first pass of merging in warp (doesn't build)
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Ryan Ward
Executable
+236
@@ -0,0 +1,236 @@
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#!/usr/bin/env bash
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#
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# This script configures a complete musl C and C++ toolchain for a Rust target.
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# Source this script so it can update the caller's environment.
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configure_musl_toolchain() {
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local target="${1:-$(uname -m)-unknown-linux-musl}"
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local musl_cross_tag="20250929"
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local musl_cross_sha256
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case "$target" in
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aarch64-unknown-linux-musl)
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musl_cross_sha256="28a1d26f14f8ddc3aed31f20705fe696777400eb5952d90470a7e6e2dd1175bb"
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;;
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x86_64-unknown-linux-musl)
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musl_cross_sha256="6534870abd7dc327fd2e14cc53972d0552b21f47db5769505534f788537e3544"
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;;
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*)
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echo "Error: unsupported musl target '$target'." >&2
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return 1
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;;
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esac
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local compiler_prefix
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local musl_cc=""
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local musl_cxx=""
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local musl_strip=""
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for compiler_prefix in "$target" "${target/unknown-/}"; do
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if command -v "$compiler_prefix-gcc" &>/dev/null \
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&& command -v "$compiler_prefix-g++" &>/dev/null \
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&& command -v "$compiler_prefix-strip" &>/dev/null; then
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musl_cc="$(command -v "$compiler_prefix-gcc")"
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musl_cxx="$(command -v "$compiler_prefix-g++")"
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musl_strip="$(command -v "$compiler_prefix-strip")"
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break
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fi
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done
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if [[ -z "$musl_cc" && "$target" == "$(uname -m)-unknown-linux-musl" ]] \
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&& command -v musl-gcc &>/dev/null \
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&& command -v musl-g++ &>/dev/null \
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&& command -v strip &>/dev/null; then
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musl_cc="$(command -v musl-gcc)"
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musl_cxx="$(command -v musl-g++)"
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musl_strip="$(command -v strip)"
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fi
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local default_musl_cross_root
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if [[ -z "${WARP_MUSL_CROSS_ROOT:-}" && "${GITHUB_ACTIONS:-}" == "true" && -n "${RUNNER_TEMP:-}" ]]; then
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default_musl_cross_root="$RUNNER_TEMP/warp-musl-cross"
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elif [[ -n "${HOME:-}" ]]; then
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default_musl_cross_root="${XDG_CACHE_HOME:-$HOME/.cache}/warp-musl-cross"
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else
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default_musl_cross_root="${TMPDIR:-/tmp}/warp-musl-cross-${UID:-$(id -u)}"
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fi
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local musl_cross_root="${WARP_MUSL_CROSS_ROOT:-$default_musl_cross_root}"
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local install_root="$musl_cross_root/$musl_cross_tag"
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local toolchain_dir="$install_root/$target"
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local toolchain_bin="$toolchain_dir/bin"
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local verified_marker="$toolchain_dir/.warp-musl-cross-verified"
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local verified_marker_contents="$musl_cross_tag $target $musl_cross_sha256"
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ensure_private_cache_dir() {
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local dir="$1"
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if [[ -L "$dir" ]]; then
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echo "Error: musl toolchain cache directory '$dir' must not be a symlink." >&2
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return 1
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fi
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if [[ -e "$dir" && ! -d "$dir" ]]; then
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echo "Error: musl toolchain cache path '$dir' exists but is not a directory." >&2
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return 1
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fi
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mkdir -p "$dir" || return 1
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chmod 700 "$dir" || return 1
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if [[ ! -O "$dir" ]]; then
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echo "Error: musl toolchain cache directory '$dir' must be owned by the current user." >&2
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return 1
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fi
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local mode
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if mode="$(stat -c '%a' "$dir" 2>/dev/null)"; then
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:
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elif mode="$(stat -f '%Lp' "$dir" 2>/dev/null)"; then
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:
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else
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echo "Error: could not determine permissions for musl toolchain cache directory '$dir'." >&2
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return 1
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fi
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if (( (8#$mode & 0022) != 0 )); then
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echo "Error: musl toolchain cache directory '$dir' must not be writable by group or others." >&2
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return 1
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fi
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}
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cached_toolchain_is_verified() {
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[[ -r "$verified_marker" ]] && [[ "$(cat "$verified_marker")" == "$verified_marker_contents" ]]
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}
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if [[ -z "$musl_cc" ]]; then
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ensure_private_cache_dir "$musl_cross_root" || return 1
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ensure_private_cache_dir "$install_root" || return 1
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fi
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if [[ -z "$musl_cc" && -L "$toolchain_dir" ]]; then
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echo "Error: cached musl toolchain path '$toolchain_dir' must not be a symlink." >&2
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return 1
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fi
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if [[ -z "$musl_cc" ]]; then
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if [[ -d "$toolchain_dir" ]] && ! cached_toolchain_is_verified; then
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echo "Ignoring unverified cached musl toolchain at '$toolchain_dir'." >&2
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fi
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if cached_toolchain_is_verified \
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&& [[ -x "$toolchain_bin/$target-gcc" ]] \
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&& [[ -x "$toolchain_bin/$target-g++" ]] \
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&& [[ -x "$toolchain_bin/$target-strip" ]]; then
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case ":$PATH:" in
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*":$toolchain_bin:"*) ;;
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*) export PATH="$toolchain_bin:$PATH" ;;
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esac
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musl_cc="$(command -v "$target-gcc")"
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musl_cxx="$(command -v "$target-g++")"
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musl_strip="$(command -v "$target-strip")"
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fi
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fi
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if [[ -z "$musl_cc" ]]; then
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if [[ "$(uname -s)" != "Linux" ]]; then
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echo "Error: no complete C and C++ toolchain for '$target' was found on PATH." >&2
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echo "Automatic musl-cross installation is only supported on Linux." >&2
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return 1
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fi
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if [[ "$(uname -m)" != "x86_64" ]]; then
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echo "Error: automatic musl-cross installation is only supported on x86_64 hosts." >&2
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return 1
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fi
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local required_command
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for required_command in curl sha256sum tar; do
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if ! command -v "$required_command" &>/dev/null; then
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echo "Error: '$required_command' is required to install the musl toolchain." >&2
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return 1
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fi
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done
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local archive_name="$target.tar.xz"
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local archive_url="https://github.com/cross-tools/musl-cross/releases/download/$musl_cross_tag/$archive_name"
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if ! (
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download_dir=""
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cleanup_download() {
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if [[ -n "$download_dir" && -d "$download_dir" ]]; then
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chmod -R u+w "$download_dir" 2>/dev/null || true
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rm -rf "$download_dir"
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fi
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}
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trap cleanup_download EXIT
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ensure_private_cache_dir "$musl_cross_root" || exit 1
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ensure_private_cache_dir "$install_root" || exit 1
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download_dir="$(mktemp -d "$musl_cross_root/.download-$target.XXXXXX")" || exit 1
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echo "Downloading the $target C and C++ toolchain to $toolchain_dir"
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curl -fsSL --retry 3 "$archive_url" -o "$download_dir/$archive_name" || exit 1
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printf '%s %s\n' "$musl_cross_sha256" "$download_dir/$archive_name" | sha256sum -c - || exit 1
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tar -xf "$download_dir/$archive_name" -C "$download_dir" || exit 1
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if [[ ! -x "$download_dir/$target/bin/$target-gcc" \
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|| ! -x "$download_dir/$target/bin/$target-g++" \
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|| ! -x "$download_dir/$target/bin/$target-strip" ]]; then
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echo "Error: the downloaded archive does not contain the expected C, C++, and strip tools." >&2
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exit 1
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fi
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chmod -R u+w,go-w "$download_dir/$target" || exit 1
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printf '%s\n' "$verified_marker_contents" > "$download_dir/$target/.warp-musl-cross-verified" || exit 1
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if [[ -x "$toolchain_bin/$target-gcc" \
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&& -x "$toolchain_bin/$target-g++" \
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&& -x "$toolchain_bin/$target-strip" \
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&& -r "$verified_marker" \
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&& "$(cat "$verified_marker")" == "$verified_marker_contents" ]]; then
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exit 0
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fi
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if [[ -e "$toolchain_dir" ]]; then
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chmod -R u+w "$toolchain_dir" || exit 1
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rm -rf "$toolchain_dir" || exit 1
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fi
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mv "$download_dir/$target" "$toolchain_dir" || exit 1
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); then
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return 1
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fi
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case ":$PATH:" in
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*":$toolchain_bin:"*) ;;
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*) export PATH="$toolchain_bin:$PATH" ;;
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esac
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musl_cc="$(command -v "$target-gcc")"
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musl_cxx="$(command -v "$target-g++")"
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musl_strip="$(command -v "$target-strip")"
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fi
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local tool
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for tool in "$musl_cc" "$musl_cxx" "$musl_strip"; do
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if ! "$tool" --version &>/dev/null; then
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echo "Error: musl tool '$tool' cannot execute on this host." >&2
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return 1
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fi
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done
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local target_env="${target//-/_}"
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local cargo_target_env
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cargo_target_env="$(printf '%s' "$target" | tr '[:lower:]-' '[:upper:]_')"
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export "CC_$target_env=$musl_cc"
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export "CXX_$target_env=$musl_cxx"
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export "CARGO_TARGET_${cargo_target_env}_LINKER=$musl_cc"
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export WARP_MUSL_TARGET="$target"
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export WARP_MUSL_CC="$musl_cc"
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export WARP_MUSL_CXX="$musl_cxx"
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export WARP_MUSL_STRIP="$musl_strip"
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echo "Configured the $target toolchain with $musl_cc, $musl_cxx, and $musl_strip"
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}
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if [[ -n "${BASH_VERSION:-}" && "${BASH_SOURCE[0]}" == "$0" ]]; then
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echo "Error: source this script so it can configure the caller's environment." >&2
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exit 1
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fi
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if [[ -n "${ZSH_VERSION:-}" && "${ZSH_EVAL_CONTEXT:-}" != *:file ]]; then
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echo "Error: source this script so it can configure the caller's environment." >&2
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exit 1
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fi
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configure_musl_toolchain "$@"
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