Scripts/bin/ihsec.sh

#!/usr/bin/env bash
set -euo pipefail # bash strict mode
# source: https://github.com/daedreth/ihsec

CONFIGS_DIR=$HOME'/.ihsec/'
# Uncomment to use this script from the same folder as emacs configs
#CONFIGS_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

echo " Configuration directory: "$CONFIGS_DIR
CONFIGDIRS="$CONFIGS_DIR/*/"
EMACSDIR=$HOME'/.emacs.d'

function displayHelp
{
    echo -e " Usage:\n\t'ihsec' - To view this help menu.\n\t'ihsec list' - To view a list of available configurations."
    echo -e "\t'ihsec set <config>' - To set a configuration.\n\t'ihsec del <config>' - To delete a config."
    echo -e "\t'ihsec install <url_to_git_repo> <name_for_the_config>' - To install a configuration via git."; exit 1
}

function displayError
{
    echo -e " Something went wrong!\n Ensure ~/.emacs.d is a symlink or does not exist!"; exit $?
}

function displayArgError
{
    echo -e " Wrong number of arguments entered.\n Use 'ihsec help' or 'ihsec' to learn about the usage."; exit 1
}

if [ "$#" -eq 0 ]; then displayHelp; fi

case "$1" in
    list)
        if [ ! "$#" -eq 1 ]; then displayArgError; fi
        CURR_CONFIG=$(basename $(readlink -f $HOME/.emacs.d/))
        echo -e " Available configurations:"
        for DIR in $CONFIGDIRS; do
            if [[ -d $DIR ]]; then
                if [[ $DIR == *"$CURR_CONFIG"* ]]; then echo -en "->"; else echo -en "  "; fi
                echo -en "  \u2022" $(basename $DIR)"\n"
            fi
        done
        ;;

    set)
        if [ ! "$#" -eq 2 ]; then displayArgError; fi
        if [ -d "$CONFIGS_DIR/$2" ]; then
            unlink $EMACSDIR &> /dev/null
            ln -s "$CONFIGS_DIR/$2" $EMACSDIR
            if [[ $? != 0 ]]; then
                displayError
            else
                echo "Configuration $2 set!"
            fi
        else
            echo "Invalid configuration name, ensure it exists!"; exit 1
        fi
        ;;

    del)
        if [ ! "$#" -eq 2 ]; then displayArgError; fi
        if [ -d "$CONFIGS_DIR/$2" ]; then
            read -rsn1 -p "Are you sure? This can not be undone! [y/n]: " yn
            case $yn in
                [Yy]* )
                    rm -rf "$CONFIGS_DIR/$2"
                    if [[ $? != 0 ]]; then
                        displayError
                    else
                        echo -e "\nConfiguration $2 removed!"
                    fi
                    ;;

                [Nn]* )
                    echo -e "\nExiting..."
                    exit 1
                    ;;

                * ) echo -e "\nPlease answer 'y' or 'n'." ;;
            esac
        else
            echo " Invalid configuration name, ensure it exists!"
            exit 1
        fi
        ;;

    install)
        if [ ! "$#" -eq 3 ]; then displayArgError; fi
        echo "Installing $3 from $2..."
        git clone $2 "$CONFIGS_DIR/$3" &> /dev/null
        if [[ $? != 0 ]]; then
            echo "Something went wrong, ensure your connection is stable and the link is valid."
        else
            echo "Installed $3 successfully!"
        fi
        ;;

    help)
        if [ ! "$#" -eq 1 ]; then displayArgError; fi; displayHelp
        ;;

    *)
        echo -e " Unknown command entered.\n Use 'ihsec help' or 'ihsec' to learn about the usage."
esac