Rails Migrations Post Merge Git Commit Hook

Rails Migrations Post Merge Git Commit Hook

Get notifications when there are migrations that need to be run in a Rails project:

https://img.skitch.com/20110418-c9y3ttap3tai7frc43f38qtb8e.jpg

In your Rails project edit the .git/config file to add the following:

    [rails]
      automigrate = false
      automigrateforegroundcolor = yellow
      automigratebackgroundcolor = black
      automigrateblink = false

Supported colors are black, red, green, yellow, blue, magenta, cyan, white

In your Rails project, create a file in the .git/hooks directory named post-merge

      touch ~/path_to_your_project/.git/post-merge

Edit that file and paste the following:

    #!/usr/bin/env ruby

    def set_color(color, default = 0)
      case color.downcase.gsub("\n", '')
        when /\d/ : color
        when 'black' then '0'
        when 'red' then '1'
        when 'green' then '2'
        when 'yellow' then '3'
        when 'blue' then '4'
        when 'magenta' then '5'
        when 'cyan' then '6'
        when 'white' then '7'
        else
          default
      end
    end

    automigrate = `git config rails.automigrate`.index('true')
    migratable = `git diff HEAD^`.index("db/migrate")
    fg_color = set_color(`git config rails.automigrateforegroundcolor`, 7)
    bg_color = set_color(`git config rails.automigratebackgroundcolor`, 0)
    blink = (`git config rails.automigrateblink`.index('true')) ? 5 : 0

    if migratable
      if automigrate
        puts "\e[#{blink};1;3#{fg_color};4#{bg_color}mMigrating Database... Please wait.\e[0m"
        `rake db:migrate && rake db:test:prepare`
        puts "\e[#{blink};1;3#{fg_color};4#{bg_color}mDone migrating database.\e[0m"
      else
        puts "\e[#{blink};1;3#{fg_color};4#{bg_color}mThere are pending migrations.\e[0m"
      end
    end

Save the file and make it executable:

    chmod 755 ~/path_to_your_rails_project/.git/post-merge