make jsConfigMigration nullable

Author: RobinMalfait

packages/@tailwindcss-upgrade/src/codemods/css/migrate-config.ts

@@ -11,7 +11,7 @@ export function migrateConfig(
   {
     configFilePath,
     jsConfigMigration,
-  }: { configFilePath: string; jsConfigMigration: JSConfigMigration },
+  }: { configFilePath: string; jsConfigMigration: JSConfigMigration | null },
 ): Plugin {
   function migrate() {
     if (!sheet.isTailwindRoot) return

packages/@tailwindcss-upgrade/src/codemods/css/migrate.ts

@@ -19,7 +19,7 @@ export interface MigrateOptions {
   designSystem: DesignSystem
   userConfig: Config
   configFilePath: string
-  jsConfigMigration: JSConfigMigration
+  jsConfigMigration: JSConfigMigration | null
 }
 
 export async function migrate(stylesheet: Stylesheet, options: MigrateOptions) {

packages/@tailwindcss-upgrade/src/index.ts

@@ -123,6 +123,7 @@ async function run() {
     >()
     for (let sheet of stylesheets) {
       if (!sheet.isTailwindRoot) continue
+      if (!sheet.linkedConfigPath) continue
 
       let config = await prepareConfig(sheet.linkedConfigPath, { base })
       configBySheet.set(sheet, config)
@@ -147,7 +148,7 @@ async function run() {
       }
     }
 
-    // Migrate source files, linked to config files
+    // Migrate source files
     if (configBySheet.size > 0) {
       info('Migrating templates…')
     }
@@ -190,19 +191,22 @@ async function run() {
       stylesheets.map(async (sheet) => {
         try {
           let config = configBySheet.get(sheet)!
-          let jsConfigMigration = jsConfigMigrationBySheet.get(sheet)!
+          let jsConfigMigration = jsConfigMigrationBySheet.get(sheet)
 
           if (!config) {
             for (let parent of sheet.ancestors()) {
               if (parent.isTailwindRoot) {
                 config ??= configBySheet.get(parent)!
-                jsConfigMigration ??= jsConfigMigrationBySheet.get(parent)!
+                jsConfigMigration ??= jsConfigMigrationBySheet.get(parent)
                 break
               }
             }
           }
 
-          await migrateStylesheet(sheet, { ...config, jsConfigMigration })
+          await migrateStylesheet(sheet, {
+            ...config,
+            jsConfigMigration: jsConfigMigration ?? null,
+          })
         } catch (e: any) {
           error(`${e?.message ?? e} in ${highlight(relative(sheet.file!, base))}`, { prefix: '↳ ' })
         }