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Scope chunk + asset naming by [dir] to avoid collisions on older Bun

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The Bun shipped with Cloudflare Pages doesn't dedupe shared CSS chunks
across HTML entrypoints — each entry tries to emit its own copy. With
chunk: '[name]-[hash].[ext]', three sub-pages all named index.html
(skills/, tutorials/, anti-patterns/) plus shared CSS content end up
producing chunks with identical name+hash and the build aborts on
'Multiple files share the same output path'.

Including [dir] in the chunk and asset templates scopes each chunk to
its entry's source directory, so the per-entry copies land in unique
paths even when dedupe is off. Local Bun (1.3.x) still emits a single
shared chunk because [dir] is only used when there are multiple chunk
candidates.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Paul Bakaus
2026-04-08 14:21:11 -07:00
co-authored by Claude Opus 4.6
parent 2396bc16d6
commit b30b1ab1a3
1 changed files with 10 additions and 7 deletions
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scripts/build.js
+10 -7
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@@ -298,15 +298,18 @@ async function buildStaticSite(extraEntrypoints = []) {
outdir: outdir,
minify: true,
sourcemap: 'linked',
// Older Bun versions (e.g. the one Cloudflare Pages ships) emit shared
// CSS/JS chunks without a content hash in the filename, which collides
// when multiple HTML entries import the same CSS partial. Force the
// chunk + asset naming to always include [hash] so the build is
// reproducible across Bun versions.
// Older Bun versions (e.g. the one Cloudflare Pages ships) don't dedupe
// shared CSS/JS chunks across HTML entrypoints — every entry tries to
// emit its own copy, and three different sub-pages all named index.html
// (under skills/, tutorials/, anti-patterns/) collide on the same
// chunk filename. Including [dir] in the chunk template scopes each
// chunk to its entry's directory so the names stay unique even when
// dedupe is off. Local Bun still emits a single shared chunk; CF Bun
// emits one per entry but each lands in its own directory.
naming: {
entry: '[dir]/[name].[ext]',
chunk: '[name]-[hash].[ext]',
asset: '[name]-[hash].[ext]',
chunk: '[dir]/[name]-[hash].[ext]',
asset: '[dir]/[name]-[hash].[ext]',
},
});