fix: also use .prettierignore from current working directory (#14) (#58)

This pull request tries to fix #14 with a zero config approach.

If the `process.cwd()` is not the same as the git root it will also try to load the .prettierignore file from there.

Author: jantimon

README.md

@@ -108,4 +108,4 @@ For example `pretty-quick --since HEAD` will format only staged files.
 
 ## 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 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, 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.

src/__tests__/scm-git.test.js

@@ -11,13 +11,18 @@ afterEach(() => {
   jest.clearAllMocks();
 });
 
-const mockGitFs = (additionalUnstaged = '') => {
-  mock({
-    '/.git': {},
-    '/raz.js': 'raz()',
-    '/foo.js': 'foo()',
-    '/bar.md': '# foo',
-  });
+const mockGitFs = (additionalUnstaged = '', additionalFiles = {}) => {
+  mock(
+    Object.assign(
+      {
+        '/.git': {},
+        '/raz.js': 'raz()',
+        '/foo.js': 'foo()',
+        '/bar.md': '# foo',
+      },
+      additionalFiles
+    )
+  );
   execa.sync.mockImplementation((command, args) => {
     if (command !== 'git') {
       throw new Error(`unexpected command: ${command}`);
@@ -241,4 +246,22 @@ describe('with git', () => {
     expect(onExamineFile).not.toHaveBeenCalledWith('./foo.js');
     expect(onExamineFile).not.toHaveBeenCalledWith('./bar.md');
   });
+
+  test('ignore files matching patterns from the repositories root .prettierignore', () => {
+    const onWriteFile = jest.fn();
+    mockGitFs('', {
+      '/.prettierignore': '*.md',
+    });
+    prettyQuick('/sub-directory/', { since: 'banana', onWriteFile });
+    expect(onWriteFile.mock.calls).toEqual([['./foo.js']]);
+  });
+
+  test('ignore files matching patterns from the working directories .prettierignore', () => {
+    const onWriteFile = jest.fn();
+    mockGitFs('', {
+      '/sub-directory/.prettierignore': '*.md',
+    });
+    prettyQuick('/sub-directory/', { since: 'banana', onWriteFile });
+    expect(onWriteFile.mock.calls).toEqual([['./foo.js']]);
+  });
 });

src/__tests__/scm-hg.test.js

@@ -11,12 +11,17 @@ afterEach(() => {
   jest.clearAllMocks();
 });
 
-const mockHgFs = () => {
-  mock({
-    '/.hg': {},
-    '/foo.js': 'foo()',
-    '/bar.md': '# foo',
-  });
+const mockHgFs = (additionalFiles = {}) => {
+  mock(
+    Object.assign(
+      {
+        '/.hg': {},
+        '/foo.js': 'foo()',
+        '/bar.md': '# foo',
+      },
+      additionalFiles
+    )
+  );
   execa.sync.mockImplementation((command, args) => {
     if (command !== 'hg') {
       throw new Error(`unexpected command: ${command}`);
@@ -152,4 +157,22 @@ describe('with hg', () => {
     expect(onExamineFile).not.toHaveBeenCalledWith('./foo.js');
     expect(onExamineFile).not.toHaveBeenCalledWith('./bar.md');
   });
+
+  test('ignore files matching patterns from the repositories root .prettierignore', () => {
+    const onWriteFile = jest.fn();
+    mockHgFs({
+      '/.prettierignore': '*.md',
+    });
+    prettyQuick('/sub-directory/', { since: 'banana', onWriteFile });
+    expect(onWriteFile.mock.calls).toEqual([['./foo.js']]);
+  });
+
+  test('ignore files matching patterns from the working directories .prettierignore', () => {
+    const onWriteFile = jest.fn();
+    mockHgFs({
+      '/sub-directory/.prettierignore': '*.md',
+    });
+    prettyQuick('/sub-directory/', { since: 'banana', onWriteFile });
+    expect(onWriteFile.mock.calls).toEqual([['./foo.js']]);
+  });
 });

src/index.js

@@ -29,16 +29,24 @@ export default (
 
   onFoundSinceRevision && onFoundSinceRevision(scm.name, revision);
 
+  const rootIgnorer = createIgnorer(directory);
+  const cwdIgnorer =
+    currentDirectory !== directory
+      ? createIgnorer(currentDirectory)
+      : () => true;
+
   const changedFiles = scm
     .getChangedFiles(directory, revision, staged)
     .filter(isSupportedExtension)
-    .filter(createIgnorer(directory));
+    .filter(rootIgnorer)
+    .filter(cwdIgnorer);
 
   const unstagedFiles = staged
     ? scm
         .getUnstagedChangedFiles(directory, revision)
         .filter(isSupportedExtension)
-        .filter(createIgnorer(directory))
+        .filter(rootIgnorer)
+        .filter(cwdIgnorer)
     : [];
 
   const wasFullyStaged = f => unstagedFiles.indexOf(f) < 0;