Revert #621 changes (#627)

README.md

@@ -250,8 +250,6 @@ You may provide
 * a relative path to the configuration file. It will be resolved relative to the respective `.ts` entry file.
 * an absolute path to the configuration file.
 
-Note that TypeScript only accepts source files inside the project root. By default, the project root will be the folder that holds your config file. You can modify it by setting the [`rootDir`](https://www.typescriptlang.org/docs/handbook/compiler-options.html) TypeScript option in your configuration.
-
 #### visualStudioErrorFormat *(boolean) (default=false)*
 
 If `true`, the TypeScript compiler output for an error or a warning, e.g. `(3,14): error TS4711: you did something very wrong`, in file `myFile` will instead be `myFile(3,14): error TS4711: you did something very wrong` (notice the file name at the beginning). This way Visual Studio will interpret this line and show any errors or warnings in the *error list*. This enables navigation to the file/line/column through double click.

src/config.ts

@@ -121,40 +121,19 @@ export function getConfigParseResult(
     configFile: ConfigFile,
     configFilePath: string
 ) {
-    let basePath: string
-    const configDir = path.dirname(configFilePath || '')
-
-    // check for `compilerOptions.rootDir`
-    if (configFile.config.compilerOptions && typeof configFile.config.compilerOptions.rootDir === 'string') {
-        const configuredRootDir = configFile.config.compilerOptions.rootDir
-
-        // `rootDir` is absolute -> use it as `basePath`
-        if (path.isAbsolute(configuredRootDir)) {
-            basePath = configuredRootDir
-
-        // `rootDir` is relative -> resolve it relative to config dir
-        } else {
-            basePath = path.resolve(configDir, configuredRootDir)
-        }
-
-    // no `rootDir` -> use config directory as `basePath`
-    } else {
-        basePath = configDir
-    }
-
     let configParseResult: typescript.ParsedCommandLine;
     if (typeof (<any> compiler).parseJsonConfigFileContent === 'function') {
         // parseConfigFile was renamed between 1.6.2 and 1.7
         configParseResult = (/*<TSCompatibleCompiler>*/ <any> compiler).parseJsonConfigFileContent(
             configFile.config,
             compiler.sys,
-            basePath
+            path.dirname(configFilePath || '')
         );
     } else {
         configParseResult = (/*<TSCompatibleCompiler>*/ <any> compiler).parseConfigFile(
             configFile.config,
             compiler.sys,
-            basePath
+            path.dirname(configFilePath || '')
         );
     }