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import resolve from "resolve/async";
import { resolveSymlink } from "./fs";
import { getPackageInfo, getPackageName } from "./util";
import { promisify } from "util";
import resolvePackageExports from "./package/resolvePackageExports";
import resolvePackageImports from "./package/resolvePackageImports";
import { findPackageJson, ResolveError } from "./package/utils";
import { createResolveFsOptions } from "../resolver/resolve";
const resolveImportPath = promisify(resolve);
async function getPackageJson(
importer,
pkgName,
resolveOptions,
moduleDirectories,
fs,
) {
if (importer) {
const selfPackageJsonResult = await findPackageJson(
importer,
moduleDirectories,
fs,
);
if (
selfPackageJsonResult &&
selfPackageJsonResult.pkgJson.name === pkgName
) {
// the referenced package name is the current package
return selfPackageJsonResult;
}
}
try {
const pkgJsonPath = await resolveImportPath(
`${pkgName}/package.json`,
resolveOptions,
);
const pkgJson = JSON.parse(await fs.readFile(pkgJsonPath, "utf8"));
return { pkgJsonPath, pkgJson, pkgPath: dirname(pkgJsonPath) };
} catch (_) {
return null;
}
}
async function resolveIdClassic({
importSpecifier,
packageInfoCache,
extensions,
mainFields,
preserveSymlinks,
useBrowserOverrides,
baseDir,
moduleDirectories,
modulePaths,
rootDir,
ignoreSideEffectsForRoot,
fs,
}) {
let hasModuleSideEffects = () => null;
let hasPackageEntry = true;
let packageBrowserField = false;
let packageInfo;
const filter = (pkg, pkgPath) => {
const info = getPackageInfo({
cache: packageInfoCache,
extensions,
pkg,
pkgPath,
mainFields,
preserveSymlinks,
useBrowserOverrides,
rootDir,
ignoreSideEffectsForRoot,
fs,
});
({
packageInfo,
hasModuleSideEffects,
hasPackageEntry,
packageBrowserField,
} = info);
return info.cachedPkg;
};
const resolveOptions = {
...createResolveFsOptions(fs),
basedir: await fs.realpath(baseDir),
extensions,
includeCoreModules: false,
moduleDirectory: moduleDirectories,
paths: modulePaths,
preserveSymlinks,
packageFilter: filter,
};
let location;
try {
location = await resolveImportPath(importSpecifier, resolveOptions);
} catch (error) {
if (error.code !== "MODULE_NOT_FOUND") {
throw error;
}
return null;
}
return {
location: preserveSymlinks ? location : await resolveSymlink(location, fs),
hasModuleSideEffects,
hasPackageEntry,
packageBrowserField,
packageInfo,
};
}
async function resolveWithExportMap({
importer,
importSpecifier,
exportConditions,
packageInfoCache,
extensions,
mainFields,
preserveSymlinks,
useBrowserOverrides,
baseDir,
moduleDirectories,
modulePaths,
rootDir,
ignoreSideEffectsForRoot,
allowExportsFolderMapping,
fs,
validateImportsExports,
}) {
Iif (importSpecifier.startsWith("#")) {
// this is a package internal import, resolve using package imports field
const resolveResult = await resolvePackageImports({
importSpecifier,
importer,
moduleDirs: moduleDirectories,
conditions: exportConditions,
validateImportsExports,
fs,
resolveId(id /* , parent*/) {
return resolveIdClassic({
importSpecifier: id,
packageInfoCache,
extensions,
mainFields,
preserveSymlinks,
useBrowserOverrides,
baseDir,
moduleDirectories,
modulePaths,
fs,
});
},
});
const location = resolveResult;
return {
location,
location: preserveSymlinks
? location
: await resolveSymlink(location, fs),
hasModuleSideEffects: () => null,
hasPackageEntry: true,
packageBrowserField: false,
// eslint-disable-next-line no-undefined
packageInfo: undefined,
};
}
const pkgName = getPackageName(importSpecifier);
Iif (pkgName) {
// it's a bare import, find the package.json and resolve using package exports if available
let hasModuleSideEffects = () => null;
let hasPackageEntry = true;
let packageBrowserField = false;
let packageInfo;
const filter = (pkg, pkgPath) => {
const info = getPackageInfo({
cache: packageInfoCache,
extensions,
pkg,
pkgPath,
mainFields,
preserveSymlinks,
useBrowserOverrides,
rootDir,
ignoreSideEffectsForRoot,
fs,
});
({
packageInfo,
hasModuleSideEffects,
hasPackageEntry,
packageBrowserField,
} = info);
return info.cachedPkg;
};
const resolveOptions = {
...createResolveFsOptions(fs),
basedir: await fs.realpath(baseDir),
extensions,
includeCoreModules: false,
moduleDirectory: moduleDirectories,
paths: modulePaths,
preserveSymlinks,
packageFilter: filter,
};
const result = await getPackageJson(
importer,
pkgName,
resolveOptions,
moduleDirectories,
fs,
);
if (result && result.pkgJson.exports) {
const { pkgJson, pkgJsonPath } = result;
const subpath =
pkgName === importSpecifier
? "."
: `.${importSpecifier.substring(pkgName.length)}`;
const pkgDr = pkgJsonPath.replace("package.json", "");
const pkgURL = pkgDr;
const context = {
importer,
importSpecifier,
moduleDirs: moduleDirectories,
pkgURL,
pkgJsonPath,
allowExportsFolderMapping,
conditions: exportConditions,
};
const resolvedPackageExport = await resolvePackageExports(
context,
subpath,
pkgJson.exports,
validateImportsExports,
);
const location = resolvedPackageExport;
if (location) {
return {
location: preserveSymlinks
? location
: await resolveSymlink(location, fs),
hasModuleSideEffects,
hasPackageEntry,
packageBrowserField,
packageInfo,
};
}
}
}
return null;
}
async function resolveWithClassic({
importer,
importSpecifierList,
exportConditions,
warn,
packageInfoCache,
extensions,
mainFields,
preserveSymlinks,
useBrowserOverrides,
baseDir,
moduleDirectories,
modulePaths,
rootDir,
ignoreSideEffectsForRoot,
fs,
}) {
for (let i = 0; i < importSpecifierList.length; i++) {
// eslint-disable-next-line no-await-in-loop
const result = await resolveIdClassic({
importer,
importSpecifier: importSpecifierList[i],
exportConditions,
warn,
packageInfoCache,
extensions,
mainFields,
preserveSymlinks,
useBrowserOverrides,
baseDir,
moduleDirectories,
modulePaths,
rootDir,
ignoreSideEffectsForRoot,
fs,
});
Eif (result) {
return result;
}
}
return null;
}
// Resolves to the module if found or `null`.
// The first import specifier will first be attempted with the exports algorithm.
// If this is unsuccessful because export maps are not being used, then all of `importSpecifierList`
// will be tried with the classic resolution algorithm
export default async function resolveImportSpecifiers({
importer,
importSpecifierList,
exportConditions,
warn,
packageInfoCache,
extensions,
mainFields,
preserveSymlinks,
useBrowserOverrides,
baseDir,
moduleDirectories,
modulePaths,
rootDir,
ignoreSideEffectsForRoot,
allowExportsFolderMapping,
fs,
validateImportsExports,
ignoreExports,
}) {
Eif (!ignoreExports) {
try {
const exportMapRes = await resolveWithExportMap({
importer,
importSpecifier: importSpecifierList[0],
exportConditions,
packageInfoCache,
extensions,
mainFields,
preserveSymlinks,
useBrowserOverrides,
baseDir,
moduleDirectories,
modulePaths,
rootDir,
ignoreSideEffectsForRoot,
allowExportsFolderMapping,
fs,
validateImportsExports,
});
Iif (exportMapRes) return exportMapRes;
} catch (error) {
if (error instanceof ResolveError) {
warn(error);
return null;
}
throw error;
}
}
// package has no imports or exports, use classic node resolve
return resolveWithClassic({
importer,
importSpecifierList,
exportConditions,
warn,
packageInfoCache,
extensions,
mainFields,
preserveSymlinks,
useBrowserOverrides,
baseDir,
moduleDirectories,
modulePaths,
rootDir,
ignoreSideEffectsForRoot,
fs,
});
}
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