I am working on RDP having Ubuntu 14.04 and trying to install ocaml.
I am trying to update my ocaml compiler to 4.05.0 or above but opam switch list gives only one compiler system C system System compiler (4.01.0). Also my opam update gives me below log.
[ERROR] Your version of OPAM (1.1.1) is not recent enough to read ~/.opam/repo/default/repo. Upgrade OPAM to a more recent version (at least 2.0) to read this file correctly.
[ERROR] Skipping https://opam.ocaml.org as the repository is not available.
Updating ~/.opam/repo/compiler-index ...
Updating ~/.opam/compilers/ ...
Updating ~/.opam/repo/package-index ...
Updating ~/.opam/packages/ ...
Updating the cache of metadata (~/.opam/state.cache) ...
Everything is up-to-date.
Any idea how to do this? Thanks for help in advance.
UPDATE: I need to install newer opam version separately using binary distribution. with this
sh <(curl -sL https://raw.githubusercontent.com/ocaml/opam/master/shell/install.sh)
command I can install it but it will prompt me where to install it, but I have to automate installation so that there is no interaction from user side. Is there a way to do it?
UPDATE 2:
found a way to do it using ppa see my answer.
I tried using sh <(curl -sL https://raw.githubusercontent.com/ocaml/opam/master/shell/install.sh) but failed in doing it as non-interactive script.
I have found this method which does work, though using Ubuntu 14.04 adding ppa sudo add-apt-repository ppa:avsm/ppa and then doing update, upgrade, dist-upgrade and finally installation of opam will be of version 2.2 (latest as by ppa). Follow below commands for exact procedure.
add-apt-repository ppa:avsm/ppa
apt-get update -y
apt-get upgrade -y
apt-get dist-upgrade -y
apt-get install curl build-essential m4 zlib1g-dev libssl-dev ocaml ocaml-native-compilers opam -y
opam init --disable-sandboxing -y
eval `opam config env`
opam update
opam switch list-available
opam switch create 4.07.0
opam init -y
eval `opam config env`
After this Everything should be latest as of now.