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https://github.com/morluto/rea
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morluto
17 lines
790 B
TypeScript
17 lines
790 B
TypeScript
/** Snapshot selected variables while preserving platform and caller precedence. */
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export const snapshotEnvironment = (
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environment: Readonly<NodeJS.ProcessEnv>,
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platform: NodeJS.Platform = process.platform,
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): Readonly<NodeJS.ProcessEnv> => {
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if (platform !== "win32") return Object.freeze({ ...environment });
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const selected = new Map<string, string | undefined>();
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// Fold aliases in caller order so an explicit later override wins before
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// this canonical environment crosses a Windows process boundary.
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for (const [key, value] of Object.entries(environment))
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selected.set(key.toUpperCase(), value);
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const snapshot: NodeJS.ProcessEnv = {};
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for (const key of [...selected.keys()].sort())
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snapshot[key] = selected.get(key);
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return Object.freeze(snapshot);
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};
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