Install bash scripts improvements

install.sh

@@ -1,36 +1,51 @@
 #!/bin/bash
+# Check if the script is running as root
+# Initialize the elevated variable to ensure we can run commands as root
+if [ "$EUID" -eq 0 ]; then
+    elevated="bash -c"  # No need for sudo or su if running as root
+elif command -v sudo &> /dev/null; then
+    elevated="sudo bash -c"  # Use sudo if available
+elif command -v su &> /dev/null; then
+    elevated="su root -c"  # Use su if sudo isn't available
+else
+    echo "Error: Neither sudo nor su is available. Unable to run command as root."
+    exit 1
+fi
 set -e -o pipefail
 shopt -s nocaseglob
 
 OUT_FILE=/usr/local/bin/autorestic
+TMP_FILE=/tmp/autorestic
 
 # Type
 NATIVE_OS=$(uname | tr '[:upper:]' '[:lower:]')
-if [[ $NATIVE_OS == *"linux"* ]]; then
-    OS=linux
-elif [[ $NATIVE_OS == *"darwin"* ]]; then
-    OS=darwin
-elif [[ $NATIVE_OS == *"freebsd"* ]]; then
-    OS=freebsd
-else
-    echo "Could not determine OS automatically, please check the release page manually: https://github.com/cupcakearmy/autorestic/releases"
+case $NATIVE_OS in
+  *linux*)
+    OS=linux;;
+  *darwin*)
+    OS=darwin;;
+  *freebsd*)
+    OS=freebsd;;
+  *)
+    echo "Could not determine OS automatically, please check the release page"\
+    "manually: https://github.com/cupcakearmy/autorestic/releases"
     exit 1
-fi
+    ;;
+esac
 echo $OS
 
 NATIVE_ARCH=$(uname -m | tr '[:upper:]' '[:lower:]')
-if [[ $NATIVE_ARCH == *"x86_64"* || $NATIVE_ARCH == *"amd64"* ]]; then
-    ARCH=amd64
-elif [[ $NATIVE_ARCH == *"arm64"* || $NATIVE_ARCH == *"aarch64"* ]]; then
-    ARCH=arm64
-elif [[ $NATIVE_ARCH == *"x86"* ]]; then
-    ARCH=386
-elif [[ $NATIVE_ARCH == *"armv7"* ]]; then
-    ARCH=arm
-else
-    echo "Could not determine Architecure automatically, please check the release page manually: https://github.com/cupcakearmy/autorestic/releases"
-    exit 1
-fi
+case $NATIVE_ARCH in
+  *x86_64*|*amd64*) ARCH=amd64 ;;
+  *arm64*|*aarch64*) ARCH=arm64 ;;
+  *x86*) ARCH=386 ;;
+  *armv7*) ARCH=arm ;;
+        *)
+          echo "Could not determine Architecure automatically, please check the"\
+          "release page manually: https://github.com/cupcakearmy/autorestic/releases"
+          exit 1
+          ;;
+esac
 echo $ARCH
 
 if ! command -v bzip2 &>/dev/null; then
@@ -40,11 +55,13 @@ fi
 
 wget -qO - https://api.github.com/repos/cupcakearmy/autorestic/releases/latest \
 | grep "browser_download_url.*_${OS}_${ARCH}" \
-| cut -d : -f 2,3 \
-| tr -d \" \
-| wget -O "${OUT_FILE}.bz2" -i -
-bzip2 -fd "${OUT_FILE}.bz2"
-chmod +x ${OUT_FILE}
+| xargs | cut -d ' ' -f 2 \
+| wget -O "${TMP_FILE}.bz2" -i -
+$elevated "
+  bzip2 -cd ${TMP_FILE}.bz2 > ${OUT_FILE}
+  chmod +x ${OUT_FILE}
+  autorestic install
+"
+rm ${TMP_FILE}.bz2
 
-autorestic install
-echo "Successfully installed autorestic"
+echo "Successfully installed autorestic under ${OUT_FILE}"