23 lines
941 B
TypeScript
23 lines
941 B
TypeScript
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import { posix } from "node:path";
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/** Loader evidence retained for a source-level module reference. */
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export type JavaScriptModuleResolutionMode =
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| "import"
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| "require"
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| "compiler-dependent";
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/** Derive source mode only when syntax or an explicit source format owns it. */
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export const moduleResolutionModeForJavaScriptReference = (
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sourcePath: string,
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referenceKind: "static-import" | "dynamic-import" | "require",
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explicitMode?: JavaScriptModuleResolutionMode,
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): JavaScriptModuleResolutionMode => {
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if (explicitMode !== undefined) return explicitMode;
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if (referenceKind === "require") return "require";
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if (referenceKind === "dynamic-import") return "import";
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const extension = posix.extname(sourcePath).toLowerCase();
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if (extension === ".cts") return "require";
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if (extension === ".mts") return "import";
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if (extension === ".ts" || extension === ".tsx") return "compiler-dependent";
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return "import";
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};
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