Add installation script for crabd

Author: scnplt

install.sh

@@ -0,0 +1,42 @@
+#!/bin/sh
+
+err_msg="\033[31m> A problem occured during download!\033[0m"
+add_path=false
+version=latest
+
+if [ -n "$1" ]; then
+  version="$1"
+fi
+file_url="https://github.com/scnplt/crabd/releases/download/$version/linux-crabd.tar.gz"
+
+read -p "Do you want to add crabd to /usr/bin/? (y/N): " user_input
+if echo "$user_input" | grep -iq "^[Yy]$"; then
+  add_path=true
+fi
+
+echo "Downloading from $file_url"
+
+if which curl >/dev/null; then
+  if ! curl -fSL "$file_url" -o linux-crabd.tar.gz; then
+    echo "$err_msg"
+    exit 1
+  fi
+elif which wget >/dev/null; then
+  if ! wget "$file_url"; then
+    echo "err_msg"
+    exit 1
+  fi
+else
+  echo 'curl or wget not installed!'
+  exit 1
+fi
+
+tar xzf linux-crabd.tar.gz
+rm linux-crabd.tar.gz
+
+if $add_path; then
+  echo '\033[33m> Adding crabd to /usr/bin/\033[0m'
+  mv crabd /usr/bin && chmod +x /usr/bin/crabd
+fi
+
+echo '\033[32m> Installation complete.\033[0m'