fix: allow absolute baseUrl in tsconfig.json (#174)

* Add test case

* Allow absolute baseUrl in tsconfig.json

* Apply suggestions from code review

* Add changelog entry

CHANGELOG.md

@@ -16,6 +16,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Add `cwd` option to `register` function that overrides where the `tsconfig.json` search begins. See PR [#205](https://github.com/dividab/tsconfig-paths/pull/205).
 - Add support for `jsconfig.json`. See PR [#199](https://github.com/dividab/tsconfig-paths/pull/199). Thanks to [@F3n67u](https://github.com/F3n67u) for this PR!
 - Let `paths` mappings be absolute paths. See PR [#184](https://github.com/dividab/tsconfig-paths/pull/184).
+- Allow `baseUrl` in `tsconfig.json` to be an absolute path. See PR [#174](https://github.com/dividab/tsconfig-paths/pull/174). Thanks to [@nwalters512](https://github.com/nwalters512) for this PR!
 
 ### Fixed
 

src/__tests__/config-loader.test.ts

@@ -97,4 +97,20 @@ describe("config-loader", (): void => {
     expect(successResult.resultType).toBe("success");
     expect(successResult.configFileAbsolutePath).toBe(configFile);
   });
+
+  it("should allow an absolute baseUrl in tsconfig.json", () => {
+    const result = configLoader({
+      explicitParams: undefined,
+      cwd: "/baz",
+      // tslint:disable-next-line:no-any
+      tsConfigLoader: (_: any) => ({
+        tsConfigPath: "/baz/tsconfig.json",
+        baseUrl: "/baz",
+        paths: {},
+      }),
+    });
+
+    const successResult = result as ConfigLoaderSuccessResult;
+    assert.equal(successResult.absoluteBaseUrl, "/baz");
+  });
 });

src/config-loader.ts

@@ -79,7 +79,7 @@ export function configLoader({
     resultType: "success",
     configFileAbsolutePath: loadResult.tsConfigPath,
     baseUrl: loadResult.baseUrl,
-    absoluteBaseUrl: path.join(
+    absoluteBaseUrl: path.resolve(
       path.dirname(loadResult.tsConfigPath),
       loadResult.baseUrl || ""
     ),