Do not support --watch inside non-version-controlled environments (#5060

)

* Do not support --watch inside non-version-controlled environments

* Update CHANGELOG.md

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ### Fixes
 
+* `[jest-cli]` Do not support `--watch` inside non-version-controlled environments
+ ([#5060](https://github.com/facebook/jest/pull/5060))
 * `[jest-config]` Escape Windows path separator in testPathPattern CLI arguments
  ([#5054](https://github.com/facebook/jest/pull/5054)
 * `[jest-jasmine]` Register sourcemaps as node environment to improve performance with jsdom ([#5045](https://github.com/facebook/jest/pull/5045))

packages/jest-cli/src/run_jest.js

@@ -38,20 +38,16 @@ const getTestPaths = async (
  changedFilesPromise,
 ) => {
  const source = new SearchSource(context);
- let data = await source.getTestPaths(globalConfig, changedFilesPromise);
+ const data = await source.getTestPaths(globalConfig, changedFilesPromise);
 
  if (!data.tests.length && globalConfig.onlyChanged && data.noSCM) {
- if (globalConfig.watch) {
- data = await source.getTestPaths(globalConfig);
- } else {
- new Console(outputStream, outputStream).log(
- 'Jest can only find uncommitted changed files in a git or hg ' +
- 'repository. If you make your project a git or hg ' +
- 'repository (`git init` or `hg init`), Jest will be able ' +
- 'to only run tests related to files changed since the last ' +
- 'commit.',
- );
- }
+ new Console(outputStream, outputStream).log(
+ 'Jest can only find uncommitted changed files in a git or hg ' +
+ 'repository. If you make your project a git or hg ' +
+ 'repository (`git init` or `hg init`), Jest will be able ' +
+ 'to only run tests related to files changed since the last ' +
+ 'commit.',
+ );
  }
  return data;
 };