feat(cpa): allow plugin selection

packages/create-payload-app/package.json

@@ -71,7 +71,8 @@
     "fs-extra": "^9.0.1",
     "globby": "11.1.0",
     "tar": "^7.4.3",
-    "terminal-link": "^2.1.1"
+    "terminal-link": "^2.1.1",
+    "ts-morph": "27.0.0"
   },
   "devDependencies": {
     "@types/esprima": "^4.0.6",

packages/create-payload-app/src/lib/add-plugins-to-config.spec.ts

@@ -0,0 +1,23 @@
+import { fileURLToPath } from 'node:url'
+import path from 'path'
+const filename = fileURLToPath(import.meta.url)
+const dirname = path.dirname(filename)
+
+import { addPluginsToConfig } from './add-plugins-to-config.js'
+import { pluginReplacements } from './ast-replacements.js'
+
+describe('populateConfigWithPlugins', () => {
+  it('should populate the config with plugins', async () => {
+    const configPath = path.resolve(dirname, '../../../../templates/blank/src/payload.config.ts')
+    const { configContent } = await addPluginsToConfig({
+      configPath,
+      plugins: ['@payloadcms/plugin-search'],
+      saveConfig: false,
+    })
+
+    const plugin = pluginReplacements['@payloadcms/plugin-search']
+
+    expect(configContent).toContain(`import { ${plugin.importName} } from '${plugin.importModule}'`)
+    expect(configContent).toMatch(/plugins:\s\[.*searchPlugin\(\).*\]/s)
+  })
+})

packages/create-payload-app/src/lib/add-plugins-to-config.ts

@@ -0,0 +1,68 @@
+import { Project, QuoteKind, SyntaxKind } from 'ts-morph'
+
+import type { PluginPackageName } from './ast-replacements.js'
+
+import { pluginReplacements } from './ast-replacements.js'
+
+export async function addPluginsToConfig({
+  configPath,
+  plugins,
+  saveConfig = true,
+}: {
+  configPath: string
+  plugins: PluginPackageName[]
+  /** Save modifications to the config. Set to false for unit testing */
+  saveConfig?: boolean
+}) {
+  const project = new Project({
+    manipulationSettings: {
+      quoteKind: QuoteKind.Single,
+    },
+  })
+
+  project.addSourceFilesAtPaths(configPath)
+  const sourceFile = project.getSourceFileOrThrow(configPath)
+
+  // Find the default export assignment
+  const exportAssignment = sourceFile.getExportAssignmentOrThrow(
+    (e) => e.isExportEquals() === false,
+  )
+
+  // Get the buildConfig call expression
+  const buildConfigCall = exportAssignment.getExpressionIfKindOrThrow(SyntaxKind.CallExpression)
+
+  // Get the first argument of buildConfig, which should be an object literal
+  const configObject = buildConfigCall
+    ?.getArguments?.()?.[0]
+    ?.asKindOrThrow(SyntaxKind.ObjectLiteralExpression)
+
+  // Find the plugins property on the config object
+  const pluginsProperty = configObject?.getPropertyOrThrow('plugins')
+
+  const pluginsArray = pluginsProperty
+    ?.asKindOrThrow(SyntaxKind.PropertyAssignment)
+    ?.getInitializerIfKindOrThrow(SyntaxKind.ArrayLiteralExpression)
+
+  const pluginsToAdd = plugins.map((name) => pluginReplacements[name]).filter(Boolean)
+
+  pluginsToAdd.forEach((plugin) => {
+    console.log(`Adding plugin: ${plugin.packageName}`)
+    pluginsArray?.addElement(plugin.pluginCode.join('\n')) // Questionable
+
+    sourceFile.addImportDeclaration({
+      moduleSpecifier: plugin.importModule,
+      namedImports: [plugin.importName],
+    })
+  })
+
+  // Save changes
+  if (saveConfig) {
+    await project.save()
+  }
+
+  console.log('Project changes saved.')
+
+  // TODO: Add plugin packages to package.json
+
+  return { configContent: sourceFile.getFullText() }
+}

packages/create-payload-app/src/lib/ast-replacements.ts

@@ -0,0 +1,21 @@
+export type PluginPackageName = '@payloadcms/plugin-search'
+export const pluginReplacements: Record<
+  PluginPackageName,
+  {
+    /** Module used in import statement */
+    importModule: string
+    /** Named import used in import statement */
+    importName: string
+    /** Package to be added to the package.json */
+    packageName: string
+    /** Code to be added to the plugins array */
+    pluginCode: string[]
+  }
+> = {
+  '@payloadcms/plugin-search': {
+    importModule: '@payloadcms/plugin-search',
+    importName: 'searchPlugin',
+    packageName: '@payloadcms/plugin-search',
+    pluginCode: ['searchPlugin()'],
+  },
+}

packages/create-payload-app/src/lib/configure-payload-config.ts

@@ -5,6 +5,7 @@ import path from 'path'
 import type { DbType, StorageAdapterType } from '../types.js'
 
 import { warning } from '../utils/log.js'
+import { addPluginsToConfig } from './add-plugins-to-config.js'
 import { dbReplacements, storageReplacements } from './replacements.js'
 
 /** Update payload config with necessary imports and adapters */
@@ -138,6 +139,12 @@ export async function configurePayloadConfig(args: {
     }
 
     fse.writeFileSync(payloadConfigPath, configLines.join('\n'))
+
+    // Hard-coded plugin for POC
+    await addPluginsToConfig({
+      configPath: payloadConfigPath,
+      plugins: ['@payloadcms/plugin-search'],
+    })
   } catch (err: unknown) {
     warning(
       `Unable to update payload.config.ts with plugins: ${err instanceof Error ? err.message : ''}`,