refactor: Deprecate Rollup strategy.

package.json

@@ -27,18 +27,14 @@
     "@darkobits/log": "^2.0.0-beta.15",
     "@darkobits/valida": "^0.1.6",
     "@esbuild-plugins/tsconfig-paths": "^0.1.2",
-    "@rollup/plugin-typescript": "^11.1.2",
     "@types/yargs": "^17.0.24",
     "camelcase-keys": "^8.0.2",
     "cosmiconfig": "^8.2.0",
     "deepmerge": "^4.3.1",
     "esbuild": "^0.18.11",
     "esbuild-node-externals": "^1.8.0",
     "fs-extra": "^11.1.1",
-    "node-version": "^3.0.0",
     "read-pkg-up": "^10.0.0",
-    "rollup": "^3.26.2",
-    "rollup-plugin-node-externals": "^6.1.1",
     "tsconfck": "^2.1.1",
     "yargs": "^17.7.2"
   },

src/lib/configuration/loader.ts

@@ -5,7 +5,6 @@ import merge from 'deepmerge';
 
 import validators from 'etc/validators';
 import { esbuildStrategy } from 'lib/configuration/strategies/esbuild';
-import { rollupStrategy } from 'lib/configuration/strategies/rollup';
 import log from 'lib/log';
 import { getPackageInfo } from 'lib/package';
 
@@ -77,13 +76,7 @@ async function ecmaScriptLoader(filePath: string /* , contents: string */) {
   /**
    * Strategy 2: esbuild
    *
-   * This strategy will work for files that:
-   * - import nothing
-   * - only import other code that does not require a transpilation step
-   * - do not use any custom path mappings
-   *
-   * It is faster than Rollup and should cover the vast majority of cases where
-   * a simple dynamic import will not work.
+   * Uses esbuild to transpile the indicated file.
    */
   try {
     const result = await esbuildStrategy(filePath, pkgInfo);
@@ -94,22 +87,6 @@ async function ecmaScriptLoader(filePath: string /* , contents: string */) {
   }
 
 
-  /**
-   * Strategy 3: Rollup
-   *
-   * This is the slowest strategy, but the most robust. It will inline and
-   * transpile any code that the configuration file imports, allowing the
-   * output file to be imported as a standalone bundle.
-   */
-  try {
-    const result = await rollupStrategy(filePath, pkgInfo);
-    log.verbose(prefix, 'Used strategy:', log.chalk.bold('rollup'));
-    return getDefaultExport(result);
-  } catch (err: any) {
-    errors.push(new Error(`${prefix} Failed to load file with ${log.chalk.bold('rollup')}: ${err}`));
-  }
-
-
   if (errors.length > 0) throw new AggregateError(errors, 'All parsing strategies failed.');
 }
 

src/lib/configuration/strategies/esbuild.ts

@@ -4,7 +4,6 @@ import { TsconfigPathsPlugin } from '@esbuild-plugins/tsconfig-paths';
 import * as esbuild from 'esbuild';
 import { nodeExternalsPlugin } from 'esbuild-node-externals';
 import fs from 'fs-extra';
-import currentNodeVersion from 'node-version';
 import * as tsConfck from 'tsconfck';
 
 import log from 'lib/log';
@@ -70,7 +69,7 @@ export async function esbuildStrategy<M = any>(filePath: string, pkgInfo: Packag
   try {
     const buildOptions: esbuild.BuildOptions = {
       entryPoints: [filePath],
-      target: `node${currentNodeVersion.major}`,
+      target: 'node16',
       outfile: tempFilePath,
       format,
       platform: 'node',