Example of function function to create a custom session in iterm2 using applescript syntax.

.zshrc

# Add this function to create a custom session in iterm2 using applescript

iterm-custom-session () {
  osascript -e 'tell application "iTerm"
    (* set the project path. You can add a bash variable too for more felxibility *)
    set projectPath to "your_project_path"
    select first window
    tell the current window
      (* Split first session in two and enter in the project path *)
      activate current session
      tell the current session
        write text "cd " & projectPath
        split vertically with default profile
      end tell

      (* cd to rails directory and start console in the second session and aplit it horizontally *)
      tell second session of current tab
        write text "cd " & projectPath
        write text "rails c"
        split horizontally with default profile
      end tell

      (* Select the third session and track the log file *)
      tell third session of current tab
        write text "cd " & projectPath
        write text "tail -f log/development.log"
      end tell

      (* Open a new tab and start a rails server for the project *)
      set newTab to (create tab with default profile)
      select last tab
      tell the current session
        write text "cd " & projectPath
        write text "rails s;"
      end tell
    end tell
  end tell'
}