如何在 Heroku 上安裝 Redmine (3.x.x)¶

參考以下文章：

• https://stackoverflow.com/questions/39261996/heroku-and-rails-gem-load-error-with-postgres-however-it-is-specified-in-gemfi
• https://medium.com/mozaix-llc/how-to-deploy-redmine-to-heroku-41684d888b05

首先，將 Redmine 穩定版本原始碼使用 git clone 下載

git clone https://github.com/redmine/redmine.git -b 3.4-stable

並移動到 Redmine 專案目錄

cd redmine

編輯 .gitignore 檔案，並刪除以下幾行

Gemfile.lock
Gemfile.local
public/plugin_assets 
config/initializers/session_store.rb 
config/initializers/secret_token.rb 
config/configuration.yml 
config/email.yml

編輯 Gemfile，移除或註解掉以下區塊

database_file = File.join(File.dirname(__FILE__), "config/database.yml")
 if File.exist?(database_file)
   database_config = YAML::load(ERB.new(IO.read(database_file)).result)
   adapters = database_config.values.map {|c| c['adapter']}.compact.uniq
   if adapters.any?
     adapters.each do |adapter|
       case adapter
       when 'mysql2'
         gem "mysql2", "~> 0.4.6", :platforms => [:mri, :mingw, :x64_mingw]
       when /postgresql/
         gem "pg", "~> 0.18.1", :platforms => [:mri, :mingw, :x64_mingw]
       when /sqlite3/
         gem "sqlite3", (RUBY_VERSION < "2.0" && RUBY_PLATFORM =~ /mingw/ ? "1.3.12" : "~>1.3.12"),
                        :platforms => [:mri, :mingw, :x64_mingw]
       when /sqlserver/
         gem "tiny_tds", (RUBY_VERSION >= "2.0" ? "~> 1.0.5" : "~> 0.7.0"), :platforms => [:mri, :mingw, :x64_mingw]
         gem "activerecord-sqlserver-adapter", :platforms => [:mri, :mingw, :x64_mingw]
       else
         warn("Unknown database adapter `#{adapter}` found in config/database.yml, use Gemfile.local to load your own database gems")
       end
     end
   else
    warn("No adapter found in config/database.yml, please configure it first")
   end
 else
  warn("Please configure your config/database.yml first")
 end

並新增以下區塊

group :production do
  gem 'pg', '~> 0.20'
end

使用 bundle install 安裝 gem

bundle install

使用以下指令取得密鑰

rake generate_secret_token 

在 config/environment.rb 中編輯為 "exit 1"（移除或註解掉）

 exit 1

在 config/application.rb 中新增以下幾行

config.assets.initialize_on_precompile = false

建立 Heroku 應用程式

heroku apps:create -a APP_NAME

新增 PostgreSQL 附加元件

heroku addons:create heroku-postgresql 

連結到遠端（Heroku）

heroku git:remote -a APP_NAME

使用以下指令部署到 Heroku

git add -A
git commit -m “Redmine for Heroku deployment”
git push heroku 3.4-stable:master

最後，進行遷移並載入預設資料

heroku run rake db:migrate
heroku run rake redmine:load_default_data