Replace DB environment variable with optional bundler groups

See the changes to the changelog for more details

.travis.yml

@@ -5,9 +5,9 @@ rvm:
   - 2.1
 
 env:
-  - DB=postgres BUILD_TYPE=other
+  - DB=postgresql BUILD_TYPE=other
   - DB=mysql BUILD_TYPE=other
-  - DB=postgres BUILD_TYPE=cucumber
+  - DB=postgresql BUILD_TYPE=cucumber
   - DB=mysql BUILD_TYPE=cucumber
 
 sudo: false
@@ -23,7 +23,7 @@ branches:
     - 'develop'
 
 before_install: gem install bundler
-bundler_args: "--without development production heroku --jobs 3 --retry 3"
+bundler_args: "--deployment --without development production --with mysql postgresql --jobs 3 --retry 3"
 
 script: "./script/ci/build.sh"
 

Changelog.md

 # 0.6.0.0
 
+## The DB environment variable is gone
+
+With Bundler 1.10 supporting optional groups, we removed the DB environment variable. When updating to this release, please update
+bundler and select the database support you want:
+
+```sh
+gem install bundler
+bundle install --with mysql # For MySQL and MariaDB
+bundle install --with postgresql # For PostgreSQL
+```
+
+For production setups we now additionally recommend adding the `--deployment` flag.
+If you set the DB environment variable anywhere, that's no longer necessary.
+
 ## Supported Ruby versions
 
 This release recommends using Ruby 2.2, while retaining Ruby 2.1 as an officially supported version.

Gemfile

@@ -60,10 +60,12 @@ gem "autoprefixer-rails", "5.1.11"
 
 # Database
 
-ENV["DB"] ||= "mysql"
-
-gem "mysql2", "0.3.18" if ENV["DB"] == "all" || ENV["DB"] == "mysql"
-gem "pg",     "0.18.1" if ENV["DB"] == "all" || ENV["DB"] == "postgres"
+group :mysql, optional: true do
+  gem "mysql2", "0.3.18"
+end
+group :postgresql, optional: true do
+  gem "pg",     "0.18.1"
+end
 
 gem "activerecord-import", "0.7.0"
 

Gemfile.lock

@@ -463,6 +463,7 @@ GEM
     orm_adapter (0.5.0)
     parser (2.2.2.2)
       ast (>= 1.1, < 3.0)
+    pg (0.18.1)
     phantomjs (1.9.8.0)
     powerpack (0.1.1)
     pry (0.10.1)
@@ -785,6 +786,7 @@ DEPENDENCIES
   omniauth-twitter (= 1.0.1)
   omniauth-wordpress (= 0.2.1)
   open_graph_reader (= 0.6.1)
+  pg (= 0.18.1)
   pry
   pry-byebug
   pry-debundle
@@ -850,3 +852,6 @@ DEPENDENCIES
   uuid (= 2.3.7)
   webmock (= 1.21.0)
   will_paginate (= 3.0.7)
+
+BUNDLED WITH
+   1.10.0

config/database.yml.example

+postgresql: &postgresql
+  adapter: postgresql
+  host: localhost
+  port: 5432
+  username: postgres
+  password:
+  encoding: unicode
+
 mysql: &mysql
   adapter: mysql2
   host: "localhost"
@@ -8,20 +16,13 @@ mysql: &mysql
   encoding: utf8mb4
   collation: utf8mb4_bin
 
-postgres: &postgres
-  adapter: postgresql
-  host: localhost
-  port: 5432
-  username: postgres
-  password:
-  encoding: unicode
 
 # Comment the the mysql line and uncomment the postgres line
 # if you want to use postgres
 common: &common
   # Choose one of the following
-  <<: *mysql
-  #<<: *postgres
+  <<: *postgresql
+  #<<: *mysql
 
   # Should match environment.sidekiq.concurrency
   #pool: 25
@@ -32,9 +33,6 @@ common: &common
 
 # Normally you don't need to touch anything here
 
-postgres_travis: &postgres_travis
-  adapter: postgresql
-  username: postgres
 combined: &combined
   <<: *common
 development:

config/eye.rb

@@ -7,7 +7,7 @@ end
 
 Eye.application("diaspora") do
   working_dir Rails.root.to_s
-  env "DB" => ENV["DB"], "RAILS_ENV" => rails_env
+  env "RAILS_ENV" => rails_env
   stdout "log/eye_processes_stdout.log" unless rails_env == "development"
   stderr "log/eye_processes_stderr.log"
 

script/ci/build.sh

@@ -4,8 +4,8 @@
 # Create a database.yml for the right database
 echo "Setting up database.yml for $DB"
 cp config/database.yml.example config/database.yml
-if [ "$DB" = "postgres" ]; then
-  sed -i 's/*common/*postgres_travis/' config/database.yml
+if [ "$DB" = "mysql" ]; then
+  sed -i 's/*common/*mysql/' config/database.yml
 fi
 
 command="bundle exec rake --trace ci:travis:${BUILD_TYPE}"

script/server

@@ -113,11 +113,6 @@ vars=$(bin/bundle exec ruby ./script/get_config.rb \
 on_failure "Couldn't parse config/diaspora.yml!"
 eval "$vars"
 
-if [ -n "$DB" ]
-then
-  export DB
-fi
-
 args="$@"
 for arg in $(echo $args | awk '{ for (i = 1; i <= NF; i++) print $i}')
 do