install.sh: use case

install.sh

@@ -4,31 +4,37 @@ set -eu
 cd $HOME
 echo 'Installing dotfiles ...'
 
-if [ "$(uname)" == Darwin ]; then
-  # Ask for the administrator password upfront
-  printf 'Password for your PC [\e[32m?\e[m] ' && sudo -v
-  # Keep-alive: update existing `sudo` time stamp until this script has finished
-  while true; do sudo -n true; sleep 60; kill -0 "$$" || exit; done 2>/dev/null &
-  echo ''
-
-  echo 'Installing Xcode command line tools ...'
-  check="$(xcode-select --install 2>&1)"
-  str='xcode-select: note: install requested for command line developer tools'
-  while [ "$check" == "$str" ]; do
+case "$(uname)" in
+  Darwin)
+    # Ask for the administrator password upfront
+    printf 'Password for your PC [\e[32m?\e[m] ' && sudo -v
+    # Keep-alive: update existing `sudo` time stamp until this script has finished
+    while true; do sudo -n true; sleep 60; kill -0 "$$" || exit; done 2>/dev/null &
+    echo ''
+
+    echo 'Installing Xcode command line tools ...'
     check="$(xcode-select --install 2>&1)"
-    sleep 1
-  done
-elif [ "$(uname)" == Linux ]; then
-  # https://askubuntu.com/a/459425
-  local _distrotype="$(awk -F= '/^NAME/{print $2}' /etc/os-release)"
-  if [ "$_distrotype" != '"Manjaro Linux"' ]; then
-    echo "$_distrotype is not supported."
+    str='xcode-select: note: install requested for command line developer tools'
+    while [ "$check" == "$str" ]; do
+      check="$(xcode-select --install 2>&1)"
+      sleep 1
+    done
+    ;;
+
+  Linux)
+    # https://askubuntu.com/a/459425
+    local _distrotype="$(awk -F= '/^NAME/{print $2}' /etc/os-release)"
+    if [ "$_distrotype" != '"Manjaro Linux"' ]; then
+      echo "$_distrotype is not supported."
+      exit 1
+    fi
+    ;;
+
+  *)
+    echo "'$(uname)' is not supported."
     exit 1
-  fi
-else
-  echo "'$(uname)' is not supported."
-  exit 1
-fi
+    ;;
+esac
 
 echo 'Downloading ken-matsui/dotfiles ...'
 git clone https://github.com/ken-matsui/dotfiles.git