scripts: Add wget build script

This commit adds a script to build wget for macOS and Windows, and
update the CI workflows to use it.

wget is provided as part of the non-Linux Zephyr SDK host tools because
there is currently no reliable source of pre-compiled binaries on macOS
and Windows when not using a package manager.

Signed-off-by: Stephanos Ioannidis <[email protected]>

Author: stephanosio

.github/workflows/ci.yml

@@ -1149,6 +1149,18 @@ jobs:
         mkdir -p ${WORKSPACE}/hosttools
         BUILD_OUTPUT="${WORKSPACE}/hosttools"
 
+        # Build wget
+        WGET_BUILD="${WORKSPACE}/build/wget"
+        WGET_SOURCE="${GITHUB_WORKSPACE}/wget"
+
+        mkdir -p ${WGET_BUILD}
+        pushd ${WGET_BUILD}
+        ${BUILD_PRECMD} ${GITHUB_WORKSPACE}/scripts/build_wget.sh \
+          ${{ matrix.host.name }} \
+          ${WGET_SOURCE} \
+          ${BUILD_OUTPUT}
+        popd
+
         # Build QEMU
         QEMU_BUILD="${WORKSPACE}/build/qemu"
         QEMU_SOURCE="${GITHUB_WORKSPACE}/qemu"

scripts/build_wget.sh

@@ -0,0 +1,119 @@
+#!/usr/bin/env bash
+
+set -e
+
+WGET_VERSION="1.25.0"
+
+usage()
+{
+  echo "Usage: $(basename $0) host source output"
+}
+
+# Validate and parse arguments
+if [ "$1" == "" ]; then
+  usage
+  echo
+  echo "host must be specified."
+  exit 1
+elif [ "$2" == "" ]; then
+  usage
+  echo
+  echo "source must be specified."
+  exit 1
+elif [ "$3" == "" ]; then
+  usage
+  echo
+  echo "output must be specified."
+  exit 1
+fi
+
+BUILD_HOST="$1"
+BUILD_SOURCE="$2"
+BUILD_OUTPUT="$3"
+
+# Set build parameters
+WGET_FLAGS=" \
+  --with-ssl=openssl \
+  --disable-pcre2 \
+  "
+
+if [ "${BUILD_HOST}" == "windows-x86_64" ]; then
+  BUILD_PREFIX="${BUILD_OUTPUT}/wget"
+
+  WGET_FLAGS+="--host=x86_64-w64-mingw32"
+elif [[ "${BUILD_HOST}" =~ ^macos-.* ]]; then
+  BUILD_PREFIX="${BUILD_OUTPUT}/opt/wget"
+
+  case ${BUILD_HOST} in
+    macos-aarch64)
+      HOMEBREW_PREFIX="/opt/homebrew"
+      ;;
+    macos-x86_64)
+      HOMEBREW_PREFIX="/usr/local"
+      ;;
+  esac
+
+  # Ensure that arch-specific Homebrew environment is configured
+  eval $(${HOMEBREW_PREFIX}/bin/brew shellenv)
+
+  # Specify statically linked libraries and their dependencies
+  export LIBIDN2_LIBS=" \
+    ${HOMEBREW_PREFIX}/lib/libidn2.a \
+    ${HOMEBREW_PREFIX}/lib/libunistring.a \
+    "
+
+  export OPENSSL_LIBS=" \
+    ${HOMEBREW_PREFIX}/lib/libssl.a \
+    ${HOMEBREW_PREFIX}/lib/libcrypto.a \
+    "
+else
+  echo "ERROR: Invalid build host '${BUILD_HOST}'"
+  exit 1
+fi
+
+# Download and extract wget source code
+mkdir -p ${BUILD_SOURCE}
+pushd ${BUILD_SOURCE}
+wget -O wget.tar.gz https://ftp.gnu.org/gnu/wget/wget-${WGET_VERSION}.tar.gz
+tar --strip-components=1 -xvf wget.tar.gz
+popd
+
+# Build wget
+${BUILD_SOURCE}/configure \
+  ${WGET_FLAGS} \
+  --prefix="${BUILD_PREFIX}"
+
+make -j
+make install
+
+# Install root CA certificates (Mozilla CA certificate store)
+mkdir -p ${BUILD_PREFIX}/etc/ssl
+wget \
+  -O ${BUILD_PREFIX}/etc/ssl/cert.pem \
+  https://curl.se/ca/cacert.pem
+
+# Copy required dynamic-link libraries for Windows
+if [ "${BUILD_HOST}" == "windows-x86_64" ]; then
+  WGET_WIN_LIBS=" \
+    /opt/mingw-w64-win32/x86_64-w64-mingw32/bin/libcrypto-3-x64.dll \
+    /opt/mingw-w64-win32/x86_64-w64-mingw32/bin/libiconv-2.dll \
+    /opt/mingw-w64-win32/x86_64-w64-mingw32/bin/libidn2-0.dll \
+    /opt/mingw-w64-win32/x86_64-w64-mingw32/bin/libintl-8.dll \
+    /opt/mingw-w64-win32/x86_64-w64-mingw32/bin/libssl-3-x64.dll \
+    /opt/mingw-w64-win32/x86_64-w64-mingw32/bin/libunistring-5.dll \
+    "
+
+  for l in ${WGET_WIN_LIBS}; do
+    cp -f ${l} ${BUILD_PREFIX}/bin
+  done
+fi
+
+# Symlink wget executable for macOS
+if [[ "${BUILD_HOST}" =~ ^macos-.* ]]; then
+  mkdir -p ${BUILD_OUTPUT}/usr/bin
+  pushd ${BUILD_OUTPUT}/usr/bin
+
+  ln -sf ../../opt/wget/bin/wget wget
+
+  popd
+fi