coderabbit fixes

Author: isshaddad

packages/build/src/extensions/core/vercelSyncEnvVars.ts

@@ -11,6 +11,12 @@ type VercelEnvVar = {
   gitBranch?: string;
 };
 
+/**
+ * @deprecated Use the [Vercel integration](https://trigger.dev/docs/vercel-integration) instead.
+ * If you are using the Vercel integration, remove this extension — using both together will cause
+ * env vars to be incorrectly populated. This extension is still supported for projects that are
+ * not using the Vercel integration.
+ */
 export function syncVercelEnvVars(options?: {
   projectId?: string;
   /**
@@ -36,7 +42,16 @@ export function syncVercelEnvVars(options?: {
       process.env.VERCEL_PREVIEW_BRANCH ??
       ctx.env.VERCEL_PREVIEW_BRANCH ??
       ctx.branch;
-    const isVercelEnv = !!(ctx.env.VERCEL);
+    const isVercelEnv = !!ctx.env.VERCEL;
+
+    if (isVercelEnv) {
+      console.warn(
+        "[trigger.dev] syncVercelEnvVars: It looks like you are running inside a Vercel build environment. " +
+          "If you have the Trigger.dev Vercel integration enabled, you should remove syncVercelEnvVars from your " +
+          "trigger.config.ts — using both together can cause env vars to be incorrectly populated. " +
+          "See https://trigger.dev/docs/vercel-integration for more information."
+      );
+    }
 
     if (!projectId) {
       throw new Error(
@@ -89,13 +104,13 @@ export function syncVercelEnvVars(options?: {
           if (!env.target.includes(vercelEnvironment)) return false;
           if (isBranchable && env.gitBranch && env.gitBranch !== branch) return false;
           // When running in Vercel, prefer process.env but fall back to API value
-          const value = isVercelEnv ? (process.env[env.key] ?? env.value) : env.value;
+          const value = isVercelEnv ? process.env[env.key] ?? env.value : env.value;
           if (!value) return false;
           return true;
         })
         .map((env: VercelEnvVar) => {
           // When running in Vercel, prefer process.env but fall back to API value
-          const value = isVercelEnv ? (process.env[env.key] ?? env.value) : env.value;
+          const value = isVercelEnv ? process.env[env.key] ?? env.value : env.value;
           return {
             name: env.key,
             value,