Add curl (#56)

- Add curl binary installation to extended firmware

Author: horzadome

overlays/firmware-extended/20-system-utils/scripts/curl_install.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+
+set -eo pipefail
+
+ROOT_DIR="$(realpath "$(dirname "$0")/../../../..")"
+
+if [[ $# -ne 1 ]]; then
+  echo "Usage: $0 <rootfs-dir>"
+  exit 1
+fi
+
+echo ">> Installing latest curl from precompiled tarball"
+
+TARGET_DIR="$ROOT_DIR/tmp"
+
+VERSION=8.17.0
+FILENAME=curl-linux-aarch64-glibc-$VERSION.tar.xz
+URL=https://github.com/stunnel/static-curl/releases/download/$VERSION/$FILENAME
+BIN_SHA256=fa8d1db2f1651d94cdb061ede60f20b895edd31439d8e2eb25383606117c7316
+
+if [[ ! -f "$TARGET_DIR/$FILENAME" ]]; then
+  echo ">> Downloading $FILENAME..."
+  wget -O "$TARGET_DIR/$FILENAME" "$URL"
+fi
+
+echo ">> Extracting $FILENAME..."
+mkdir -p "$1/usr/local/bin"
+if ! tar -xJvf "$TARGET_DIR/$FILENAME" -C "$1/usr/local/bin" curl; then
+  echo "[!] Failed to extract curl from $FILENAME"
+  exit 1
+fi
+
+echo ">> Verifying /usr/local/bin/curl checksum..."
+echo "$BIN_SHA256  $1/usr/local/bin/curl" | sha256sum --check --status
+
+echo ">> Verifying if curl is executable..."
+if [[ ! -x "$1/usr/local/bin/curl" ]]; then
+  echo "[!] /usr/local/bin/curl is not executable."
+  exit 1
+fi
+
+echo ">> curl installed to $1/usr/local/bin"
+