified\" && exit 1"
   },

src/cli.ts

@@ -10,7 +10,7 @@ const mriConfig = {
   boolean: ['compress'],
   default: {
     compress: false,
-    output: 'lib',
+    output: 'dist',
   },
 };
 

src/index.ts

@@ -44,6 +44,8 @@ async function createRollupConfig({
 
   let banner = '';
 
+  const externalTest = new RegExp(`^(${external.join('|')})($|/)`);
+
   const inputOptions: InputOptions = {
     input,
     external: id => {
@@ -52,7 +54,8 @@ async function createRollupConfig({
         return true;
       }
 
-      return external.includes(id);
+      // otherwise do what you'd normally expect for exclusion
+      return externalTest.test(id);
     },
     plugins: [
       {
@@ -134,18 +137,20 @@ export async function bundler({
 
   const pkg = await getConfig(cwd);
 
-  const externalDependencies = Object.keys(pkg.dependencies || {});
+  const pkgDependencies = Object.keys(pkg.dependencies || {});
 
   const inputs = await glob(input, { absolute: true });
 
   for (let idx = 0; idx < inputs.length; idx++) {
     const input = inputs[idx];
 
+    const externalDependencies = pkgDependencies.concat(
+      inputs.filter(e => e !== input)
+    );
+
     const { inputOptions, outputOptions } = await createRollupConfig({
       compress,
-      externalDependencies: externalDependencies.concat(
-        inputs.filter(e => e !== input)
-      ),
+      externalDependencies,
       input,
       nodeTarget,
       outputDir,