Mercurial > infra / check.sh

 #!/usr/bin/env sh
 set -eu
 main() {
   need_cmd uname
   need_cmd mktemp
   need_cmd chmod
   need_cmd mkdir
   need_cmd rm
   need_cmd rmdir
   need_cmd tar
   need_cmd zstd
   need_cmd hg
   need_cmd git
   need_cmd clang
   need_cmd grep
   need_cmd awk
   need_cmd head
   need_cmd tail
   host_config_file=host.sxp
   rm $host_config_file
   check_mem
   check_disk
   check_mod kvm
   get_architecture || return 1
   local _arch="$RETVAL"
   assert_nz "$_arch" "arch"
   _write ";; -*- mode:skel -*-"
   _write ":arch \"$_arch\""
   kernel_version
   local _kernel_version="$RETVAL"
   _write ":kernel \"$_kernel_version\""
   check_cpus
   local _num_cpus="$RETVAL"
   _write ":cpus $_num_cpus"
   case "$_arch" in
     *windows*)
       _write ":ext \"exe\""
       ;;
     *)
       _write ":ext nil"
   esac
 }
 
 say() {
   printf '%s\n' "$1"
 }
 
 _write() {
   say "$1" >> $host_config_file
 }
 
 err() {
   say "$1" >&2
   exit 1
 }
 
 assert_nz() {
   if [ -z "$1" ]; then err "assert_nz $2"; fi
 }
 
 check_cmd() {
   command -v "$1" > /dev/null 2>&1
 }
 
 need_cmd() {
   if ! check_cmd "$1"; then
     err "need '$1' (command not found)"
   fi
 }
 
 ensure() {
   if ! "$@"; then err "command failed: $*"; fi
 }
 
 check_proc() {
   # Check for /proc by looking for the /proc/self/exe link
   # This is only run on Linux
   if ! test -L /proc/self/exe ; then
     err "fatal: Unable to find /proc/self/exe.  Is /proc mounted?  Installation cannot proceed without /proc."
   fi
 }
 
 get_bitness() {
   # Architecture detection without dependencies beyond coreutils.
   # ELF files start out "\x7fELF", and the following byte is
   #   0x01 for 32-bit and
   #   0x02 for 64-bit.
   # The printf builtin on some shells like dash only supports octal
   # escape sequences, so we use those.
   local _current_exe_head
   _current_exe_head=$(head -c 5 /proc/self/exe )
   if [ "$_current_exe_head" = "$(printf '\177ELF\001')" ]; then
     echo 32
   elif [ "$_current_exe_head" = "$(printf '\177ELF\002')" ]; then
     echo 64
   else
     err "unknown platform bitness"
   fi
 }
 
 is_host_amd64_elf() {
   # ELF e_machine detection without dependencies beyond coreutils.
   # Two-byte field at offset 0x12 indicates the CPU,
   # but we're interested in it being 0x3E to indicate amd64, or not that.
   local _current_exe_machine
   _current_exe_machine=$(head -c 19 /proc/self/exe | tail -c 1)
   [ "$_current_exe_machine" = "$(printf '\076')" ]
 }
 
 get_endianness() {
   local cputype=$1
   local suffix_eb=$2
   local suffix_el=$3
 
   # detect endianness without od/hexdump, like get_bitness() does.
   local _current_exe_endianness
   _current_exe_endianness="$(head -c 6 /proc/self/exe | tail -c 1)"
   if [ "$_current_exe_endianness" = "$(printf '\001')" ]; then
     echo "${cputype}${suffix_el}"
   elif [ "$_current_exe_endianness" = "$(printf '\002')" ]; then
     echo "${cputype}${suffix_eb}"
   else
     err "unknown platform endianness"
   fi
 }
 
 get_architecture() {
   local _ostype _cputype _bitness _arch _clibtype
   _ostype="$(uname -s)"
   _cputype="$(uname -m)"
   _clibtype="gnu"
 
   if [ "$_ostype" = Linux ]; then
     if [ "$(uname -o)" = Android ]; then
       _ostype=Android
     fi
     if ldd --version 2>&1 | grep -q 'musl'; then
       _clibtype="musl"
     fi
   fi
 
   if [ "$_ostype" = Darwin ] && [ "$_cputype" = i386 ]; then
     # Darwin `uname -m` lies
     if sysctl hw.optional.x86_64 | grep -q ': 1'; then
       _cputype=x86_64
     fi
   fi
 
   if [ "$_ostype" = SunOS ]; then
     # Both Solaris and illumos presently announce as "SunOS" in "uname -s"
     # so use "uname -o" to disambiguate.  We use the full path to the
     # system uname in case the user has coreutils uname first in PATH,
     # which has historically sometimes printed the wrong value here.
     if [ "$(/usr/bin/uname -o)" = illumos ]; then
       _ostype=illumos
     fi
 
     # illumos systems have multi-arch userlands, and "uname -m" reports the
     # machine hardware name; e.g., "i86pc" on both 32- and 64-bit x86
     # systems.  Check for the native (widest) instruction set on the
     # running kernel:
     if [ "$_cputype" = i86pc ]; then
       _cputype="$(isainfo -n)"
     fi
   fi
 
   case "$_ostype" in
 
     Android)
       _ostype=linux-android
       ;;
 
     Linux)
       check_proc
       _ostype=unknown-linux-$_clibtype
       _bitness=$(get_bitness)
       ;;
 
     FreeBSD)
       _ostype=unknown-freebsd
       ;;
 
     NetBSD)
       _ostype=unknown-netbsd
       ;;
 
     DragonFly)
       _ostype=unknown-dragonfly
       ;;
 
     Darwin)
       _ostype=apple-darwin
       ;;
 
     illumos)
       _ostype=unknown-illumos
       ;;
 
     MINGW* | MSYS* | CYGWIN* | Windows_NT)
       _ostype=pc-windows-gnu
       ;;
 
     *)
       err "unrecognized OS type: $_ostype"
       ;;
 
   esac
 
   case "$_cputype" in
 
     i386 | i486 | i686 | i786 | x86)
       _cputype=i686
       ;;
 
     xscale | arm)
       _cputype=arm
       if [ "$_ostype" = "linux-android" ]; then
         _ostype=linux-androideabi
       fi
       ;;
 
     armv6l)
       _cputype=arm
       if [ "$_ostype" = "linux-android" ]; then
         _ostype=linux-androideabi
       else
         _ostype="${_ostype}eabihf"
       fi
       ;;
 
     armv7l | armv8l)
       _cputype=armv7
       if [ "$_ostype" = "linux-android" ]; then
         _ostype=linux-androideabi
       else
         _ostype="${_ostype}eabihf"
       fi
       ;;
 
     aarch64 | arm64)
       _cputype=aarch64
       ;;
 
     x86_64 | x86-64 | x64 | amd64)
       _cputype=x86_64
       ;;
 
     mips)
       _cputype=$(get_endianness mips '' el)
       ;;
 
     mips64)
       if [ "$_bitness" -eq 64 ]; then
         # only n64 ABI is supported for now
         _ostype="${_ostype}abi64"
         _cputype=$(get_endianness mips64 '' el)
       fi
       ;;
 
     ppc)
       _cputype=powerpc
       ;;
 
     ppc64)
       _cputype=powerpc64
       ;;
 
     ppc64le)
       _cputype=powerpc64le
       ;;
 
     s390x)
       _cputype=s390x
       ;;
     riscv64)
       _cputype=riscv64gc
       ;;
     loongarch64)
       _cputype=loongarch64
       ;;
     *)
       err "unknown CPU type: $_cputype"
 
   esac
 
   # Detect 64-bit linux with 32-bit userland
   if [ "${_ostype}" = unknown-linux-gnu ] && [ "${_bitness}" -eq 32 ]; then
     case $_cputype in
       x86_64)
         if [ -n "${CPUTYPE:-}" ]; then
           _cputype="$CPUTYPE"
         else {
           # 32-bit executable for amd64 = x32
           if is_host_amd64_elf; then {
             echo "This host is running an x32 userland; as it stands, x32 support is poor," 1>&2
             echo "and there isn't a native toolchain -- you will have to install" 1>&2
             echo "multiarch compatibility with i686 and/or amd64, then select one" 1>&2
             echo "by re-running this script with the CPUTYPE environment variable" 1>&2
             echo "set to i686 or x86_64, respectively." 1>&2
             exit 1
           }; else
             _cputype=i686
           fi
         }; fi
         ;;
       mips64)
         _cputype=$(get_endianness mips '' el)
         ;;
       powerpc64)
         _cputype=powerpc
         ;;
       aarch64)
         _cputype=armv7
         if [ "$_ostype" = "linux-android" ]; then
           _ostype=linux-androideabi
         else
           _ostype="${_ostype}eabihf"
         fi
         ;;
       riscv64gc)
         err "riscv64 with 32-bit userland unsupported"
         ;;
     esac
   fi
 
   if [ "$_ostype" = "unknown-linux-gnueabihf" ] && [ "$_cputype" = armv7 ]; then
     if ensure grep '^Features' /proc/cpuinfo | grep -q -v neon; then
       # At least one processor does not have NEON.
       _cputype=arm
     fi
   fi
 
   _arch="${_cputype}-${_ostype}"
 
   RETVAL="$_arch"
 }
 
 mem_total () {
   local _mem_total
   _mem_total=$(awk '/MemTotal/ {print $2}' /proc/meminfo)
   RETVAL="$_mem_total"
 }
 
 check_mem () {
   mem_total
   local _mem_total="$RETVAL"
   local _mem_min=8388608 # 8Gb in kB
   if [ "$_mem_total" -lt "$_mem_min" ]; then
     err "not enough memory: $_mem_total < $_mem_min";
   fi
 }
 
 disk_free () {
   local _disk_free
   _disk_free=$(df -kh . | tail -n1 | awk '{print $4}')
   RETVAL="${_disk_free%?}"
 }
 
 check_disk () {
   disk_free
   local _disk_free="$RETVAL"
   local _disk_min=32 # in Gigabytes
   if [ "$_disk_free" -lt "$_disk_min" ]; then
     err "not enough disk space: $_disk_free < $_disk_min"
   fi
 }
 
 kernel_version () {
   local _kernel_version
   _kernel_version=$(uname -r)
   RETVAL="$_kernel_version"
 }
 
 check_mod () {
   if ! lsmod | grep -wq "$1"; then
     err "kernel module $1 isn't loaded"
   fi
 }
 
 num_cpus () {
   local _num_cpus
   _num_cpus=$(grep -c '^processor' /proc/cpuinfo 2>/dev/null)
   RETVAL="$_num_cpus"
   # sysctl -n hw.ncpu # nproc --all
 }
 
 check_cpus () {
   num_cpus
   local _num_cpus="$RETVAL"
   local _min_cpus=8
   if [ "$_num_cpus" -lt "$_min_cpus" ]; then
     err "not enough cpu threads ($_num_cpus < $_min_cpus)"
   fi
 }
 
 main "$@" || exit 1