Capistrano 3 task for prompting for git tag or branch

[Dave Hamilton]

I wrote this task to prompt for a git branch or tag to deploy. I'm pretty new to RoR and Capistrano so I'd welcome any critique. And, maybe this will be useful for others.

I have this at the end of my Capfile:

Dir.glob('lib/capistrano/tasks/*.rake').each { |r| import r }

I put this in file lib/capistrano/tasks/git_tasks.rake

desc "Prompt for branch or tag"
task git_branch_or_tag: :'git:wrapper' do
  on roles(:all) do |host|

    tags = "<none>"
    within repo_path do
      with fetch(:git_environmental_variables) do
        tags = capture(:git, :tag).split.join(', ')
      end
    end

    run_locally do
      tag_prompt = "Enter a branch or tag name to deploy, available tags include #{tags}"

      ask(:branch_or_tag, tag_prompt)
      tag_branch_target = fetch(:branch_or_tag)

      execute "echo \"About to deploy branch or tag '#{tag_branch_target}'\""
      set(:branch, tag_branch_target)
    end

  end
end

before 'deploy:starting', :git_branch_or_tag

Dave

[Lee Hambley]

Looks good Dave!

Sent from my Nexus 4.

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[Andreas Wenk]

I tried this in Capistrano 3.3.3 but after I added the tag number, it stopped and did not run further. 

def tag_branch_target
  tags = `git tag`.split("\n")
  tag_prompt = "\nlast tags available are #{tags.reverse[(0..5)]}"
  ask :branch_or_tag, tag_prompt
  tag = fetch(:branch_or_tag)
  tag.match(/^\d/).nil? ? tags.last : tag
end


set :branch, proc { tag_branch_target }

It looks sth like:

NFO[edfd8380] Running /usr/bin/env chmod +x /tmp/ace/git-ssh.sh on 10.10.82.31
DEBUG[edfd8380] Command: /usr/bin/env chmod +x /tmp/ace/git-ssh.sh
INFO[6d1eea4e] Finished in 0.168 seconds with exit status 0 (successful).
INFO[edfd8380] Finished in 0.164 seconds with exit status 0 (successful).
Please enter branch_or_tag (
last tags available are ["0.9.1", "0.9.0", "0.8.0", "0.7.9", "0.7.8", "0.7.7"]):

if no tag is given, that last one is used. I really like the idea to put that into a capistrano rake task so if I find time I will work on it.