- hosts: guests
  become: true
  tasks:
    - name: Start fresh
      shell: rm -rf /root/m-queens

    - name: Update code base
      copy:
        src: /root/benchmark-testing/m-queens
        dest: /root/
        
    - name: Check if already compiled
      stat: 
        path: /root/m-queens/m-queens-multithread.bin
      register: result
      
    - name: Compile in directory if not compiled
      shell: chdir=/root/m-queens make
      when: result.stat.exists == false

    - name: Verify compilation succeeded
      stat:
        path: /root/m-queens/m-queens-multithread.bin
      register: compiled

    - name: chmod 750 to the executables
      file:
        path: /root/m-queens/m-queens-multithread.bin
        mode: '0750'
      when: compiled.stat.exists == true

    - name: Run multithreaded benchmark
      shell: chdir=/root/m-queens ./m-queens-multithread.bin 19 > result.txt
      when: compiled.stat.exists == true

    - name: Wait for results
      wait_for:
        path: /root/m-queens/result.txt
      
    - name: Register if results available
      stat:
        path: /root/m-queens/result.txt
      register: output

    - name: Fetch results if available 
      ansible.builtin.fetch:
        src: /root/m-queens/result.txt
        dest: ./results/
      when: output.stat.exists == true