Upgrade minimum version of ruby to 2.5

This prepares the way for gems that depend on newer ruby, and also
prepares for the rails 6 upgrade.

diff --git a/.travis.yml b/.travis.yml
index 3b56d2b4b666af3b77fb9df25838a6259b0def03..dc22bb8835151637aba976069148cf1ab0743c33 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 sudo: false
 language: ruby
 rvm:
-  - 2.3.3
+  - 2.5.3
 cache: bundler
 addons:
   postgresql: 9.5

diff --git a/INSTALL.md b/INSTALL.md
index 8e47cb2667473bac991125e237138ac39e0d457f..b1fb1eafb822ab0a3a8a453c616d276da76e2e39 100644 (file)
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -5,7 +5,7 @@ If you want to deploy the software for your own project, then see the notes at t
 
 You can install the software directly on your machine, which is the traditional and probably best-supported approach. However, there is an alternative which may be easier: Vagrant. This installs the software into a virtual machine, which makes it easier to get a consistent development environment and may avoid installation difficulties. For Vagrant instructions, see [VAGRANT.md](VAGRANT.md).
 
-These instructions are based on Ubuntu 16.04 LTS, which is the platform used by the OSMF servers.
+These instructions are based on Ubuntu 18.04 LTS, which is the platform used by the OSMF servers.
 The instructions also work, with only minor amendments, for all other current Ubuntu releases, Fedora and MacOSX
 
 We don't recommend attempting to develop or deploy this software on Windows. If you need to use Windows, then try developing this software using Ubuntu in a virtual machine, or use [Vagrant](VAGRANT.md).
@@ -18,8 +18,7 @@ of packages required before you can get the various gems installed.
 
 ## Minimum requirements
 
-* Ruby 2.3
-* RubyGems 1.3.1+
+* Ruby 2.5+
 * PostgreSQL 9.1+
 * ImageMagick
 * Bundler
@@ -28,12 +27,12 @@ of packages required before you can get the various gems installed.
 These can be installed on Ubuntu 16.04 or later with:
 
 ```
-sudo apt-get install ruby2.3 libruby2.3 ruby2.3-dev \
+sudo apt-get install ruby2.5 libruby2.5 ruby2.5-dev \
                      libmagickwand-dev libxml2-dev libxslt1-dev nodejs \
                      apache2 apache2-dev build-essential git-core \
                      postgresql postgresql-contrib libpq-dev postgresql-server-dev-all \
                      libsasl2-dev imagemagick libffi-dev
-sudo gem2.3 install bundler
+sudo gem2.5 install bundler
 ```
 
 ### Alternative platforms