Change method of obtaining git root (#8052)

CHANGELOG.md

@@ -6,20 +6,21 @@
 
 ### Fixes
 
+- `[jest-changed-files]` Change method of obtaining git root ([#8052](https://github.com/facebook/jest/pull/8052))
 - `[jest-each]` Fix test function type ([#8145](https://github.com/facebook/jest/pull/8145))
-- `[pretty-format]` Print `BigInt` as a readable number instead of `{}` ([#8138](https://github.com/facebook/jest/pull/8138))
 - `[jest-fake-timers]` `getTimerCount` not taking immediates and ticks into account ([#8139](https://github.com/facebook/jest/pull/8139))
 - `[jest-worker]` Move from `process.exit` to `exit` ([#7327](https://github.com/facebook/jest/pull/7327))
+- `[pretty-format]` Print `BigInt` as a readable number instead of `{}` ([#8138](https://github.com/facebook/jest/pull/8138))
 
 ### Chore & Maintenance
 
 - `[*]` Remove flow from code base ([#8061](https://github.com/facebook/jest/pull/8061))
 - `[*]` Use property initializer syntax in Jest codebase ([#8117](https://github.com/facebook/jest/pull/8117))
-- `[docs]` Improve description of optional arguments in ExpectAPI.md ([#8126](https://github.com/facebook/jest/pull/8126)
 - `[*]` Move @types/node to the root package.json [#8129](https://github.com/facebook/jest/pull/8129))
 - `[*]` Add documentation and tests related to auto-mocking ([#8099](https://github.com/facebook/jest/pull/8099))
 - `[*]` Add `jest-watch-typeahead` as a devDependency ([#6449](https://github.com/facebook/jest/pull/6449))
 - `[*]` upgrade TS to 3.4.0-dev\* for inceremental builds ([#8149](https://github.com/facebook/jest/pull/8149))
+- `[docs]` Improve description of optional arguments in ExpectAPI.md ([#8126](https://github.com/facebook/jest/pull/8126)
 
 ### Performance
 

e2e/__tests__/jestChangedFiles.test.ts

@@ -54,8 +54,8 @@ test('gets hg SCM roots and dedups them', async () => {
   // NOTE: This test can break if you have a .hg repo initialized inside your
   // os tmp directory.
   expect(hgRepos).toHaveLength(2);
-  expect(hgRepos[0]).toMatch(/\/jest-changed-files-test-dir\/first-repo$/);
-  expect(hgRepos[1]).toMatch(/\/jest-changed-files-test-dir\/second-repo$/);
+  expect(hgRepos[0]).toMatch(/\/jest-changed-files-test-dir\/first-repo\/?$/);
+  expect(hgRepos[1]).toMatch(/\/jest-changed-files-test-dir\/second-repo\/?$/);
 });
 
 test('gets git SCM roots and dedups them', async () => {
@@ -88,8 +88,8 @@ test('gets git SCM roots and dedups them', async () => {
   // NOTE: This test can break if you have a .git repo initialized inside your
   // os tmp directory.
   expect(gitRepos).toHaveLength(2);
-  expect(gitRepos[0]).toMatch(/\/jest-changed-files-test-dir\/first-repo$/);
-  expect(gitRepos[1]).toMatch(/\/jest-changed-files-test-dir\/second-repo$/);
+  expect(gitRepos[0]).toMatch(/\/jest-changed-files-test-dir\/first-repo\/?$/);
+  expect(gitRepos[1]).toMatch(/\/jest-changed-files-test-dir\/second-repo\/?$/);
 });
 
 test('gets mixed git and hg SCM roots and dedups them', async () => {
@@ -121,8 +121,8 @@ test('gets mixed git and hg SCM roots and dedups them', async () => {
   // inside your os tmp directory.
   expect(gitRepos).toHaveLength(1);
   expect(hgRepos).toHaveLength(1);
-  expect(gitRepos[0]).toMatch(/\/jest-changed-files-test-dir\/first-repo$/);
-  expect(hgRepos[0]).toMatch(/\/jest-changed-files-test-dir\/second-repo$/);
+  expect(gitRepos[0]).toMatch(/\/jest-changed-files-test-dir\/first-repo\/?$/);
+  expect(hgRepos[0]).toMatch(/\/jest-changed-files-test-dir\/second-repo\/?$/);
 });
 
 test('gets changed files for git', async () => {

packages/jest-changed-files/src/git.ts

@@ -29,8 +29,10 @@ const adapter: SCMAdapter = {
     const changedSince: string | undefined =
       options && (options.withAncestor ? 'HEAD^' : options.changedSince);
 
-    const includePaths: Array<Config.Path> =
-      (options && options.includePaths) || [];
+    const includePaths: Array<Config.Path> = (
+      (options && options.includePaths) ||
+      []
+    ).map(absoluteRoot => path.normalize(path.relative(cwd, absoluteRoot)));
 
     if (options && options.lastCommit) {
       return findChangedFilesUsingCommand(
@@ -72,12 +74,12 @@ const adapter: SCMAdapter = {
   },
 
   getRoot: async cwd => {
-    const options = ['rev-parse', '--show-toplevel'];
+    const options = ['rev-parse', '--show-cdup'];
 
     try {
       const result = await execa('git', options, {cwd});
 
-      return result.stdout;
+      return path.resolve(cwd, result.stdout);
     } catch (e) {
       return null;
     }