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feat(vhd-lib): implement a limit in VhdSynthetic.fromVhdChain

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This commit is contained in:
Florent Beauchamp 2023-11-24 15:53:26 +00:00 committed by Julien Fontanet
parent 408fc5af84
commit b29d5ba95c
1 changed files with 6 additions and 2 deletions
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8
packages/vhd-lib/Vhd/VhdSynthetic.js
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@ -120,7 +120,8 @@ const VhdSynthetic = class VhdSynthetic extends VhdAbstract {
}
// add decorated static method
VhdSynthetic.fromVhdChain = Disposable.factory(async function* fromVhdChain(handler, childPath) {
// until is not included in the result , the chain will stop at its child
VhdSynthetic.fromVhdChain = Disposable.factory(async function* fromVhdChain(handler, childPath, { until } = {}) {
let vhdPath = childPath
let vhd
const vhds = []
@ -128,8 +129,11 @@ VhdSynthetic.fromVhdChain = Disposable.factory(async function* fromVhdChain(hand
vhd = yield openVhd(handler, vhdPath)
vhds.unshift(vhd) // from oldest to most recent
vhdPath = resolveRelativeFromFile(vhdPath, vhd.header.parentUnicodeName)
} while (vhd.footer.diskType !== DISK_TYPES.DYNAMIC)
} while (vhd.footer.diskType !== DISK_TYPES.DYNAMIC && vhdPath !== until)
if (until !== undefined && vhdPath !== until) {
throw new Error(`Didn't find ${until} as a parent of ${childPath}`)
}
const synthetic = new VhdSynthetic(vhds)
await synthetic.readHeaderAndFooter()
yield synthetic