From cb2624bdb9f15defc0b9231b748ab9fe7a2159de Mon Sep 17 00:00:00 2001
From: Colin Rotherham <work@colinr.com>
Date: Mon, 26 Jun 2023 11:12:31 +0100
Subject: [PATCH] Revert "Revert "Migrate task arguments helper to CommonJS""

This reverts commit d44da27de9118657efd5f5aac8470f2eab47fc25.
---
 packages/govuk-frontend/postcss.config.mjs             |  2 +-
 .../helpers/{task-arguments.mjs => task-arguments.js}  |  4 ++--
 ...ments.unit.test.mjs => task-arguments.unit.test.js} | 10 +++++-----
 shared/tasks/npm.mjs                                   |  2 +-
 4 files changed, 9 insertions(+), 9 deletions(-)
 rename shared/tasks/helpers/{task-arguments.mjs => task-arguments.js} (55%)
 rename shared/tasks/helpers/{task-arguments.unit.test.mjs => task-arguments.unit.test.js} (80%)

diff --git a/packages/govuk-frontend/postcss.config.mjs b/packages/govuk-frontend/postcss.config.mjs
index f725e8b4a8..d4e3ee2f8a 100644
--- a/packages/govuk-frontend/postcss.config.mjs
+++ b/packages/govuk-frontend/postcss.config.mjs
@@ -2,7 +2,7 @@ import autoprefixer from 'autoprefixer'
 import cssnano from 'cssnano'
 import cssnanoPresetDefault from 'cssnano-preset-default'
 import { pkg } from 'govuk-frontend-config'
-import { isDev } from 'govuk-frontend-tasks/helpers/task-arguments.mjs'
+import { isDev } from 'govuk-frontend-tasks/helpers/task-arguments.js'
 import postcss from 'postcss'
 import scss from 'postcss-scss'
 
diff --git a/shared/tasks/helpers/task-arguments.mjs b/shared/tasks/helpers/task-arguments.js
similarity index 55%
rename from shared/tasks/helpers/task-arguments.mjs
rename to shared/tasks/helpers/task-arguments.js
index 420537dd8e..75333012ff 100644
--- a/shared/tasks/helpers/task-arguments.mjs
+++ b/shared/tasks/helpers/task-arguments.js
@@ -1,7 +1,7 @@
-import parser from 'yargs-parser'
+const parser = require('yargs-parser')
 
 // Non-flag arguments as tasks
 const { _: tasks } = parser(process.argv)
 
 // Check for development task
-export const isDev = tasks.includes('dev')
+module.exports.isDev = tasks.includes('dev')
diff --git a/shared/tasks/helpers/task-arguments.unit.test.mjs b/shared/tasks/helpers/task-arguments.unit.test.js
similarity index 80%
rename from shared/tasks/helpers/task-arguments.unit.test.mjs
rename to shared/tasks/helpers/task-arguments.unit.test.js
index 17e57e2b61..043e4a66a6 100644
--- a/shared/tasks/helpers/task-arguments.unit.test.mjs
+++ b/shared/tasks/helpers/task-arguments.unit.test.js
@@ -26,35 +26,35 @@ describe('Task arguments', () => {
       it('is flagged false', async () => {
         process.argv = [...argv]
 
-        const { isDev } = await import('./task-arguments.mjs')
+        const { isDev } = require('./task-arguments.js')
         expect(isDev).toBe(false)
       })
 
       it("is flagged false for 'gulp build:app'", async () => {
         process.argv = [...argv, 'build:app']
 
-        const { isDev } = await import('./task-arguments.mjs')
+        const { isDev } = require('./task-arguments.js')
         expect(isDev).toBe(false)
       })
 
       it("is flagged false for 'gulp build:package'", async () => {
         process.argv = [...argv, 'build:package']
 
-        const { isDev } = await import('./task-arguments.mjs')
+        const { isDev } = require('./task-arguments.js')
         expect(isDev).toBe(false)
       })
 
       it("is flagged false for 'gulp build:release'", async () => {
         process.argv = [...argv, 'build:release']
 
-        const { isDev } = await import('./task-arguments.mjs')
+        const { isDev } = require('./task-arguments.js')
         expect(isDev).toBe(false)
       })
 
       it("is flagged true for 'gulp dev'", async () => {
         process.argv = [...argv, 'dev']
 
-        const { isDev } = await import('./task-arguments.mjs')
+        const { isDev } = require('./task-arguments.js')
         expect(isDev).toBe(true)
       })
     })
diff --git a/shared/tasks/npm.mjs b/shared/tasks/npm.mjs
index 5bec8c9b94..90d1c39d63 100644
--- a/shared/tasks/npm.mjs
+++ b/shared/tasks/npm.mjs
@@ -2,7 +2,7 @@ import runScript from '@npmcli/run-script'
 import { paths } from 'govuk-frontend-config'
 import PluginError from 'plugin-error'
 
-import { isDev } from './helpers/task-arguments.mjs'
+import { isDev } from './helpers/task-arguments.js'
 import { task } from './index.mjs'
 
 /**