33 lines
2.6 KiB
TypeScript
33 lines
2.6 KiB
TypeScript
import type {Registry} from '../canvas-core/types.ts';
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import {fault} from '../canvas-core/values.ts';
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import type {EngineSnapshot} from './contracts.ts';
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import type {DepotCut,DepotWrite} from './asset-depot.ts';
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import {sharedAssetRef} from './asset-depot.ts';
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import type {StorageLeader,StoragePort} from './storage-port.ts';
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import {resourceRetentionPins} from './resource-retention.ts';
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/** Derive one project's shared-byte manifest from the exact Root being persisted. */
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export async function prepareDepotCut(input:{snapshot:EngineSnapshot;registry:Registry;storage:StoragePort;leader:StorageLeader;authority:string;files:ReadonlyMap<string,Blob>;displays:ReadonlyMap<string,number>;temporary:ReadonlyMap<string,readonly string[]>;adoptedFiles?:ReadonlyMap<string,{readonly bytes:Blob;readonly rootRevision:number}>}):Promise<DepotCut>{
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const {snapshot,storage,leader,authority}=input,pins=resourceRetentionPins(snapshot,input.registry,input.displays,input.temporary),writes:DepotWrite[]=[];
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if(!storage.assetDepot)throw fault('asset_depot_unavailable');
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for(const resource of snapshot.runtime.resources.values())if(resource.stored&&resource.digest){
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const ref=sharedAssetRef({version:1,authority,digest:resource.digest,asset:resource.stored});
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if(ref.asset.id!==resource.id||ref.asset.bytes!==resource.byteLength)throw fault('shared_asset_identity_conflict',[resource.id]);
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let bytes:Blob|undefined;
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if(resource.retirement?.purgedAt===undefined&&pins.pins.has(resource.id)){
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const cached=await storage.assetDepot.read(leader,authority,resource.id);
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// The store enforces immutable identity even when bytes are already present.
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if(!cached?.bytes)bytes=input.files.get(resource.id)??await storage.readFile(leader,resource.id);
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}
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writes.push({ref,...(bytes?{bytes}:{})});
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}
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for(const [id,binding]of snapshot.runtime.assetBindings??[]){
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if(binding.authority!==authority||binding.asset.id!==id||snapshot.runtime.resources.has(id))throw fault('shared_asset_identity_conflict',[id]);
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const pending=input.adoptedFiles?.get(id),bytes=pending&&pending.rootRevision<=snapshot.rootRevision?pending.bytes:undefined;writes.push({ref:sharedAssetRef(binding),...(bytes?{bytes}:{})});
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}
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// A source/run envelope may refer to resources outside this project's upload table.
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// Its complete resource interpreter must be installed before global deletion is allowed.
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const complete=pins.complete&&!snapshot.runtime.loading&&![...(snapshot.runtime.imports?.values()??[])].some(job=>!['completed','partial','cancelled'].includes(job.status))&&snapshot.runtime.runs.size===0;
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return{version:1,authority,complete,pins:[...pins.pins].map(([id,owners])=>[id,[...owners]] as const),writes};
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}
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