kerl, rebar3

installation kerl rebar3

$ sudo pacman -S unixodbc
$ sudo pacman -S jdk-openjdk
$ sudo pacman -S wxwidgets-gtk3
$ sudo pacman -S fop

export KERL_DOC_TARGETS="html chunks"
export KERL_BUILD_DOCS=yes
export KERL_BUILD_BACKEND=tarball
export KERL_CONFIGURE_OPTIONS="--without-odbc" 

$ kerl update releases
$ kerl list releases
$ kerl list releases all
$ kerl build 27.0 27.0
$ mkdir ~/Kerl
$ kerl install 27.0 ~/Kerl/27.0
$ kerl delete build 27.0
$ kerl delete installation 27.0

$ mkdir -p ~/.local/share/bash-completion/completions/
$ curl https://raw.githubusercontent.com/kerl/kerl/master/bash_completion/kerl > ~/.local/share/bash-completion/completions/kerl
$ curl https://github.com/erlang/rebar3/blob/main/apps/rebar/priv/shell-completion/bash/rebar3 > ~/.local/share/bash-completion/completions/rebar3

Rebar3 installation:
https://rebar3.org/docs/getting-started/#installing-from-the-rebar3-escript

Create bash completion file:
rebar3 completion -s bash