docs/install.sh fixes: (#2781)

- fix lint
- fix colors
- add 'sudo' request before commands
- add pwndbg-macos-arm64 portable

docs/install.sh

@@ -9,6 +9,10 @@ BLUE='\033[0;34m'
 CYAN='\033[0;36m'
 NC='\033[0m' # No Color
 
+echo() {
+    printf "$@\n"
+}
+
 echoinfo() {
     echo "${BLUE}$@${NC}"
 }
@@ -23,7 +27,7 @@ echoerr() {
 
 missing=""
 for cmd in wget tar xz uname mktemp rm mkdir ln grep; do
-	if ! command -v $cmd >/dev/null 2>&1; then
+    if ! command -v $cmd > /dev/null 2>&1; then
         missing="$missing$cmd "
     fi
 done
@@ -97,9 +101,9 @@ if [ -t 0 ]; then
 fi
 
 case "$TYPE" in
-pwndbg-gdb) BINARY_NAME="pwndbg" ;;
+    pwndbg-gdb) BINARY_NAME="pwndbg" ;;
-pwndbg-lldb) BINARY_NAME="pwndbg-lldb" ;;
+    pwndbg-lldb) BINARY_NAME="pwndbg-lldb" ;;
-*)
+    *)
         echoerr "Please choose the type of Pwndbg installation."
         show_usage
         ;;
@@ -128,15 +132,18 @@ else
     BINARY_DST_PATH="${BINARY_DIR}/${BINARY_NAME}"
 
     # If we are a root in a container and `sudo` doesn't exist
-	if ! command -v sudo >/dev/null 2>&1 && whoami | grep -q root; then
+    if ! command -v sudo > /dev/null 2>&1 && whoami | grep -q root; then
         sudo() {
             ${*}
         }
+    else
+        echoinfo "Requesting 'sudo' privileges. You may be prompted for your password..."
+        sudo -v
     fi
 fi
 
 case "$OS" in
-Linux)
+    Linux)
         case "$ARCH" in
             x86_64) FILE="${BINARY_NAME}_${VERSION}_x86_64-portable.tar.xz" ;;
             i686) FILE="${BINARY_NAME}_${VERSION}_x86_32-portable.tar.xz" ;;
@@ -153,10 +160,9 @@ Linux)
                 ;;
         esac
         ;;
-Darwin)
+    Darwin)
         case "$ARCH" in
-	# arm64) FILE="${BINARY_NAME}_${VERSION}_macos_arm64-portable.tar.xz" ;;
+            arm64) FILE="${BINARY_NAME}_${VERSION}_macos_arm64-portable.tar.xz" ;;
-	arm64) FILE="${BINARY_NAME}_${VERSION}_macos_amd64-portable.tar.xz" ;;
             x86_64) FILE="${BINARY_NAME}_${VERSION}_macos_amd64-portable.tar.xz" ;;
             *)
                 echoerr "Unsupported architecture: $ARCH"
@@ -164,7 +170,7 @@ Darwin)
                 ;;
         esac
         ;;
-*)
+    *)
         echoerr "Unsupported operating system: $OS"
         exit 1
         ;;