Add Babel setup

Author: ehmicky

.babelrc

@@ -0,0 +1,12 @@
+{
+  "presets": [
+    [
+      "@babel/preset-env",
+      {
+        "targets": { "node": "6.0.0" },
+        "useBuiltIns": "usage"
+      }
+    ]
+  ],
+  "plugins": ["@babel/plugin-transform-runtime"]
+}

.gitignore

@@ -9,3 +9,4 @@ core
 .yarn-error.log
 .nyc_output
 coverage
+dist

custom.js

@@ -1,4 +1,5 @@
 'use strict'
 
 // See `index.js` for an alternative to this file
-module.exports = require('./src')
+// eslint-disable-next-line import/no-internal-modules
+module.exports = require('./dist/src')

gulp/files.json

@@ -10,5 +10,6 @@
     "examples/*.js",
     "examples/**/*.js"
   ],
+  "TRANSPILED": ["src", "test"],
   "MARKDOWN": ["*.md"]
 }

gulp/tasks/build.js

@@ -0,0 +1,31 @@
+'use strict'
+
+const { series } = require('gulp')
+
+const { getWatchTask } = require('../utils')
+const { TRANSPILED } = require('../files')
+const gulpExeca = require('../exec')
+
+const babel = function() {
+  const promises = TRANSPILED.map(dir =>
+    gulpExeca(
+      `babel ${dir} --out-dir dist/${dir} --copy-files --delete-dir-on-start --source-maps --no-comments --minified --retain-lines`,
+    ),
+  )
+  return Promise.all(promises)
+}
+
+const build = series(babel)
+
+// eslint-disable-next-line fp/no-mutation
+build.description = 'Build source files'
+
+const buildwatch = getWatchTask({ TRANSPILED: build }, build)
+
+// eslint-disable-next-line fp/no-mutation
+buildwatch.description = 'Build source files in watch mode'
+
+module.exports = {
+  build,
+  buildwatch,
+}

gulp/tasks/index.js

@@ -5,5 +5,6 @@ module.exports = {
   ...require('./test'),
   ...require('./check'),
   ...require('./unit'),
+  ...require('./build'),
   ...require('./emit'),
 }

gulp/tasks/main.js

@@ -3,11 +3,12 @@
 const { parallel } = require('gulp')
 
 const { testwatch } = require('./test')
+const { buildwatch } = require('./build')
 
-const dev = parallel(testwatch)
+const dev = parallel(testwatch, buildwatch)
 
 // eslint-disable-next-line fp/no-mutation
-dev.description = 'Lint and test source files'
+dev.description = 'Lint, test and build source files'
 
 module.exports = {
   dev,

index.js

@@ -1,6 +1,7 @@
 'use strict'
 
-const setup = require('./src')
+// eslint-disable-next-line import/no-internal-modules
+const setup = require('./dist/src')
 
 // Logging setup is automatically performed by `node -r log-process-errors` or
 // `require('log-process-errors')`.