Add squash merges option for editorial workflow

.all-contributorsrc

@@ -672,7 +672,8 @@
       "avatar_url": "https://avatars2.githubusercontent.com/u/357379?v=4",
       "profile": "http://chrisswithinbank.net/",
       "contributions": [
-        "doc"
+        "doc",
+        "code"
       ]
     },
     {

README.md

@@ -72,7 +72,7 @@ These wonderful folks are responsible for developing and maintaining Netlify CMS
 | [<img src="https://avatars0.githubusercontent.com/u/250958?v=4" width="100px;"/><br /><sub><b>Etienne Bernard</b></sub>](https://github.com/ebernard)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=ebernard "Documentation") | [<img src="https://avatars3.githubusercontent.com/u/871660?v=4" width="100px;"/><br /><sub><b>Eli Williamson</b></sub>](http://eliwilliamson.com)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=eliwilliamson "Code") [🎨](#design-eliwilliamson "Design") | [<img src="https://avatars0.githubusercontent.com/u/858837?v=4" width="100px;"/><br /><sub><b>Covington Doan</b></sub>](https://www.covingtondoan.com)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=covingtondoan "Documentation") | [<img src="https://avatars3.githubusercontent.com/u/1299080?v=4" width="100px;"/><br /><sub><b>Lennart Ziburski</b></sub>](http://lennartziburski.com)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=ziburski "Code") [🎨](#design-ziburski "Design") [📖](https://github.com/netlify/netlify-cms/commits?author=ziburski "Documentation") | [<img src="https://avatars1.githubusercontent.com/u/387640?v=4" width="100px;"/><br /><sub><b>Darrel O'Pry</b></sub>](http://darrelopry.com)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=dopry "Code") [🚇](#infra-dopry "Infrastructure (Hosting, Build-Tools, etc)") [⚠️](https://github.com/netlify/netlify-cms/commits?author=dopry "Tests") | [<img src="https://avatars1.githubusercontent.com/u/13856868?v=4" width="100px;"/><br /><sub><b>Erin Symons</b></sub>](https://github.com/yourfrienderin)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=yourfrienderin "Documentation") | [<img src="https://avatars0.githubusercontent.com/u/5200555?v=4" width="100px;"/><br /><sub><b>Austin Green</b></sub>](https://github.com/AustinGreen)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=AustinGreen "Documentation") [💡](#example-AustinGreen "Examples") |
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-| [<img src="https://avatars3.githubusercontent.com/u/802086?v=4" width="100px;"/><br /><sub><b>Luís Miguel</b></sub>](https://github.com/Quicksaver)<br />[🐛](https://github.com/netlify/netlify-cms/issues?q=author%3AQuicksaver "Bug reports") [💻](https://github.com/netlify/netlify-cms/commits?author=Quicksaver "Code") | [<img src="https://avatars2.githubusercontent.com/u/357379?v=4" width="100px;"/><br /><sub><b>Chris Swithinbank</b></sub>](http://chrisswithinbank.net/)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=delucis "Documentation") | [<img src="https://avatars3.githubusercontent.com/u/1262221?v=4" width="100px;"/><br /><sub><b>remmah</b></sub>](https://github.com/remmah)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=remmah "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/29388?v=4" width="100px;"/><br /><sub><b>Sumeet Jain</b></sub>](http://sumeetjain.com)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=sumeetjain "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/26816046?v=4" width="100px;"/><br /><sub><b>Sagar Khatri</b></sub>](https://github.com/ragasirtahk)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=ragasirtahk "Documentation") [💡](#example-ragasirtahk "Examples") | [<img src="https://avatars0.githubusercontent.com/u/8182932?v=4" width="100px;"/><br /><sub><b>Kevin Doocey</b></sub>](https://www.dooceykev.in)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=Doocey "Code") | [<img src="https://avatars0.githubusercontent.com/u/31023010?v=4" width="100px;"/><br /><sub><b>Swieckowski</b></sub>](https://www.linkedin.com/in/arthur-swieckowski/)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=Swieckowski "Code") [📖](https://github.com/netlify/netlify-cms/commits?author=Swieckowski "Documentation") [⚠️](https://github.com/netlify/netlify-cms/commits?author=Swieckowski "Tests") |
+| [<img src="https://avatars3.githubusercontent.com/u/802086?v=4" width="100px;"/><br /><sub><b>Luís Miguel</b></sub>](https://github.com/Quicksaver)<br />[🐛](https://github.com/netlify/netlify-cms/issues?q=author%3AQuicksaver "Bug reports") [💻](https://github.com/netlify/netlify-cms/commits?author=Quicksaver "Code") | [<img src="https://avatars2.githubusercontent.com/u/357379?v=4" width="100px;"/><br /><sub><b>Chris Swithinbank</b></sub>](http://chrisswithinbank.net/)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=delucis "Documentation") [💻](https://github.com/netlify/netlify-cms/commits?author=delucis "Code") | [<img src="https://avatars3.githubusercontent.com/u/1262221?v=4" width="100px;"/><br /><sub><b>remmah</b></sub>](https://github.com/remmah)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=remmah "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/29388?v=4" width="100px;"/><br /><sub><b>Sumeet Jain</b></sub>](http://sumeetjain.com)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=sumeetjain "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/26816046?v=4" width="100px;"/><br /><sub><b>Sagar Khatri</b></sub>](https://github.com/ragasirtahk)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=ragasirtahk "Documentation") [💡](#example-ragasirtahk "Examples") | [<img src="https://avatars0.githubusercontent.com/u/8182932?v=4" width="100px;"/><br /><sub><b>Kevin Doocey</b></sub>](https://www.dooceykev.in)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=Doocey "Code") | [<img src="https://avatars0.githubusercontent.com/u/31023010?v=4" width="100px;"/><br /><sub><b>Swieckowski</b></sub>](https://www.linkedin.com/in/arthur-swieckowski/)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=Swieckowski "Code") [📖](https://github.com/netlify/netlify-cms/commits?author=Swieckowski "Documentation") [⚠️](https://github.com/netlify/netlify-cms/commits?author=Swieckowski "Tests") |
 | [<img src="https://avatars2.githubusercontent.com/u/283419?v=4" width="100px;"/><br /><sub><b>Tim Carry</b></sub>](http://www.pixelastic.com/)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=pixelastic "Code") [🎨](#design-pixelastic "Design") [📖](https://github.com/netlify/netlify-cms/commits?author=pixelastic "Documentation") | [<img src="https://avatars0.githubusercontent.com/u/30510616?v=4" width="100px;"/><br /><sub><b>Sol Park</b></sub>](https://github.com/solpark)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=solpark "Code") | [<img src="https://avatars0.githubusercontent.com/u/29218846?v=4" width="100px;"/><br /><sub><b>Michael Romani</b></sub>](https://github.com/MichaelRomani)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=MichaelRomani "Code") | [<img src="https://avatars1.githubusercontent.com/u/15175868?v=4" width="100px;"/><br /><sub><b>Xifeng Jin</b></sub>](http://linkedin/in/xifengjin88)<br />[🐛](https://github.com/netlify/netlify-cms/issues?q=author%3Axifengjin88 "Bug reports") [💻](https://github.com/netlify/netlify-cms/commits?author=xifengjin88 "Code") | [<img src="https://avatars1.githubusercontent.com/u/372831?v=4" width="100px;"/><br /><sub><b>Pedro Duarte</b></sub>](http://pedroduarte.me)<br />[🐛](https://github.com/netlify/netlify-cms/issues?q=author%3Apeduarte "Bug reports") [💻](https://github.com/netlify/netlify-cms/commits?author=peduarte "Code") [📖](https://github.com/netlify/netlify-cms/commits?author=peduarte "Documentation") | [<img src="https://avatars1.githubusercontent.com/u/6064830?v=4" width="100px;"/><br /><sub><b>Antonio Argote</b></sub>](http://antonioargote.com)<br />[🎨](#design-Strangehill "Design") | [<img src="https://avatars3.githubusercontent.com/u/1479451?v=4" width="100px;"/><br /><sub><b>Kristaps Taube</b></sub>](https://www.ktaube.com)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=ktaube "Code") |
 | [<img src="https://avatars3.githubusercontent.com/u/26639499?v=4" width="100px;"/><br /><sub><b>David Ko</b></sub>](https://github.com/daveyko)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=daveyko "Code") | [<img src="https://avatars3.githubusercontent.com/u/440562?v=4" width="100px;"/><br /><sub><b>Iñaki García</b></sub>](http://www.txorua.com)<br />[🎨](#design-igarbla "Design") | [<img src="https://avatars3.githubusercontent.com/u/27162255?v=4" width="100px;"/><br /><sub><b>Sam</b></sub>](https://github.com/gazebosx3)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=gazebosx3 "Code") | [<img src="https://avatars1.githubusercontent.com/u/174777?v=4" width="100px;"/><br /><sub><b>Josh Dzielak</b></sub>](https://dzello.com)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=dzello "Documentation") | [<img src="https://avatars0.githubusercontent.com/u/2193?v=4" width="100px;"/><br /><sub><b>Jeremy Bise</b></sub>](http://thosegeeks.com)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=jeremybise "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/13282103?v=4" width="100px;"/><br /><sub><b>terrierscript</b></sub>](https://terrierscript.com)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=terrierscript "Code") | [<img src="https://avatars0.githubusercontent.com/u/3949335?v=4" width="100px;"/><br /><sub><b>Christopher Geary</b></sub>](https://twitter.com/crgeary)<br />[🔌](#plugin-crgeary "Plugin/utility libraries") |
 | [<img src="https://avatars0.githubusercontent.com/u/23248886?v=4" width="100px;"/><br /><sub><b>Brian Macdonald</b></sub>](https://github.com/brianlmacdonald)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=brianlmacdonald "Code") | [<img src="https://avatars1.githubusercontent.com/u/15092?v=4" width="100px;"/><br /><sub><b>John Vandenberg</b></sub>](https://jayvdb.github.io/)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=jayvdb "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/24911956?v=4" width="100px;"/><br /><sub><b>MarkZither</b></sub>](https://github.com/MarkZither)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=MarkZither "Documentation") | [<img src="https://avatars1.githubusercontent.com/u/9257284?v=4" width="100px;"/><br /><sub><b>Rob Phoenix</b></sub>](https://www.robphoenix.com)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=robphoenix "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/3028764?v=4" width="100px;"/><br /><sub><b>Steve Lathrop</b></sub>](https://www.SteLa.io)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=slathrop "Code") [📖](https://github.com/netlify/netlify-cms/commits?author=slathrop "Documentation") [💡](#example-slathrop "Examples") | [<img src="https://avatars0.githubusercontent.com/u/10004167?v=4" width="100px;"/><br /><sub><b>Maciej Matuszewski</b></sub>](https://github.com/maciejmatu)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=maciejmatu "Code") |

src/actions/config.js

@@ -50,6 +50,9 @@ export function validateConfig(config) {
   if (typeof config.getIn(['backend', 'name']) !== 'string') {
     throw new Error("Error in configuration file: Your `backend.name` must be a string. Check your config.yml file.");
   }
+  if (!isBoolean(config.getIn(['backend', 'squash_merges'], false))) {
+    throw new Error("Error in configuration file: Your `backend.squash_merges` must be a boolean. Check your config.yml file.");
+  }
   if (!config.get('media_folder')) {
     throw new Error("Error in configuration file: A `media_folder` wasn\'t found. Check your config.yml file.");
   }

src/backends/git-gateway/implementation.js

@@ -70,6 +70,7 @@ export default class GitGateway extends GitHubBackend {
           branch: this.branch,
           tokenPromise: this.tokenPromise,
           commitAuthor: pick(userData, ["name", "email"]),
+          squash_merges: this.squash_merges,
         });
         return userData;
       } else {

src/backends/github/API.js

@@ -15,6 +15,7 @@ export default class API {
     this.branch = config.branch || "master";
     this.repo = config.repo || "";
     this.repoURL = `/repos/${ this.repo }`;
+    this.merge_method = config.squash_merges ? "squash" : "merge";
   }
 
   user() {
@@ -635,6 +636,7 @@ export default class API {
       body: JSON.stringify({
         commit_message: "Automatically generated. Merged on Netlify CMS.",
         sha: headSha,
+        merge_method: this.merge_method,
       }),
     })
     .catch((error) => {

src/backends/github/implementation.js

@@ -17,6 +17,7 @@ export default class GitHub {
     this.branch = config.getIn(["backend", "branch"], "master").trim();
     this.api_root = config.getIn(["backend", "api_root"], "https://api.github.com");
     this.token = '';
+    this.squash_merges = config.getIn(["backend", "squash_merges"]);
   }
 
   authComponent() {
@@ -29,7 +30,7 @@ export default class GitHub {
 
   authenticate(state) {
     this.token = state.token;
-    this.api = new API({ token: this.token, branch: this.branch, repo: this.repo, api_root: this.api_root });
+    this.api = new API({ token: this.token, branch: this.branch, repo: this.repo, api_root: this.api_root, squash_merges: this.squash_merges });
     return this.api.user().then(user =>
       this.api.hasWriteAccess().then((isCollab) => {
         // Unauthorized user

website/site/content/docs/beta-features.md

@@ -77,3 +77,10 @@ import styles from '!css-loader!sass-loader!../main.scss'
 CMS.registerPreviewStyle(styles.toString(), { raw: true })
 ```
 
+## Squash merge GitHub pull requests
+When using the [Editorial Workflow publish mode](/docs/configuration-options/#publish-mode) with the `github` or `git-gateway` backends, Netlify CMS creates pull requests to hold drafts while they are being edited and then merges them into your main branch when you press publish. By default, these are merged preserving the history of all the individual commits (i.e. changes where you pressed save). If instead you would like [“squash”](https://help.github.com/articles/about-pull-request-merges/#squash-and-merge-your-pull-request-commits) these commits, reducing clutter in your repository’s history, you can set the following option in your `config.yml`:
+
+```yaml
+backend:
+  squash_merges: true
+```