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+## Definition
+
+A release is mostly a git tag of http://github.com/wallabag/wallabag, following [semantic versioning](http://semver.org).
+The last release at the time of writing is 2.0.0-alpha.2, from the v2 branch.
+
+### Steps to release
+
+During this documentation, we assume the release is `release-2.0.0-beta.1`.
+
+#### Files to edit
+
+- `app/config/config.yml` (`wallabag_core.version`)
+- `README.md` (`composer create-project` command)
+- `docs/en/user/installation.rst` and its translations (`composer create-project` command)
+
+#### Create release on GitHub
+
+- Run these commands to create the tag:
+
+```
+    git checkout v2
+    git pull origin v2
+    git checkout -b release-2.0.0-beta.1
+    SYMFONY_ENV=prod composer up --no-dev
+    git add --force composer.lock
+    git add README.md
+    git commit -m "Release wallabag 2.0.0-beta.1"
+    git push origin release-2.0.0-beta.1
+```
+
+- Create a new pull request with this title `DON'T MERGE Release wallabag 2.0.0-beta.1`. This pull request is used to launch builds on Travis-CI.
+- Run these commands to create the package:
+
+```
+    git clone git@github.com:wallabag/wallabag.git -b release-2.0.0-beta.1 release-2.0.0-beta.1
+    SYMFONY_ENV=prod composer up -d=release-2.0.0-beta.1 --no-dev
+    tar czf wallabag-release-2.0.0-beta.1.tar.gz --exclude="var/*" --exclude=".git" release-2.0.0-beta.1
+```
+
+- [Create the new release on GitHub](https://github.com/wallabag/wallabag/releases/new). You have to upload on this page the package.
+- Delete the `release-2.0.0-beta.1` branch and close the pull request (**DO NOT MERGE IT**).
+- Update the URL shortener (used on `wllbg.org` to generate links like `http://wllbg.org/latest-v2-package` or `http://wllbg.org/latest-v2`)
+- Update [the downloads page](https://github.com/wallabag/wallabag.org/blob/master/content/pages/download.md) on the website (MD5 sum, release date)
+- Drink a beer!
+
+### `composer.lock`
+A release tag must contain a `composer.lock` file. It sets which dependencies were available at the time a release was done,
+making it easier to fix issues after the release. It also speeds up `composer install` on stable versions a LOT, by skipping the
+dependencies resolution part.
+
+Since `composer.lock` is ignored by default, either it must be removed from `.gitignore` _in the release branch_,
+or it must be added using `git add --force composer.lock`.
+
+### Target PHP version
+`composer.lock` is _always_ built for a particular version, by default the one it is generated (with `composer update`).
+
+If the PHP version used to generate the .lock isn't a widely available one (like PHP 7), a more common one should
+be locally specified in `composer.lock`:
+
+```json
+    "config": {
+        "platform": {
+            "php": "5.5.9",
+            "ext-something": "4.0"
+        }
+    }
+```