fix: skip esbuild bundling during toJSON() article discovery

The esbuild plugin's eleventy.before hook runs during toJSON() calls,
but bundling is unnecessary for article discovery and requires env vars
that aren't available in every CI step. Skip bundling when outputMode
is "json".

Author: limulus

11ty/esbuild.ts

@@ -9,9 +9,13 @@ export default async function (eleventyConfig: UserConfig): Promise<void> {
 
   let hashes: Record<string, string> | undefined
 
-  eleventyConfig.on('eleventy.before', async function () {
-    hashes = await bundle(await globby(['www/**/index.ts', 'www/**/worker.ts']))
-  })
+  eleventyConfig.on(
+    'eleventy.before',
+    async function ({ outputMode }: { outputMode: string }) {
+      if (outputMode === 'json') return
+      hashes = await bundle(await globby(['www/**/index.ts', 'www/**/worker.ts']))
+    }
+  )
 
   eleventyConfig.addTransform('esbuild-translate-hashes', function (content) {
     return translateHashes(this.page.inputPath, this.page.url, hashes, content) ?? content

types/eleventy.d.ts

@@ -33,7 +33,7 @@ declare module '@11ty/eleventy' {
 
   interface UserConfig {
     addWatchTarget(path: string): void
-    on(event: string, callback: () => void | Promise<void>): void
+    on(event: string, callback: (...args: any[]) => void | Promise<void>): void
     addTransform(
       name: string,
       callback: (