Add a proper argument parsing to gef-extras.sh (#872)

scripts/gef-extras.sh

@@ -5,19 +5,32 @@
 #
 set -e
 
+usage() { echo "Usage: $0 [-b <main|dev>] [-p <path_to_install>]" 1>&2; exit 1; }
+
 branch="main"
-if [ "$1" = "dev" ]; then
-    branch="dev"
-    echo "set branch to dev"
-fi
+while getopts ":b:p:" o; do
+    case "${o}" in
+        b)
+            branch=${OPTARG}
+            ;;
+        p)
+            path=${OPTARG}
+            ;;
+        *)
+            usage
+            ;;
+    esac
+done
 
-if [ $# -ge 1 ]; then
-  DIR="$(realpath "$1")/gef-extras"
-  test -d "${DIR}" || exit 1
-elif [ -d "${HOME}/.config" ]; then
-  DIR="${HOME}/.config/gef-extras"
+if [ -z "$path" ]; then
+  if [ -d "${HOME}/.config" ]; then
+    DIR="${HOME}/.config/gef-extras"
+  else
+    DIR="${HOME}/.gef-extras"
+  fi
 else
-  DIR="${HOME}/.gef-extras"
+  DIR="$(realpath "$path")/gef-extras"
+  test -d "${DIR}" || exit 1
 fi
 
 git clone --branch ${branch} https://github.com/hugsy/gef-extras.git "${DIR}"