From e7f74f4bb28f765dde5e7a4e322890dd81f2052d Mon Sep 17 00:00:00 2001
From: sbansal3096 <sbansal3096@gmail.com>
Date: Thu, 23 Aug 2018 10:50:49 +0530
Subject: [PATCH 1/9] Adding last updated time for docs

---
 lib/core/DocsLayout.js | 15 +++++++++++++++
 package.json           |  1 +
 2 files changed, 16 insertions(+)

diff --git a/lib/core/DocsLayout.js b/lib/core/DocsLayout.js
index decf445e4b84..ee44d43c2ab5 100644
--- a/lib/core/DocsLayout.js
+++ b/lib/core/DocsLayout.js
@@ -40,6 +40,17 @@ class DocsLayout extends React.Component {
     if (this.props.Doc) {
       DocComponent = this.props.Doc;
     }
+    const spawn = require('cross-spawn');
+    const timeSpan = spawn
+      .sync('git', [
+        'log',
+        '-1',
+        '--format=%ct',
+        `versioned_docs/${metadata.source}`,
+      ])
+      .stdout.toString('utf-8');
+    const date = new Date(parseInt(timeSpan, 10) * 1000);
+    const updateTime = date.toLocaleString();
     const title = i18n
       ? translation[this.props.metadata.language]['localized-strings'][
           this.props.metadata.localized_id
@@ -110,6 +121,10 @@ class DocsLayout extends React.Component {
                 </a>
               )}
             </div>
+            <p style={{fontSize: '12px', textAlign: 'right'}}>
+              <strong>Last updated: </strong>
+              {updateTime}
+            </p>
           </Container>
           {hasOnPageNav && (
             <nav className="onPageNav">
diff --git a/package.json b/package.json
index 7f6705aa1d49..996366c6827d 100644
--- a/package.json
+++ b/package.json
@@ -68,6 +68,7 @@
     "classnames": "^2.2.6",
     "color": "^2.0.1",
     "commander": "^2.16.0",
+    "cross-spawn": "^6.0.5",
     "crowdin-cli": "^0.3.0",
     "cssnano": "^3.10.0",
     "escape-string-regexp": "^1.0.5",

From 6ef809bf8aca6be936db5f263339195fb3a2505e Mon Sep 17 00:00:00 2001
From: sbansal3096 <sbansal3096@gmail.com>
Date: Thu, 23 Aug 2018 17:06:12 +0530
Subject: [PATCH 2/9] Making file path general and other suggested changes

---
 lib/core/DocsLayout.js | 16 +++++-----------
 lib/core/utils.js      | 10 ++++++++++
 lib/server/docs.js     | 11 ++++++++++-
 3 files changed, 25 insertions(+), 12 deletions(-)

diff --git a/lib/core/DocsLayout.js b/lib/core/DocsLayout.js
index ee44d43c2ab5..f21766411897 100644
--- a/lib/core/DocsLayout.js
+++ b/lib/core/DocsLayout.js
@@ -10,12 +10,14 @@ const path = require('path');
 const React = require('react');
 const url = require('url');
 
+const utils = require('./utils.js');
 const Container = require('./Container.js');
 const Doc = require('./Doc.js');
 const DocsSidebar = require('./DocsSidebar.js');
 const OnPageNav = require('./nav/OnPageNav.js');
 const Site = require('./Site.js');
 const translation = require('../server/translation.js');
+const docs = require('../server/docs.js');
 
 // component used to generate whole webpage for docs, including sidebar/header/footer
 class DocsLayout extends React.Component {
@@ -40,17 +42,9 @@ class DocsLayout extends React.Component {
     if (this.props.Doc) {
       DocComponent = this.props.Doc;
     }
-    const spawn = require('cross-spawn');
-    const timeSpan = spawn
-      .sync('git', [
-        'log',
-        '-1',
-        '--format=%ct',
-        `versioned_docs/${metadata.source}`,
-      ])
-      .stdout.toString('utf-8');
-    const date = new Date(parseInt(timeSpan, 10) * 1000);
-    const updateTime = date.toLocaleString();
+
+    const filepath = docs.getFilePath(metadata);
+    const updateTime = utils.getGitLastUpdated(filepath);
     const title = i18n
       ? translation[this.props.metadata.language]['localized-strings'][
           this.props.metadata.localized_id
diff --git a/lib/core/utils.js b/lib/core/utils.js
index 5e4b66e9fed6..9e1948e04cbe 100644
--- a/lib/core/utils.js
+++ b/lib/core/utils.js
@@ -28,9 +28,19 @@ function getPath(path, cleanUrl = false) {
   return path;
 }
 
+function getGitLastUpdated(filepath) {
+  const spawn = require('cross-spawn');
+  const timeSpan = spawn
+    .sync('git', ['log', '-1', '--format=%ct', filepath])
+    .stdout.toString('utf-8');
+  const date = new Date(parseInt(timeSpan, 10) * 1000);
+  return date.toLocaleString();
+}
+
 module.exports = {
   blogPostHasTruncateMarker,
   extractBlogPostBeforeTruncate,
   getPath,
   removeExtension,
+  getGitLastUpdated,
 };
diff --git a/lib/server/docs.js b/lib/server/docs.js
index be0cb9ffe276..387985198a05 100644
--- a/lib/server/docs.js
+++ b/lib/server/docs.js
@@ -15,7 +15,7 @@ const readMetadata = require('./readMetadata.js');
 const {insertTOC} = require('../core/toc.js');
 const {getPath} = require('../core/utils.js');
 
-function getFile(metadata) {
+function getFilePath(metadata) {
   if (!metadata) {
     return null;
   }
@@ -31,6 +31,14 @@ function getFile(metadata) {
   } else {
     file = join(CWD, '..', readMetadata.getDocsPath(), metadata.source);
   }
+  return file;
+}
+
+function getFile(metadata) {
+  if (!metadata) {
+    return null;
+  }
+  const file = getFilePath(metadata);
   if (!fs.existsSync(file)) {
     return null;
   }
@@ -123,6 +131,7 @@ function getRedirectMarkup(metadata) {
 module.exports = {
   getMarkup,
   getFile,
+  getFilePath,
   getRedirectMarkup,
   mdToHtmlify,
   replaceAssetsLink,

From fe7d6c1476c573314d07db5727fc0cd0844915db Mon Sep 17 00:00:00 2001
From: sbansal3096 <sbansal3096@gmail.com>
Date: Thu, 23 Aug 2018 17:38:53 +0530
Subject: [PATCH 3/9] Checking if time returned is null due to absence of git
 or some other issue

---
 lib/core/DocsLayout.js | 10 ++++++----
 lib/core/utils.js      |  7 +++++--
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/lib/core/DocsLayout.js b/lib/core/DocsLayout.js
index f21766411897..13912b063ef0 100644
--- a/lib/core/DocsLayout.js
+++ b/lib/core/DocsLayout.js
@@ -115,10 +115,12 @@ class DocsLayout extends React.Component {
                 </a>
               )}
             </div>
-            <p style={{fontSize: '12px', textAlign: 'right'}}>
-              <strong>Last updated: </strong>
-              {updateTime}
-            </p>
+            {updateTime !== null ? (
+              <p style={{fontSize: '12px', textAlign: 'right'}}>
+                <strong>Last updated: </strong>
+                {updateTime}
+              </p>
+            ) : null}
           </Container>
           {hasOnPageNav && (
             <nav className="onPageNav">
diff --git a/lib/core/utils.js b/lib/core/utils.js
index 9e1948e04cbe..8a3707afb89d 100644
--- a/lib/core/utils.js
+++ b/lib/core/utils.js
@@ -33,8 +33,11 @@ function getGitLastUpdated(filepath) {
   const timeSpan = spawn
     .sync('git', ['log', '-1', '--format=%ct', filepath])
     .stdout.toString('utf-8');
-  const date = new Date(parseInt(timeSpan, 10) * 1000);
-  return date.toLocaleString();
+  if (timeSpan) {
+    const date = new Date(parseInt(timeSpan, 10) * 1000);
+    return date.toLocaleString();
+  }
+  return null;
 }
 
 module.exports = {

From 765ec01ebbd05697836a36596f10aa52c1a72ce9 Mon Sep 17 00:00:00 2001
From: sbansal3096 <sbansal3096@gmail.com>
Date: Fri, 24 Aug 2018 23:56:00 +0530
Subject: [PATCH 4/9] Adding option to enable/disable update time feature and
 test-doc

---
 lib/core/DocsLayout.js                      | 21 ++++++++++++---------
 lib/core/__tests__/__fixtures__/test-doc.md |  0
 website/siteConfig.js                       |  1 +
 3 files changed, 13 insertions(+), 9 deletions(-)
 create mode 100644 lib/core/__tests__/__fixtures__/test-doc.md

diff --git a/lib/core/DocsLayout.js b/lib/core/DocsLayout.js
index 13912b063ef0..18ea9a9cae22 100644
--- a/lib/core/DocsLayout.js
+++ b/lib/core/DocsLayout.js
@@ -42,9 +42,11 @@ class DocsLayout extends React.Component {
     if (this.props.Doc) {
       DocComponent = this.props.Doc;
     }
-
-    const filepath = docs.getFilePath(metadata);
-    const updateTime = utils.getGitLastUpdated(filepath);
+    let updateTime;
+    if (this.props.config.enableUpdateTime) {
+      const filepath = docs.getFilePath(metadata);
+      updateTime = utils.getGitLastUpdated(filepath);
+    }
     const title = i18n
       ? translation[this.props.metadata.language]['localized-strings'][
           this.props.metadata.localized_id
@@ -115,12 +117,13 @@ class DocsLayout extends React.Component {
                 </a>
               )}
             </div>
-            {updateTime !== null ? (
-              <p style={{fontSize: '12px', textAlign: 'right'}}>
-                <strong>Last updated: </strong>
-                {updateTime}
-              </p>
-            ) : null}
+            {this.props.config.enableUpdateTime &&
+              updateTime && (
+                <p style={{fontSize: '12px', textAlign: 'right'}}>
+                  <strong>Last updated: </strong>
+                  {updateTime}
+                </p>
+              )}
           </Container>
           {hasOnPageNav && (
             <nav className="onPageNav">
diff --git a/lib/core/__tests__/__fixtures__/test-doc.md b/lib/core/__tests__/__fixtures__/test-doc.md
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/website/siteConfig.js b/website/siteConfig.js
index 1a64eefe39c0..ba62d72b1847 100644
--- a/website/siteConfig.js
+++ b/website/siteConfig.js
@@ -69,6 +69,7 @@ const siteConfig = {
   scrollToTopOptions: {
     zIndex: 100,
   },
+  enableUpdateTime: true,
 };
 
 module.exports = siteConfig;

From 83d92aa33858c3012f38c3e58f9547be11734369 Mon Sep 17 00:00:00 2001
From: sbansal3096 <sbansal3096@gmail.com>
Date: Sat, 25 Aug 2018 00:01:40 +0530
Subject: [PATCH 5/9] Adding simple unit tests for getGitUpdateTime()

---
 lib/core/__tests__/utils.test.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/core/__tests__/utils.test.js b/lib/core/__tests__/utils.test.js
index 5c1e9ec53d4d..b1a6e4154a27 100644
--- a/lib/core/__tests__/utils.test.js
+++ b/lib/core/__tests__/utils.test.js
@@ -63,4 +63,11 @@ describe('utils', () => {
     expect(utils.removeExtension('/docs/test')).toBe('/docs/test');
     expect(utils.removeExtension('pages.js')).toBe('pages');
   });
+
+  test('getGitUpdateTime', () => {
+    const filepath =
+      '/home/shubham/Documents/Docusaurus/lib/core/__tests__/__fixtures__/test-doc.md';
+    expect(utils.getGitLastUpdated(filepath)).toBe('8/24/2018, 11:56:00 PM');
+    expect(utils.getGitLastUpdated(filepath + 'random')).toBeNull(); // Modify filepath to make it any invalid path
+  });
 });

From 14dfd44de7cec83410ff48b7e562b50c2852627d Mon Sep 17 00:00:00 2001
From: endiliey <endiliey@gmail.com>
Date: Sat, 25 Aug 2018 12:04:40 +0800
Subject: [PATCH 6/9] nits & rewrote failing test

---
 lib/core/__tests__/__fixtures__/test-doc.md |  0
 lib/core/__tests__/__fixtures__/test.md     |  5 ++++
 lib/core/__tests__/utils.test.js            | 26 +++++++++++++++++----
 lib/core/utils.js                           |  4 ++--
 4 files changed, 29 insertions(+), 6 deletions(-)
 delete mode 100644 lib/core/__tests__/__fixtures__/test-doc.md
 create mode 100644 lib/core/__tests__/__fixtures__/test.md

diff --git a/lib/core/__tests__/__fixtures__/test-doc.md b/lib/core/__tests__/__fixtures__/test-doc.md
deleted file mode 100644
index e69de29bb2d1..000000000000
diff --git a/lib/core/__tests__/__fixtures__/test.md b/lib/core/__tests__/__fixtures__/test.md
new file mode 100644
index 000000000000..d7911a7f6da0
--- /dev/null
+++ b/lib/core/__tests__/__fixtures__/test.md
@@ -0,0 +1,5 @@
+---
+title: Don't edit this
+---
+
+Do not edit this file
diff --git a/lib/core/__tests__/utils.test.js b/lib/core/__tests__/utils.test.js
index b1a6e4154a27..d215c86d96ef 100644
--- a/lib/core/__tests__/utils.test.js
+++ b/lib/core/__tests__/utils.test.js
@@ -65,9 +65,27 @@ describe('utils', () => {
   });
 
   test('getGitUpdateTime', () => {
-    const filepath =
-      '/home/shubham/Documents/Docusaurus/lib/core/__tests__/__fixtures__/test-doc.md';
-    expect(utils.getGitLastUpdated(filepath)).toBe('8/24/2018, 11:56:00 PM');
-    expect(utils.getGitLastUpdated(filepath + 'random')).toBeNull(); // Modify filepath to make it any invalid path
+    // existing test file in repository with git timestamp
+    const existingFilePath = path.join(__dirname, '__fixtures__', 'test.md');
+    const gitUpdateTime = utils.getGitLastUpdated(existingFilePath);
+    expect(typeof gitUpdateTime).toBe('string');
+    expect(Date.parse(gitUpdateTime)).not.toBeNaN();
+    expect(gitUpdateTime).not.toBeNull();
+
+    // non existing file
+    const nonExistingFilePath = path.join(
+      __dirname,
+      '__fixtures__',
+      '.nonExisting'
+    );
+    expect(utils.getGitLastUpdated(null)).toBeNull();
+    expect(utils.getGitLastUpdated(undefined)).toBeNull();
+    expect(utils.getGitLastUpdated(nonExistingFilePath)).toBeNull();
+
+    // temporary created file that has no git timestamp
+    const tempFilePath = path.join(__dirname, '__fixtures__', '.temp');
+    fs.writeFileSync(tempFilePath, 'Lorem ipsum :)');
+    expect(utils.getGitLastUpdated(tempFilePath)).toBeNull();
+    fs.unlinkSync(tempFilePath);
   });
 });
diff --git a/lib/core/utils.js b/lib/core/utils.js
index 8a3707afb89d..afabe1b4c4b1 100644
--- a/lib/core/utils.js
+++ b/lib/core/utils.js
@@ -4,6 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  */
+const spawn = require('cross-spawn');
 
 const TRUNCATE_MARKER = /<!--\s*truncate\s*-->/;
 
@@ -29,7 +30,6 @@ function getPath(path, cleanUrl = false) {
 }
 
 function getGitLastUpdated(filepath) {
-  const spawn = require('cross-spawn');
   const timeSpan = spawn
     .sync('git', ['log', '-1', '--format=%ct', filepath])
     .stdout.toString('utf-8');
@@ -43,7 +43,7 @@ function getGitLastUpdated(filepath) {
 module.exports = {
   blogPostHasTruncateMarker,
   extractBlogPostBeforeTruncate,
+  getGitLastUpdated,
   getPath,
   removeExtension,
-  getGitLastUpdated,
 };

From 9cc0f216871abd443d4088099525c626cf068e96 Mon Sep 17 00:00:00 2001
From: endiliey <endiliey@gmail.com>
Date: Sat, 25 Aug 2018 21:32:33 +0800
Subject: [PATCH 7/9] consistent test naming

---
 lib/core/__tests__/utils.test.js | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/lib/core/__tests__/utils.test.js b/lib/core/__tests__/utils.test.js
index d215c86d96ef..108998220f14 100644
--- a/lib/core/__tests__/utils.test.js
+++ b/lib/core/__tests__/utils.test.js
@@ -64,13 +64,13 @@ describe('utils', () => {
     expect(utils.removeExtension('pages.js')).toBe('pages');
   });
 
-  test('getGitUpdateTime', () => {
+  test('getGitLastUpdated', () => {
     // existing test file in repository with git timestamp
     const existingFilePath = path.join(__dirname, '__fixtures__', 'test.md');
-    const gitUpdateTime = utils.getGitLastUpdated(existingFilePath);
-    expect(typeof gitUpdateTime).toBe('string');
-    expect(Date.parse(gitUpdateTime)).not.toBeNaN();
-    expect(gitUpdateTime).not.toBeNull();
+    const gitLastUpdated = utils.getGitLastUpdated(existingFilePath);
+    expect(typeof gitLastUpdated).toBe('string');
+    expect(Date.parse(gitLastUpdated)).not.toBeNaN();
+    expect(gitLastUpdated).not.toBeNull();
 
     // non existing file
     const nonExistingFilePath = path.join(

From 083d2aabdd2d414cafce3ca55c9429952d6ce9a7 Mon Sep 17 00:00:00 2001
From: sbansal3096 <sbansal3096@gmail.com>
Date: Wed, 29 Aug 2018 16:40:53 +0530
Subject: [PATCH 8/9] Adding optional updateEnableTime in documentation

---
 docs/api-site-config.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/docs/api-site-config.md b/docs/api-site-config.md
index 2164c0f526d9..17ede83f2078 100644
--- a/docs/api-site-config.md
+++ b/docs/api-site-config.md
@@ -98,6 +98,8 @@ customDocsPath: 'website-docs';
 
 `editUrl` - URL for editing docs, usage example: `editUrl + 'en/doc1.md'`. If this field is omitted, there will be no "Edit this Doc" button for each document.
 
+`enableUpdateTime` - An option to enable the docs showing last update time. Set to `true` to show a line at the bottom right corner of each doc page as `Last Updated: dd/mm/yyyy hh:MM:ss Z`.
+
 `facebookAppId` - If you want Facebook Like/Share buttons in the footer and at the bottom of your blog posts, provide a [Facebook application id](https://www.facebook.com/help/audiencenetwork/804209223039296).
 
 `facebookComments` - Set this to `true` if you want to enable Facebook comments at the bottom of your blog post. `facebookAppId` has to be also set.

From ca7e72ff5171f3de9587d73d16aa881a0e57f140 Mon Sep 17 00:00:00 2001
From: endiliey <endiliey@gmail.com>
Date: Wed, 29 Aug 2018 20:59:34 +0800
Subject: [PATCH 9/9] package-lock & yarn.lock

---
 package-lock.json | 94 +++++++++++++++++++++++++++++++++++++++++------
 yarn.lock         | 16 +++++++-
 2 files changed, 98 insertions(+), 12 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index d25b95f6d9ff..b439fc57e41a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2650,11 +2650,13 @@
       }
     },
     "cross-spawn": {
-      "version": "5.1.0",
-      "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-5.1.0.tgz",
-      "integrity": "sha1-6L0O/uWPz/b4+UUQoKVUu/ojVEk=",
+      "version": "6.0.5",
+      "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz",
+      "integrity": "sha512-eTVLrBSt7fjbDygz805pMnstIs2VTBNkRm0qxZd+M7A5XDdxVRWO5MxGBXZhjY4cqLYLdtrGqRf8mBPmzwSpWQ==",
       "requires": {
-        "lru-cache": "^4.0.1",
+        "nice-try": "^1.0.4",
+        "path-key": "^2.0.1",
+        "semver": "^5.5.0",
         "shebang-command": "^1.2.0",
         "which": "^1.2.9"
       }
@@ -3094,6 +3096,11 @@
       "resolved": "https://registry.npmjs.org/deep-is/-/deep-is-0.1.2.tgz",
       "integrity": "sha1-nO1l6gvAsJ9CptecGxkD+dkTzBg="
     },
+    "deepmerge": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/deepmerge/-/deepmerge-2.1.1.tgz",
+      "integrity": "sha512-urQxA1smbLZ2cBbXbaYObM1dJ82aJ2H57A1C/Kklfh/ZN1bgH4G/n5KWhdNfOK11W98gqZfyYj7W4frJJRwA2w=="
+    },
     "default-require-extensions": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/default-require-extensions/-/default-require-extensions-2.0.0.tgz",
@@ -3553,6 +3560,17 @@
           "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
           "dev": true
         },
+        "cross-spawn": {
+          "version": "5.1.0",
+          "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-5.1.0.tgz",
+          "integrity": "sha1-6L0O/uWPz/b4+UUQoKVUu/ojVEk=",
+          "dev": true,
+          "requires": {
+            "lru-cache": "^4.0.1",
+            "shebang-command": "^1.2.0",
+            "which": "^1.2.9"
+          }
+        },
         "debug": {
           "version": "3.1.0",
           "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
@@ -3898,6 +3916,18 @@
         "p-finally": "^1.0.0",
         "signal-exit": "^3.0.0",
         "strip-eof": "^1.0.0"
+      },
+      "dependencies": {
+        "cross-spawn": {
+          "version": "5.1.0",
+          "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-5.1.0.tgz",
+          "integrity": "sha1-6L0O/uWPz/b4+UUQoKVUu/ojVEk=",
+          "requires": {
+            "lru-cache": "^4.0.1",
+            "shebang-command": "^1.2.0",
+            "which": "^1.2.9"
+          }
+        }
       }
     },
     "executable": {
@@ -4407,12 +4437,14 @@
         "balanced-match": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -4427,17 +4459,20 @@
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -4554,7 +4589,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -4566,6 +4602,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -4580,6 +4617,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
@@ -4587,12 +4625,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.2.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.1",
             "yallist": "^3.0.0"
@@ -4611,6 +4651,7 @@
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -4691,7 +4732,8 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -4703,6 +4745,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -4824,6 +4867,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -7189,6 +7233,19 @@
             "p-finally": "^1.0.0",
             "signal-exit": "^3.0.0",
             "strip-eof": "^1.0.0"
+          },
+          "dependencies": {
+            "cross-spawn": {
+              "version": "5.1.0",
+              "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-5.1.0.tgz",
+              "integrity": "sha1-6L0O/uWPz/b4+UUQoKVUu/ojVEk=",
+              "dev": true,
+              "requires": {
+                "lru-cache": "^4.0.1",
+                "shebang-command": "^1.2.0",
+                "which": "^1.2.9"
+              }
+            }
           }
         },
         "expand-brackets": {
@@ -8299,6 +8356,11 @@
       "resolved": "https://registry.npmjs.org/negotiator/-/negotiator-0.6.1.tgz",
       "integrity": "sha1-KzJxhOiZIQEXeyhWP7XnECrNDKk="
     },
+    "nice-try": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/nice-try/-/nice-try-1.0.5.tgz",
+      "integrity": "sha512-1nh45deeb5olNY7eX82BkPO7SSxR5SSYJiPTrTdFUVYwAl8CKMA5N9PjTYkHiRjisVcxcQ1HXdLhx2qxxJzLNQ=="
+    },
     "node-fetch": {
       "version": "1.6.3",
       "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-1.6.3.tgz",
@@ -10923,6 +10985,16 @@
             "supports-color": "^2.0.0"
           }
         },
+        "cross-spawn": {
+          "version": "5.1.0",
+          "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-5.1.0.tgz",
+          "integrity": "sha1-6L0O/uWPz/b4+UUQoKVUu/ojVEk=",
+          "requires": {
+            "lru-cache": "^4.0.1",
+            "shebang-command": "^1.2.0",
+            "which": "^1.2.9"
+          }
+        },
         "figures": {
           "version": "2.0.0",
           "resolved": "https://registry.npmjs.org/figures/-/figures-2.0.0.tgz",
diff --git a/yarn.lock b/yarn.lock
index de2eb9237fb0..dca200f4e9dd 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1721,6 +1721,16 @@ cross-spawn@5.1.0, cross-spawn@^5.0.1, cross-spawn@^5.1.0:
     shebang-command "^1.2.0"
     which "^1.2.9"
 
+cross-spawn@^6.0.5:
+  version "6.0.5"
+  resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-6.0.5.tgz#4a5ec7c64dfae22c3a14124dbacdee846d80cbc4"
+  dependencies:
+    nice-try "^1.0.4"
+    path-key "^2.0.1"
+    semver "^5.5.0"
+    shebang-command "^1.2.0"
+    which "^1.2.9"
+
 crowdin-cli@^0.3.0:
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/crowdin-cli/-/crowdin-cli-0.3.0.tgz#eac9989a6fe7feaaf33090397afc187c67b46191"
@@ -5043,6 +5053,10 @@ negotiator@0.6.1:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-0.6.1.tgz#2b327184e8992101177b28563fb5e7102acd0ca9"
 
+nice-try@^1.0.4:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/nice-try/-/nice-try-1.0.5.tgz#a3378a7696ce7d223e88fc9b764bd7ef1089e366"
+
 node-fetch@1.6.3:
   version "1.6.3"
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-1.6.3.tgz#dc234edd6489982d58e8f0db4f695029abcd8c04"
@@ -5482,7 +5496,7 @@ path-is-inside@^1.0.1, path-is-inside@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/path-is-inside/-/path-is-inside-1.0.2.tgz#365417dede44430d1c11af61027facf074bdfc53"
 
-path-key@^2.0.0:
+path-key@^2.0.0, path-key@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/path-key/-/path-key-2.0.1.tgz#411cadb574c5a140d3a4b1910d40d80cc9f40b40"