Add squash merges option for editorial workflow (#1330)

.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") |
 | [<img src="https://avatars2.githubusercontent.com/u/799360?v=4" width="100px;"/><br /><sub><b>Bryan Robinson</b></sub>](http://bryanlrobinson.com)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=brob "Documentation") | [<img src="https://avatars1.githubusercontent.com/u/561983?v=4" width="100px;"/><br /><sub><b>Darren</b></sub>](https://github.com/dardub)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=dardub "Documentation") | [<img src="https://avatars3.githubusercontent.com/u/576512?v=4" width="100px;"/><br /><sub><b>Richard Pullinger</b></sub>](http://www.richardpullinger.com)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=rpullinger "Code") | [<img src="https://avatars1.githubusercontent.com/u/3718939?v=4" width="100px;"/><br /><sub><b>Taylor Bryant</b></sub>](https://taylorbryant.blog)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=taylorbryant "Documentation") | [<img src="https://avatars3.githubusercontent.com/u/5881826?v=4" width="100px;"/><br /><sub><b>kvanerkelens</b></sub>](https://github.com/kvanerkelens)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=kvanerkelens "Documentation") | [<img src="https://avatars1.githubusercontent.com/u/8291663?v=4" width="100px;"/><br /><sub><b>Patrick Sier</b></sub>](https://patsier.com/)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=pjsier "Code") | [<img src="https://avatars2.githubusercontent.com/u/6132191?v=4" width="100px;"/><br /><sub><b>Christian Nolte</b></sub>](http://noltech.net)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=drlogout "Code") |
 | [<img src="https://avatars1.githubusercontent.com/u/3818?v=4" width="100px;"/><br /><sub><b>Edward Betts</b></sub>](http://edwardbetts.com/)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=EdwardBetts "Documentation") | [<img src="https://avatars1.githubusercontent.com/u/8771435?v=4" width="100px;"/><br /><sub><b>Josh Hardman</b></sub>](https://github.com/jhardman0830)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=jhardman0830 "Documentation") | [<img src="https://avatars0.githubusercontent.com/u/11616378?v=4" width="100px;"/><br /><sub><b>Mantas</b></sub>](https://behance.net/mistermantas)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=mistermantas "Documentation") | [<img src="https://avatars0.githubusercontent.com/u/5244986?v=4" width="100px;"/><br /><sub><b>Marco Biedermann</b></sub>](https://www.marcobiedermann.com)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=marcobiedermann "Documentation") | [<img src="https://avatars0.githubusercontent.com/u/7525670?v=4" width="100px;"/><br /><sub><b>Max Stoiber</b></sub>](https://mxstbr.blog/newsletter)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=mxstbr "Documentation") | [<img src="https://avatars0.githubusercontent.com/u/89368?v=4" width="100px;"/><br /><sub><b>Vyacheslav Matyukhin</b></sub>](http://berekuk.ru)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=berekuk "Documentation") | [<img src="https://avatars1.githubusercontent.com/u/9059048?v=4" width="100px;"/><br /><sub><b>jimmaaay</b></sub>](https://jimmythompson.me)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=jimmaaay "Code") |
-| [<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") | [<img src="https://avatars0.githubusercontent.com/u/36023898?v=4" width="100px;"/><br /><sub><b>Eko Eryanto</b></sub>](https://github.com/ekoeryanto)<br />[🔌](#plugin-ekoeryanto "Plugin/utility libraries") |

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 +77,14 @@ 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](/docs/configuration-options/#publish-mode) with the `github` or `git-gateway` backends, Netlify CMS creates a pull request for each unpublished entry. Every time the unpublished entry is changed and saved, a new commit is added to the pull request. When the entry is published, the pull request is merged, and all of those commits are added to your project commit history in a merge commit.
+
+The squash merge option causes all commits to be "squashed" into a single commit when the pull request is merged, and the resulting commit is rebased onto the target branch, avoiding the merge commit altogether.
+
+To enable this feature, you can set the following option in your `config.yml`:
+
+```yaml
+backend:
+  squash_merges: true
+```