install

#!/usr/bin/env bash

usage() {
    cat <<EOF
Usage: $0
This script will install fzf-help to /usr/share/fzf-help. If you
want to install without root privileges, use the --user option to install to
~/.local/share/fzf-help.

Options:
    --root      Install to /usr/share/fzf-help (default)
    --user      Install to ~/.local/share/fzf-help
    -h, --help  Show this help message
EOF
}

#######################################
# Parse command line arguments
#######################################
parse_args() {
    while [[ $# -gt 0 ]]; do
        case $1 in
            --root)
                shift
                ;;
            --user)
                plugin_dir="$HOME/.local/share/fzf-help"
                root=false
                shift
                ;;
            -h | --help)
                usage
                exit 0
                ;;
            *)
                echo "Unknown option: $1"
                usage
                exit 1
                ;;
        esac
    done
}

abort() {
    echo 'installation aborted'
    exit 1
}

#######################################
# Install fzf-help with, or without root privileges, depending on the value of
# the $root variable.
#######################################
install() {
    echo "Installing fzf-help at: $plugin_dir"

    makedir="mkdir -p $plugin_dir || abort"
    copy="cp $this_dir/src/* $plugin_dir || abort"
    copy_uninstall="cp $this_dir/uninstall $plugin_dir || abort"
    if $root; then
        echo "Installing as root"
        eval "sudo $makedir"
        eval "sudo $copy"
        eval "sudo $copy_uninstall"
    else
        echo "Installing as user"
        eval "$makedir"
        eval "$copy"
        eval "$copy_uninstall"
    fi

    echo 'Installation complete.'
}

this_dir=$(dirname $(realpath ${BASH_SOURCE:-$0}))
$this_dir/uninstall $@

root=true
plugin_dir=/usr/share/fzf-help
parse_args $@
install