add a script

.gitignore

@@ -35,4 +35,6 @@ build/
 .vscode/
 
 ### Mac OS ###
-.DS_Store
+.DS_Store
+
+Qt/

download_qt.sh

@@ -0,0 +1,98 @@
+#!/bin/bash
+
+gpg_exists() {
+  gpg --version &> /dev/null
+  return $?
+}
+
+download_and_verify() {
+  local file_url="$1"
+
+  if [ -v "$2" ]; then
+    local output_file="$2"
+  else
+    local output_file="${3:-$(basename "$file_url")}"
+    local signature_file="$2"
+  fi
+
+  if [ -v "$3" ]; then
+    local signature_file="$3"
+  else
+    local signature_file="$output_file.sig"
+  fi
+
+  echo
+  echo "Downloading from $file_url to $output_file and verifying $signature_file"
+
+  # Download the file
+  if ! curl -SfL "$file_url" -o "$output_file"; then
+    echo "Error: Failed to download the file from $file_url"
+    return 1
+  fi
+
+  echo
+  sha256sum $output_file
+
+  # Verify
+  if gpg_exists; then
+    if gpg --verify "$signature_file" "$output_file"; then
+      echo "File is valid"
+    else
+      echo "File is not valid"
+      rm "$output_file"
+      return 1
+    fi
+  else
+    echo "The file can't be verified because gpg is not installed"
+  fi
+
+  return 0
+}
+
+unpack() {
+  local archive_file=$1
+  local target_directory=$2
+
+  echo
+  echo "Unpacking..."
+
+  mkdir "$target_directory"
+  if tar -C "$target_directory" -xaf "$archive_file"; then
+    echo "Unpacked into $target_directory"
+  else
+    echo "Error unpacking"
+    return 1
+  fi
+
+  return 0
+}
+
+if [ -v "$1" ]; then
+  target="$1"
+else
+  target="$HOME/Qt"
+  echo "You did not specify where to extract, so extracting to $target"
+  echo "Press enter to proceed, Ctrl+C to abort"
+  read
+fi
+
+SYSTEM="$(uname) $(uname -p)"
+echo "System is $SYSTEM"
+
+if [[ "$SYSTEM" == "Linux x86_64" ]]; then
+  if download_and_verify "https://lfs724.b-cdn.net/qt672.tar.zst"; then
+    if unpack qt672.tar.zst $target; then
+      echo
+      echo "Downloaded to $target"
+    else
+      return 1
+    fi
+  else
+    return 1
+  fi
+
+  rm qt672.tar.zst
+else
+  echo "System is not supported"
+  exit 1
+fi