Require Node.js 14.18+ (#760)

Closes #738.

.changeset/big-actors-heal.md

@@ -0,0 +1,13 @@
+---
+"skuba": major
+---
+
+deps: Require Node.js 14.18+
+
+Node.js 12 will reach end of life by April 2022. The `semantic-release` package and stable `--enable-source-maps` flag necessitate this new minimum version.
+
+Consider upgrading the Node.js version for your project across:
+
+- `.nvmrc`
+- `package.json#/engines/node`
+- CI/CD configuration (`.buildkite/pipeline.yml`, `Dockerfile`, etc.)

jest/moduleNameMapper.js

@@ -11,7 +11,7 @@ const {
 /**
  * Set a default `src` module alias for backward compatibility.
  *
- * TODO: drop this default in skuba v4.
+ * TODO: drop this default in skuba v5.
  */
 const DEFAULT_PATHS = { src: ['src'], 'src/*': ['src/*'] };
 
@@ -20,8 +20,7 @@ const DEFAULT_PATHS = { src: ['src'], 'src/*': ['src/*'] };
  */
 const getConfigFromDisk = () => {
   const filename =
-    // TODO: drop Node.js 12 compatibility and switch to ?? in skuba v4.
-    findConfigFile('.', sys.fileExists.bind(this)) || 'tsconfig.json';
+    findConfigFile('.', sys.fileExists.bind(this)) ?? 'tsconfig.json';
 
   return readConfigFile(filename, sys.readFile.bind(this)).config;
 };
@@ -33,8 +32,7 @@ module.exports.createModuleNameMapper = (getConfig = getConfigFromDisk) => {
     const parsedConfig = parseJsonConfigFileContent(json, sys, '.');
 
     const paths = Object.fromEntries(
-      // TODO: drop Node.js 12 compatibility and switch to ?? in skuba v4.
-      Object.entries(parsedConfig.options.paths || DEFAULT_PATHS).flatMap(
+      Object.entries(parsedConfig.options.paths ?? DEFAULT_PATHS).flatMap(
         ([key, values]) => [
           // Pass through the input path entry almost verbatim.
           // We trim a trailing slash because TypeScript allows `import 'src'`
@@ -66,8 +64,7 @@ module.exports.createModuleNameMapper = (getConfig = getConfigFromDisk) => {
       ),
     );
 
-    // TODO: drop Node.js 12 compatibility and switch to ?? in skuba v4.
-    const prefix = path.join('<rootDir>', parsedConfig.options.baseUrl || '.');
+    const prefix = path.join('<rootDir>', parsedConfig.options.baseUrl ?? '.');
 
     const moduleNameMapper = pathsToModuleNameMapper(paths, { prefix });
 

package.json

@@ -5,7 +5,7 @@
     "skuba": "lib/skuba.js"
   },
   "engines": {
-    "node": ">=12"
+    "node": ">=14.18"
   },
   "version": "3.17.2",
   "main": "lib/index.js",