Improve virtmon

sdata/lib/functions.sh

@@ -344,3 +344,60 @@ function backup_clashing_targets(){
   x mkdir -p $backup_dir
   x rsync -av --progress "${args_includes[@]}" "$target_dir/" "$backup_dir/"
 }
+function install_cmds(){
+  case $OS_GROUP_ID in
+    "arch")
+      local pkgs=()
+      for cmd in "$@";do
+        # For package name which is not cmd name, use "case" syntax to replace
+        pkgs+=($cmd)
+      done
+      v sudo pacman -Syu
+      v sudo pacman -S --noconfirm --needed "${pkgs[@]}"
+      ;;
+    "debian")
+      local pkgs=()
+      for cmd in "$@";do
+        # For package name which is not cmd name, use "case" syntax to replace
+        pkgs+=($cmd)
+      done
+      v sudo apt update -y
+      v sudo apt install -y "${pkgs[@]}"
+      ;;
+    "fedora")
+      local pkgs=()
+      for cmd in "$@";do
+        # For package name which is not cmd name, use "case" syntax to replace
+        pkgs+=($cmd)
+      done
+      v sudo dnf install -y "${pkgs[@]}"
+      ;;
+    "suse")
+      local pkgs=()
+      for cmd in "$@";do
+        # For package name which is not cmd name, use "case" syntax to replace
+        pkgs+=($cmd)
+      done
+      v sudo zypper refresh
+      v sudo zypper -n install "${pkgs[@]}"
+      ;;
+    *)
+      printf "WARNING\n"
+      printf "No method found to install package providing the commands:\n"
+      printf "  $@\n"
+      printf "Please install by yourself.\n"
+      ;;
+  esac
+}
+function ensure_cmds(){
+  local not_found_cmds=()
+  for cmd in "$@"; do
+    if ! command -v $cmd >/dev/null 2>&1;then
+      not_found_cmds+=($cmd)
+    fi
+  done
+  if [[ ${#not_found_cmds[@]} -gt 0 ]]; then
+    echo -e "${STY_YELLOW}[$0]: Not found: ${not_found_cmds[*]}.${STY_RST}"
+    install_cmds "${not_found_cmds[@]}"
+  fi
+}