First commit

colorscript.sh

@@ -0,0 +1,103 @@
+#!/usr/bin/bash
+
+# Simple CLI for shell-color-scripts
+
+DIR_COLORSCRIPTS="/opt/shell-color-scripts/colorscripts"
+fmt_help="  %-20s\t%-54s\n"
+list_colorscripts="$(/usr/bin/ls "${DIR_COLORSCRIPTS}" | cut -d ' ' -f 1 | nl)"
+length_colorscripts="$(/usr/bin/ls "${DIR_COLORSCRIPTS}" | wc -l)"
+function _help() {
+    echo "Description: A collection of terminal color scripts."
+    echo ""
+    echo "Usage: colorscript [OPTION] [SCRIPT NAME/INDEX]"
+    printf "${fmt_help}" \
+        "-h, --help, help" "Print this help." \
+        "-l, --list, list" "List all installed color scripts." \
+        "-r, --random, random" "Run a random color script." \
+        "-e, --exec, exec" "Run a specified color script by SCRIPT NAME or INDEX."
+}
+
+function _list() {
+    echo "There are "$(/usr/bin/ls "${DIR_COLORSCRIPTS}" | wc -l)" installed color scripts:"
+    echo "${list_colorscripts}"
+}
+
+function _random() {
+    declare -i random_index=$RANDOM%$length_colorscripts
+    [[ $random_index -eq 0 ]] && random_index=1
+
+    random_colorscript="$(echo  "${list_colorscripts}" | sed -n ${random_index}p \
+        | tr -d ' ' | tr '\t' ' ' | cut -d ' ' -f 2)"
+    echo "${random_colorscript}"
+    exec "${DIR_COLORSCRIPTS}/${random_colorscript}"
+}
+
+function ifhascolorscipt() {
+    [[ -e "${DIR_COLORSCRIPTS}/$1" ]] && echo "Has this color script."
+}
+
+function _run_by_name() {
+    if [[ "$1" == "random" ]]; then
+        _random
+    elif [[ -n "$(ifhascolorscipt "$1")" ]]; then
+        exec "${DIR_COLORSCRIPTS}/$1"
+    else
+        echo "Input error, Don't have color script named $1."
+        exit 1
+    fi
+}
+
+function _run_by_index() {
+    if [[ "$1" -gt 0 && "$1" -lt "${length_colorscripts}" ]]; then
+
+        colorscript="$(echo  "${list_colorscripts}" | sed -n ${1}p \
+            | tr -d ' ' | tr '\t' ' ' | cut -d ' ' -f 2)"
+        exec "${DIR_COLORSCRIPTS}/${colorscript}"
+    else
+        echo "Input error, Don't have color script indexed $1."
+        exit 1
+    fi
+}
+
+function _run_colorscript() {
+    if [[ "$1" =~ ^[0-9]+$ ]]; then
+        _run_by_index "$1"
+    else
+        _run_by_name "$1"
+    fi
+}
+
+case "$#" in
+    0)
+        _help
+        ;;
+    1)
+        case "$1" in
+            -h | --help | help)
+                _help
+                ;;
+            -l | --list | list)
+                _list
+                ;;
+            -r | --random | random)
+                _random
+                ;;
+            *)
+                echo "Input error."
+                exit 1
+                ;;
+        esac
+        ;;
+    2)
+        if [[ "$1" == "-e" || "$1" == "--exec" || "$1" == "exec" ]]; then
+            _run_colorscript "$2"
+        else
+            echo "Input error."
+            exit 1
+        fi
+        ;;
+    *)
+        echo "Input error, too many arguments."
+        exit 1
+        ;;
+esac