master is the new default branch

`master` is now the only permanent branch. Features and fixes should be merged
into `master` when stable. Pull requests should be forked from `master`.

`develop` branch disappear entirely in favor of temporary features/fixes branches.

.travis.yml

@@ -56,4 +56,4 @@ jobs:
         github-token: $GITHUB_TOKEN
         on:
           all_branches: true
-          condition: $TRAVIS_BRANCH =~ ^master|develop$
+          condition: $TRAVIS_BRANCH =~ ^master$

CHANGELOG.md

@@ -28,6 +28,10 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 - Fix time format for duration is incorrect - [#666](https://github.com/PHPOffice/PhpSpreadsheet/pull/666)
 - Fix iconv unsupported `//IGNORE//TRANSLIT` on IBM i - [#791](https://github.com/PHPOffice/PhpSpreadsheet/issues/791)
 
+### Changed
+
+- `master` is the new default branch, `develop` does not exist anymore
+
 ## [1.5.2] - 2018-11-25
 
 ### Security

CONTRIBUTING.md

@@ -2,9 +2,9 @@
 
 If you would like to contribute, here are some notes and guidelines:
 
- - All new development happens on feature/fix branches referenced with the GitHub issue number, and are then merged to the develop branch; so the develop branch is always the most up-to-date, working code
- - The master branch only contains tagged releases
- - If you are going to be submitting a pull request, please fork from develop, and submit your pull request back as a fix/feature branch referencing the GitHub issue number
+ - All new development happens on feature/fix branches, and are then merged to the `master` branch once stable; so the `master` branch is always the most up-to-date, working code
+ - Tagged releases are made from the `master` branch
+ - If you are going to be submitting a pull request, please fork from `master`, and submit your pull request back as a fix/feature branch referencing the GitHub issue number
  - Code style might be automatically fixed by `composer fix`
  - All code changes must be validated by `composer check`
  - [Helpful article about forking](https://help.github.com/articles/fork-a-repo/ "Forking a GitHub repository")

README.md

@@ -1,6 +1,5 @@
 # PhpSpreadsheet
 
-Master:
 [![Build Status](https://travis-ci.org/PHPOffice/PhpSpreadsheet.svg?branch=master)](https://travis-ci.org/PHPOffice/PhpSpreadsheet)
 [![Code Quality](https://scrutinizer-ci.com/g/PHPOffice/PhpSpreadsheet/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/PHPOffice/PhpSpreadsheet/?branch=master)
 [![Code Coverage](https://scrutinizer-ci.com/g/PHPOffice/PhpSpreadsheet/badges/coverage.png?b=master)](https://scrutinizer-ci.com/g/PHPOffice/PhpSpreadsheet/?branch=master)
@@ -9,11 +8,6 @@ Master:
 [![License](https://poser.pugx.org/phpoffice/phpspreadsheet/license.png)](https://packagist.org/packages/phpoffice/phpspreadsheet)
 [![Join the chat at https://gitter.im/PHPOffice/PhpSpreadsheet](https://img.shields.io/badge/GITTER-join%20chat-green.svg)](https://gitter.im/PHPOffice/PhpSpreadsheet)
 
-Develop:
-[![Build Status](https://travis-ci.org/PHPOffice/PhpSpreadsheet.png?branch=develop)](https://travis-ci.org/PHPOffice/PhpSpreadsheet)
-[![Code Quality](https://scrutinizer-ci.com/g/PHPOffice/PhpSpreadsheet/badges/quality-score.png?b=develop)](https://scrutinizer-ci.com/g/PHPOffice/PhpSpreadsheet/?branch=develop)
-[![Code Coverage](https://scrutinizer-ci.com/g/PHPOffice/PhpSpreadsheet/badges/coverage.png?b=develop)](https://scrutinizer-ci.com/g/PHPOffice/PhpSpreadsheet/?branch=develop)
-
 PhpSpreadsheet is a library written in pure PHP and providing a set of classes that allow you to read from and to write to different spreadsheet file formats, like Excel and LibreOffice Calc.
 
 ## Documentation
@@ -26,7 +20,7 @@ Please ask your support questions on [StackOverflow](https://stackoverflow.com/q
 
 PhpSpreadsheet is the next version of PHPExcel. It breaks compatibility to dramatically improve the code base quality (namespaces, PSR compliance, use of latest PHP language features, etc.).
 
-Because all efforts have shifted to PhpSpreadsheet, PHPExcel will no longer be maintained. All contributions for PHPExcel, patches and new features, should target PhpSpreadsheet develop branch.
+Because all efforts have shifted to PhpSpreadsheet, PHPExcel will no longer be maintained. All contributions for PHPExcel, patches and new features, should target PhpSpreadsheet `master` branch.
 
 ## License
 

docs/index.md

@@ -44,9 +44,6 @@ Use [composer](https://getcomposer.org) to install PhpSpreadsheet into your proj
 composer require phpoffice/phpspreadsheet
 ```
 
-**Note:** If you want the unreleased, unstable development version use
-`phpoffice/phpspreadsheet:dev-develop` instead.
-
 ## Hello World
 
 This would be the simplest way to write a spreadsheet:

mkdocs.yml

@@ -1,6 +1,6 @@
 site_name: PhpSpreadsheet Documentation
 repo_url: https://github.com/PHPOffice/phpspreadsheet
-edit_uri: edit/develop/docs/
+edit_uri: edit/master/docs/
 
 theme: readthedocs
 extra_css: