fix(content-docs): suppress git error on multiple occurrences

.eslintrc.js

@@ -202,7 +202,13 @@ module.exports = {
     'import/no-unresolved': [
       ERROR,
       {
-        ignore: ['^@theme', '^@docusaurus', '^@generated', '^@site'],
+        ignore: [
+          '^@theme',
+          '^@docusaurus',
+          '^@generated',
+          '^@site',
+          '^@testing-utils',
+        ],
       },
     ],
     'import/order': OFF,

jest.config.mjs

@@ -60,6 +60,8 @@ export default {
     // Using src instead of lib, so we always get fresh source
     '@docusaurus/plugin-content-docs/client':
       '@docusaurus/plugin-content-docs/src/client/index.ts',
+
+    '@testing-utils/(.*)': '<rootDir>/jest/utils/$1.ts',
   },
   snapshotSerializers: [
     '<rootDir>/jest/snapshotPathNormalizer.ts',

jest/utils/git.ts

@@ -0,0 +1,63 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import fs from 'fs-extra';
+import os from 'os';
+import path from 'path';
+import shell from 'shelljs';
+
+class Git {
+  constructor(private dir: string) {
+    const res = shell.exec('git init', {cwd: dir, silent: true});
+    if (res.code !== 0) {
+      throw new Error(`git init exited with code ${res.code}.
+stderr: ${res.stderr}
+stdout: ${res.stdout}`);
+    }
+    // Doesn't matter currently
+    shell.exec('git config user.email "test@jc-verse.com"', {
+      cwd: dir,
+      silent: true,
+    });
+    shell.exec('git config user.name "Test"', {cwd: dir, silent: true});
+
+    shell.exec('git commit --allow-empty -m "First commit"', {
+      cwd: dir,
+      silent: true,
+    });
+  }
+  commit(msg: string, date: string, author: string): void {
+    const addRes = shell.exec('git add .', {cwd: this.dir, silent: true});
+    const commitRes = shell.exec(
+      `git commit -m "${msg}" --date "${date}T00:00:00Z" --author "${author}"`,
+      {
+        cwd: this.dir,
+        env: {GIT_COMMITTER_DATE: `${date}T00:00:00Z`},
+        silent: true,
+      },
+    );
+    if (addRes.code !== 0) {
+      throw new Error(`git add exited with code ${addRes.code}.
+stderr: ${addRes.stderr}
+stdout: ${addRes.stdout}`);
+    }
+    if (commitRes.code !== 0) {
+      throw new Error(`git commit exited with code ${commitRes.code}.
+stderr: ${commitRes.stderr}
+stdout: ${commitRes.stdout}`);
+    }
+  }
+}
+
+// This function is sync so the same mock repo can be shared across tests
+export function createTempRepo(): {repoDir: string; git: Git} {
+  const repoDir = fs.mkdtempSync(path.join(os.tmpdir(), 'git-test-repo'));
+
+  const git = new Git(repoDir);
+
+  return {repoDir, git};
+}

packages/docusaurus-plugin-content-docs/src/__tests__/lastUpdate.test.ts

@@ -5,6 +5,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+import {createTempRepo} from '@testing-utils/git';
 import {jest} from '@jest/globals';
 import fs from 'fs-extra';
 import path from 'path';
@@ -69,7 +70,8 @@ describe('getFileLastUpdate', () => {
     const consoleMock = jest
       .spyOn(console, 'warn')
       .mockImplementation(() => {});
-    const tempFilePath = path.join(__dirname, '__fixtures__', '.temp');
+    const {repoDir} = createTempRepo();
+    const tempFilePath = path.join(repoDir, 'file.md');
     await fs.writeFile(tempFilePath, 'Lorem ipsum :)');
     await expect(getFileLastUpdate(tempFilePath)).resolves.toBeNull();
     expect(consoleMock).toHaveBeenCalledTimes(1);
@@ -79,6 +81,25 @@ describe('getFileLastUpdate', () => {
     await fs.unlink(tempFilePath);
   });
 
+  it('multiple files not tracked by git', async () => {
+    const consoleMock = jest
+      .spyOn(console, 'warn')
+      .mockImplementation(() => {});
+    const {repoDir} = createTempRepo();
+    const tempFilePath1 = path.join(repoDir, 'file1.md');
+    const tempFilePath2 = path.join(repoDir, 'file2.md');
+    await fs.writeFile(tempFilePath1, 'Lorem ipsum :)');
+    await fs.writeFile(tempFilePath2, 'Lorem ipsum :)');
+    await expect(getFileLastUpdate(tempFilePath1)).resolves.toBeNull();
+    await expect(getFileLastUpdate(tempFilePath2)).resolves.toBeNull();
+    expect(consoleMock).toHaveBeenCalledTimes(1);
+    expect(consoleMock).toHaveBeenLastCalledWith(
+      expect.stringMatching(/not tracked by git./),
+    );
+    await fs.unlink(tempFilePath1);
+    await fs.unlink(tempFilePath2);
+  });
+
   it('git does not exist', async () => {
     const mock = jest.spyOn(shell, 'which').mockImplementationOnce(() => null);
     const consoleMock = jest

packages/docusaurus-plugin-content-docs/src/lastUpdate.ts

@@ -31,17 +31,18 @@ export async function getFileLastUpdate(
     });
     return {timestamp: result.timestamp, author: result.author};
   } catch (err) {
-    if (err instanceof GitNotFoundError && !showedGitRequirementError) {
-      logger.warn('Sorry, the docs plugin last update options require Git.');
-      showedGitRequirementError = true;
-    } else if (
-      err instanceof FileNotTrackedError &&
-      !showedFileNotTrackedError
-    ) {
-      logger.warn(
-        'Cannot infer the update date for some files, as they are not tracked by git.',
-      );
-      showedFileNotTrackedError = true;
+    if (err instanceof GitNotFoundError) {
+      if (!showedGitRequirementError) {
+        logger.warn('Sorry, the docs plugin last update options require Git.');
+        showedGitRequirementError = true;
+      }
+    } else if (err instanceof FileNotTrackedError) {
+      if (!showedFileNotTrackedError) {
+        logger.warn(
+          'Cannot infer the update date for some files, as they are not tracked by git.',
+        );
+        showedFileNotTrackedError = true;
+      }
     } else {
       logger.warn(err);
     }

packages/docusaurus-utils/src/__tests__/gitUtils.test.ts

@@ -8,51 +8,12 @@
 import {FileNotTrackedError, getFileCommitDate} from '../gitUtils';
 import fs from 'fs-extra';
 import path from 'path';
-import os from 'os';
-import shell from 'shelljs';
+import {createTempRepo} from '@testing-utils/git';
 
-// This function is sync so the same mock repo can be shared across tests
 /* eslint-disable no-restricted-properties */
-function createTempRepo() {
-  const repoDir = fs.mkdtempSync(path.join(os.tmpdir(), 'git-test-repo'));
-  class Git {
-    constructor(private dir: string) {
-      const res = shell.exec('git init', {cwd: dir, silent: true});
-      if (res.code !== 0) {
-        throw new Error(`git init exited with code ${res.code}.
-stderr: ${res.stderr}
-stdout: ${res.stdout}`);
-      }
-      // Doesn't matter currently
-      shell.exec('git config user.email "test@jc-verse.com"', {
-        cwd: dir,
-        silent: true,
-      });
-      shell.exec('git config user.name "Test"', {cwd: dir, silent: true});
-    }
-    commit(msg: string, date: string, author: string) {
-      const addRes = shell.exec('git add .', {cwd: this.dir, silent: true});
-      const commitRes = shell.exec(
-        `git commit -m "${msg}" --date "${date}T00:00:00Z" --author "${author}"`,
-        {
-          cwd: this.dir,
-          env: {GIT_COMMITTER_DATE: `${date}T00:00:00Z`},
-          silent: true,
-        },
-      );
-      if (addRes.code !== 0) {
-        throw new Error(`git add exited with code ${addRes.code}.
-stderr: ${addRes.stderr}
-stdout: ${addRes.stdout}`);
-      }
-      if (commitRes.code !== 0) {
-        throw new Error(`git commit exited with code ${commitRes.code}.
-stderr: ${commitRes.stderr}
-stdout: ${commitRes.stdout}`);
-      }
-    }
-  }
-  const git = new Git(repoDir);
+function initializeTempRepo() {
+  const {repoDir, git} = createTempRepo();
+
   fs.writeFileSync(path.join(repoDir, 'test.txt'), 'Some content');
   git.commit(
     'Create test.txt',
@@ -79,11 +40,12 @@ stdout: ${commitRes.stdout}`);
     'Josh-Cena <josh-cena@jc-verse.com>',
   );
   fs.writeFileSync(path.join(repoDir, 'untracked.txt'), "I'm untracked");
+
   return repoDir;
 }
 
 describe('getFileCommitDate', () => {
-  const repoDir = createTempRepo();
+  const repoDir = initializeTempRepo();
   it('returns earliest commit date', async () => {
     expect(getFileCommitDate(path.join(repoDir, 'test.txt'), {})).toEqual({
       date: new Date('2020-06-19'),