Virtualization - OVA/OVF - ESXi Support/Extended OVA Customization

2

Update:
Now that cot has been merged, we can replace the command that modifies the VirtualSystemType with a much more succinct cot invocation:

Before:

  pkgs.runCommand "fix-esxi-image" {}
   ''
      mkdir $out
      tar -xvf ${vboxImage}/*.ova

      ovf=$(ls -1 *.ovf)
      mf=$(ls -1 *.mf)
      vmdk=$(ls -1 *.vmdk)

      sed 's;\(.*<vssd:VirtualSystemType>\).*\(</vssd:VirtualSystemType>\);\1${vmx-14}\2;;' -i nixos-20.09pre-git-x86_64-linux.ovf
      sum=$(sha1sum $ovf | cut -d ' ' -f-1)
      substituteInPlace $mf --replace "SHA1 ($ovf) = .*" "SHA1 ($ovf) = $sum"
      tar -cvf nixos.ova $ovf $mf $vmdk
      cp nixos.ova $out
  '';

After:

 pkgs.runCommand "fix-esxi-image" { }
  ''
    ova=${vboxImage}/*.ova
    mkdir $out
    ${pkgs.cot}/bin/cot edit-hardware $ova -v ${vmx} -o $out/nixos.ova
  '';
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