fix: pass config object to devCommand step handler (#6095)

Author: VitaliyR

packages/build/src/steps/get.ts

@@ -28,8 +28,10 @@ export const getSteps = function (steps, eventHandlers?: any[]) {
 export const getDevSteps = function (command, steps, eventHandlers?: any[]) {
   const devCommandStep = {
     event: 'onDev',
-    coreStep: async () => {
-      await command()
+    coreStep: async (args) => {
+      const { constants, event } = args
+      const utils = getUtils({ event, constants, runState: {} })
+      await command({ utils, ...args })
 
       return {}
     },

packages/build/tests/plugins_events/fixtures/dev_and_build/plugin.js

@@ -1,5 +1,6 @@
-export const onPreDev = function ({ constants }) {
+export const onPreDev = function ({ constants, netlifyConfig }) {
   console.log('onPreDev:', constants)
+  netlifyConfig.build.environment.TEST_ASSIGN = 'true';
 }
 
 export const onDev = function ({ constants }) {

packages/build/tests/plugins_events/snapshots/tests.js.md

@@ -1518,6 +1518,7 @@ Generated by [AVA](https://avajs.dev).
       INTERNAL_EDGE_FUNCTIONS_SRC: '.netlify/edge-functions',␊
       PUBLISH_DIR: '.'␊
     }␊
+    Netlify configuration property "build.environment.TEST_ASSIGN" value changed.␊
     ␊
     (./plugin.js onPreDev completed in 1ms)␊
     ␊
@@ -1555,6 +1556,7 @@ Generated by [AVA](https://avajs.dev).
       INTERNAL_EDGE_FUNCTIONS_SRC: '.netlify/edge-functions',␊
       PUBLISH_DIR: '.'␊
     }␊
+    Netlify configuration property "build.environment.TEST_ASSIGN" value changed.␊
     onDev: {␊
       CONFIG_PATH: 'netlify.toml',␊
       FUNCTIONS_DIST: '.netlify/functions/',␊

packages/build/tests/plugins_events/snapshots/tests.js.snap

@@ -134,3 +134,17 @@ test('Shows error information in the `startDev` entrypoint even when `quiet: tru
 
   t.is(devCommand.callCount, 0)
 })
+
+test('Passes plugin options into dev command', async (t) => {
+  const devCommand = sinon.stub().resolves()
+
+  await new Fixture('./fixtures/dev_and_build')
+    .withFlags({ debug: false, quiet: true, timeline: 'dev' })
+    .runDev(devCommand)
+
+  t.is(devCommand.callCount, 1)
+  t.truthy(devCommand.lastCall.args[0])
+  t.truthy(devCommand.lastCall.args[0].netlifyConfig)
+  t.truthy(devCommand.lastCall.args[0].childEnv.TEST_ASSIGN)
+  console.log(devCommand.lastCall.args[0].childEnv)
+})