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fix: inject BUILD_TAG into sw.js via regex so a fallback bump cannot freeze the SW version

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Jonathan Sykes
2026-07-02 21:07:22 +08:00
parent e6f032a6f2
commit 4a18990058
1 changed files with 9 additions and 2 deletions
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11
server/server.js
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@@ -392,11 +392,18 @@ app.get('/sw.js', (c) => {
return c.text('Service worker not found', 404);
}
}
// Inject the build tag: replace the placeholder with the real value.
// Inject the build tag: replace the whole fallback expression with the
// real value. Matched by REGEX, not an exact string — an exact match broke
// the moment the fallback literal in sw.js was bumped ('v1.0.3' → 'v1.0.4'),
// after which the replacement silently did nothing, the SW version froze,
// and clients never saw another update no matter how many times we deployed.
const src = _swSource.replace(
"typeof __BUILD_TAG__ !== 'undefined' ? __BUILD_TAG__ : 'v1.0.3'",
/typeof __BUILD_TAG__ !== 'undefined' \? __BUILD_TAG__ : '[^']*'/,
JSON.stringify(BUILD_TAG)
);
if (src === _swSource) {
console.error('[sw] BUILD_TAG injection failed — placeholder not found in sw.js');
}
return c.text(src, 200, {
'Content-Type': 'application/javascript; charset=utf-8',
'Cache-Control': 'no-store, no-cache, must-revalidate',