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Fix sourcemap warning in server islands plugin (#12877)

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Bjorn Lu 2025-01-03 22:43:22 +08:00 • committed by GitHub
parent 78bcad952e
commit 73a078835e
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2 changed files with 22 additions and 1 deletions
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5
.changeset/big-mugs-approve.md Normal file
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@ -0,0 +1,5 @@
---
'astro': patch
---
Fixes sourcemap warning generated by the `astro:server-islands` Vite plugin

18
packages/astro/src/core/server-islands/vite-plugin-server-islands.ts
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@ -1,3 +1,4 @@
import MagicString from 'magic-string';
import type { ConfigEnv, ViteDevServer, Plugin as VitePlugin } from 'vite';
import type { AstroPluginOptions } from '../../types/astro.js';
import type { AstroPluginMetadata } from '../../vite-plugin-astro/index.js';
@ -82,6 +83,15 @@ export function vitePluginServerIslands({ settings, logger }: AstroPluginOptions
},
renderChunk(code) {
if (code.includes(serverIslandPlaceholder)) {
// If there's no reference, we can fast-path to an empty map replacement
// without sourcemaps as it doesn't shift rows
if (referenceIdMap.size === 0) {
return {
code: code.replace(serverIslandPlaceholder, 'new Map();'),
map: null,
};
}
let mapSource = 'new Map([';
for (let [resolvedPath, referenceId] of referenceIdMap) {
const fileName = this.getFileName(referenceId);
@ -90,7 +100,13 @@ export function vitePluginServerIslands({ settings, logger }: AstroPluginOptions
}
mapSource += '\n]);';
referenceIdMap.clear();
return code.replace(serverIslandPlaceholder, mapSource);
const ms = new MagicString(code);
ms.replace(serverIslandPlaceholder, mapSource);
return {
code: ms.toString(),
map: ms.generateMap({ hires: 'boundary' }),
};
}
},
};