From ab52a8c08221cda9d82ade63107f292b100f76ac Mon Sep 17 00:00:00 2001
From: Adam Wathan <adam.wathan@gmail.com>
Date: Fri, 1 May 2020 08:25:45 -0400
Subject: [PATCH] Support `purge: false`, add more info to console warning

---
 __tests__/purgeUnusedStyles.test.js | 24 ++++++++++++++++++++++++
 src/cli/emoji.js                    |  1 +
 src/lib/purgeUnusedStyles.js        |  9 +++++++--
 3 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/__tests__/purgeUnusedStyles.test.js b/__tests__/purgeUnusedStyles.test.js
index 493e5fd8a..118f21725 100644
--- a/__tests__/purgeUnusedStyles.test.js
+++ b/__tests__/purgeUnusedStyles.test.js
@@ -173,6 +173,30 @@ test('does not purge if explicitly disabled', () => {
     })
 })
 
+test('does not purge if purge is simply false', () => {
+  const OLD_NODE_ENV = process.env.NODE_ENV
+  process.env.NODE_ENV = 'production'
+  const inputPath = path.resolve(`${__dirname}/fixtures/tailwind-input.css`)
+  const input = fs.readFileSync(inputPath, 'utf8')
+
+  return postcss([
+    tailwind({
+      ...defaultConfig,
+      purge: false,
+    }),
+  ])
+    .process(input, { from: inputPath })
+    .then(result => {
+      process.env.NODE_ENV = OLD_NODE_ENV
+      const expected = fs.readFileSync(
+        path.resolve(`${__dirname}/fixtures/tailwind-output.css`),
+        'utf8'
+      )
+
+      expect(result.css).toBe(expected)
+    })
+})
+
 test('purges outside of production if explicitly enabled', () => {
   const OLD_NODE_ENV = process.env.NODE_ENV
   process.env.NODE_ENV = 'development'
diff --git a/src/cli/emoji.js b/src/cli/emoji.js
index 586557066..e5548b715 100644
--- a/src/cli/emoji.js
+++ b/src/cli/emoji.js
@@ -5,3 +5,4 @@ export const no = get('no_entry_sign')
 export const go = get('rocket')
 export const pack = get('package')
 export const disk = get('floppy_disk')
+export const warning = get('warning')
diff --git a/src/lib/purgeUnusedStyles.js b/src/lib/purgeUnusedStyles.js
index 18683f87f..394b53ba8 100644
--- a/src/lib/purgeUnusedStyles.js
+++ b/src/lib/purgeUnusedStyles.js
@@ -1,6 +1,9 @@
 import _ from 'lodash'
 import postcss from 'postcss'
 import purgecss from '@fullhuman/postcss-purgecss'
+import chalk from 'chalk'
+import { log } from '../cli/utils'
+import * as emoji from '../cli/emoji'
 
 function removeTailwindComments(css) {
   css.walkComments(comment => {
@@ -23,7 +26,7 @@ export default function purgeUnusedUtilities(config) {
   const purgeEnabled = _.get(
     config,
     'purge.enabled',
-    config.purge !== undefined && process.env.NODE_ENV === 'production'
+    config.purge !== false && config.purge !== undefined && process.env.NODE_ENV === 'production'
   )
 
   if (!purgeEnabled) {
@@ -32,7 +35,9 @@ export default function purgeUnusedUtilities(config) {
 
   // Skip if `purge: []` since that's part of the default config
   if (Array.isArray(config.purge) && config.purge.length === 0) {
-    console.log('Skipping purge because no template paths provided...')
+    log()
+    log(emoji.warning, chalk.yellow(' Skipping purge because no template paths provided.'))
+    log(chalk.white('   To silence this warning, set `purge: false` in your Tailwind config file.'))
     return removeTailwindComments
   }