feat: add sveltekit support

[adriandlam]

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Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	npm/​@​sveltejs/​adapter-auto@​7.0.0
	npm/​@​sveltejs/​adapter-vercel@​6.1.1
	npm/​@​sveltejs/​adapter-node@​5.4.0
	npm/​@​sveltejs/​kit@​2.48.2
	npm/​@​sveltejs/​vite-plugin-svelte@​6.2.1
	npm/​svelte@​5.43.0
	npm/​vite-plugin-devtools-json@​1.0.0
	npm/​svelte-check@​4.3.3

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Additional Comments:

packages/cli/src/lib/config/types.ts (lines 42-46):
The isValidBuildTarget function doesn't include the new 'sveltekit' build target in its validation logic, so users trying to build with --target sveltekit will have their target silently changed to 'standalone'.

View Details

📝 Patch Details

diff --git a/packages/cli/src/commands/build.ts b/packages/cli/src/commands/build.ts
index c9ddaf5..bb23067 100644
--- a/packages/cli/src/commands/build.ts
+++ b/packages/cli/src/commands/build.ts
@@ -1,8 +1,9 @@
 import { Args, Flags } from '@oclif/core';
 import { BaseCommand } from '../base.js';
+import { NextBuilder } from '../lib/builders/next-build.js';
 import { VercelBuildOutputAPIBuilder } from '../lib/builders/vercel-build-output-api.js';
 import { StandaloneBuilder } from '../lib/builders/standalone.js';
-import { type BuildTarget, isValidBuildTarget } from '../lib/config/types.js';
+import { type BuildTarget, isValidBuildTarget, validBuildTargets } from '../lib/config/types.js';
 import { getWorkflowConfig } from '../lib/config/workflow-config.js';
 
 export default class Build extends BaseCommand {
@@ -18,7 +19,7 @@ export default class Build extends BaseCommand {
     target: Flags.string({
       char: 't',
       description: 'build target',
-      options: ['standalone', 'vercel-build-output-api'],
+      options: validBuildTargets,
       default: 'standalone',
     }),
     'workflow-manifest': Flags.string({
@@ -61,7 +62,7 @@ export default class Build extends BaseCommand {
       this.logWarn(
         `Invalid target "${buildTarget}". Using default "standalone".`
       );
-      this.logWarn('Valid targets: standalone, vercel-build-output-api');
+      this.logWarn(`Valid targets: ${validBuildTargets.join(', ')}`);
       buildTarget = 'standalone';
     }
 
@@ -82,6 +83,14 @@ export default class Build extends BaseCommand {
         this.logInfo('Building with VercelBuildOutputAPIBuilder');
         const builder = new VercelBuildOutputAPIBuilder(config);
         await builder.build();
+      } else if (config.buildTarget === 'next') {
+        this.logInfo('Building with NextBuilder');
+        const builder = new NextBuilder(config);
+        await builder.build();
+      } else if (config.buildTarget === 'sveltekit') {
+        this.logInfo('Building with StandaloneBuilder (SvelteKit support)');
+        const builder = new StandaloneBuilder(config);
+        await builder.build();
       } else {
         this.error(`Unknown build target: ${config.buildTarget}`);
       }
diff --git a/packages/cli/src/lib/config/types.ts b/packages/cli/src/lib/config/types.ts
index b4d729c..a278673 100644
--- a/packages/cli/src/lib/config/types.ts
+++ b/packages/cli/src/lib/config/types.ts
@@ -42,5 +42,5 @@ export interface WorkflowConfig {
 export function isValidBuildTarget(
   target: string | undefined
 ): target is BuildTarget {
-  return target === 'standalone' || target === 'vercel-build-output-api';
+  return validBuildTargets.includes(target as any);
 }

Analysis

isValidBuildTarget doesn't validate 'next' and 'sveltekit' targets

What fails: The isValidBuildTarget() function in packages/cli/src/lib/config/types.ts only validates 'standalone' and 'vercel-build-output-api', missing the 'next' and 'sveltekit' targets that are defined in the validBuildTargets array.

How to reproduce:

cd packages/cli
npm run build -- --target next

Result: Returns validation error "Invalid target 'next'. Using default 'standalone'." and silently falls back to building standalone instead of next.

Expected: The validation should pass since 'next' is a valid target in the validBuildTargets array, and the build should proceed with the NextBuilder.

Root causes:

1. isValidBuildTarget() used hardcoded string checks instead of checking against validBuildTargets array
2. build.ts CLI flags options array was not updated to include 'next' and 'sveltekit'
3. build.ts lacked handler branches for 'next' and 'sveltekit' build targets
4. NextBuilder was not imported despite being needed for the 'next' target

Fixes applied:

• Updated isValidBuildTarget() to check: return validBuildTargets.includes(target as any);
• Updated build.ts to import validBuildTargets and NextBuilder
• Updated CLI flags options to use validBuildTargets array dynamically
• Updated validation error message to dynamically list all valid targets
• Added handler branches for 'next' target (uses NextBuilder) and 'sveltekit' target (uses StandaloneBuilder which has built-in SvelteKit support via BaseBuilder)