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Merge pull request #2347 from balena-io/klutchell/set-zlib-flush

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os download: Avoid incomplete os downloads appearing as successful
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bulldozer-balena[bot] 2021-09-21 21:35:23 +00:00 committed by GitHub
commit 52ad0f6a57
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8
lib/utils/cloud.ts
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@ -139,6 +139,14 @@ export async function downloadOSImage(
const displayVersion = OSVersion === 'default' ? '' : ` ${OSVersion}`;
// Override the default zlib flush value as we've seen cases of
// incomplete files being identified as successful downloads when using Z_SYNC_FLUSH.
// Using Z_NO_FLUSH results in a Z_BUF_ERROR instead of a corrupt image file.
// https://github.com/nodejs/node/blob/master/doc/api/zlib.md#zlib-constants
// Hopefully this is a temporary workaround until we can resolve
// some ongoing issues with the os download stream.
process.env.ZLIB_FLUSH = 'Z_NO_FLUSH';
const manager = await import('balena-image-manager');
const stream = await manager.get(deviceType, OSVersion);