mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-20 05:40:17 +08:00
Chris Tate
5d6611d52f
- Share program creation, checker queries, virtual files, and snapshot lifetimes between Node and native compiler clients. - Preserve typed async-context results and opaque compiler objects through checked native boundaries. - Support native realpath and Unicode Windows filesystem operations needed by the compiler host.
54 lines
2.1 KiB
TypeScript
54 lines
2.1 KiB
TypeScript
type Probe =
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| { op: "file"; path: string; digest: string }
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| { op: "entries"; path: string; files: string[] }
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| { op: "missing"; path: string };
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class Tracker {
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private readonly probes = new Map<string, Probe>();
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record(probe: Probe): void {
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const previous = this.probes.get(probe.path);
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const changed = previous !== undefined && JSON.stringify(previous) !== JSON.stringify(probe);
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console.log("record", changed);
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if (previous !== undefined) console.log("previous", JSON.stringify(previous));
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this.probes.set(probe.path, probe);
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}
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}
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const tracker = new Tracker();
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tracker.record({ op: "file", path: "a", digest: "one" });
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tracker.record({ op: "file", path: "a", digest: "one" });
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tracker.record({ op: "file", path: "a", digest: "two" });
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tracker.record({ op: "missing", path: "a" });
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tracker.record({ op: "entries", path: "a", files: ["first", "second"] });
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tracker.record({ op: "entries", path: "a", files: [] });
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const values = new Map<string, Probe>();
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const files: string[] = ["before"];
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values.set("list", { op: "entries", path: "b", files });
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const value = values.get("list");
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if (value !== undefined) {
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console.log("list", JSON.stringify(value, null, 2));
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files.push("after");
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console.log("identity", JSON.stringify(value));
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}
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const missing = values.get("absent");
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if (missing !== undefined) console.log("unreachable", JSON.stringify(missing));
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else console.log("missing");
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const strings = new Map<string, string>();
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strings.set("present", "hello");
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console.log("optional string", JSON.stringify(strings.get("present")), JSON.stringify(strings.get("absent")) === undefined);
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let lookups = 0;
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function lookup(): Probe | undefined {
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lookups++;
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return values.get("list");
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}
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const found = lookup();
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if (found !== undefined) console.log("once", JSON.stringify(found), lookups);
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function shadow(JSON: { stringify: (value: Probe | undefined) => string }): void {
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const absent = values.get("absent");
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console.log(JSON.stringify(absent));
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}
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shadow({ stringify: (value) => value === undefined ? "shadow received undefined" : "shadow received value" });
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