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Marc-André Bombeck
60f587c5a7
`public/sw.js` carries a `|| "..."` fallback literal used for `CACHE_VERSION`
when `importScripts('/sw-version.js')` is unavailable. The literal had drifted
to `v1.4.43`, four-plus minors behind `package.json`; in any environment where
the generated file is missing this keyed every cache to the stale version and
turned the activate-step eviction into a no-op — the exact bug the generator
was written to kill.
Extend the prebuild generator to rewrite the fallback literal in `sw.js` to the
current `package.json` version on every build, anchored on a
`/* @sw-version-fallback */` marker (the build fails loudly if the marker is
gone). The literal and the generated `sw-version.js` can no longer diverge.
The SW test now reads the fallback straight from the source so it tracks the
literal instead of hard-coding it.
57 lines
2.4 KiB
JavaScript
57 lines
2.4 KiB
JavaScript
#!/usr/bin/env node
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/**
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* v1.4.43 QoL (L3) — write the active package.json version into
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* `public/sw-version.js`. The Service Worker (`public/sw.js`) loads
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* this file via `importScripts('/sw-version.js')` and reads
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* `self.__APP_VERSION__` to key its `CACHE_VERSION`.
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*
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* Pre-fix the SW carried a hand-bumped literal that drifted four
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* releases stale; the `activate`-step's old-cache eviction became
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* a no-op for every deploy in v1.4.38.4 → v1.4.42. Running this
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* script as a `prebuild` step re-anchors the version on every build,
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* so the eviction now fires reliably.
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*
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* Idempotent: writes the file unconditionally. Safe to commit the
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* generated file or `.gitignore` it — either way `pnpm build` reruns
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* the generator.
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*/
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import { readFileSync, writeFileSync } from "node:fs";
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import { join, dirname } from "node:path";
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import { fileURLToPath } from "node:url";
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const __dirname = dirname(fileURLToPath(import.meta.url));
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const repoRoot = join(__dirname, "..");
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const pkgPath = join(repoRoot, "package.json");
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const outPath = join(repoRoot, "public", "sw-version.js");
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const swPath = join(repoRoot, "public", "sw.js");
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const pkg = JSON.parse(readFileSync(pkgPath, "utf8"));
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const version = `v${pkg.version}`;
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const banner =
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"// AUTO-GENERATED by scripts/generate-sw-version.mjs — do not edit.\n";
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const body = `self.__APP_VERSION__ = ${JSON.stringify(version)};\n`;
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writeFileSync(outPath, banner + body, "utf8");
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// Also re-anchor the in-`sw.js` fallback literal to the current version, so
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// the literal used when `/sw-version.js` is missing (dev, or a 404 on the
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// generated file) can never drift stale — it bit v1.4.38.4 → v1.4.42. The
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// `/* @sw-version-fallback */` marker is the rewrite anchor; the literal that
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// follows it is replaced in place. If the marker is gone the SW source has
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// been restructured and the build must surface that rather than silently skip
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// the re-anchor.
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const sw = readFileSync(swPath, "utf8");
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const fallbackPattern = /(\/\* @sw-version-fallback \*\/\s*)"v[^"]*"/;
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if (!fallbackPattern.test(sw)) {
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process.stderr.write(
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"generate-sw-version: @sw-version-fallback marker not found in public/sw.js\n",
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);
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process.exit(1);
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}
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const rewritten = sw.replace(fallbackPattern, `$1${JSON.stringify(version)}`);
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if (rewritten !== sw) writeFileSync(swPath, rewritten, "utf8");
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// One-line log so the build output shows the version we baked in.
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process.stdout.write(`sw-version.js → ${version} (sw.js fallback re-anchored)\n`);
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