Alpine: refactor code related to architecture identification

alpinelinux/install-release.sh

@@ -2,8 +2,34 @@
 
 set -euxo pipefail
 
-# Identify architecture
-case "$(arch -s)" in
+TMP_DIRECTORY="$(mktemp -d)/"
+ZIP_FILE="${TMP_DIRECTORY}Xray-linux-$MACHINE.zip"
+DOWNLOAD_LINK="https://github.com/XTLS/Xray-core/releases/latest/download/Xray-linux-$MACHINE.zip"
+
+check_alpine() {
+    if [ -f /etc/alpine-release ]; then
+        return 0
+    else
+        return 1
+    fi
+}
+
+check_if_running_as_root() {
+    # If you want to run as another user, please modify $EUID to be owned by this user
+    if [ "$(id -u)" -eq 0 ]; then
+        return 0
+    else
+        echo "error: You must run this script as root!"
+        return 1
+    fi
+}
+
+identify_architecture() {
+    if [ "$(uname)" != 'Linux' ]; then
+        echo "error: This operating system is not supported."
+        return 1
+    fi
+    case "$(uname -m)" in
     'i386' | 'i686')
         MACHINE='32'
         ;;
@@ -32,6 +58,7 @@ case "$(arch -s)" in
         ;;
     'mips64')
         MACHINE='mips64'
+        lscpu | grep -q "Little Endian" && MACHINE='mips64le'
         ;;
     'mips64le')
         MACHINE='mips64le'
@@ -50,28 +77,11 @@ case "$(arch -s)" in
         ;;
     *)
         echo "error: The architecture is not supported."
-    exit 1
+        return 1
         ;;
     esac
-
-TMP_DIRECTORY="$(mktemp -d)/"
-ZIP_FILE="${TMP_DIRECTORY}Xray-linux-$MACHINE.zip"
-DOWNLOAD_LINK="https://github.com/XTLS/Xray-core/releases/latest/download/Xray-linux-$MACHINE.zip"
-
-check_alpine() {
-    if [ -f /etc/alpine-release ]; then
-        return 0
-    else
-        return 1
-    fi
-}
-
-check_if_running_as_root() {
-    # If you want to run as another user, please modify $EUID to be owned by this user
-    if [ "$(id -u)" -eq 0 ]; then
-        return 0
-    else
-        echo "error: You must run this script as root!"
+    if [ ! -f '/etc/os-release' ]; then
+        echo "error: Don't use outdated Linux distributions."
         return 1
     fi
 }
@@ -203,6 +213,7 @@ information() {
 main() {
     check_alpine || return 1
     check_if_running_as_root || return 1
+    identify_architecture || return 1
     install_software
     download_xray
     verification_xray