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const {
JSONParse,
ObjectPrototypeHasOwnProperty,
SafeMap,
StringPrototypeEndsWith,
} = primordials;
const { URL, fileURLToPath } = require('internal/url');
const {
ERR_INVALID_PACKAGE_CONFIG,
} = require('internal/errors').codes;
const packageJsonReader = require('internal/modules/package_json_reader');
const { filterOwnProperties } = require('internal/util');
/**
* @typedef {string | string[] | Record<string, unknown>} Exports
* @typedef {'module' | 'commonjs'} PackageType
* @typedef {{
* pjsonPath: string,
* exports?: ExportConfig,
* name?: string,
* main?: string,
* type?: PackageType,
* }} PackageConfig
*/
/** @type {Map<string, PackageConfig>} */
const packageJSONCache = new SafeMap();
/**
* @param {string} path
* @param {string} specifier
* @param {string | URL | undefined} base
* @returns {PackageConfig}
*/
function getPackageConfig(path, specifier, base) {
const existing = packageJSONCache.get(path);
if (existing !== undefined) {
return existing;
}
const source = packageJsonReader.read(path).string;
if (source === undefined) {
const packageConfig = {
pjsonPath: path,
exists: false,
main: undefined,
name: undefined,
type: 'none',
exports: undefined,
imports: undefined,
};
packageJSONCache.set(path, packageConfig);
return packageConfig;
}
let packageJSON;
try {
packageJSON = JSONParse(source);
} catch (error) {
throw new ERR_INVALID_PACKAGE_CONFIG(
path,
(base ? `"${specifier}" from ` : '') + fileURLToPath(base || specifier),
error.message
);
}
let { imports, main, name, type } = filterOwnProperties(packageJSON, ['imports', 'main', 'name', 'type']);
const exports = ObjectPrototypeHasOwnProperty(packageJSON, 'exports') ? packageJSON.exports : undefined;
if (typeof imports !== 'object' || imports === null) {
imports = undefined;
}
if (typeof main !== 'string') {
main = undefined;
}
if (typeof name !== 'string') {
name = undefined;
}
// Ignore unknown types for forwards compatibility
if (type !== 'module' && type !== 'commonjs') {
type = 'none';
}
const packageConfig = {
pjsonPath: path,
exists: true,
main,
name,
type,
exports,
imports,
};
packageJSONCache.set(path, packageConfig);
return packageConfig;
}
/**
* @param {URL | string} resolved
* @returns {PackageConfig}
*/
function getPackageScopeConfig(resolved) {
let packageJSONUrl = new URL('./package.json', resolved);
while (true) {
const packageJSONPath = packageJSONUrl.pathname;
if (StringPrototypeEndsWith(packageJSONPath, 'node_modules/package.json')) {
break;
}
const packageConfig = getPackageConfig(fileURLToPath(packageJSONUrl), resolved);
if (packageConfig.exists) {
return packageConfig;
}
const lastPackageJSONUrl = packageJSONUrl;
packageJSONUrl = new URL('../package.json', packageJSONUrl);
// Terminates at root where ../package.json equals ../../package.json
// (can't just check "/package.json" for Windows support).
if (packageJSONUrl.pathname === lastPackageJSONUrl.pathname) {
break;
}
}
const packageJSONPath = fileURLToPath(packageJSONUrl);
const packageConfig = {
pjsonPath: packageJSONPath,
exists: false,
main: undefined,
name: undefined,
type: 'none',
exports: undefined,
imports: undefined,
};
packageJSONCache.set(packageJSONPath, packageConfig);
return packageConfig;
}
module.exports = {
getPackageConfig,
getPackageScopeConfig,
};
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