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/**
* @fileoverview Utility functions for React and Flow version configuration
* @author Yannick Croissant
*/
'use strict';
const fs = require('fs');
const resolve = require('resolve');
const path = require('path');
const semver = require('semver');
const error = require('./error');
let warnedForMissingVersion = false;
function resetWarningFlag() {
warnedForMissingVersion = false;
}
let cachedDetectedReactVersion;
function resetDetectedVersion() {
cachedDetectedReactVersion = undefined;
}
function resolveBasedir(contextOrFilename) {
if (contextOrFilename) {
const filename = typeof contextOrFilename === 'string' ? contextOrFilename : contextOrFilename.getFilename();
const dirname = path.dirname(filename);
try {
if (fs.statSync(filename).isFile()) {
// dirname must be dir here
return dirname;
}
} catch (err) {
// https://github.com/eslint/eslint/issues/11989
if (err.code === 'ENOTDIR') {
// virtual filename could be recursive
return resolveBasedir(dirname);
}
}
}
return process.cwd();
}
// TODO, semver-major: remove context fallback
function detectReactVersion(context) {
if (cachedDetectedReactVersion) {
return cachedDetectedReactVersion;
}
const basedir = resolveBasedir(context);
try {
const reactPath = resolve.sync('react', { basedir });
const react = require(reactPath); // eslint-disable-line global-require, import/no-dynamic-require
cachedDetectedReactVersion = react.version;
return cachedDetectedReactVersion;
} catch (e) {
if (e.code === 'MODULE_NOT_FOUND') {
if (!warnedForMissingVersion) {
error('Warning: React version was set to "detect" in eslint-plugin-react settings, '
+ 'but the "react" package is not installed. Assuming latest React version for linting.');
warnedForMissingVersion = true;
}
cachedDetectedReactVersion = '999.999.999';
return cachedDetectedReactVersion;
}
throw e;
}
}
const defaultVersion = '999.999.999';
function getReactVersionFromContext(context) {
let confVer = defaultVersion;
// .eslintrc shared settings (https://eslint.org/docs/user-guide/configuring#adding-shared-settings)
if (context.settings && context.settings.react && context.settings.react.version) {
let settingsVersion = context.settings.react.version;
if (settingsVersion === 'detect') {
settingsVersion = detectReactVersion(context);
}
if (typeof settingsVersion !== 'string') {
error('Warning: React version specified in eslint-plugin-react-settings must be a string; '
+ `got “${typeof settingsVersion}`);
}
confVer = String(settingsVersion);
} else if (!warnedForMissingVersion) {
error('Warning: React version not specified in eslint-plugin-react settings. '
+ 'See https://github.com/jsx-eslint/eslint-plugin-react#configuration .');
warnedForMissingVersion = true;
}
confVer = /^[0-9]+\.[0-9]+$/.test(confVer) ? `${confVer}.0` : confVer;
const result = semver.coerce(confVer.split('.').map((part) => Number(part)).join('.'));
if (!result) {
error(`Warning: React version specified in eslint-plugin-react-settings must be a valid semver version, or "detect"; got “${confVer}`);
}
return result ? result.version : defaultVersion;
}
// TODO, semver-major: remove context fallback
function detectFlowVersion(context) {
const basedir = resolveBasedir(context);
try {
const flowPackageJsonPath = resolve.sync('flow-bin/package.json', { basedir });
const flowPackageJson = require(flowPackageJsonPath); // eslint-disable-line global-require, import/no-dynamic-require
return flowPackageJson.version;
} catch (e) {
if (e.code === 'MODULE_NOT_FOUND') {
error('Warning: Flow version was set to "detect" in eslint-plugin-react settings, '
+ 'but the "flow-bin" package is not installed. Assuming latest Flow version for linting.');
return '999.999.999';
}
throw e;
}
}
function getFlowVersionFromContext(context) {
let confVer = defaultVersion;
// .eslintrc shared settings (https://eslint.org/docs/user-guide/configuring#adding-shared-settings)
if (context.settings.react && context.settings.react.flowVersion) {
let flowVersion = context.settings.react.flowVersion;
if (flowVersion === 'detect') {
flowVersion = detectFlowVersion(context);
}
if (typeof flowVersion !== 'string') {
error('Warning: Flow version specified in eslint-plugin-react-settings must be a string; '
+ `got “${typeof flowVersion}`);
}
confVer = String(flowVersion);
} else {
throw 'Could not retrieve flowVersion from settings'; // eslint-disable-line no-throw-literal
}
confVer = /^[0-9]+\.[0-9]+$/.test(confVer) ? `${confVer}.0` : confVer;
const result = semver.coerce(confVer.split('.').map((part) => Number(part)).join('.'));
if (!result) {
error(`Warning: Flow version specified in eslint-plugin-react-settings must be a valid semver version, or "detect"; got “${confVer}`);
}
return result ? result.version : defaultVersion;
}
function test(semverRange, confVer) {
return semver.satisfies(confVer, semverRange);
}
function testReactVersion(context, semverRange) {
return test(semverRange, getReactVersionFromContext(context));
}
function testFlowVersion(context, semverRange) {
return test(semverRange, getFlowVersionFromContext(context));
}
module.exports = {
testReactVersion,
testFlowVersion,
resetWarningFlag,
resetDetectedVersion,
};