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#!/usr/bin/env bash
set -euo pipefail
usage() {
echo "Usage: $0 <distro> <kernel-version>"
echo " kernel-version: output of 'uname -r' on target machine"
echo " Example: $0 noble 6.11.0-17-generic"
echo " Example: $0 resolute 7.0.0-15-generic"
exit 1
}
[[ $# -ne 2 ]] && usage
DISTRO="$1"
KERNEL_VERSION="$2"
OUTPUT_DIR="/tmp/bcmwl-drivers-${KERNEL_VERSION}"
BASE_URL="http://archive.ubuntu.com/ubuntu"
INDEX_DIR=$(mktemp -d)
cleanup() { rm -rf "$INDEX_DIR"; }
fetch_index() {
local pocket="$1" component="$2"
local dest="${INDEX_DIR}/${pocket}-${component}.txt"
echo "Fetching ${pocket}/${component} index..." >&2
if ! curl -fsSL "${BASE_URL}/dists/${pocket}/${component}/binary-amd64/Packages.gz" \
| gzip -d > "$dest"; then
echo "ERROR: failed to fetch ${BASE_URL}/dists/${pocket}/${component} (HTTP 404? wrong distro name?)" >&2
exit 1
fi
echo "$dest"
}
pkg_field() {
local index="$1" pkg_name="$2" field="$3"
awk '/^Package: '"$pkg_name"'$/{found=1} found && /^'"$field"':/{print; found=0; exit}' "$index"
}
pkg_filename() {
pkg_field "$1" "$2" "Filename" | awk '{print $2}'
}
download_pkg() {
local pkg_name="$1"
local filename=""
for index in "${INDEXES[@]}"; do
filename=$(pkg_filename "$index" "$pkg_name")
[[ -n "$filename" ]] && break
done
if [[ -z "$filename" ]]; then
echo "WARNING: $pkg_name not found in any index, skipping" >&2
return 0
fi
local deb
deb=$(basename "$filename")
if [[ -f "${OUTPUT_DIR}/${deb}" ]]; then
echo " (cached) $deb"
return 0
fi
echo "Downloading $deb..."
curl -fL -o "${OUTPUT_DIR}/${deb}" "${BASE_URL}/${filename}"
}
require_pkg() {
local pkg_name="$1"
local filename=""
for index in "${INDEXES[@]}"; do
filename=$(pkg_filename "$index" "$pkg_name")
[[ -n "$filename" ]] && break
done
if [[ -z "$filename" ]]; then
echo "ERROR: required package $pkg_name not found in any index" >&2
exit 1
fi
local deb
deb=$(basename "$filename")
if [[ -f "${OUTPUT_DIR}/${deb}" ]]; then
echo " (cached) $deb"
return 0
fi
echo "Downloading $deb..."
curl -fL -o "${OUTPUT_DIR}/${deb}" "${BASE_URL}/${filename}"
}
# Create out directory and configure trap signal
mkdir -p "$OUTPUT_DIR"
trap cleanup EXIT
# Fetch indexes
main_index=$(fetch_index "$DISTRO" "main")
restricted_index=$(fetch_index "$DISTRO" "restricted")
main_updates=$(fetch_index "${DISTRO}-updates" "main")
restricted_updates=$(fetch_index "${DISTRO}-updates" "restricted")
INDEXES=("$main_updates" "$restricted_updates" "$main_index" "$restricted_index")
# Auto-discover gcc version from distro's gcc metapackage
GCC_VER=$(pkg_field "$main_index" "gcc" "Depends" \
| grep -o 'gcc-[0-9]*' | head -1 | cut -d- -f2 || true)
if [[ -z "$GCC_VER" ]]; then
echo "ERROR: cannot determine gcc version from index" >&2
exit 1
fi
echo "Detected gcc version: $GCC_VER"
# Kernel headers
require_pkg "linux-headers-${KERNEL_VERSION}"
# Auto-discover base headers from Depends: field (search all indexes)
BASE_HEADERS_PKG=""
for index in "${INDEXES[@]}"; do
BASE_HEADERS_PKG=$(pkg_field "$index" "linux-headers-${KERNEL_VERSION}" "Depends" \
| grep -o 'linux-headers-[0-9][^ ,)]*\|linux-hwe-[^ ,)]*' | head -1 || true)
[[ -n "$BASE_HEADERS_PKG" ]] && break
done
if [[ -n "$BASE_HEADERS_PKG" ]]; then
echo "Base headers: $BASE_HEADERS_PKG"
download_pkg "$BASE_HEADERS_PKG"
fi
# Broadcom source
require_pkg "broadcom-sta-dkms"
# Build tools (not pre-installed on Ubuntu live ISO)
echo "Downloading build tools..."
for pkg in \
make \
gcc-${GCC_VER}-base \
cpp-${GCC_VER}-x86-64-linux-gnu cpp-${GCC_VER} cpp-x86-64-linux-gnu cpp \
gcc-${GCC_VER}-x86-64-linux-gnu gcc-${GCC_VER} gcc-x86-64-linux-gnu gcc \
binutils-common libsframe1 libbinutils libctf-nobfd0 libctf0 \
libjansson4 libgprofng0 binutils-x86-64-linux-gnu binutils \
libcc1-0 libisl23 libmpfr6 libmpc3 libgcc-${GCC_VER}-dev lto-disabled-list; do
download_pkg "$pkg"
done
# Copy install script alongside the debs
cp "$(dirname "$0")/install-wl.sh" "$OUTPUT_DIR/"
chmod +x "$OUTPUT_DIR/install-wl.sh"
echo ""
echo "Downloaded to $OUTPUT_DIR"
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