feat: throw error in runAll if outside git directory

README.md

@@ -25,7 +25,7 @@ The fastest way to start using lint-staged is to run following command in your t
 
 ```bash
 npx mrm lint-staged
-``` 
+```
 
 It will install and configure [husky](https://github.com/typicode/husky) and lint-staged depending on code quality tools from `package.json` dependencies so please make sure you install (`npm install --save-dev`) and configure all code quality tools like [Prettier](https://prettier.io), [ESlint](https://eslint.org) prior that.
 
@@ -346,6 +346,7 @@ When using the IDE's GUI to commit changes with the `precommit` hook, you might
 Until the issue is resolved in the IDE, you can use the following config to work around it:
 
 husky v1.x
+
 ```json
 {
   "husky": {
@@ -358,16 +359,16 @@ husky v1.x
 ```
 
 husky v0.x
+
 ```json
 {
   "scripts": {
-     "precommit": "lint-staged",
-     "postcommit": "git update-index --again"
+    "precommit": "lint-staged",
+    "postcommit": "git update-index --again"
   }
 }
 ```
 
-
 _Thanks to [this comment](https://youtrack.jetbrains.com/issue/IDEA-135454#comment=27-2710654) for the fix!_
 
 ### How to use `lint-staged` in a multi package monorepo?

src/runAll.js

@@ -24,7 +24,12 @@ module.exports = async function runAll(config) {
   }
 
   const { concurrent, renderer, chunkSize, subTaskConcurrency } = config
-  const gitDir = await resolveGitDir()
+  const gitDir = await resolveGitDir(config)
+
+  if (!gitDir) {
+    throw new Error('Current directory is not a git directory!')
+  }
+
   debug('Resolved git directory to be `%s`', gitDir)
 
   sgf.cwd = gitDir