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Chunk resources.tar into 50MB chunks for jsDelivr #4

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Merged
merged 2 commits into from
Oct 29, 2025
Merged

Chunk resources.tar into 50MB chunks for jsDelivr #4

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d5edfa8
Chunk resources.tar into 50MB chunks for jsDelivr
kokjo Oct 29, 2025
db4614e
Rewrite chunks as a generator
kokjo Oct 29, 2025
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32 changes: 23 additions & 9 deletions bin/pack-resources.js
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Original file line number Diff line number Diff line change
Expand Up @@ -67,9 +67,17 @@ for (const dirent of await readdir(wasmDirectory, { withFileTypes: true })) {
output += `\
});

const filesystem = async (fetch) => ({
const filesystem = async (fetch) => {
var chunks = [];
`;

function* chunks(data, length) {
while (data.length != 0) {
yield data.subarray(0, length);
data = data.subarray(length);
}
}

if (shareDirectory !== undefined) {
const tarEntries = [];
async function archivePath(pathName) {
Expand All @@ -89,19 +97,25 @@ if (shareDirectory !== undefined) {
}
await archivePath(shareDirectory);
const tarData = createTar(tarEntries);
const tarFilePath = resourceFilePath.replace(/\.js$/, '.tar');
await writeFile(tarFilePath, tarData);

const tarFileName = tarFilePath.replace(/^.+\//, '');
var i = 0;
for(const chunk of chunks(tarData, 50*1024*1024)) {
const tarFileChunkPath = resourceFilePath.replace(/\.js$/, `.${i}.tar`);
await writeFile(tarFileChunkPath, chunk);
const tarFileChunkName = tarFileChunkPath.replace(/^.+\//, '');
output += `\
chunks.push(await ${await fetchExpr(tarFileChunkPath, `./${tarFileChunkName}`)}.then((resp) => resp.arrayBuffer()));
`
i += 1;
}
output += `\
${JSON.stringify(shareRoot)}: await ${await fetchExpr(tarFilePath, `./${tarFileName}`)}
.then((resp) => resp.arrayBuffer())
.then(unpackTarFilesystem)
return {
${JSON.stringify(shareRoot)}: await new Blob(chunks).arrayBuffer().then(unpackTarFilesystem)
};
`;
}

output += `\
});
};

const totalSize = ${totalSize};

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