Matt Van Hornandmorluto
d28b41ea4e
* feat(javascript): resolve exact package import aliases Resolve exact #alias specifiers against the importer's enclosing package.json imports map using the shared condition, array, and null target selection. Nested packages keep their own maps; missing keys, explicit nulls, and out-of-scope aliases report a precise reason. Wildcard, recursive, and external-package import targets remain unresolved. * fix(javascript): keep nested import aliases in CLI graphs Bound nested #alias requires produce application-graph require edges from the enclosing package. Node reports MODULE_NOT_FOUND when a nested package.json has no imports field, without inheriting the ancestor map. * fix(javascript): resolve literal package import keys before path admission * fix(javascript): preserve import keys and invalid-target fallback * fix(javascript): preserve unmatched package target arrays * fix(javascript): retain package target refusal evidence * test(browser): match real verifier startup budget --------- Co-authored-by: morluto <76467478+morluto@users.noreply.github.com>
1002 lines
36 KiB
TypeScript
1002 lines
36 KiB
TypeScript
import { isBuiltin } from "node:module";
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import { posix } from "node:path";
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import {
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normalizeJoinedLogicalPath,
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logicalPathEscapesRoot,
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} from "../../domain/artifactIdentity.js";
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import type { JavaScriptArtifactFile } from "../../domain/javascript/javascriptArtifactFiles.js";
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import {
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admitsCanonicalPathSyntax,
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hasScheme,
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htmlUrlText,
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looksExternal,
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percentDecodeUrlPath,
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stripQueryAndFragment,
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} from "../../domain/artifactPathSyntax.js";
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import {
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classifyPackageImportSpecifier,
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classifyPackageImportTargetString,
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lookupExactPackageImport,
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} from "../../domain/javascript/javascriptPackageImportAliases.js";
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type ArtifactPathResolutionContext =
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| "package-entrypoint"
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| "filesystem-expression"
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| "module-specifier"
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| "html-reference"
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| "url-reference";
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type UnresolvedArtifactPathStatus =
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| "not-found"
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| "unavailable"
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| "external"
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| "rejected";
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interface ArtifactPathResolutionBase {
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readonly declared_path: string;
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readonly resolution_context: ArtifactPathResolutionContext;
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readonly limitations: readonly string[];
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}
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/** Explicit outcome of artifact-confined path resolution. */
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export type ArtifactPathResolution = ArtifactPathResolutionBase &
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(
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| {
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readonly resolved_path: string;
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readonly resolution_status: "resolved";
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}
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| {
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readonly resolved_path: null;
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readonly resolution_status: UnresolvedArtifactPathStatus;
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}
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);
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/** Values needed to resolve a declaration without filesystem access. */
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export interface ResolveArtifactPathInput {
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readonly declaredPath: string;
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readonly sourcePath: string;
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readonly context: ArtifactPathResolutionContext;
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readonly files: ReadonlyMap<string, JavaScriptArtifactFile>;
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readonly htmlBaseHref?: string | null;
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readonly moduleKind?: "import" | "require";
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}
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const EXTENSIONS = [
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".js",
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".cjs",
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".mjs",
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".ts",
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".tsx",
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".json",
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".html",
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".node",
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];
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type CandidateResolution =
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| {
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readonly resolvedPath: string;
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readonly status: "resolved";
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readonly limitations: readonly string[];
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}
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| {
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readonly resolvedPath: null;
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readonly status: UnresolvedArtifactPathStatus;
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readonly limitations: readonly string[];
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};
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/** Resolve one declaration while preserving its original input identity. */
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export const resolveArtifactPathByContext = (
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input: ResolveArtifactPathInput,
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): ArtifactPathResolution => {
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const resolution = resolvePath(input);
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return resolution.status === "resolved"
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? {
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declared_path: input.declaredPath,
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resolution_context: input.context,
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resolved_path: resolution.resolvedPath,
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resolution_status: resolution.status,
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limitations: resolution.limitations,
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}
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: {
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declared_path: input.declaredPath,
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resolution_context: input.context,
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resolved_path: null,
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resolution_status: resolution.status,
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limitations: resolution.limitations,
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};
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};
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const resolvePath = (input: ResolveArtifactPathInput): CandidateResolution => {
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// Package import keys are literal lookup identities, not artifact paths.
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// The selected target is admitted separately by resolveExportTarget.
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if (
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input.context === "module-specifier" &&
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input.declaredPath.startsWith("#")
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)
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return resolvePackageImportAlias(input, input.declaredPath);
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const rejected = rejectDeclaration(input.declaredPath);
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if (rejected !== null) return rejected;
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const candidate = contextualCandidate(input);
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if (typeof candidate !== "string") return candidate;
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const confined = confineCandidate(candidate);
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if (typeof confined !== "string") return confined;
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if (input.context === "html-reference")
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return (
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resolveFileCandidates(input, [confined]) ??
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unresolvedCandidate("not-found", [
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`The exact HTML resource ${confined} was not found among the selected application files.`,
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])
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);
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return resolveCandidate(input, confined, new Set());
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};
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const rejectDeclaration = (declared: string): CandidateResolution | null => {
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if (declared.length === 0)
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return unresolvedCandidate("rejected", ["The declared path is empty."]);
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if (declared.includes("\0") || declared.includes("\\"))
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return unresolvedCandidate("rejected", [
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"NUL and backslash path syntax are not admitted for canonical artifact paths.",
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]);
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if (!admitsCanonicalPathSyntax(declared))
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return unresolvedCandidate("rejected", [
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"Encoded dot or separator bytes are rejected before artifact path resolution.",
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]);
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return null;
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};
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const contextualCandidate = (
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input: ResolveArtifactPathInput,
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): string | CandidateResolution => {
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const { context } = input;
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let declared =
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context === "html-reference" ||
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context === "url-reference" ||
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(context === "module-specifier" && input.moduleKind !== "require")
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? stripQueryAndFragment(input.declaredPath)
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: input.declaredPath;
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if (context === "html-reference") return htmlCandidate(input);
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if (context === "module-specifier") {
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const fileUrl = fileUrlPath(declared);
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if (fileUrl !== undefined) return fileUrl;
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if (hasScheme(declared))
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return unresolvedCandidate("external", [
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"URL and Node builtin schemes are outside static artifact module resolution.",
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]);
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if (!declared.startsWith(".") && !declared.startsWith("/"))
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return bareModuleCandidate(input, declared);
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if (input.moduleKind !== "require") {
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const decoded = decodeModuleUrlPath(declared);
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if (typeof decoded !== "string") return decoded;
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declared = decoded;
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}
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} else if (looksExternal(declared))
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return unresolvedCandidate("external", [
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"URL schemes and protocol-relative URLs are outside this local artifact path context.",
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]);
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if (context === "url-reference") {
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const decoded = percentDecodeUrlPath(declared);
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if (decoded === null)
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return unresolvedCandidate("rejected", [
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"The URL reference path percent-decodes to NUL or to bytes that are not UTF-8.",
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]);
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declared = decoded;
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}
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return relativeCandidate(input.sourcePath, declared);
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};
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const decodeModuleUrlPath = (
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declared: string,
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): string | CandidateResolution => {
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let decoded: string;
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try {
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decoded = decodeURIComponent(declared);
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} catch (cause: unknown) {
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void cause;
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return unresolvedCandidate("rejected", [
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"The module URL path contains malformed percent encoding.",
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]);
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}
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return decoded.includes("\0")
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? unresolvedCandidate("rejected", [
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"The decoded module URL path contains NUL.",
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])
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: decoded;
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};
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const relativeCandidate = (sourcePath: string, declared: string): string =>
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declared.startsWith("/")
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? declared.slice(1)
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: posix.join(posix.dirname(sourcePath), declared);
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const bareModuleCandidate = (
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input: ResolveArtifactPathInput,
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declared: string,
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): CandidateResolution => {
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const packageName = barePackageName(declared);
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if (packageName === null || isBuiltin(declared))
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return unresolvedCandidate("external", [
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"The bare specifier is a Node builtin or invalid package name.",
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]);
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if (input.moduleKind === "import" && packageName.includes("%"))
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return unresolvedCandidate("rejected", [
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"Percent signs are not admitted in ES module package names.",
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]);
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const self = commonJsSelfCandidate(input, declared);
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if (self !== null) return self;
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const subpath =
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declared === packageName ? "." : `.${declared.slice(packageName.length)}`;
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const source = input.files.get(input.sourcePath);
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let directory = posix.dirname(input.sourcePath);
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while (true) {
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const candidate = posix.join(directory, "node_modules", packageName);
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const metadata = readPackageMetadata(input, candidate);
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if (packageExportsEligible(input) && metadata.kind !== "absent")
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return resolvePackageSpecifier(input, candidate, subpath, metadata);
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if (subpath === ".") {
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const direct = resolveFileCandidates(input, fileCandidates(candidate));
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if (direct !== null) return direct;
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}
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if (hasContainerDirectory(input.files, candidate, source?.container_sha256))
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return resolvePackageSpecifier(input, candidate, subpath, metadata);
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if (directory === "." || directory === "") break;
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directory = posix.dirname(directory);
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}
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return unresolvedCandidate("external", [
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"No matching bare package was inventoried in an enclosing node_modules directory.",
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]);
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};
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/**
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* Nearest same-container package.json, stopping at a `node_modules` directory
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* so a nested package cannot inherit an ancestor's map.
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*/
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const enclosingPackageMetadata = (
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input: ResolveArtifactPathInput,
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):
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| Extract<PackageMetadata, { readonly kind: "available" | "unavailable" }>
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| { readonly kind: "none" } => {
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let directory = posix.dirname(input.sourcePath);
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while (posix.basename(directory) !== "node_modules") {
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const metadata = readPackageMetadata(input, directory);
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if (metadata.kind !== "absent") return metadata;
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if (directory === "." || directory === "") break;
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directory = posix.dirname(directory);
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}
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return { kind: "none" };
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};
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/**
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* Resolve an exact `#alias` against the importer's enclosing `imports` map.
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* Selected relative targets are exact files; patterns, recursive aliases, and
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* external-package targets stay unresolved without falling through.
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*/
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const resolvePackageImportAlias = (
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input: ResolveArtifactPathInput,
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specifier: string,
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): CandidateResolution => {
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const classified = classifyPackageImportSpecifier(specifier);
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if (classified.kind === "invalid")
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return unresolvedCandidate("rejected", [
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`The package import specifier ${JSON.stringify(specifier)} is invalid; "#" and specifiers that end with "/" are not valid import aliases.`,
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]);
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if (classified.kind === "pattern")
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return unresolvedCandidate("external", [
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`Wildcard and directory package import aliases remain unresolved; ${JSON.stringify(specifier)} is not an exact imports key.`,
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]);
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const metadata = enclosingPackageMetadata(input);
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if (metadata.kind === "none")
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return unresolvedCandidate("external", [
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`No enclosing package.json defines package import alias ${specifier}; package import maps do not cross package scopes.`,
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]);
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if (metadata.kind === "unavailable")
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return unresolvedCandidate("unavailable", [metadata.limitation]);
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const lookup = lookupExactPackageImport(metadata.imports, specifier);
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if (lookup.kind === "undefined-map")
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return unresolvedCandidate("external", [
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`Package metadata ${metadata.path} does not define package import alias ${specifier}.`,
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]);
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if (lookup.kind === "missing-key")
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return unresolvedCandidate("external", [
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`Package metadata ${metadata.path} does not define package import alias ${specifier}; it declares ${lookup.declared.join(", ") || "no imports keys"}.`,
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]);
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if (lookup.kind === "pattern-unresolved")
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return unresolvedCandidate("external", [
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`Wildcard package import aliases remain unresolved; package metadata ${metadata.path} has no exact imports key ${specifier}.`,
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]);
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const selected = selectPackageImportTarget(lookup.target, input.moduleKind);
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if (selected.status === "rejected")
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return unresolvedCandidate("rejected", [
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`Package metadata ${metadata.path}: ${selected.limitation}`,
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]);
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if (selected.status === "unmatched")
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return unresolvedCandidate("external", [
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`Package metadata ${metadata.path} declares no imports target for alias ${specifier} under the active conditions; it declares ${selected.declared.join(", ") || "no conditions"}.`,
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]);
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if (selected.status === "blocked")
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return unresolvedCandidate("external", [
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`Package metadata ${metadata.path} blocks import alias ${specifier} with ${selected.cause === "null" ? "an explicit null imports target" : "an empty imports target array"}.`,
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]);
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if (selected.status === "non-relative") {
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const target = classifyPackageImportTargetString(selected.value);
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return unresolvedCandidate("external", [
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target.kind === "recursive"
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? `Recursive package import aliases remain unresolved; package metadata ${metadata.path} maps ${specifier} to ${JSON.stringify(target.target)}.`
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: `External-package import targets remain unresolved; package metadata ${metadata.path} maps ${specifier} to ${JSON.stringify(target.target)}.`,
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]);
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}
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return resolveExportTarget(input, metadata.path, selected.value, "imports");
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};
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const selectPackageImportTarget = (
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value: unknown,
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moduleKind: ResolveArtifactPathInput["moduleKind"],
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):
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| { readonly status: "value"; readonly value: string }
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| { readonly status: "non-relative"; readonly value: string }
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| { readonly status: "blocked"; readonly cause: PackageTargetBlockCause }
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| { readonly status: "unmatched"; readonly declared: readonly string[] }
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| { readonly status: "rejected"; readonly limitation: string } => {
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const selected = selectExportTarget(
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value,
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packageExportConditions(moduleKind),
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"imports",
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);
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if (selected.kind === "invalid" || selected.kind === "invalid-config")
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return { status: "rejected", limitation: selected.limitation };
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if (selected.kind === "unmatched")
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return {
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status: "unmatched",
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declared: selected.declared,
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};
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if (selected.kind === "blocked")
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return { status: "blocked", cause: selected.cause };
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if (selected.kind === "non-relative")
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return { status: "non-relative", value: selected.value };
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return { status: "value", value: selected.value };
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};
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/** Self references use the nearest package scope before dependency lookup. */
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const commonJsSelfCandidate = (
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input: ResolveArtifactPathInput,
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declared: string,
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): CandidateResolution | null => {
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if (input.moduleKind !== "require" || !input.files.has(input.sourcePath))
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return null;
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const metadata = enclosingPackageMetadata(input);
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if (metadata.kind === "none") return null;
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if (metadata.kind === "unavailable")
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return unresolvedCandidate("unavailable", [metadata.limitation]);
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if (
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metadata.name === undefined ||
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metadata.exports === undefined ||
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(declared !== metadata.name && !declared.startsWith(`${metadata.name}/`))
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)
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return null;
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const subpath =
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declared === metadata.name
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? "."
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: `.${declared.slice(metadata.name.length)}`;
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// Self resolution does not apply the CommonJS dependency-name matcher.
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return resolvePackageExports(input, metadata.path, subpath, metadata.exports);
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};
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/** Package roots and exact subpaths share metadata and exports selection. */
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const resolvePackageSpecifier = (
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input: ResolveArtifactPathInput,
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directory: string,
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subpath: string,
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metadata: PackageMetadata,
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): CandidateResolution => {
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const exportsEligible = packageExportsEligible(input);
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if (exportsEligible && metadata.kind === "unavailable")
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return unresolvedCandidate("unavailable", [metadata.limitation]);
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const rawExports =
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exportsEligible && metadata.kind === "available"
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? metadata.exports
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: undefined;
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if (rawExports === undefined) {
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if (subpath === ".")
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return (
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resolveFileCandidates(input, fileCandidates(directory)) ??
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resolveDirectory(input, directory, metadata, new Set())
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);
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// Preserve the trailing slash for a package directory request.
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const candidate = confineCandidate(`${directory}/${subpath.slice(2)}`);
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return typeof candidate === "string"
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? resolveCandidate(input, candidate, new Set())
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: candidate;
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}
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return resolvePackageExports(
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input,
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posix.join(directory, "package.json"),
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subpath,
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rawExports,
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);
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};
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const resolvePackageExports = (
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input: ResolveArtifactPathInput,
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packagePath: string,
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subpath: string,
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rawExports: string | object,
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): CandidateResolution => {
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const exported = selectPackageExport(rawExports, subpath, input.moduleKind);
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if (exported.status === "rejected")
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return unresolvedCandidate("rejected", [
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`Package metadata ${packagePath}: ${exported.limitation}`,
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]);
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if (exported.status === "unmatched")
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return unresolvedCandidate("external", [
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`Directory package metadata ${packagePath} declares no exports target ${subpath === "." ? "for the active conditions" : `for subpath ${subpath}`}; exports encapsulation permits no file or index lookup. It declares ${exported.declared.join(", ") || "a root target only"}.`,
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]);
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if (exported.status === "blocked")
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return unresolvedCandidate("external", [
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`Directory package metadata ${packagePath} blocks subpath ${subpath} with ${exported.cause === "null" ? "an explicit null exports target" : "an empty exports target array"}.`,
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]);
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return resolveExportTarget(input, packagePath, exported.value);
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};
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/** An exports or import target is a URL naming one exact file for both Node loaders. */
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const resolveExportTarget = (
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input: ResolveArtifactPathInput,
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packagePath: string,
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target: string,
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mapKind: "exports" | "imports" = "exports",
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): CandidateResolution => {
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const rejected = rejectDeclaration(target);
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if (rejected !== null) return rejected;
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const decoded = decodeModuleUrlPath(stripQueryAndFragment(target));
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if (typeof decoded !== "string") return decoded;
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const candidate = confineCandidate(relativeCandidate(packagePath, decoded));
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if (typeof candidate !== "string") return candidate;
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return (
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resolveFileCandidates(input, [candidate]) ??
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exactPackageTargetNotFound(candidate, mapKind)
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);
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};
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const barePackageName = (specifier: string): string | null => {
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const segments = specifier.split("/");
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if (specifier.startsWith("@"))
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return segments.length >= 2 && segments[0] !== "" && segments[1] !== ""
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? `${segments[0]}/${segments[1]}`
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: null;
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return segments[0] === "" ? null : (segments[0] ?? null);
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};
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const packageExportsEligible = (input: ResolveArtifactPathInput): boolean => {
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if (input.moduleKind !== "require") return true;
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// Node's CommonJS exports matcher excludes percent-containing package names.
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|
// Compare the captured name so a scoped name cannot fall back to its scope.
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|
const match = /^((?:@[^/\\%]+\/)?[^./\\%][^/\\%]*)(\/.*)?$/.exec(
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input.declaredPath,
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);
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return match?.[1] === barePackageName(input.declaredPath);
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};
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const hasContainerDirectory = (
|
|
files: ReadonlyMap<string, JavaScriptArtifactFile>,
|
|
candidate: string,
|
|
containerSha256: string | undefined,
|
|
): boolean => {
|
|
if (
|
|
[...indexCandidates(candidate), posix.join(candidate, "package.json")].some(
|
|
(path) => {
|
|
const file = files.get(path);
|
|
return (
|
|
file !== undefined &&
|
|
(containerSha256 === undefined ||
|
|
file.container_sha256 === containerSha256)
|
|
);
|
|
},
|
|
)
|
|
)
|
|
return true;
|
|
// Inventory has files rather than directory entries. Any same-container
|
|
// descendant establishes a package directory even without package.json.
|
|
const prefix = `${candidate}/`;
|
|
for (const [path, file] of files)
|
|
if (
|
|
path.startsWith(prefix) &&
|
|
(containerSha256 === undefined ||
|
|
file.container_sha256 === containerSha256)
|
|
)
|
|
return true;
|
|
return false;
|
|
};
|
|
|
|
const htmlCandidate = (
|
|
input: ResolveArtifactPathInput,
|
|
): string | CandidateResolution => {
|
|
const declared = stripQueryAndFragment(htmlUrlText(input.declaredPath));
|
|
if (looksExternal(declared))
|
|
return unresolvedCandidate("external", [
|
|
"External HTML references are not mapped to local artifact assets.",
|
|
]);
|
|
const rawBase = input.htmlBaseHref;
|
|
const base =
|
|
rawBase === undefined || rawBase === null
|
|
? rawBase
|
|
: stripQueryAndFragment(htmlUrlText(rawBase));
|
|
if (base !== undefined && base !== null && looksExternal(base))
|
|
return unresolvedCandidate("external", [
|
|
"The document base href is external, so its script reference is not a local artifact path.",
|
|
]);
|
|
// Removing URL tabs and newlines can join an encoded dot or separator that
|
|
// the raw declaration split, so admit the parsed URL text again.
|
|
if (!admitsCanonicalPathSyntax(declared))
|
|
return unresolvedCandidate("rejected", [
|
|
"Encoded dot or separator bytes are rejected before artifact path resolution.",
|
|
]);
|
|
const declaredPath = percentDecodeUrlPath(declared);
|
|
if (declaredPath === null)
|
|
return unresolvedCandidate("rejected", [
|
|
"The HTML reference path percent-decodes to NUL or to bytes that are not UTF-8.",
|
|
]);
|
|
if (declaredPath.startsWith("/")) return declaredPath.slice(1);
|
|
if (base === undefined || base === null || base === "")
|
|
return declaredPath === ""
|
|
? input.sourcePath
|
|
: posix.join(posix.dirname(input.sourcePath), declaredPath);
|
|
// A local base href is a second untrusted path input; apply the same
|
|
// admission rules a declared path gets so it cannot smuggle traversal or
|
|
// separator syntax past canonicalization.
|
|
if (!admitsCanonicalPathSyntax(base))
|
|
return unresolvedCandidate("rejected", [
|
|
"The document base href uses NUL, backslash, or encoded dot and separator bytes that are not admitted for canonical artifact paths.",
|
|
]);
|
|
const decodedBase = percentDecodeUrlPath(base);
|
|
if (decodedBase === null)
|
|
return unresolvedCandidate("rejected", [
|
|
"The document base href path percent-decodes to NUL or to bytes that are not UTF-8.",
|
|
]);
|
|
const basePath = decodedBase.startsWith("/")
|
|
? decodedBase.slice(1)
|
|
: posix.join(posix.dirname(input.sourcePath), decodedBase);
|
|
if (declaredPath === "") return emptyHtmlReference(decodedBase, basePath);
|
|
return posix.join(htmlBaseDirectory(decodedBase, basePath), declaredPath);
|
|
};
|
|
|
|
const emptyHtmlReference = (
|
|
base: string,
|
|
basePath: string,
|
|
): string | CandidateResolution => {
|
|
if (!htmlBaseIsDirectory(base)) return basePath;
|
|
const confined = confineCandidate(basePath);
|
|
if (typeof confined !== "string") return confined;
|
|
return unresolvedCandidate("not-found", [
|
|
`The HTML reference resolves to directory ${confined || "."}, not an exact selected application file.`,
|
|
]);
|
|
};
|
|
|
|
/**
|
|
* The directory a relative HTML reference resolves against. A base path
|
|
* ending in "/" or in a "." or ".." segment is already a directory, because a
|
|
* relative reference resolves against the base URL's directory and those
|
|
* segments are dropped rather than stepped through.
|
|
*/
|
|
const htmlBaseIsDirectory = (base: string): boolean =>
|
|
base.endsWith("/") ||
|
|
base.endsWith("/.") ||
|
|
base.endsWith("/..") ||
|
|
base === "." ||
|
|
base === "..";
|
|
|
|
const htmlBaseDirectory = (base: string, basePath: string): string =>
|
|
htmlBaseIsDirectory(base) ? basePath : posix.dirname(basePath);
|
|
|
|
const confineCandidate = (candidate: string): string | CandidateResolution => {
|
|
const normalized = normalizeJoinedLogicalPath(candidate);
|
|
if (logicalPathEscapesRoot(normalized))
|
|
return unresolvedCandidate("rejected", [
|
|
"The resolved candidate escapes the canonical artifact root.",
|
|
]);
|
|
return normalized === "." ? "" : normalized;
|
|
};
|
|
|
|
type PackageMetadata =
|
|
| {
|
|
readonly kind: "available";
|
|
readonly path: string;
|
|
readonly name: string | undefined;
|
|
readonly exports: string | object | undefined;
|
|
readonly imports: object | undefined;
|
|
readonly main: unknown;
|
|
readonly module: unknown;
|
|
}
|
|
| { readonly kind: "absent" }
|
|
| { readonly kind: "unavailable"; readonly limitation: string };
|
|
|
|
const readPackageMetadata = (
|
|
input: ResolveArtifactPathInput,
|
|
directory: string,
|
|
): PackageMetadata => {
|
|
const path = posix.join(directory, "package.json");
|
|
const file = input.files.get(path);
|
|
const source = input.files.get(input.sourcePath);
|
|
if (
|
|
file === undefined ||
|
|
(source !== undefined && file.container_sha256 !== source.container_sha256)
|
|
)
|
|
return { kind: "absent" };
|
|
if (!file.text.included)
|
|
return {
|
|
kind: "unavailable",
|
|
limitation: `Directory package metadata ${path} was inventoried but its text is unavailable: ${file.text.reason}.`,
|
|
};
|
|
let value: unknown;
|
|
try {
|
|
value = JSON.parse(file.text.value);
|
|
} catch (cause: unknown) {
|
|
void cause;
|
|
return {
|
|
kind: "unavailable",
|
|
limitation: `Directory package metadata ${path} is not valid package JSON.`,
|
|
};
|
|
}
|
|
if (typeof value !== "object" || value === null)
|
|
return {
|
|
kind: "unavailable",
|
|
limitation: `Directory package metadata ${path} is not valid package JSON.`,
|
|
};
|
|
const name = Reflect.get(value, "name");
|
|
const exports = Reflect.get(value, "exports");
|
|
const imports = Reflect.get(value, "imports");
|
|
return {
|
|
kind: "available",
|
|
path,
|
|
name: typeof name === "string" ? name : undefined,
|
|
// Node's package reader ignores scalar root exports other than strings.
|
|
// Nested targets retain their raw values for exports validation.
|
|
exports:
|
|
typeof exports === "string" ||
|
|
(typeof exports === "object" && exports !== null)
|
|
? exports
|
|
: undefined,
|
|
// Import maps must be non-array objects; other shapes are not a map.
|
|
imports:
|
|
typeof imports === "object" && imports !== null && !Array.isArray(imports)
|
|
? imports
|
|
: undefined,
|
|
main: Reflect.get(value, "main"),
|
|
module: Reflect.get(value, "module"),
|
|
};
|
|
};
|
|
|
|
/** File and directory lookup never interprets a nested directory's exports. */
|
|
const resolveCandidate = (
|
|
input: ResolveArtifactPathInput,
|
|
candidate: string,
|
|
packageChain: ReadonlySet<string>,
|
|
): CandidateResolution =>
|
|
resolveFileCandidates(input, fileCandidates(candidate)) ??
|
|
resolveDirectory(
|
|
input,
|
|
candidate,
|
|
readPackageMetadata(input, candidate),
|
|
packageChain,
|
|
);
|
|
|
|
const resolveDirectory = (
|
|
input: ResolveArtifactPathInput,
|
|
directory: string,
|
|
metadata: PackageMetadata,
|
|
packageChain: ReadonlySet<string>,
|
|
): CandidateResolution => {
|
|
if (metadata.kind === "absent")
|
|
return (
|
|
resolveFileCandidates(input, indexCandidates(directory)) ??
|
|
notFoundCandidate()
|
|
);
|
|
if (metadata.kind === "unavailable")
|
|
return unresolvedCandidate("unavailable", [metadata.limitation]);
|
|
if (packageChain.has(metadata.path))
|
|
return unresolvedCandidate("unavailable", [
|
|
`Directory package entrypoint cycle includes ${metadata.path}.`,
|
|
]);
|
|
const preferred = [
|
|
metadata.main,
|
|
...(input.moduleKind === undefined ? [metadata.module] : []),
|
|
];
|
|
const entry = preferred.find((value) => value !== undefined);
|
|
if (entry === undefined)
|
|
return (
|
|
resolveFileCandidates(input, indexCandidates(directory)) ??
|
|
notFoundCandidate()
|
|
);
|
|
if (typeof entry !== "string" || entry.length === 0)
|
|
return unresolvedCandidate("unavailable", [
|
|
`Directory package metadata ${metadata.path} is not valid package JSON.`,
|
|
]);
|
|
const entryInput: ResolveArtifactPathInput = {
|
|
declaredPath: entry,
|
|
sourcePath: metadata.path,
|
|
context: "package-entrypoint",
|
|
files: input.files,
|
|
...(input.moduleKind === undefined ? {} : { moduleKind: input.moduleKind }),
|
|
};
|
|
const rejected = rejectDeclaration(entryInput.declaredPath);
|
|
if (rejected !== null) return rejected;
|
|
const candidate = contextualCandidate(entryInput);
|
|
if (typeof candidate !== "string") return candidate;
|
|
const confined = confineCandidate(candidate);
|
|
if (typeof confined !== "string") return confined;
|
|
const selected =
|
|
resolveFileCandidates(entryInput, [
|
|
...fileCandidates(confined),
|
|
...indexCandidates(confined),
|
|
]) ?? resolveFileCandidates(input, indexCandidates(directory));
|
|
if (selected !== null) return selected;
|
|
return resolveCandidate(
|
|
entryInput,
|
|
confined,
|
|
new Set([...packageChain, metadata.path]),
|
|
);
|
|
};
|
|
|
|
const resolveFileCandidates = (
|
|
input: ResolveArtifactPathInput,
|
|
candidates: readonly string[],
|
|
): CandidateResolution | null => {
|
|
const source = input.files.get(input.sourcePath);
|
|
for (const path of candidates) {
|
|
const target = input.files.get(path);
|
|
if (
|
|
target !== undefined &&
|
|
(source === undefined ||
|
|
target.container_sha256 === source.container_sha256)
|
|
)
|
|
return { resolvedPath: path, status: "resolved", limitations: [] };
|
|
}
|
|
return null;
|
|
};
|
|
|
|
const fileCandidates = (candidate: string): readonly string[] => [
|
|
candidate,
|
|
...EXTENSIONS.map((extension) => `${candidate}${extension}`),
|
|
];
|
|
|
|
const indexCandidates = (candidate: string): readonly string[] =>
|
|
EXTENSIONS.map((extension) => posix.join(candidate, `index${extension}`));
|
|
|
|
type PackageTargetBlockCause = "null" | "empty-array";
|
|
|
|
type PackageExportOutcome =
|
|
| { readonly status: "value"; readonly value: string }
|
|
| { readonly status: "rejected"; readonly limitation: string }
|
|
| { readonly status: "blocked"; readonly cause: PackageTargetBlockCause }
|
|
| { readonly status: "unmatched"; readonly declared: readonly string[] };
|
|
|
|
/** Only exact non-directory keys participate; wildcard expansion is unsupported. */
|
|
const selectPackageExport = (
|
|
value: unknown,
|
|
subpath: string,
|
|
moduleKind: ResolveArtifactPathInput["moduleKind"],
|
|
): PackageExportOutcome => {
|
|
let target = value;
|
|
let declared: string[] = [];
|
|
if (typeof value === "object" && value !== null && !Array.isArray(value)) {
|
|
const keys = Object.keys(value);
|
|
const hasSubpaths = keys.some((key) => key.startsWith("."));
|
|
if (hasSubpaths && keys.some((key) => !key.startsWith(".")))
|
|
return {
|
|
status: "rejected",
|
|
limitation:
|
|
"The package exports configuration mixes subpath keys and condition keys.",
|
|
};
|
|
declared = keys;
|
|
if (hasSubpaths) {
|
|
if (
|
|
subpath.endsWith("/") ||
|
|
subpath.includes("*") ||
|
|
!Object.hasOwn(value, subpath)
|
|
)
|
|
return { status: "unmatched", declared };
|
|
target = Reflect.get(value, subpath);
|
|
} else if (subpath !== ".") return { status: "unmatched", declared };
|
|
} else if (subpath !== ".") return { status: "unmatched", declared };
|
|
const selected = selectExportTarget(
|
|
target,
|
|
packageExportConditions(moduleKind),
|
|
);
|
|
if (selected.kind === "invalid" || selected.kind === "invalid-config")
|
|
return { status: "rejected", limitation: selected.limitation };
|
|
if (selected.kind === "unmatched")
|
|
return {
|
|
status: "unmatched",
|
|
declared: selected.declared,
|
|
};
|
|
if (selected.kind === "blocked")
|
|
return { status: "blocked", cause: selected.cause };
|
|
if (selected.kind === "non-relative")
|
|
return {
|
|
status: "rejected",
|
|
limitation: `The package exports target ${JSON.stringify(selected.value)} must start with "./".`,
|
|
};
|
|
return { status: "value", value: selected.value };
|
|
};
|
|
|
|
type ExportTargetOutcome =
|
|
| { readonly kind: "value"; readonly value: string }
|
|
| { readonly kind: "non-relative"; readonly value: string }
|
|
| { readonly kind: "blocked"; readonly cause: PackageTargetBlockCause }
|
|
| { readonly kind: "unmatched"; readonly declared: readonly string[] }
|
|
| { readonly kind: "invalid"; readonly limitation: string }
|
|
| { readonly kind: "invalid-config"; readonly limitation: string };
|
|
|
|
const invalidExportTarget = (
|
|
value: unknown,
|
|
reason: string,
|
|
mapKind: "exports" | "imports" = "exports",
|
|
): ExportTargetOutcome => ({
|
|
kind: "invalid",
|
|
limitation: `The package ${mapKind === "imports" ? "import" : "exports"} target ${JSON.stringify(value) ?? String(value)} ${reason}.`,
|
|
});
|
|
|
|
// Node checks raw target segments before URL normalization. Compare encoded
|
|
// segment names here; full URL decoding follows array target selection.
|
|
const forbiddenExportSegment = (value: string): string | undefined =>
|
|
value
|
|
.slice(2)
|
|
.split(/[\\/]/u)
|
|
.find((raw) => {
|
|
const segment = raw.replace(/%[0-9a-f]{2}/giu, (encoded) =>
|
|
String.fromCharCode(Number.parseInt(encoded.slice(1), 16)),
|
|
);
|
|
return (
|
|
segment === "." ||
|
|
segment === ".." ||
|
|
segment.toLowerCase() === "node_modules"
|
|
);
|
|
});
|
|
|
|
const selectStringPackageTarget = (
|
|
value: string,
|
|
mapKind: "exports" | "imports",
|
|
): ExportTargetOutcome => {
|
|
if (mapKind === "imports") {
|
|
const target = classifyPackageImportTargetString(value);
|
|
if (target.kind === "invalid")
|
|
return invalidExportTarget(
|
|
value,
|
|
"cannot be parent-relative, absolute, or a URL",
|
|
mapKind,
|
|
);
|
|
if (target.kind !== "relative") return { kind: "non-relative", value };
|
|
} else if (!value.startsWith("./"))
|
|
return invalidExportTarget(value, 'must start with "./"', mapKind);
|
|
const forbidden = forbiddenExportSegment(value);
|
|
return forbidden === undefined
|
|
? { kind: "value", value }
|
|
: invalidExportTarget(
|
|
value,
|
|
`contains forbidden path segment ${JSON.stringify(forbidden)} before URL normalization`,
|
|
mapKind,
|
|
);
|
|
};
|
|
|
|
const selectArrayPackageTarget = (
|
|
value: readonly unknown[],
|
|
conditions: ReadonlySet<string>,
|
|
mapKind: "exports" | "imports",
|
|
): ExportTargetOutcome => {
|
|
if (value.length === 0) return { kind: "blocked", cause: "empty-array" };
|
|
let lastRefusal:
|
|
| Extract<ExportTargetOutcome, { readonly kind: "invalid" | "blocked" }>
|
|
| undefined;
|
|
const declared = new Set<string>();
|
|
for (const entry of value) {
|
|
const nested = selectExportTarget(entry, conditions, mapKind);
|
|
// Node's array fallback catches invalid targets, not invalid configuration.
|
|
if (nested.kind === "invalid-config") return nested;
|
|
if (nested.kind === "unmatched") {
|
|
for (const condition of nested.declared) declared.add(condition);
|
|
continue;
|
|
}
|
|
if (nested.kind === "invalid" || nested.kind === "blocked") {
|
|
lastRefusal = nested;
|
|
continue;
|
|
}
|
|
return nested;
|
|
}
|
|
return lastRefusal ?? { kind: "unmatched", declared: [...declared] };
|
|
};
|
|
|
|
/**
|
|
* Resolve a target in Node's declared order. Explicit null blocks an active
|
|
* condition, whereas an unmatched nested object permits the next condition.
|
|
* An array skips unmatched and invalid entries, stops at its first string, and
|
|
* preserves the last invalid/null outcome if no string is selected. A nonempty
|
|
* array of unmatched conditions stays unmatched; an empty array blocks.
|
|
*/
|
|
const selectExportTarget = (
|
|
value: unknown,
|
|
conditions: ReadonlySet<string>,
|
|
mapKind: "exports" | "imports" = "exports",
|
|
): ExportTargetOutcome => {
|
|
if (typeof value === "string")
|
|
return selectStringPackageTarget(value, mapKind);
|
|
if (value === null) return { kind: "blocked", cause: "null" };
|
|
if (Array.isArray(value))
|
|
return selectArrayPackageTarget(value, conditions, mapKind);
|
|
if (typeof value !== "object")
|
|
return invalidExportTarget(
|
|
value,
|
|
"must be a relative string, object, array, or null",
|
|
mapKind,
|
|
);
|
|
for (const key of Object.keys(value)) {
|
|
const numeric = Number(key);
|
|
if (String(numeric) === key && numeric >= 0 && numeric < 0xffff_ffff)
|
|
return {
|
|
kind: "invalid-config",
|
|
limitation: `The package exports configuration contains numeric condition key ${JSON.stringify(key)}.`,
|
|
};
|
|
}
|
|
const declared = new Set<string>();
|
|
for (const [condition, target] of Object.entries(value)) {
|
|
declared.add(condition);
|
|
if (!conditions.has(condition)) continue;
|
|
const nested = selectExportTarget(target, conditions, mapKind);
|
|
if (nested.kind !== "unmatched") return nested;
|
|
for (const name of nested.declared) declared.add(name);
|
|
}
|
|
return { kind: "unmatched", declared: [...declared] };
|
|
};
|
|
|
|
/**
|
|
* Node selects an exports target by walking the declared keys in order and
|
|
* taking the first whose condition is active for the calling resolver.
|
|
* "default" is always active, and "node" plus "node-addons" are active for the
|
|
* built-in resolver that owns installed-package imports and requires. The
|
|
* supported Node runtimes also activate "module-sync" for both loaders.
|
|
*/
|
|
const packageExportConditions = (
|
|
moduleKind: ResolveArtifactPathInput["moduleKind"],
|
|
): ReadonlySet<string> =>
|
|
new Set([
|
|
"node",
|
|
"node-addons",
|
|
"module-sync",
|
|
...(moduleKind === undefined ? [] : [moduleKind]),
|
|
"default",
|
|
]);
|
|
|
|
const notFoundCandidate = (): CandidateResolution => ({
|
|
resolvedPath: null,
|
|
status: "not-found",
|
|
limitations: [
|
|
"No extension, directory package, or index candidate exists in the inventoried artifact container.",
|
|
],
|
|
});
|
|
|
|
const exactPackageTargetNotFound = (
|
|
path: string,
|
|
mapKind: "exports" | "imports",
|
|
): CandidateResolution => ({
|
|
resolvedPath: null,
|
|
status: "not-found",
|
|
limitations: [
|
|
`The selected package ${mapKind === "imports" ? "import" : "exports"} target ${path} does not exist in the inventoried artifact container; ${mapKind === "imports" ? "import" : "exports"} targets are exact files, so no extension or directory index was tried.`,
|
|
],
|
|
});
|
|
|
|
const fileUrlPath = (value: string): string | undefined => {
|
|
if (!value.startsWith("file://")) return undefined;
|
|
try {
|
|
const url = new URL(value);
|
|
if (url.protocol !== "file:" || url.hostname !== "") return undefined;
|
|
return decodeURIComponent(url.pathname).replace(/^\/+/, "");
|
|
} catch (cause: unknown) {
|
|
// Unparseable file URLs have no path to resolve.
|
|
void cause;
|
|
return undefined;
|
|
}
|
|
};
|
|
|
|
const unresolvedCandidate = (
|
|
status: UnresolvedArtifactPathStatus,
|
|
limitations: readonly string[],
|
|
): CandidateResolution => ({ resolvedPath: null, status, limitations });
|