jschoubben
81dc74734b
registry (docker v2): catalog/tags/delete tools, emits image.pushed (a build's image is now pullable). verdaccio (npm): list/info tools, emits package.published. portainer: endpoints/stacks/containers tools — tools-only, since its only events are the underlying containers' lifecycle, which the host owns. Typecheck; manifests parse.
52 lines
1.9 KiB
TypeScript
52 lines
1.9 KiB
TypeScript
// registry's events. The tool runtime imports this once the broker is bound.
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//
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// Emits (novox/hq ADR 0046/0047):
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// module.registry.image.pushed — a new image (repo:tag) was published to the registry
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//
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// This is a genuinely useful signal: a build finished and its image is now pullable, so anything
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// on the mesh that redeploys, mirrors or announces releases can react without polling the registry
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// itself. It is discovered by diffing the catalog and each repo's tags — the registry has no push
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// webhook of its own, so the module watches for it.
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//
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// The polling is deliberately unhurried: a new image a minute late is still the event, whereas
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// hammering the registry's catalog for immediacy nobody asked for is not.
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import { emit } from "@novox/mesh-sdk/events";
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import { RegistryClient } from "./client.js";
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const registry = RegistryClient.fromEnv();
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// Every repo:tag we have already accounted for. Primed silently on the first look so a registry
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// that was already full when this started does not announce its whole history as freshly pushed.
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const seen = new Set<string>();
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let primed = false;
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async function pollCatalog(): Promise<void> {
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const repos = await registry.listRepositories();
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for (const repo of repos) {
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let tags: string[];
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try {
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tags = await registry.listTags(repo);
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} catch {
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continue; // a repo can vanish between catalog and tag read — skip it, catch it next tick
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}
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for (const tag of tags) {
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const id = `${repo}:${tag}`;
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if (!seen.has(id)) {
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if (primed) await emit("module.registry.image.pushed", { repo, tag });
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seen.add(id);
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}
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}
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}
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primed = true;
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}
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const tick = (fn: () => Promise<void>, everyMs: number): void => {
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const run = (): void => void fn().catch((err) => console.error(`[registry] ${err}`));
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setInterval(run, everyMs);
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run();
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};
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tick(pollCatalog, 60_000);
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console.log("[registry] watching the catalog for newly pushed images");
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