ocaml-install.sh

#!/bin/bash

OPAM_VERSION="1.2.2"
OCAML_VERSION="4.04.0"
BASE=/home/archive/ocaml-${OCAML_VERSION}

ARCH=$(uname -m)
OS=$(uname -s)

INSTALL_ROOT=${BASE}/root        # generally this value is "$HOME/.opam"
INSTALL_LOCAL=${BASE}/local
BINDIR=${INSTALL_LOCAL}/bin

mkdir -p ${INSTALL_ROOT}
mkdir -p ${BINDIR}

curl -s -L \
    -o ${BINDIR}/opam \
    "https://github.com/ocaml/opam/releases/download/${OPAM_VERSION}/opam-${OPAM_VERSION}-${ARCH}-${OS}"

chmod 0755 ${BINDIR}/opam

${BINDIR}/opam init \
    --root ${INSTALL_ROOT} \
    --comp ${OCAML_VERSION}

# in ~/.bashrc i had to add the following lines:

# # opam config env --root $OPAMROOT
# export OPAMROOT=/home/archive/ocaml-4.04.0/root
# export PATH=/home/archive/ocaml-4.04.0/local/bin:$PATH
# source /home/archive/ocaml-4.04.0/root/opam-init/init.sh > /dev/null 2> /dev/null || true