refactor(install.sh): check if user is root

scripts/install.sh

@@ -15,6 +15,16 @@ TMP_RELEASE_TAR="$TMP_DIR/release.tar.gz"
 OUTPUT_DIR="/usr/local/bin"
 PROGRAM_NAME="adless"
 
+check_root() {
+  if [ "$EUID" -ne 0 ]; then
+    echo "${INFO} ${COL_RED}Script called with non-root privileges${COL_NC}"
+    echo "For safety, please check the installer for any concerns regarding this requirement"
+    echo "Make sure to download this script from a trusted source"
+
+    exit 1
+  fi
+}
+
 check_system() {
   local uname_os="$(uname -s)"
   local uname_arch="$(uname -m)"
@@ -42,23 +52,23 @@ check_dependencies() {
 
 find_latest_version() {
   LATEST_VERSION=$(curl -s "https://api.github.com/repos/wittyjudge/adless/releases/latest" | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/')
-  echo -e "${INFO} Latest version: $LATEST_VERSION"
+  echo "${INFO} Latest version: $LATEST_VERSION"
 }
 
 find_latest_release_tar_url() {
   URL="https://github.com//WIttyJudge/adless/releases/download/${LATEST_VERSION}/adless_${LATEST_VERSION}_${OS}_${ARCH}.tar.gz"
-  echo -e "${INFO} Latest release tar: ${URL}"
+  echo "${INFO} Latest release tar: ${URL}"
 }
 
 install_release_tar() {
-  echo -e "${INFO} Downloading release tar ${URL}.."
+  echo "${INFO} Downloading release tar ${URL}.."
   curl --fail --progress-bar -L -o "$TMP_RELEASE_TAR" "$URL"
-  echo -e "${TICK} Release tar downloaded"
+  echo "${TICK} Release tar downloaded"
 
   tar -xzf "$TMP_RELEASE_TAR" -C "$TMP_DIR"
 
-  mv "$TMP_DIR/${PROGRAM_NAME}" "${OUTPUT_DIR}" || fail "Failed to make program executable, re-run the command using \"sudo bash\""
-  chmod +x "${OUTPUT_DIR}/${PROGRAM_NAME}" ||  fail "Failed to move binary, re-run the command using \"sudo bash\""
+  mv "$TMP_DIR/${PROGRAM_NAME}" "${OUTPUT_DIR}"
+  chmod +x "${OUTPUT_DIR}/${PROGRAM_NAME}"
 
   cleanup
 }
@@ -91,6 +101,7 @@ cat <<'EOF'
 
 EOF
 
+check_root
 check_system
 check_dependencies