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deejayy/CustomModuleLoader.ts

Last active September 21, 2022 20:26
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Revisions

  1. deejayy revised this gist Sep 13, 2018. No changes.
  2. deejayy created this gist Sep 13, 2018.
    25 changes: 25 additions & 0 deletions CustomModuleLoader.ts
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,25 @@
    import customModuleLoader = require('module');

    export class CustomModuleLoader {
    public cOptions: any = require('../tsconfig.json').compilerOptions;

    public replacePaths: any = {};

    constructor() {
    Object.keys(this.cOptions.paths).forEach(alias => {
    this.replacePaths[alias.replace(/\*.?/, '(.*)')] = this.cOptions.paths[alias][0].replace(/\*.?/, '$1');
    });

    (<any>customModuleLoader)._originalResolveFilename = (<any>customModuleLoader)._resolveFilename;

    (<any>customModuleLoader)._resolveFilename = (request: string, parent: customModuleLoader, isMain: boolean) => {
    Object.keys(this.replacePaths).forEach(matchString => {
    let regex = new RegExp(matchString);
    if (request.match(regex)) {
    request = [process.cwd(), this.cOptions.outDir, request.replace(regex, this.replacePaths[matchString])].join('/');
    }
    })
    return (<any>customModuleLoader)._originalResolveFilename(request, parent, isMain);
    }
    }
    };