Refactor the upgrading from source docsdocs/refactor-update-guides

Instead of requiring one separate document for every version (which is
created by release managers), we now use a single document for both
Community Edition and Enterprise Edition. This allows developers to add
guidelines right away, instead of release managers having to determine
what to add.

Version specific upgrading instructions are placed in a separate
section. This prevents instructions from lingering around for many
versions should a developer forget to remove them. This also ensures
that all instructions are kept in a single place, instead of being
spread across different documents.

A minor downside is that CE and EE guidelines now live in the same
document, which could cause merge conflicts. Since we are working
towards a single codebase, this should only be an issue until we merge
the codebases together; something we expect to do in the coming months.

This commit also removes all old upgrading instructions, but these can
still be accessed using Git branch specific URLs (included in the
updating README).

1 files changed, 2 insertions, 117 deletions

diff --git a/doc/update/5.1-to-5.4.md b/doc/update/5.1-to-5.4.md
index 5767c9cc121..8514aa13f48 100644
--- a/doc/update/5.1-to-5.4.md
+++ b/doc/update/5.1-to-5.4.md
@@ -1,120 +1,5 @@
 ---
-comments: false
+redirect_to: upgrading_from_source.md
 ---
 
-# From 5.1 to 5.4
-*Make sure you view this [upgrade guide from the `master` branch](https://gitlab.com/gitlab-org/gitlab-ce/tree/master/doc/update/5.1-to-5.4.md) for the most up to date instructions.*
-
-Also works starting from 5.2.
-
-## 0. Backup
-
-It's useful to make a backup just in case things go south (with MySQL, this may require granting "LOCK TABLES" privileges to the GitLab user on the database version):
-
-```bash
-cd /home/git/gitlab
-sudo -u git -H bundle exec rake gitlab:backup:create RAILS_ENV=production
-```
-
-## 1. Stop server
-
-    sudo service gitlab stop
-
-## 2. Get latest code
-
-```bash
-cd /home/git/gitlab
-sudo -u git -H git fetch
-sudo -u git -H git checkout 5-4-stable # Latest version of 5-4-stable addresses CVE-2013-4489
-```
-
-## 3. Update gitlab-shell
-
-```bash
-cd /home/git/gitlab-shell
-sudo -u git -H git fetch
-sudo -u git -H git checkout v1.7.9 # Addresses multiple critical security vulnerabilities
-```
-
-## 4. Install libs, migrations, etc.
-
-```bash
-cd /home/git/gitlab
-
-# The Modernizr gem was yanked from RubyGems. It is required for GitLab >= 2.8.0
-# Edit `Gemfile` and change `gem "modernizr", "2.5.3"` to
-# `gem "modernizr-rails", "2.7.1"``
-sudo -u git -H vim Gemfile
-
-# MySQL
-
-# Run a bundle install without deployment to generate the new Gemfile
-sudo -u git -H bundle install --without development test postgres --no-deployment
-
-# Install libs (with deployment this time)
-sudo -u git -H bundle install --without development test postgres --deployment
-
-# PostgreSQL
-
-# Run a bundle install without deployment to generate the new Gemfile
-sudo -u git -H bundle install --without development test mysql --no-deployment
-
-# Install libs (with deployment this time)
-sudo -u git -H bundle install --without development test mysql --deployment
-
-# Both MySQL and PostgreSQL
-sudo -u git -H bundle exec rake db:migrate RAILS_ENV=production
-
-sudo -u git -H bundle exec rake assets:precompile RAILS_ENV=production
-```
-
-## 5. Update config files
-
-- Make `/home/git/gitlab/config/gitlab.yml` same as <https://gitlab.com/gitlab-org/gitlab-ce/blob/5-4-stable/config/gitlab.yml.example> but with your settings.
-- Make `/home/git/gitlab/config/puma.rb` same as <https://gitlab.com/gitlab-org/gitlab-ce/blob/5-4-stable/config/puma.rb.example> but with your settings.
-
-## 6. Update Init script
-
-```bash
-sudo rm /etc/init.d/gitlab
-sudo cp lib/support/init.d/gitlab /etc/init.d/gitlab
-sudo chmod +x /etc/init.d/gitlab
-```
-
-## 7. Create uploads directory
-
-```bash
-cd /home/git/gitlab
-sudo -u git -H mkdir public/uploads
-sudo chmod -R u+rwX  public/uploads
-```
-
-## 8. Start application
-
-    sudo service gitlab start
-    sudo service nginx restart
-
-## 9. Check application status
-
-Check if GitLab and its environment are configured correctly:
-
-    sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production
-
-To make sure you didn't miss anything run a more thorough check with:
-
-    sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production
-
-If all items are green, then congratulations upgrade complete!
-
-## Things went south? Revert to previous version (5.3)
-
-### 1. Revert the code to the previous version
-
-Follow the [upgrade guide from 5.2 to 5.3](5.2-to-5.3.md), except for the database migration (the backup is already migrated to the previous version).
-
-### 2. Restore from the backup:
-
-```bash
-cd /home/git/gitlab
-sudo -u git -H bundle exec rake gitlab:backup:restore RAILS_ENV=production
-```
+This document was moved to [another location](upgrading_from_source.md).