feat: add an --ignore-path flag (#115)

* feat(ignore-path): define new flag for ignore files

* refactor: addressing comments

* test: adding --ignore-path cases

* test: adding scm-hg tests

Author: roggervalf

README.md

@@ -142,6 +142,11 @@ For example `pretty-quick --since HEAD` will format only staged files.
 
 -->
 
+### `--ignore-path`
+
+Check an alternative file for ignoring files with the same format as [`.prettierignore`](https://prettier.io/docs/en/ignore#ignoring-files).
+For example `pretty-quick --ignore-path=.gitignore`
+
 ## Configuration and Ignore Files
 
-`pretty-quick` will respect your [`.prettierrc`](https://prettier.io/docs/en/configuration), [`.prettierignore`](https://prettier.io/docs/en/ignore#ignoring-files), and [`.editorconfig`](http://editorconfig.org/) files, so there's no additional setup required. Configuration files will be found by searching up the file system. `.prettierignore` files are only found from the repository root and the working directory that the command was executed from.
+`pretty-quick` will respect your [`.prettierrc`](https://prettier.io/docs/en/configuration), [`.prettierignore`](https://prettier.io/docs/en/ignore#ignoring-files), and [`.editorconfig`](http://editorconfig.org/) files if you don't use `--ignore-path` . Configuration files will be found by searching up the file system. `.prettierignore` files are only found from the repository root and the working directory that the command was executed from.

bin/pretty-quick.js

@@ -10,6 +10,7 @@ const prettyQuick = require('..').default;
 const args = mri(process.argv.slice(2), {
   alias: {
     'resolve-config': 'resolveConfig',
+    'ignore-path': 'ignorePath',
   },
 });
 

src/__tests__/scm-git.test.js

@@ -332,4 +332,30 @@ describe('with git', () => {
     prettyQuick('/sub-directory/', { since: 'banana', onWriteFile });
     expect(onWriteFile.mock.calls).toEqual([['./foo.js']]);
   });
+
+  test('with --ignore-path to ignore files matching patterns from the repositories root .ignorePath', () => {
+    const onWriteFile = jest.fn();
+    mockGitFs('', {
+      '/.ignorePath': '*.md',
+    });
+    prettyQuick('/sub-directory/', {
+      since: 'banana',
+      onWriteFile,
+      ignorePath: '/.ignorePath',
+    });
+    expect(onWriteFile.mock.calls).toEqual([['./foo.js']]);
+  });
+
+  test('with --ignore-path to ignore files matching patterns from the working directories .ignorePath', () => {
+    const onWriteFile = jest.fn();
+    mockGitFs('', {
+      '/sub-directory/.ignorePath': '*.md',
+    });
+    prettyQuick('/sub-directory/', {
+      since: 'banana',
+      onWriteFile,
+      ignorePath: '/.ignorePath',
+    });
+    expect(onWriteFile.mock.calls).toEqual([['./foo.js']]);
+  });
 });

src/__tests__/scm-hg.test.js

@@ -231,4 +231,30 @@ describe('with hg', () => {
     prettyQuick('/sub-directory/', { since: 'banana', onWriteFile });
     expect(onWriteFile.mock.calls).toEqual([['./foo.js']]);
   });
+
+  test('with --ignore-path to ignore files matching patterns from the repositories root .ignorePath', () => {
+    const onWriteFile = jest.fn();
+    mockHgFs({
+      '/.ignorePath': '*.md',
+    });
+    prettyQuick('/sub-directory/', {
+      since: 'banana',
+      onWriteFile,
+      ignorePath: '/.ignorePath',
+    });
+    expect(onWriteFile.mock.calls).toEqual([['./foo.js']]);
+  });
+
+  test('with --ignore-path to ignore files matching patterns from the working directories .ignorePath', () => {
+    const onWriteFile = jest.fn();
+    mockHgFs({
+      '/.ignorePath': '*.md',
+    });
+    prettyQuick('/sub-directory/', {
+      since: 'banana',
+      onWriteFile,
+      ignorePath: '/.ignorePath',
+    });
+    expect(onWriteFile.mock.calls).toEqual([['./foo.js']]);
+  });
 });

src/index.js

@@ -15,6 +15,7 @@ export default (
     branch,
     bail,
     check,
+    ignorePath,
     verbose,
     onFoundSinceRevision,
     onFoundChangedFiles,
@@ -35,10 +36,10 @@ export default (
 
   onFoundSinceRevision && onFoundSinceRevision(scm.name, revision);
 
-  const rootIgnorer = createIgnorer(directory);
+  const rootIgnorer = createIgnorer(directory, ignorePath);
   const cwdIgnorer =
     currentDirectory !== directory
-      ? createIgnorer(currentDirectory)
+      ? createIgnorer(currentDirectory, ignorePath)
       : () => true;
 
   const changedFiles = scm