next/dist/build/webpack/plugins/jsconfig-paths-plugin.js

The React Framework

"use strict";exports.__esModule=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;exports.JsConfigPathsPlugin=void 0;var _path=_interopRequireDefault(require("path"));var _debug=require("next/dist/compiled/debug");function _interopRequireDefault(obj){return obj&&obj.__esModule?obj:{default:obj};}/**
 * This webpack resolver is largely based on TypeScript's "paths" handling
 * The TypeScript license can be found here:
 * https://github.com/microsoft/TypeScript/blob/214df64e287804577afa1fea0184c18c40f7d1ca/LICENSE.txt
 */const log=(0,_debug.debug)('next:jsconfig-paths-plugin');const asterisk=0x2a;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;}/**
 * Determines whether a path starts with a relative path component (i.e. `.` or `..`).
 */function pathIsRelative(testPath){return /^\.\.?($|[\\/])/.test(testPath);}function tryParsePattern(pattern){// This should be verified outside of here and a proper error thrown.
const indexOfStar=pattern.indexOf('*');return indexOfStar===-1?undefined:{prefix:pattern.substr(0,indexOfStar),suffix:pattern.substr(indexOfStar+1)};}function isPatternMatch({prefix,suffix},candidate){return candidate.length>=prefix.length+suffix.length&&candidate.startsWith(prefix)&&candidate.endsWith(suffix);}/** Return the object corresponding to the best pattern to match `candidate`. */function findBestPatternMatch(values,getPattern,candidate){let matchedValue;// use length of prefix as betterness criteria
let longestMatchPrefixLength=-1;for(const v of values){const pattern=getPattern(v);if(isPatternMatch(pattern,candidate)&&pattern.prefix.length>longestMatchPrefixLength){longestMatchPrefixLength=pattern.prefix.length;matchedValue=v;}}return matchedValue;}/**
 * patternStrings contains both pattern strings (containing "*") and regular strings.
 * Return an exact match if possible, or a pattern match, or undefined.
 * (These are verified by verifyCompilerOptions to have 0 or 1 "*" characters.)
 */function matchPatternOrExact(patternStrings,candidate){const patterns=[];for(const patternString of patternStrings){if(!hasZeroOrOneAsteriskCharacter(patternString))continue;const pattern=tryParsePattern(patternString);if(pattern){patterns.push(pattern);}else if(patternString===candidate){// pattern was matched as is - no need to search further
return patternString;}}return findBestPatternMatch(patterns,_=>_,candidate);}/**
 * Tests whether a value is string
 */function isString(text){return typeof text==='string';}/**
 * Given that candidate matches pattern, returns the text matching the '*'.
 * E.g.: matchedText(tryParsePattern("foo*baz"), "foobarbaz") === "bar"
 */function matchedText(pattern,candidate){return candidate.substring(pattern.prefix.length,candidate.length-pattern.suffix.length);}function patternText({prefix,suffix}){return`${prefix}*${suffix}`;}const NODE_MODULES_REGEX=/node_modules/;/**
 * Handles tsconfig.json or jsconfig.js "paths" option for webpack
 * Largely based on how the TypeScript compiler handles it:
 * https://github.com/microsoft/TypeScript/blob/1a9c8197fffe3dace5f8dca6633d450a88cba66d/src/compiler/moduleNameResolver.ts#L1362
 */class JsConfigPathsPlugin{constructor(paths,resolvedBaseUrl){this.paths=void 0;this.resolvedBaseUrl=void 0;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').tapPromise('JsConfigPathsPlugin',async(request,resolveContext)=>{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;}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;}if(pathIsRelative(moduleName)){log('skipping request as it is a relative path %s',moduleName);return;}// 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;}const matchedStar=isString(matchedPattern)?undefined:matchedText(matchedPattern,moduleName);const matchedPatternText=isString(matchedPattern)?matchedPattern:patternText(matchedPattern);let triedPaths=[];for(const subst of paths[matchedPatternText]){const curPath=matchedStar?subst.replace('*',matchedStar):subst;// Ensure .d.ts is not matched
if(curPath.endsWith('.d.ts')){continue;}const candidate=_path.default.join(baseDirectory,curPath);const[err,result]=await new Promise(resolve=>{const obj=Object.assign({},request,{request:candidate});resolver.doResolve(target,obj,`Aliased with tsconfig.json or jsconfig.json ${matchedPatternText} to ${candidate}`,resolveContext,(resolverErr,resolverResult)=>{resolve([resolverErr,resolverResult]);});});// There's multiple paths values possible, so we first have to iterate them all first before throwing an error
if(err||result===undefined){triedPaths.push(candidate);continue;}return result;}});}}exports.JsConfigPathsPlugin=JsConfigPathsPlugin;
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