feat(install): add support for compressed .zst archives

- Introduces detection for 'zstd' to handle .zst archives if available
- Adds checksum verification and decompression for .zst files
- Falls back to uncompressed binary download if 'zstd' is unavailable
- Improves installation flexibility and reduces binary download size

scripts/install.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# Fail-safe bash mode (only if bash is used)
+# Fail-safe bash mode
 if [ -n "$BASH_VERSION" ]; then
   set -euo pipefail
 else
@@ -26,38 +26,72 @@ case "$OS" in
   *) echo "Unsupported OS: $OS" >&2; exit 1 ;;
 esac
 
-# === Download-URL zusammensetzen ===
-BINARY_FILE="${BINARY_NAME}-${OS}-${ARCH}"
-DOWNLOAD_URL="${REPO_URL}/${BINARY_FILE}"
+# === Datei- und URL-Namen ===
+BASE_NAME="${BINARY_NAME}-${OS}-${ARCH}"
+ZST_NAME="${BASE_NAME}.zst"
+ZST_URL="${REPO_URL}/${ZST_NAME}"
+BIN_URL="${REPO_URL}/${BASE_NAME}"
 
 echo "📦 Installing ${BINARY_NAME} for ${OS}/${ARCH}..."
-echo "🌐 Downloading from: ${DOWNLOAD_URL}"
 
-# === Binary herunterladen ===
-TMP_FILE=$(mktemp)
-curl -fsSL "${DOWNLOAD_URL}" -o "${TMP_FILE}"
-chmod +x "${TMP_FILE}"
-
-# === SHA256-Check ===
-TMP_HASH=$(mktemp)
-curl -fsSL "${DOWNLOAD_URL}.sha256" -o "$TMP_HASH"
-EXPECTED_HASH=$(cut -d ' ' -f1 "$TMP_HASH")
-ACTUAL_HASH=$(openssl dgst -sha256 "$TMP_FILE" | awk '{print $2}')
-
-if [ "$EXPECTED_HASH" != "$ACTUAL_HASH" ]; then
-  echo "⚠️ Checksum mismatch!"
-  echo "Expected: $EXPECTED_HASH"
-  echo "Actual:   $ACTUAL_HASH"
-  exit 1
+USE_ZSTD=false
+if command -v zstd >/dev/null; then
+  echo "✅ 'zstd' found – will use compressed .zst archive"
+  USE_ZSTD=true
 fi
 
-# === Installation ===
+TMP_DIR=$(mktemp -d)
+cleanup() {
+  rm -rf "$TMP_DIR"
+}
+trap cleanup EXIT
+
+if [ "$USE_ZSTD" = true ]; then
+  echo "🌐 Downloading: ${ZST_URL}"
+  curl -fsSL "$ZST_URL" -o "$TMP_DIR/${ZST_NAME}"
+  echo "🌐 Downloading checksum: ${ZST_URL}.sha256"
+  curl -fsSL "$ZST_URL.sha256" -o "$TMP_DIR/zst.sha256"
+
+  EXPECTED_HASH=$(cut -d ' ' -f1 "$TMP_DIR/zst.sha256")
+  ACTUAL_HASH=$(openssl dgst -sha256 "$TMP_DIR/${ZST_NAME}" | awk '{print $2}')
+
+  if [ "$EXPECTED_HASH" != "$ACTUAL_HASH" ]; then
+    echo "⚠️ Checksum mismatch for .zst archive!"
+    echo "Expected: $EXPECTED_HASH"
+    echo "Actual:   $ACTUAL_HASH"
+    exit 1
+  fi
+
+  echo "📥 Decompressing..."
+  zstd -d -q "$TMP_DIR/${ZST_NAME}" -o "$TMP_DIR/${BASE_NAME}"
+  TMP_FILE="$TMP_DIR/${BASE_NAME}"
+
+else
+  echo "🌐 Downloading uncompressed binary: ${BIN_URL}"
+  curl -fsSL "$BIN_URL" -o "$TMP_DIR/${BASE_NAME}"
+  echo "🌐 Downloading checksum: ${BIN_URL}.sha256"
+  curl -fsSL "$BIN_URL.sha256" -o "$TMP_DIR/binary.sha256"
+
+  EXPECTED_HASH=$(cut -d ' ' -f1 "$TMP_DIR/binary.sha256")
+  ACTUAL_HASH=$(openssl dgst -sha256 "$TMP_DIR/${BASE_NAME}" | awk '{print $2}')
+
+  if [ "$EXPECTED_HASH" != "$ACTUAL_HASH" ]; then
+    echo "⚠️ Checksum mismatch!"
+    echo "Expected: $EXPECTED_HASH"
+    echo "Actual:   $ACTUAL_HASH"
+    exit 1
+  fi
+
+  TMP_FILE="$TMP_DIR/${BASE_NAME}"
+fi
+
+chmod +x "$TMP_FILE"
 echo "🚀 Installing to ${INSTALL_PATH}/${BINARY_NAME}"
 if [ -w "$INSTALL_PATH" ]; then
-  install -m 755 "${TMP_FILE}" "${INSTALL_PATH}/${BINARY_NAME}"
+  install -m 755 "$TMP_FILE" "${INSTALL_PATH}/${BINARY_NAME}"
 else
-  sudo install -m 755 "${TMP_FILE}" "${INSTALL_PATH}/${BINARY_NAME}"
+  sudo install -m 755 "$TMP_FILE" "${INSTALL_PATH}/${BINARY_NAME}"
 fi
 
 echo "✅ Installation complete: $(command -v ${BINARY_NAME})"
-"${BINARY_NAME}" --version || true
+"${BINARY_NAME}" --version || true