runon/install

#!/usr/bin/bash

local_bin_dir=~/local/bin
local_config_dir=~/.config/runon
system_bin_dir=/usr/local/bin
system_config_dir=/etc/runon

op=install
bin_dir=$local_bin_dir
config_dir=$local_config_dir

function usage
{
    echo "$0 [local|system] [-u|--uninstall] [<dest>]"
    echo
    echo "  local            install for local user, by default"
    echo "  system           install for all users"
    echo "  dev              install in dev mode (create links to source)"
    echo "  -u, --uninstall  local or system uninstall"
    echo "  <dest>           destination dir for binary"
    echo 
    echo "default local paths:"
    echo "  binary: $local_bin_dir"
    echo "  config: $local_config_dir"
    echo
    echo "default system paths:"
    echo "  binary: $system_bin_dir"
    echo "  config: $system_config_dir"
    echo
}

function do_exec
{
    echo "$@"
    "$@"
}

while [ $# -gt 0 ]; do
    case $1 in
        local)
            bin_dir=$local_bin_dir
            config_dir=$local_config_dir
            ;;
        system)
            bin_dir=$system_bin_dir
            config_dir=$system_config_dir
            ;;
        dev)
            bin_dir=$local_bin_dir
            config_dir=$local_config_dir
            op=installdev
            ;;
        -u) 
            op=uninstall
            ;;
        --uninstall)
            op=uninstall
            ;;
        -h*)
            usage
            exit 0
            ;;
        *)  bin_dir=$1
            ;;
    esac
    shift
done

bin_dir=$(realpath $bin_dir)
config_dir=$(realpath $config_dir)

if [[ ":$PATH:" != *":$bin_dir:"* ]]; then
    echo "WARNING: $bin_dir is not in your PATH, runon will not be automatically found."
    echo
fi

set -e

if [ "$op" = "install" ]; then
    do_exec install -d $bin_dir
    do_exec install -d $config_dir
    #rm -f $bin_dir/runon
    #rm -f $config_dir/runon
    do_exec install runon $bin_dir
    do_exec install runon.conf $config_dir
elif [ "$op" = "installdev" ]; then
    do_exec install -d $bin_dir
    do_exec install -d $config_dir
    do_exec ln -s -f $(realpath runon) $bin_dir/
    do_exec ln -s -f $(realpath runon.conf) $config_dir/
elif [ "$op" = "uninstall" ]; then
    # find all symlinks targetting to runon, and remove them
    find $bin_dir -type l | while read l; do
        if [ "$(readlink $l)" = "runon" ]; then
            do_exec rm $l
        fi
    done

    do_exec rm -f $bin_dir/runon
    do_exec rm -f $config_dir/runon.conf
    test -d $bin_dir && do_exec rmdir --parents --ignore-fail-on-non-empty $bin_dir 2> /dev/null
    test -d $config_dir && do_exec rmdir --parents --ignore-fail-on-non-empty $config_dir 2> /dev/null
fi