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Copy pathSourceMapCodecProcess.ts
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59 lines (57 loc) · 2.02 KB
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import { readStableArtifact } from "../../artifacts/readStableArtifact.js";
import { WEB_SOURCE_MAP_LIMITS } from "../../domain/webSourceLocation.js";
import { traceSourceMap } from "./TraceSourceMap.js";
import { SourceMapFormatFailure } from "./SourceMapFormat.js";
import {
sourceMapCodecInputSchema,
sourceMapCodecReplySchema,
} from "./SourceMapCodecProtocol.js";
import { z } from "zod";
/** Dedicated process entrypoint invoked only for an explicitly selected map. */
const execute = async (): Promise<string> => {
try {
const path = process.argv[2];
if (path === undefined)
throw new SourceMapFormatFailure(
"format",
"Codec request path is missing.",
);
const data = await readStableArtifact(
path,
WEB_SOURCE_MAP_LIMITS.outputBytes,
);
const text = new TextDecoder("utf-8", { fatal: true }).decode(data.bytes);
const value: unknown = JSON.parse(text);
const input = sourceMapCodecInputSchema.parse(value);
if (Buffer.byteLength(input.text) > WEB_SOURCE_MAP_LIMITS.mapBytes)
throw new SourceMapFormatFailure(
"limit",
"Source map exceeds the 4 MiB codec input budget.",
);
const report = traceSourceMap(input.text, input.url, input.position);
const reply = JSON.stringify(
sourceMapCodecReplySchema.parse({ state: "success", report }),
);
if (Buffer.byteLength(reply) > WEB_SOURCE_MAP_LIMITS.outputBytes)
throw new SourceMapFormatFailure(
"limit",
"Complete source-map point evidence exceeds the 32 MiB output budget; no partial evidence was returned.",
);
return reply;
} catch (cause: unknown) {
if (
!(
cause instanceof SourceMapFormatFailure ||
cause instanceof z.ZodError ||
cause instanceof SyntaxError
)
)
throw cause;
return JSON.stringify({
state: "failure",
reason: cause instanceof SourceMapFormatFailure ? cause.reason : "format",
message: cause.message,
});
}
};
process.stdout.write(await execute());