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2 years ago
'use strict';
exports.__esModule = true;
const fs = require('fs');
const Module = require('module');
const path = require('path');
const hashObject = require('./hash').hashObject;
const ModuleCache = require('./ModuleCache').default;
const pkgDir = require('./pkgDir').default;
const CASE_SENSITIVE_FS = !fs.existsSync(path.join(__dirname.toUpperCase(), 'reSOLVE.js'));
exports.CASE_SENSITIVE_FS = CASE_SENSITIVE_FS;
const ERROR_NAME = 'EslintPluginImportResolveError';
const fileExistsCache = new ModuleCache();
// Polyfill Node's `Module.createRequireFromPath` if not present (added in Node v10.12.0)
// Use `Module.createRequire` if available (added in Node v12.2.0)
const createRequire = Module.createRequire || Module.createRequireFromPath || function (filename) {
const mod = new Module(filename, null);
mod.filename = filename;
mod.paths = Module._nodeModulePaths(path.dirname(filename));
mod._compile(`module.exports = require;`, filename);
return mod.exports;
};
function tryRequire(target, sourceFile) {
let resolved;
try {
// Check if the target exists
if (sourceFile != null) {
try {
resolved = createRequire(path.resolve(sourceFile)).resolve(target);
} catch (e) {
resolved = require.resolve(target);
}
} else {
resolved = require.resolve(target);
}
} catch (e) {
// If the target does not exist then just return undefined
return undefined;
}
// If the target exists then return the loaded module
return require(resolved);
}
// https://stackoverflow.com/a/27382838
exports.fileExistsWithCaseSync = function fileExistsWithCaseSync(filepath, cacheSettings, strict) {
// don't care if the FS is case-sensitive
if (CASE_SENSITIVE_FS) return true;
// null means it resolved to a builtin
if (filepath === null) return true;
if (filepath.toLowerCase() === process.cwd().toLowerCase() && !strict) return true;
const parsedPath = path.parse(filepath);
const dir = parsedPath.dir;
let result = fileExistsCache.get(filepath, cacheSettings);
if (result != null) return result;
// base case
if (dir === '' || parsedPath.root === filepath) {
result = true;
} else {
const filenames = fs.readdirSync(dir);
if (filenames.indexOf(parsedPath.base) === -1) {
result = false;
} else {
result = fileExistsWithCaseSync(dir, cacheSettings, strict);
}
}
fileExistsCache.set(filepath, result);
return result;
};
function relative(modulePath, sourceFile, settings) {
return fullResolve(modulePath, sourceFile, settings).path;
}
function fullResolve(modulePath, sourceFile, settings) {
// check if this is a bonus core module
const coreSet = new Set(settings['import/core-modules']);
if (coreSet.has(modulePath)) return { found: true, path: null };
const sourceDir = path.dirname(sourceFile);
const cacheKey = sourceDir + hashObject(settings).digest('hex') + modulePath;
const cacheSettings = ModuleCache.getSettings(settings);
const cachedPath = fileExistsCache.get(cacheKey, cacheSettings);
if (cachedPath !== undefined) return { found: true, path: cachedPath };
function cache(resolvedPath) {
fileExistsCache.set(cacheKey, resolvedPath);
}
function withResolver(resolver, config) {
function v1() {
try {
const resolved = resolver.resolveImport(modulePath, sourceFile, config);
if (resolved === undefined) return { found: false };
return { found: true, path: resolved };
} catch (err) {
return { found: false };
}
}
function v2() {
return resolver.resolve(modulePath, sourceFile, config);
}
switch (resolver.interfaceVersion) {
case 2:
return v2();
default:
case 1:
return v1();
}
}
const configResolvers = (settings['import/resolver']
|| { 'node': settings['import/resolve'] }); // backward compatibility
const resolvers = resolverReducer(configResolvers, new Map());
for (const pair of resolvers) {
const name = pair[0];
const config = pair[1];
const resolver = requireResolver(name, sourceFile);
const resolved = withResolver(resolver, config);
if (!resolved.found) continue;
// else, counts
cache(resolved.path);
return resolved;
}
// failed
// cache(undefined)
return { found: false };
}
exports.relative = relative;
function resolverReducer(resolvers, map) {
if (Array.isArray(resolvers)) {
resolvers.forEach(r => resolverReducer(r, map));
return map;
}
if (typeof resolvers === 'string') {
map.set(resolvers, null);
return map;
}
if (typeof resolvers === 'object') {
for (const key in resolvers) {
map.set(key, resolvers[key]);
}
return map;
}
const err = new Error('invalid resolver config');
err.name = ERROR_NAME;
throw err;
}
function getBaseDir(sourceFile) {
return pkgDir(sourceFile) || process.cwd();
}
function requireResolver(name, sourceFile) {
// Try to resolve package with conventional name
const resolver = tryRequire(`eslint-import-resolver-${name}`, sourceFile) ||
tryRequire(name, sourceFile) ||
tryRequire(path.resolve(getBaseDir(sourceFile), name));
if (!resolver) {
const err = new Error(`unable to load resolver "${name}".`);
err.name = ERROR_NAME;
throw err;
}
if (!isResolverValid(resolver)) {
const err = new Error(`${name} with invalid interface loaded as resolver`);
err.name = ERROR_NAME;
throw err;
}
return resolver;
}
function isResolverValid(resolver) {
if (resolver.interfaceVersion === 2) {
return resolver.resolve && typeof resolver.resolve === 'function';
} else {
return resolver.resolveImport && typeof resolver.resolveImport === 'function';
}
}
const erroredContexts = new Set();
/**
* Given
* @param {string} p - module path
* @param {object} context - ESLint context
* @return {string} - the full module filesystem path;
* null if package is core;
* undefined if not found
*/
function resolve(p, context) {
try {
return relative(p, context.getPhysicalFilename ? context.getPhysicalFilename() : context.getFilename(), context.settings);
} catch (err) {
if (!erroredContexts.has(context)) {
// The `err.stack` string starts with `err.name` followed by colon and `err.message`.
// We're filtering out the default `err.name` because it adds little value to the message.
let errMessage = err.message;
if (err.name !== ERROR_NAME && err.stack) {
errMessage = err.stack.replace(/^Error: /, '');
}
context.report({
message: `Resolve error: ${errMessage}`,
loc: { line: 1, column: 0 },
});
erroredContexts.add(context);
}
}
}
resolve.relative = relative;
exports.default = resolve;