OPAM is a source-based package manager for OCaml. It supports multiple simultaneous compiler installations, flexible package constraints, and a Git-friendly development workflow.

• Version: 1.2.0
• Added: November, 2014
• Link: https://opam.ocaml.org/

• Show all available versions of opam

  module avail opam

• Load opam module:

  module load opam/1.2.0

• get quick help:

  man opam

• Clone opam git repo, compile & install it to /export/apps/

  git clone https://github.com/ocaml/opam.git
  cd opam
  sudo mkdir -p /export/apps/opam/1.2.0/
  sudo chown -R joguya:joguya /export/apps/opam/1.2.0/
  git checkout rebuild
  ./configure --prefix=/export/apps/opam/1.2.0/
  make lib-ext
  make
  make install
  sudo chown -R root:root /export/apps/opam/1.2.0/

• opam module file

  #%Module1.0
  #####################################################################
  ##
  ## Opam Modulefile
  ## By James Oguya, j.oguya@cgiar.org
  ## November, 2014
  ##
  
  set appname         opam
  set version         1.2.0
  set prefix          /export/apps/${appname}/${version}
  set exec_prefix     ${prefix}/bin
  set url "https://opam.ocaml.org/"
  set msg "OPAM is a source-based package manager for OCaml. It supports multiple simultaneous compiler installations, flexible package constraints, and a Git-friendly development workflow.\nOpam Official Site: $url\n"
  
  module-whatis $msg
  
  proc ModulesHelp { } {
      puts stderr "$msg"
  }
  
  conflict        opam
  
  prepend-path    PATH    ${exec_prefix}
  
  # opam depends on ocaml module
  if { ![is-loaded ocaml] } {
      module load ocaml
  }

• deploy the new module using ansible

  ansible-playbook site.yml -u joguya -K -s --limit=compute --tags=module