Fix: prettierPath not working via config file (jestjs#7412)

* removed default value of prettierPath from argv

* updated snapshot for show_config

* updated changelog

* fixed wrong package name in changelog

CHANGELOG.md

@@ -75,6 +75,7 @@
 - `[jest-haste-map]` [**BREAKING**] Recover files correctly after haste name collisions are fixed ([#7329](https://github.com/facebook/jest/pull/7329))
 - `[jest-haste-map]` Remove legacy condition for duplicate module detection ([#7333](https://github.com/facebook/jest/pull/7333))
 - `[jest-haste-map]` Fix `require` detection with trailing commas and ignore `import typeof` modules ([#7385](https://github.com/facebook/jest/pull/7385))
+- `[jest-cli]` Fix to set prettierPath via config file ([#7412](https://github.com/facebook/jest/pull/7412))
 
 ### Chore & Maintenance
 

e2e/__tests__/__snapshots__/show_config.test.js.snap

@@ -36,7 +36,7 @@ exports[`--showConfig outputs config info and exits 1`] = `
       \\"moduleNameMapper\\": {},
       \\"modulePathIgnorePatterns\\": [],
       \\"name\\": \\"[md5 hash]\\",
-      \\"prettierPath\\": null,
+      \\"prettierPath\\": \\"prettier\\",
       \\"resetMocks\\": false,
       \\"resetModules\\": false,
       \\"resolver\\": null,

packages/jest-cli/src/cli/args.js

@@ -425,7 +425,7 @@ export const options = {
     type: 'string',
   },
   prettierPath: {
-    default: 'prettier',
+    default: undefined,
     description: 'The path to the "prettier" module used for inline snapshots.',
     type: 'string',
   },

types/Argv.js

@@ -62,6 +62,7 @@ export type Argv = {|
   outputFile: string,
   preset: ?string,
   projects: Array<string>,
+  prettierPath: ?string,
   replname: ?string,
   resetMocks: boolean,
   resetModules: boolean,