Fix opts.colors: true

Author: ehmicky

src/colors.js

@@ -1,15 +1,30 @@
 'use strict'
 
 const chalk = require('chalk')
+const { stdout: { level } = {} } = require('supports-color')
 
-const getColors = function({ opts: { colors } }) {
-  // Can disable or force colors with `opts.colors`.
-  // chalk will automatically disable colors if output does not support it.
-  const chalkOpts = { enabled: Boolean(colors) }
-
+const getColors = function({ opts }) {
+  const chalkOpts = getChalkOpts({ opts })
   return chalk.constructor(chalkOpts)
 }
 
+// Can disable or force colors with `opts.colors`.
+// chalk will automatically disable colors if output does not support it.
+const getChalkOpts = function({ opts: { colors } }) {
+  if (colors === undefined) {
+    return {}
+  }
+
+  if (colors === false) {
+    return { enabled: false }
+  }
+
+  // Chalk `level` must be set otherwise `enabled` will be noop if terminal
+  // does not support color (e.g. during a shell file redirection)
+  // However it should only be set if it is `undefined` or `0`
+  return { enabled: true, level: level || 2 }
+}
+
 module.exports = {
   getColors,
 }