forked from lix-project/lix-installer
473 lines
15 KiB
Bash
Executable file
473 lines
15 KiB
Bash
Executable file
#!/bin/sh
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# shellcheck shell=dash
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# This script is based off https://github.com/rust-lang/rustup/blob/8f6b53628ad996ad86f9c6225fa500cddf860905/rustup-init.sh
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# This is just a little script that can be downloaded from the internet to
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# install `nix-install`. It just does platform detection, downloads the installer
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# and runs it.
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# It runs on Unix shells like {a,ba,da,k,z}sh. It uses the common `local`
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# extension. Note: Most shells limit `local` to 1 var per line, contra bash.
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if [ "$KSH_VERSION" = 'Version JM 93t+ 2010-03-05' ]; then
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# The version of ksh93 that ships with many illumos systems does not
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# support the "local" extension. Print a message rather than fail in
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# subtle ways later on:
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echo 'harmonic does not work with this ksh93 version; please try bash!' >&2
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exit 1
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fi
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set -u
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# If NIX_INSTALL_UPDATE_ROOT is unset or empty, default it.
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NIX_INSTALL_UPDATE_ROOT="${NIX_INSTALL_UPDATE_ROOT:-https://install.determinate.systems}"
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main() {
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downloader --check
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need_cmd uname
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need_cmd mktemp
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need_cmd chmod
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need_cmd mkdir
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need_cmd rm
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need_cmd rmdir
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get_architecture || return 1
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local _arch="$RETVAL"
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assert_nz "$_arch" "arch"
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local _ext=""
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case "$_arch" in
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*windows*)
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_ext=".exe"
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;;
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esac
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local _url="${NIX_INSTALL_OVERRIDE_URL-${NIX_INSTALL_UPDATE_ROOT}/harmonic-${_arch}${_ext}}"
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local _dir
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if ! _dir="$(ensure mktemp -d)"; then
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# Because the previous command ran in a subshell, we must manually
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# propagate exit status.
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exit 1
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fi
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local _file="${_dir}/nix-install${_ext}"
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local _ansi_escapes_are_valid=false
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if [ -t 2 ]; then
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if [ "${TERM+set}" = 'set' ]; then
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case "$TERM" in
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xterm*|rxvt*|urxvt*|linux*|vt*)
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_ansi_escapes_are_valid=true
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;;
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esac
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fi
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fi
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# check if we have to use /dev/tty to prompt the user
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local need_tty=yes
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for arg in "$@"; do
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case "$arg" in
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--no-confirm)
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need_tty=no
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;;
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*)
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continue
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;;
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esac
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done
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if $_ansi_escapes_are_valid; then
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printf "\33[1minfo:\33[0m downloading installer \33[4m%s\33[0m\n" "$_url" 1>&2
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else
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printf 'info: downloading installer (%s)\n' "$_url" 1>&2
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fi
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ensure mkdir -p "$_dir"
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ensure downloader "$_url" "$_file" "$_arch"
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ensure chmod u+x "$_file"
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if [ ! -x "$_file" ]; then
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printf '%s\n' "Cannot execute $_file (likely because of mounting /tmp as noexec)." 1>&2
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printf '%s\n' "Please copy the file to a location where you can execute binaries and run ./nix-install${_ext}." 1>&2
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exit 1
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fi
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if [ "$need_tty" = "yes" ] && [ ! -t 0 ]; then
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# The installer is going to want to ask for confirmation by
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# reading stdin. This script was piped into `sh` though and
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# doesn't have stdin to pass to its children. Instead we're going
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# to explicitly connect /dev/tty to the installer's stdin.
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if [ ! -t 1 ]; then
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err "Unable to run interactively. Run with -y to accept defaults, --help for additional options"
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fi
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ignore "$_file" "$@" < /dev/tty
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else
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ignore "$_file" "$@"
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fi
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local _retval=$?
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ignore rm "$_file"
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ignore rmdir "$_dir"
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return "$_retval"
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}
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check_proc() {
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# Check for /proc by looking for the /proc/self/exe link
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# This is only run on Linux
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if ! test -L /proc/self/exe ; then
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err "fatal: Unable to find /proc/self/exe. Is /proc mounted? Installation cannot proceed without /proc."
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fi
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}
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get_architecture() {
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local _ostype _cputype _arch
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_ostype="$(uname -s)"
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_cputype="$(uname -m)"
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if [ "$_ostype" = Linux ]; then
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if [ "$(uname -o)" = Android ]; then
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_ostype=Android
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fi
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if ldd --version 2>&1 | grep -q 'musl'; then
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_clibtype="musl"
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fi
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fi
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if [ "$_ostype" = Darwin ] && [ "$_cputype" = i386 ]; then
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# Darwin `uname -m` lies
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if sysctl hw.optional.x86_64 | grep -q ': 1'; then
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_cputype=x86_64
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fi
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fi
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if [ "$_ostype" = SunOS ]; then
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# Both Solaris and illumos presently announce as "SunOS" in "uname -s"
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# so use "uname -o" to disambiguate. We use the full path to the
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# system uname in case the user has coreutils uname first in PATH,
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# which has historically sometimes printed the wrong value here.
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if [ "$(/usr/bin/uname -o)" = illumos ]; then
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_ostype=illumos
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fi
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# illumos systems have multi-arch userlands, and "uname -m" reports the
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# machine hardware name; e.g., "i86pc" on both 32- and 64-bit x86
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# systems. Check for the native (widest) instruction set on the
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# running kernel:
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if [ "$_cputype" = i86pc ]; then
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_cputype="$(isainfo -n)"
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fi
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fi
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case "$_ostype" in
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Linux)
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check_proc
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_ostype=linux
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;;
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Darwin)
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_ostype=darwin
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;;
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*)
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err "unrecognized OS type: $_ostype"
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;;
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esac
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case "$_cputype" in
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aarch64 | arm64)
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_cputype=aarch64
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;;
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x86_64 | x86-64 | x64 | amd64)
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_cputype=x86_64
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;;
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*)
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err "unknown CPU type: $_cputype"
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;;
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esac
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_arch="${_cputype}-${_ostype}"
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RETVAL="$_arch"
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}
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say() {
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printf 'harmonic: %s\n' "$1"
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}
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err() {
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say "$1" >&2
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exit 1
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}
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need_cmd() {
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if ! check_cmd "$1"; then
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err "need '$1' (command not found)"
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fi
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}
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check_cmd() {
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command -v "$1" > /dev/null 2>&1
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}
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assert_nz() {
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if [ -z "$1" ]; then err "assert_nz $2"; fi
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}
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# Run a command that should never fail. If the command fails execution
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# will immediately terminate with an error showing the failing
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# command.
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ensure() {
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if ! "$@"; then err "command failed: $*"; fi
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}
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# This is just for indicating that commands' results are being
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# intentionally ignored. Usually, because it's being executed
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# as part of error handling.
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ignore() {
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"$@"
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}
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# This wraps curl or wget. Try curl first, if not installed,
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# use wget instead.
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downloader() {
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local _dld
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local _ciphersuites
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local _err
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local _status
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local _retry
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if check_cmd curl; then
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_dld=curl
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elif check_cmd wget; then
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_dld=wget
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else
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_dld='curl or wget' # to be used in error message of need_cmd
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fi
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if [ "$1" = --check ]; then
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need_cmd "$_dld"
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elif [ "$_dld" = curl ]; then
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check_curl_for_retry_support
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_retry="$RETVAL"
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get_ciphersuites_for_curl
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_ciphersuites="$RETVAL"
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if [ -n "$_ciphersuites" ]; then
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if [ -n "${NIX_INSTALL_FORCE_ALLOW_HTTP-}" ]; then
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_err=$(curl $_retry --silent --show-error --fail --location "$1" --output "$2" 2>&1)
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else
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_err=$(curl $_retry --proto '=https' --tlsv1.2 --ciphers "$_ciphersuites" --silent --show-error --fail --location "$1" --output "$2" 2>&1)
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fi
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_status=$?
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else
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echo "Warning: Not enforcing strong cipher suites for TLS, this is potentially less secure"
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if ! check_help_for "$3" curl --proto --tlsv1.2; then
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echo "Warning: Not enforcing TLS v1.2, this is potentially less secure"
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_err=$(curl $_retry --silent --show-error --fail --location "$1" --output "$2" 2>&1)
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_status=$?
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else
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_err=$(curl $_retry --proto '=https' --tlsv1.2 --silent --show-error --fail --location "$1" --output "$2" 2>&1)
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_status=$?
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fi
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fi
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if [ -n "$_err" ]; then
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echo "$_err" >&2
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if echo "$_err" | grep -q 404$; then
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err "installer for platform '$3' not found, this may be unsupported"
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fi
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fi
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return $_status
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elif [ "$_dld" = wget ]; then
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if [ "$(wget -V 2>&1|head -2|tail -1|cut -f1 -d" ")" = "BusyBox" ]; then
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echo "Warning: using the BusyBox version of wget. Not enforcing strong cipher suites for TLS or TLS v1.2, this is potentially less secure"
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_err=$(wget "$1" -O "$2" 2>&1)
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_status=$?
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else
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get_ciphersuites_for_wget
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_ciphersuites="$RETVAL"
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if [ -n "$_ciphersuites" ]; then
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_err=$(wget --https-only --secure-protocol=TLSv1_2 --ciphers "$_ciphersuites" "$1" -O "$2" 2>&1)
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_status=$?
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else
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echo "Warning: Not enforcing strong cipher suites for TLS, this is potentially less secure"
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if ! check_help_for "$3" wget --https-only --secure-protocol; then
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echo "Warning: Not enforcing TLS v1.2, this is potentially less secure"
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_err=$(wget "$1" -O "$2" 2>&1)
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_status=$?
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else
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_err=$(wget --https-only --secure-protocol=TLSv1_2 "$1" -O "$2" 2>&1)
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_status=$?
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fi
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fi
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fi
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if [ -n "$_err" ]; then
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echo "$_err" >&2
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if echo "$_err" | grep -q ' 404 Not Found$'; then
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err "installer for platform '$3' not found, this may be unsupported"
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fi
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fi
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return $_status
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else
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err "Unknown downloader" # should not reach here
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fi
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}
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check_help_for() {
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local _arch
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local _cmd
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local _arg
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_arch="$1"
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shift
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_cmd="$1"
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shift
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local _category
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if "$_cmd" --help | grep -q 'For all options use the manual or "--help all".'; then
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_category="all"
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else
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_category=""
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fi
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case "$_arch" in
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*darwin*)
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if check_cmd sw_vers; then
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case $(sw_vers -productVersion) in
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10.*)
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# If we're running on macOS, older than 10.13, then we always
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# fail to find these options to force fallback
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if [ "$(sw_vers -productVersion | cut -d. -f2)" -lt 13 ]; then
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# Older than 10.13
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echo "Warning: Detected macOS platform older than 10.13"
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return 1
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fi
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;;
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11.*)
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# We assume Big Sur will be OK for now
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;;
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*)
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# Unknown product version, warn and continue
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echo "Warning: Detected unknown macOS major version: $(sw_vers -productVersion)"
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echo "Warning TLS capabilities detection may fail"
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;;
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esac
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fi
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;;
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esac
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for _arg in "$@"; do
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if ! "$_cmd" --help $_category | grep -q -- "$_arg"; then
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return 1
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fi
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done
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true # not strictly needed
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}
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# Check if curl supports the --retry flag, then pass it to the curl invocation.
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check_curl_for_retry_support() {
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local _retry_supported=""
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# "unspecified" is for arch, allows for possibility old OS using macports, homebrew, etc.
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if check_help_for "notspecified" "curl" "--retry"; then
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_retry_supported="--retry 3"
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fi
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RETVAL="$_retry_supported"
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}
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# Return cipher suite string specified by user, otherwise return strong TLS 1.2-1.3 cipher suites
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# if support by local tools is detected. Detection currently supports these curl backends:
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# GnuTLS and OpenSSL (possibly also LibreSSL and BoringSSL). Return value can be empty.
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get_ciphersuites_for_curl() {
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if [ -n "${RUSTUP_TLS_CIPHERSUITES-}" ]; then
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# user specified custom cipher suites, assume they know what they're doing
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RETVAL="$RUSTUP_TLS_CIPHERSUITES"
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return
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fi
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local _openssl_syntax="no"
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local _gnutls_syntax="no"
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local _backend_supported="yes"
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if curl -V | grep -q ' OpenSSL/'; then
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_openssl_syntax="yes"
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elif curl -V | grep -iq ' LibreSSL/'; then
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_openssl_syntax="yes"
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elif curl -V | grep -iq ' BoringSSL/'; then
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_openssl_syntax="yes"
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elif curl -V | grep -iq ' GnuTLS/'; then
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_gnutls_syntax="yes"
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else
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_backend_supported="no"
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fi
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local _args_supported="no"
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if [ "$_backend_supported" = "yes" ]; then
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# "unspecified" is for arch, allows for possibility old OS using macports, homebrew, etc.
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if check_help_for "notspecified" "curl" "--tlsv1.2" "--ciphers" "--proto"; then
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_args_supported="yes"
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fi
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fi
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local _cs=""
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if [ "$_args_supported" = "yes" ]; then
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if [ "$_openssl_syntax" = "yes" ]; then
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_cs=$(get_strong_ciphersuites_for "openssl")
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elif [ "$_gnutls_syntax" = "yes" ]; then
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_cs=$(get_strong_ciphersuites_for "gnutls")
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fi
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fi
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RETVAL="$_cs"
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}
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# Return cipher suite string specified by user, otherwise return strong TLS 1.2-1.3 cipher suites
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# if support by local tools is detected. Detection currently supports these wget backends:
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# GnuTLS and OpenSSL (possibly also LibreSSL and BoringSSL). Return value can be empty.
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get_ciphersuites_for_wget() {
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if [ -n "${RUSTUP_TLS_CIPHERSUITES-}" ]; then
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# user specified custom cipher suites, assume they know what they're doing
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RETVAL="$RUSTUP_TLS_CIPHERSUITES"
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return
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fi
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local _cs=""
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if wget -V | grep -q '\-DHAVE_LIBSSL'; then
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# "unspecified" is for arch, allows for possibility old OS using macports, homebrew, etc.
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if check_help_for "notspecified" "wget" "TLSv1_2" "--ciphers" "--https-only" "--secure-protocol"; then
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_cs=$(get_strong_ciphersuites_for "openssl")
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fi
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elif wget -V | grep -q '\-DHAVE_LIBGNUTLS'; then
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# "unspecified" is for arch, allows for possibility old OS using macports, homebrew, etc.
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if check_help_for "notspecified" "wget" "TLSv1_2" "--ciphers" "--https-only" "--secure-protocol"; then
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_cs=$(get_strong_ciphersuites_for "gnutls")
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fi
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fi
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RETVAL="$_cs"
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}
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# Return strong TLS 1.2-1.3 cipher suites in OpenSSL or GnuTLS syntax. TLS 1.2
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# excludes non-ECDHE and non-AEAD cipher suites. DHE is excluded due to bad
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# DH params often found on servers (see RFC 7919). Sequence matches or is
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# similar to Firefox 68 ESR with weak cipher suites disabled via about:config.
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# $1 must be openssl or gnutls.
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get_strong_ciphersuites_for() {
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if [ "$1" = "openssl" ]; then
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# OpenSSL is forgiving of unknown values, no problems with TLS 1.3 values on versions that don't support it yet.
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echo "TLS_AES_128_GCM_SHA256:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_256_GCM_SHA384:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384"
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elif [ "$1" = "gnutls" ]; then
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# GnuTLS isn't forgiving of unknown values, so this may require a GnuTLS version that supports TLS 1.3 even if wget doesn't.
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# Begin with SECURE128 (and higher) then remove/add to build cipher suites. Produces same 9 cipher suites as OpenSSL but in slightly different order.
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echo "SECURE128:-VERS-SSL3.0:-VERS-TLS1.0:-VERS-TLS1.1:-VERS-DTLS-ALL:-CIPHER-ALL:-MAC-ALL:-KX-ALL:+AEAD:+ECDHE-ECDSA:+ECDHE-RSA:+AES-128-GCM:+CHACHA20-POLY1305:+AES-256-GCM"
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fi
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}
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main "$@" || exit 1
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