feat(cli): add preflight

packages/cli/src/commands/init.ts

@@ -11,7 +11,7 @@ import {
   type Config,
 } from "@/src/utils/get-config"
 import { getPackageManager } from "@/src/utils/get-package-manager"
-import { getProjectConfig } from "@/src/utils/get-project-info"
+import { getProjectConfig, preFlight } from "@/src/utils/get-project-info"
 import { handleError } from "@/src/utils/handle-error"
 import { logger } from "@/src/utils/logger"
 import {
@@ -64,6 +64,8 @@ export const init = new Command()
         process.exit(1)
       }
 
+      preFlight(cwd)
+
       const projectConfig = await getProjectConfig(cwd)
       if (projectConfig) {
         const config = await promptForMinimalConfig(

packages/cli/src/utils/get-project-info.ts

@@ -175,3 +175,20 @@ export async function isTypeScriptProject(cwd: string) {
   // Check if cwd has a tsconfig.json file.
   return pathExists(path.resolve(cwd, "tsconfig.json"))
 }
+
+export async function preFlight(cwd: string) {
+  // We need Tailwind CSS to be configured.
+  const tailwindConfig = await fg.glob("tailwind.config.*", {
+    cwd,
+    deep: 3,
+    ignore: PROJECT_SHARED_IGNORE,
+  })
+
+  if (!tailwindConfig.length) {
+    throw new Error(
+      "Tailwind CSS is not installed. Visit https://tailwindcss.com/docs/installation to get started."
+    )
+  }
+
+  return true
+}