next
Version:
The React Framework
175 lines (174 loc) • 7.09 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.hasZeroOrOneAsteriskCharacter = hasZeroOrOneAsteriskCharacter;
exports.pathIsRelative = pathIsRelative;
exports.tryParsePattern = tryParsePattern;
exports.findBestPatternMatch = findBestPatternMatch;
exports.matchPatternOrExact = matchPatternOrExact;
exports.isString = isString;
exports.matchedText = matchedText;
exports.patternText = patternText;
var _path = _interopRequireDefault(require("path"));
var _debug = require("next/dist/compiled/debug");
function _interopRequireDefault(obj) {
return obj && obj.__esModule ? obj : {
default: obj
};
}
const log = (0, _debug).debug('next:jsconfig-paths-plugin');
const asterisk = 42;
function hasZeroOrOneAsteriskCharacter(str) {
let seenAsterisk = false;
for(let i = 0; i < str.length; i++){
if (str.charCodeAt(i) === asterisk) {
if (!seenAsterisk) {
seenAsterisk = true;
} else {
// have already seen asterisk
return false;
}
}
}
return true;
}
function pathIsRelative(testPath) {
return /^\.\.?($|[\\/])/.test(testPath);
}
function tryParsePattern(pattern) {
// This should be verified outside of here and a proper error thrown.
const indexOfStar = pattern.indexOf('*');
return indexOfStar === -1 ? undefined : {
prefix: pattern.slice(0, indexOfStar),
suffix: pattern.slice(indexOfStar + 1)
};
}
function isPatternMatch({ prefix , suffix }, candidate) {
return candidate.length >= prefix.length + suffix.length && candidate.startsWith(prefix) && candidate.endsWith(suffix);
}
function findBestPatternMatch(values, getPattern, candidate) {
let matchedValue;
// use length of prefix as betterness criteria
let longestMatchPrefixLength = -1;
for (const v of values){
const pattern = getPattern(v);
if (isPatternMatch(pattern, candidate) && pattern.prefix.length > longestMatchPrefixLength) {
longestMatchPrefixLength = pattern.prefix.length;
matchedValue = v;
}
}
return matchedValue;
}
function matchPatternOrExact(patternStrings, candidate) {
const patterns = [];
for (const patternString of patternStrings){
if (!hasZeroOrOneAsteriskCharacter(patternString)) continue;
const pattern = tryParsePattern(patternString);
if (pattern) {
patterns.push(pattern);
} else if (patternString === candidate) {
// pattern was matched as is - no need to search further
return patternString;
}
}
return findBestPatternMatch(patterns, (_)=>_
, candidate);
}
function isString(text) {
return typeof text === 'string';
}
function matchedText(pattern, candidate) {
return candidate.substring(pattern.prefix.length, candidate.length - pattern.suffix.length);
}
function patternText({ prefix , suffix }) {
return `${prefix}*${suffix}`;
}
/**
* Calls the iterator function for each entry of the array
* until the first result or error is reached
*/ function forEachBail(array, iterator, callback) {
if (array.length === 0) return callback();
let i = 0;
const next = ()=>{
let loop = undefined;
iterator(array[i++], (err, result)=>{
if (err || result !== undefined || i >= array.length) {
return callback(err, result);
}
if (loop === false) while(next());
loop = true;
});
if (!loop) loop = false;
return loop;
};
while(next());
}
const NODE_MODULES_REGEX = /node_modules/;
class JsConfigPathsPlugin {
constructor(paths, resolvedBaseUrl){
this.paths = paths;
this.resolvedBaseUrl = resolvedBaseUrl;
log('tsconfig.json or jsconfig.json paths: %O', paths);
log('resolved baseUrl: %s', resolvedBaseUrl);
}
apply(resolver) {
const paths = this.paths;
const pathsKeys = Object.keys(paths);
// If no aliases are added bail out
if (pathsKeys.length === 0) {
log('paths are empty, bailing out');
return;
}
const baseDirectory = this.resolvedBaseUrl;
const target = resolver.ensureHook('resolve');
resolver.getHook('described-resolve').tapAsync('JsConfigPathsPlugin', (request, resolveContext, callback)=>{
const moduleName = request.request;
// Exclude node_modules from paths support (speeds up resolving)
if (request.path.match(NODE_MODULES_REGEX)) {
log('skipping request as it is inside node_modules %s', moduleName);
return callback();
}
if (_path.default.posix.isAbsolute(moduleName) || process.platform === 'win32' && _path.default.win32.isAbsolute(moduleName)) {
log('skipping request as it is an absolute path %s', moduleName);
return callback();
}
if (pathIsRelative(moduleName)) {
log('skipping request as it is a relative path %s', moduleName);
return callback();
}
// log('starting to resolve request %s', moduleName)
// If the module name does not match any of the patterns in `paths` we hand off resolving to webpack
const matchedPattern = matchPatternOrExact(pathsKeys, moduleName);
if (!matchedPattern) {
log('moduleName did not match any paths pattern %s', moduleName);
return callback();
}
const matchedStar = isString(matchedPattern) ? undefined : matchedText(matchedPattern, moduleName);
const matchedPatternText = isString(matchedPattern) ? matchedPattern : patternText(matchedPattern);
let triedPaths = [];
forEachBail(paths[matchedPatternText], (subst, pathCallback)=>{
const curPath = matchedStar ? subst.replace('*', matchedStar) : subst;
// Ensure .d.ts is not matched
if (curPath.endsWith('.d.ts')) {
// try next path candidate
return pathCallback();
}
const candidate = _path.default.join(baseDirectory, curPath);
const obj = Object.assign({}, request, {
request: candidate
});
resolver.doResolve(target, obj, `Aliased with tsconfig.json or jsconfig.json ${matchedPatternText} to ${candidate}`, resolveContext, (resolverErr, resolverResult)=>{
if (resolverErr || resolverResult === undefined) {
triedPaths.push(candidate);
// try next path candidate
return pathCallback();
}
return pathCallback(resolverErr, resolverResult);
});
}, callback);
});
}
}
exports.JsConfigPathsPlugin = JsConfigPathsPlugin;
//# sourceMappingURL=jsconfig-paths-plugin.js.map