add elf_package "manager"

private_dot_local/bin/executable_elf_packages

@@ -0,0 +1,104 @@
+#!/usr/bin/env bash
+
+SCRIPTS_DIR="$HOME/.local/share/elfos"
+
+function print_help() {
+    echo "usage: elf_packages <ACTION>"
+    echo
+    echo "ACTION:"
+    echo "  list                list available scripts"
+    echo "  install <script>    execute install script"
+    echo "  uninstall <script>  execute remove script"
+    echo "  help                display this help"
+}
+
+function check_if_script_exists() {
+    script="$1"
+
+    if [[ ! -f "$SCRIPTS_DIR/$script.sh" ]]
+    then
+        echo "ERROR: $script does not exists"
+        print_help
+        return 1
+    else
+        return 0
+    fi
+}
+
+function install_pacman_deps() {
+    deps="$1"
+
+    pacman -Sy --noconfirm $deps
+}
+
+function update() {
+    script="$1"
+
+    check_if_script_exists "$script" || return 1
+
+    . "$SCRIPTS_DIR/$script.sh"
+
+    if package_check_installed
+    then
+        package_update
+    else
+        echo "package not installed"
+    fi
+}
+
+function uninstall() {
+    script="$1"
+
+    check_if_script_exists "$script" || return 1
+
+    . "$SCRIPTS_DIR/$script.sh"
+
+    if package_check_installed
+    then
+        package_remove
+    else
+        echo "package not installed"
+    fi
+}
+
+function update() {
+    script="$1"
+
+    check_if_script_exists "$script" && return 1
+
+    . "$SCRIPTS_DIR/$script"
+    package_update
+}
+
+case $1 in
+    list)
+        find "$SCRIPTS_DIR" -maxdepth 1 -name '*.sh' \
+            -exec basename "{}" ';' \
+            | sed -e 's/\.sh$//'
+        ;;
+    install)
+        shift
+        install $*
+        ;;
+    uninstall)
+        shift
+        uninstall $*
+        ;;
+    update)
+        shift
+        update $*
+        ;;
+    help)
+        print_help
+        ;;
+    "--help")
+        print_help
+        ;;
+    "-h")
+        print_help
+        ;;
+    *) 
+        echo "ERROR: invalid action $1"
+        print_help
+        ;;
+esac