73 lines
2.8 KiB
TypeScript
73 lines
2.8 KiB
TypeScript
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import * as t from "@babel/types";
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import { builtinDataEffectCallablePath } from "./javascriptSemanticDataEffectHelpers.js";
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import type { JavaScriptBindingIndex } from "./javascriptSemanticState.js";
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import { completeSemanticSteps } from "./javascriptSemanticTraversal.js";
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import { evaluateSemanticExpressionProvenance } from "./javascriptSemanticValues.js";
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import {
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isUnmodifiedGlobalReference,
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isUnmodifiedImportMetaUrl,
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} from "./javascriptSemanticAmbientWrites.js";
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import { unwrapJavaScriptExpression } from "./javascriptAstValues.js";
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import type { JavaScriptStaticPathIntrinsicQuery } from "./javascriptStaticAnalysisHelpers.js";
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/** Prove Node's path resolver before applying its argument-selection semantics. */
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export const createStaticNodePathResolveQuery = (
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index: JavaScriptBindingIndex,
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): JavaScriptStaticPathIntrinsicQuery => {
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const facts = new WeakMap<t.Node, boolean>();
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const nativeMethod = (
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callee: t.Node,
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method: string,
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modules: readonly string[],
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): boolean => {
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const provenance = evaluateSemanticExpressionProvenance(
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callee,
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index.bindings,
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);
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if (
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provenance.status !== "module" ||
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provenance.origins[0].importedPath.at(-1) !== method ||
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!modules.includes(provenance.origins[0].specifier.replace(/^node:/u, ""))
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)
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return false;
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completeSemanticSteps(index.indexMemberMutationFactsSteps());
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const path = builtinDataEffectCallablePath(callee, index.bindings, modules);
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return (
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path !== null &&
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((path.length === 1 && path[0] === method) ||
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(modules.includes("path") &&
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path.length === 2 &&
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path[0] === "posix" &&
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path[1] === method))
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);
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};
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const sourceFile = (node: t.Node | undefined): boolean => {
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if (node === undefined) return false;
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node = unwrapJavaScriptExpression(node).node;
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if (t.isIdentifier(node, { name: "__filename" }))
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return isUnmodifiedGlobalReference(node, index.bindings, "__filename");
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return (
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t.isCallExpression(node) &&
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node.arguments.length === 1 &&
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nativeMethod(node.callee, "fileURLToPath", ["url"]) &&
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isUnmodifiedImportMetaUrl(node.arguments[0], index.bindings)
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);
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};
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return (callee, fact) => {
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if (fact === "source-directory") {
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callee = unwrapJavaScriptExpression(callee).node;
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return t.isIdentifier(callee, { name: "__dirname" })
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? isUnmodifiedGlobalReference(callee, index.bindings, "__dirname")
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: t.isCallExpression(callee) &&
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callee.arguments.length === 1 &&
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nativeMethod(callee.callee, "dirname", ["path", "path/posix"]) &&
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sourceFile(callee.arguments[0]);
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}
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const cached = facts.get(callee);
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if (cached !== undefined) return cached;
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const proven = nativeMethod(callee, "resolve", ["path", "path/posix"]);
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facts.set(callee, proven);
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return proven;
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};
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};
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