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#!/bin/sh
#
# This script is used to derive compiler flags and filesystem paths
# necessary to utilize Lua, LuaJIT, and particular versions thereof in both
# simple and mixed installation environments.
#
# For usage help information use the -h switch.
#
# This script attempts to adhere strictly to POSIX shell specifications. The
# known non-POSIX features used are the path of the shell at the very first
# line of this script, the default compiler command name of `cc' instead of
# `c99', and the use of /dev/urandom for generating a random sandbox
# directory suffix. All of these can be override. For any other issues
# please contact the author.
#
# WARNING: When searching for a Lua interpreter this script may execute
# various utilities in an attempt to deduce their fitness and release
# version. By default this script will search for and execute utilities
# using the glob patterns luac* and lua*. But this script CANNOT GUARANTEE
# that executing such utilities, or any other utilities, either wittingly or
# unwittingly, will not result in your COMPUTER EXPLODING. You have been
# warned.
#
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#
# Changelog:
#
# * 2013-08-02 - Published. Derived from an earlier script, lua.path,
# written for the cqueues project.
#
# * 2013-08-05 - Redirect stdin from /dev/null when probing so we don't
# freeze if a utility tries to read from stdin.
#
# chdir to a read-only directory by default to try to prevent creation
# of temporary files. These features address the issues of LuaTeX
# reading from stdin and creating a luatex.out file in the current
# working directory. By default a directory with a random suffix
# generated from /dev/urandom is placed in TMPDIR and removed on exit.
#
# If CPPFLAGS is empty and no -I options directly specified then set
# INCDIRS to "/usr/include:/usr/local/include".
#
# * 2013-08-07 - Add pkg-config support and refactor header probing to delay
# recursive searching.
#
# * 2013-09-09 - NetBSD's sh gets upset over the noclobber option and
# redirection to /dev/null, so use append operator. And check $#
# before iterating over a null parameter set with `do X; ... done`
# when `set -u` is enabled--it complains about $@ being unset.
#
# * 2013-10-22 - Initial ldflags detection.
#
# * 2014-01-26 - Migrate CC vendor detection from external script.
#
# * 2014-09-29 - Add ldir and cdir modes which print install path by parsing
# package.path and package.cpath.
#
# * 2014-12-18 - Add -e GLOB option.
#
# Deprecate ldir and cdir modes.
#
# Add package.path and package.cpath to replace ldir and dir modes.
# Optional arguments to the new modes are preferred install paths,
# rather than globs for finding the lua utility path (use the new -e
# option, instead).
#
# * 2014-12-19 - Fix pkg-config version matching. The --modversion of
# the lua package might be stale. For example, it's 5.2.0 on Ubuntu
# 14.04 even though the Lua release is 5.2.3.
#
# Use the interpreter path as a reference point when searching for
# headers. $(dirname ${LUA_PATH})/../include is a very likely location
# as bindir and includedir have the same prefix in most installations.
#
# * 2015-01-15 - Quote more command names and arguments. Still need to
# handle space characters in code that employs command substitution. I
# think we could handle all whitespace characters, including newlines,
# by using a control character in IFS and using --exec printf "%s\1" {}
# rather than -print with find(1).
#
# * 2015-01-19 - Add fix for LuaJIT's default package.cpath, which tends to
# hardcode /usr/local/lib/lua/5.1, ordered before the LuaJIT
# installation prefix.
#
# * 2015-07-14 - Add recursive glob function implemented in shell code
# and use instead of find(1).
#
# * 2016-03-18 - Fix bug in tryluac where a continue statement was used
# instead of return 0.
#
# * 2016-03-25 - Support ${CC} values with trailing flags, which invoke
# the compiler through env(1), or which otherwise are intended to
# expand as multiple words.
#
# OpenBSD 5.8 sh does not suppress strict errors within an eval
# invoked from an if condition compound-list. Workaround by changing
# trylua to return 0 on matching failure, like tryluainclude and
# tryluac do.
#
# Undeprecate ldir and cdir. The names are more intuitive and
# convenient as evidenced by the fact that I keep using them instead
# of package.path and package.cpath. Try to maintain backwards
# compatibility by using a simple heuristic to differentiate lua
# interpreter glob patterns from preferred install directory
# string.match expressions.
#
# * 2016-10-10 - Fix issue with passing empty CPPFLAGS to ${CC}. /usr/bin/cc
# in NetBSD 7.0.1 does not tolerate an empty string argument. This
# exposed a bug in NetBSD's and FreeBSD's /bin/sh, triggered by how we
# pass CPPFLAGS (see evalmacro and runcc routines, below).
#
# Some Ash variants (confirmed /bin/sh in NetBSD 7.0.1 and FreeBSD
# 10.1) will expand unquoted ${UNSET-} and ${UNSET:-} as an empty
# string rather than eliding it during argument processing. That is,
#
# nargs() { printf "%d\n" "$#"; }
# nargs ${UNSET} 2 3
# nargs ${UNSET-} 2 3
#
# prints "2" and "3", whereas every other shell tested prints "2" and
# "2" (confirmed dash in Ubuntu Xenial; bash 4.3 in Ubuntu Xenial;
# pdksh in FreeBSD 10.1, NetBSD 7.0, OS X 10.1, OpenBSD 6.0; ksh93 in
# Solaris 11.3 and AIX 7.1; ksh88 in AIX 7.1).
#
# A workaround in set -u mode (where unbound variable expansion aborts
# execution) is to substitute a known empty value. E.g.
#
# EMPTY=
# nargs ${UNSET-$EMPTY}
#
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#
# Copyright (C) 2012-2016 William Ahern
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
#
set -e # strict errors
set -u # don't expand unbound variables
set -f # disable pathname expansion
set -C # noclobber
\unalias -a # no command surprises
export LC_ALL=C # no locale headaches
unset IFS # no field splitting surprises
: ${TMPDIR:=/tmp} # sane TMPDIR
: ${CC:=cc}
unset LUA_PATH || true # interferes search for module install directory
unset LUA_CPATH || true
MYVERSION=20161010
MYVENDOR="william@25thandClement.com"
EMPTY= # empty string for parameter expansion workaround for Ash bug
DEVRANDOM=/dev/urandom
SANDBOX="${TMPDIR}/${0##*/}-"
CPPDIRS= # -I directories from CPPFLAGS
INCDIRS=
LDDIRS= # -L directories from LDFLAGS
LIBDIRS=
BINDIRS=
RECURSE=no
MAXDEPTH=5 # maximum recursion depth
SHORTEST= # continue searching until shortest pathname found
PKGCONFIG= # path to pkg-config, found by `command -v` when -k option invoked
GLOB= # -e GLOB expression for lua, luac, ldir, and cdir
GLOB_LUA="lua:lua[5-9]*:lua-[5-9]*:luajit*"
GLOB_LUAC="luac:luac[5-9]*:luac-[5-9]*"
API_MIN=500
API_MAX=999
API_VER=
API_DIR=
JIT_REQ=
JIT_MIN=20000
JIT_MAX=99999
JIT_VER=
JIT_DIR=
LIBLUA_VER=
LIBLUA_DIR=
LIBLUA_LIB=
LIBJIT_VER=
LIBJIT_DIR=
LIBJIT_LIB=
LUAC_PATH=
LUAC_VER=
LUA_PATH=
LUA_VER=
#
# warn FORMAT [...]
#
# Print message to original stderr.
#
exec 9>&2
warn() {
printf "%s: %.0s${1}\n" "${0##*/}" "$@" >&9
}
#
# panic FORMAT [...]
#
# Print message to original stderr, then exit with failure.
#
panic() {
warn "$@"
exit 1
}
#
# parse CPPFLAGS -I or LDFLAGS -L directories
#
xdirs() {
OPTC="${1:-I}"
DIRS=
set -- ${2:-}
while [ $# -gt 0 ]; do
case "${1}" in
-${OPTC})
shift
if [ -n "${1:-}" ]; then
DIRS="${DIRS}${DIRS:+:}${1}"
fi
;;
-${OPTC}*)
if [ "${1}" != "-${OPTC}" ]; then
DIRS="${DIRS}${DIRS:+:}${1#-${OPTC}}"
fi
;;
esac
shift
done
printf -- "${DIRS}"
}
idirs() {
xdirs "I" "${1:-}"
}
ldirs() {
xdirs "L" "${1:-}"
}
# count ":"-delimited substrings
count() {
IFS=:
set -- ${1:-}
unset IFS
printf "$#"
}
# append to ":"-delimited string variable
append() {
NAME=${1}
eval VALUE="\${${NAME}}"
shift
IFS=:
TMP="$*"
IFS="\n"
read -r "${NAME}" <<-EOF
${VALUE:-}${VALUE:+:}${TMP}
EOF
unset IFS
}
#
# glob PATTERN [MAXDEPTH] [EXEC-COMMAND] [INTERNAL:GLOB-COUNT]
#
glob() {
glob_N="${4:-0}"
IFS=
set +f
for F in ${1}; do
[ -e "${F}" ] || continue
if eval "${3:-printf '%s\\n'} \"\${F}\""; then
glob_N=$((${glob_N} + 1))
fi
done
set -f
unset IFS
if [ "${2-0}" -gt 0 ]; then
glob "${1%/*}/*/${1##*/}" "$((${2} - 1))" "${3:-}" "${glob_N}" || :
fi
[ "${glob_N}" -gt 0 ]
} # glob
#
# runcc [...]
#
# Wrapper for invoking ${CC}. Some build system include flags in ${CC},
# invoke the compiler through env(1), or employ other hacks.
#
# TODO: Optionally handle unescaping of words in a manner similar to how
# ${CC} would be evaluated from a make rule--typically by being passed
# through system(3).
#
runcc() {
(unset IFS; exec ${CC} "$@")
}
#
# evalmacro PATH MACRO [REGEX] [SUBST]
#
# PATH Header identifier--#include <PATH>
# MACRO Macro identifier
# REGEX Optional regex pattern to match macro evaluation result
# SUBST Optional replacement expression
#
evalmacro() {
printf "#include <$1>\n[===[$2]===]\n" \
| runcc ${CPPFLAGS:-${EMPTY}} -E - 2>>/dev/null \
| sed -ne "
s/^.*\\[===\\[ *\\(${3:-.*}\\) *\\]===\\].*$/${4:-\\1}/
t Found
d
:Found
p
q
"
}
#
# testsym PATH NAME
#
# Test whether global symbol NAME exists in object file at PATH. Exits with
# 0 (true) when found, non-0 (false) otherwise.
#
testsym() {
# NOTE: No -P for OpenBSD nm(1), but the default output format is
# close enough. Section types always have a leading and trailing
# space. U section type means undefined. On AIX [VWZ] are weak
# global symbols. Solaris and OS X have additional symbol types
# beyond the canonical POSIX/BSD types, all of which are uppercase
# and within [A-T].
(nm -Pg ${1} 2>>/dev/null || nm -g 2>>/dev/null) \
| sed -ne '/ [A-T] /p' \
| grep -q "${2}"
}
tryluainclude() {
V="$(evalmacro "${1}" LUA_VERSION_NUM '[0123456789][0123456789]*')"
: ${V:=0}
if [ "${1%/*}" != "${1}" ]; then
D="${1%/*}"
# cleanup after Solaris directory prune trick
if [ "${D##*/./}" != "${D}" ]; then
D="${D%%/./*}/${D##*/./}"
else
D="${D%/.}"
fi
else
D=
fi
[ "$V" -gt 0 -a "$V" -ge "${API_VER:-0}" ] || return 0
[ "$V" -gt "${API_VER:-0}" -o "${#D}" -lt "${#API_DIR}" -o \( "${JIT_REQ}" = "yes" -a "${JIT_VER:-0}" -lt "${JIT_MAX}" \) ] || return 0
[ "$V" -ge "${API_MIN}" -a "$V" -le "${API_MAX}" ] || return 0
if [ -n "${JIT_REQ}" ]; then
J="$(evalmacro "${1%%lua.h}luajit.h" LUAJIT_VERSION_NUM '[0123456789][0123456789]*')"
: ${J:=0}
if [ "${JIT_REQ}" = "skip" ]; then
[ "${J}" -eq 0 ] || return 0
elif [ "${JIT_REQ}" = "yes" ]; then
[ "$J" -ge "${JIT_VER:-0}" ] || return 0
[ "$J" -gt "${JIT_VER:-0}" -o "${#D}" -lt "${#JIT_DIR}" ] || return 0
[ "$J" -ge ${JIT_MIN} ] || return 0
[ "$J" -le "${JIT_MAX}" ] || return 0
JIT_VER="$J"
JIT_DIR="$D"
fi
fi
API_VER="$V"
API_DIR="$D"
}
#
# foundversion
#
# true if found the best (maximum) possible version, false otherwise
#
foundversion() {
if [ "${API_VER:-0}" -lt "${API_MAX}" ]; then
return 1
fi
if [ "${JIT_REQ}" = "yes" -a "${JIT_VER:-0}" -lt "${JIT_MAX}" ]; then
return 1
fi
if [ "${SHORTEST}" = "yes" ]; then
return 1
fi
return 0
}
#
# luapc
#
# wrapper around `pkg-config ... LIB`, where LIB is derived by
# searching for all libraries with "lua" in the name that have a
# --modversion equal to the release version printed by ${LUA_PATH} -v.
#
LUAPC_LIB=
luapc() {
[ -n "${LUA_PATH}" ] || return 0
[ -n "${PKGCONFIG}" ] || return 0
# find pkg-config library name
if [ -z "${LUAPC_LIB}" ]; then
V="$("${LUA_PATH}" -v </dev/null 2>&1 | head -n1 | sed -ne 's/^Lua[^ ]* \([0123456789][0123456789]*\(\.[0123456789][0123456789]*\)*\).*/\1/p')"
[ -n "${V}" ] || return 0
V_N=$(mmp2num "${V}")
for LIB in $("${PKGCONFIG}" --list-all </dev/null 2>>/dev/null | sed -ne 's/^\(lua[^ ]*\).*/\1/p'); do
M="$("${PKGCONFIG}" --modversion ${LIB} || true)"
# break immediately on exact match
if [ "${V}" = "${M}" ]; then
LUAPC_LIB="${LIB}"
break
fi
#
# NOTE: On Ubuntu 14.04 pkg-config --modversion
# lua5.2 prints 5.2.0 even though the release
# version is 5.2.3 (what lua5.2 -v prints).
#
# If the major.minor components match, then
# tentatively use that package name.
#
M_N=$(mmp2num "${M}" 0 0 0)
if [ "$((${V_N} / 100))" -eq "$((${M_N} / 100))" ]; then
LUAPC_LIB="${LIB}"
fi
done
[ -n "${LUAPC_LIB}" ] || return 0
fi
${PKGCONFIG} "$@" "${LUAPC_LIB}" </dev/null 2>>/dev/null || true
}
#
# findinstalldir package.path|package.cpath [preferred-path ...]
#
findinstalldir() {
V_DIR=$((${LUA_VER} / 100 % 100)).$((${LUA_VER} % 100))
if [ "${1}" = "package.cpath" -o "${1}" = "cdir" ]; then
ARRAY="package.cpath"
DIR="$(luapc --variable INSTALL_CMOD)"
[ -n "${DIR}" ] && set -- "$@" "${DIR}"
DIR="$(luapc --variable INSTALL_LIB)"
[ -n "${DIR}" ] && set -- "$@" "${DIR}/lua/${V_DIR}"
DIR="$(luapc --variable libdir)"
[ -n "${DIR}" ] && set -- "$@" "${DIR}/lua/${V_DIR}"
DIR="$(luapc --variable prefix)"
[ -n "${DIR}" ] && set -- "$@" "${DIR}/lib/lua/${V_DIR}"
# LuaJIT installations tend to include
# /usr/local/lib/lua/5.1 as one of the first paths, ordered
# before the LuaJIT installation prefix, and regardless of
# whether there exists a /usr/local/lib/lua/5.1.
set -- "$@" "${LUA_PATH}/../../lib/lua/${V_DIR}"
set -- "$@" "${LUA_PATH}/../../lib/*/lua/${V_DIR}" # e.g. lib/x86_64-linux-gnu
else
ARRAY="package.path"
DIR="$(luapc --variable INSTALL_LMOD)"
[ -n "${DIR}" ] && set -- "$@" "${DIR}"
DIR="$(luapc --variable prefix)"
[ -n "${DIR}" ] && set -- "$@" "${DIR}/share/lua/${V_DIR}"
# See above LuaJIT note. Although the built-in package.path
# usually orders the LuaJIT installation prefix first.
set -- "$@" "${LUA_PATH}/../../share/lua/${V_DIR}"
fi
shift
if [ $# -eq 0 ]; then
set -- "/nonexistent" # cannot expand empty $@ on some implementations
fi
"${LUA_PATH}" - "$@" <<-EOF
--
-- actual pkg-config variable on Ubuntu 14.04
--
-- /usr//share/lua/5.1
--
local function fixpath(path)
local stack = { path:match"^/" and "" or "." }
for ent in path:gmatch"([^/]+)" do
if ent == ".." and #stack > 1 then
stack[#stack] = nil
elseif ent ~= "." then
stack[#stack + 1] = ent
end
end
return table.concat(stack, "/")
end
local function topattern(path)
if string.match(path, "*") then
path = string.gsub(path, "%%", "%%")
return string.gsub(path, "*", "[^/]+")
end
end
local dirs = { }
for dir in ${ARRAY}:gmatch"([^;?]+)/" do
dir = fixpath(dir)
if dir ~= "." then
dirs[#dirs + 1] = dir
end
end
for _, arg in ipairs{ ... } do
arg = fixpath(arg)
local pat = topattern(arg)
for _, dir in ipairs(dirs) do
if arg == dir then
print(dir)
os.exit(0)
elseif pat and string.match(dir, pat) then
print(dir)
os.exit(0)
end
end
end
if dirs[1] then
print(dirs[1])
os.exit(0)
else
os.exit(1)
end
EOF
}
#
# findversion
#
findversion() {
tryluainclude "lua.h"
if foundversion; then
return 0
fi
# iterate through CPPFLAGS to probe different precedence
if [ "${API_VER:-0}" -lt "${API_MAX}" ]; then
IFS=:
set -- ${CPPDIRS}
unset IFS
if [ $# -gt 0 ]; then
for D; do
tryluainclude "${D}/lua.h"
if foundversion; then
return 0
fi
done
fi
fi
if [ -n "${PKGCONFIG}" ]; then
PKGFLAGS="$("${PKGCONFIG}" --list-all </dev/null 2>>/dev/null | sed -ne 's/^\(lua[^ ]*\).*/\1/p' | xargs -- ${PKGCONFIG} --cflags 2>>/dev/null | cat)"
PKGDIRS="$(idirs "${PKGFLAGS}")"
IFS=:
set -- ${PKGDIRS}
unset IFS
if [ $# -gt 0 ]; then
for D; do
tryluainclude "${D}/lua.h"
if foundversion; then
return 0
fi
done
fi
fi
IFS=:
set -- ${INCDIRS}
unset IFS
if [ $# -gt 0 ]; then
for D; do
tryluainclude "${D}/lua.h"
if foundversion; then
return 0
fi
done
fi
if [ "${RECURSE}" != "yes" ]; then
[ "${API_VER:-0}" -gt 0 ]
return $?
fi
# recurse into CPPDIRS
IFS=:
set -- ${CPPDIRS}
unset IFS
if [ $# -gt 0 ]; then
for D; do
glob "${D}/lua.h" "${MAXDEPTH}" tryluainclude || :
if foundversion; then
return 0
fi
done
fi
# recurse into INCDIRS
IFS=:
set -- ${INCDIRS}
unset IFS
if [ $# -gt 0 ]; then
for D; do
glob "${D}/lua.h" "${MAXDEPTH}" tryluainclude || :
if foundversion; then
return 0
fi
done
fi
# if we can find the lua interpreter, use it as a reference for
# header locations.
if findlua; then
D="${LUA_PATH%/*}"
D="${D%/*}/include"
if [ -d "${D}" ]; then
glob "${D}/lua.h" "${MAXDEPTH}" tryluainclude || :
if foundversion; then
return 0
fi
fi
fi
[ "${API_VER:-0}" -gt 0 ]
}
#
# Unlike API version checking, this is less likely to be accurately forward
# compatible.
#
trylib() {
testsym "${1}" "lua_newstate" || return 1
# exclude C++
[ "${1#*++}" = "${1}" ] || return 1
V=0
J=0
D=
F="${1##*/}"
L=
if [ "${1%/*}" != "${1}" ]; then
D="${1%/*}"
# cleanup after Solaris directory prune trick
if [ "${D##*/./}" != "${D}" ]; then
D="${D%%/./*}/${D##*/./}"
else
D="${D%/.}"
fi
fi
L="${F#lib}"
L="${L%.so}"
L="${L%.a}"
L="${L%.dylib}"
# FIXME: need more versioning tests
if testsym "${1}" "lua_getfenv"; then
V=501
elif testsym "${1}" "lua_yieldk"; then
if testsym "${1}" "lua_getctx"; then
V=502
else
V=503
fi
else
return 1
fi
[ "$V" -gt 0 -a "$V" -ge "${LIBLUA_VER:-0}" ] || return 1
[ "$V" -gt "${LIBLUA_VER:-0}" -o "${#D}" -lt "${#LIBLUA_DIR}" -o \( "${JIT_REQ}" = "yes" -a "${LIBJIT_VER:-0}" -lt "${JIT_MAX}" \) ] || return 1
[ "$V" -ge "${API_MIN}" -a "$V" -le "${API_MAX}" ] || return 1
if [ -n "${JIT_REQ}" ]; then
# FIXME: need more versioning tests
if testsym "${1}" "luaopen_jit"; then
J=20000
fi
if [ "${JIT_REQ}" = "skip" ]; then
[ "${J}" -eq 0 ] || return 1
elif [ "${JIT_REQ}" = "yes" ]; then
[ "$J" -ge "${LIBJIT_VER:-0}" ] || return 1
[ "$J" -gt "${LIBJIT_VER:-0}" -o "${#D}" -lt "${#LIBJIT_DIR}" ] || return 1
[ "$J" -ge ${JIT_MIN} ] || return 1
[ "$J" -le "${JIT_MAX}" ] || return 1
LIBJIT_VER="$J"
LIBJIT_DIR="$D"
LIBJIT_LIB="$L"
fi
fi
LIBLUA_VER="$V"
LIBLUA_DIR="$D"
LIBLUA_LIB="$L"
}
#
# foundlib
#
# true if found the best (maximum) possible version, false otherwise
#
foundlib() {
if [ "${LIBLUA_VER:-0}" -lt "${API_MAX}" ]; then
return 1
fi
if [ "${JIT_REQ}" = "yes" -a "${LIBJIT_VER:-0}" -lt "${JIT_MAX}" ]; then
return 1
fi
if [ "${SHORTEST}" = "yes" ]; then
return 1
fi
return 0
}
findlib() {
if [ -n "${PKGCONFIG}" ]; then
PKGFLAGS="$("${PKGCONFIG}" --list-all </dev/null 2>>/dev/null | sed -ne 's/^\(lua[^ ]*\).*/\1/p' | xargs -- ${PKGCONFIG} --libs 2>>/dev/null | cat)"
PKGDIRS="$(ldirs "${PKGFLAGS}")"
PKGDIRS="${PKGDIRS}${PKGDIRS:+:}/lib:/usr/lib:/usr/local/lib"
NUMDIRS="$(count "${PKGDIRS}")"
PKGLIBS="$(xdirs "l" "${PKGFLAGS}")"
NUMLIBS="$(count "${PKGLIBS}")"
ALLDIRS="${PKGDIRS}${PKGLIBS:+:}${PKGLIBS}"
IFS=:
set -- ${ALLDIRS}
unset IFS
I=1
while [ $I -le ${NUMDIRS} ]; do
K=$((1 + ${NUMDIRS}))
while [ $K -le $# ]; do
findlib_L=$(eval "printf \${$I}")
findlib_l=$(eval "printf \${$K}")
#printf -- "I=$I K=$K $findlib_L/lib$findlib_l*.*\n"
glob "${findlib_L}/lib${findlib_l}*.*" 0 trylib || :
if foundlib; then
return 0;
fi
glob "${findlib_L}/lib${findlib_l}*.*" ${MAXDEPTH} trylib || :
if foundlib; then
return 0;
fi
K=$(($K + 1))
done
I=$(($I + 1))
done
fi
ALLDIRS="${LDDIRS}${LDDIRS:+:}${LIBDIRS}"
IFS=:
set -- ${ALLDIRS}
unset IFS
for findlib_D; do
glob "${findlib_D}/liblua*.*" "${MAXDEPTH}" trylib || :
if foundlib; then
return 0
fi
done
# if we can find the lua interpreter, use it as a reference for
# library locations.
if findlua; then
findlib_D="${LUA_PATH%/*}"
findlib_D="${findlib_D%/*}/lib"
if [ -d "${findlib_D}" ]; then
glob "${findlib_D}/liblua*.*" "${MAXDEPTH}" trylib || :
if foundlib; then
return 0
fi
fi
fi
}
# check setuid and setgid mode
safeperm() {
[ -f "$1" -a ! -u "$1" -a ! -g "$1" ]
}
tryluac() {
tryluac_F="${1}"
[ -x "${tryluac_F}" ] && safeperm "${tryluac_F}" || return 0
tryluac_V="$("${tryluac_F}" -v </dev/null 2>&1 | head -n1 | sed -ne 's/^Lua \([0123456789][0123456789]*\.[0123456789][0123456789]*\).*/\1/p')"
: ${tryluac_V:=0}
tryluac_V="$((${tryluac_V%%.*} * 100 + ${tryluac_V##*.} % 100))"
[ "${tryluac_V}" -gt 0 -a "${tryluac_V}" -ge "${LUAC_VER:-0}" ] || return 0
[ "${tryluac_V}" -gt "${LUAC_VER:-0}" -o "${#tryluac_F}" -lt "${#LUAC_PATH}" ] || return 0
[ "${tryluac_V}" -ge "${API_MIN}" -a "${tryluac_V}" -le "${API_MAX}" ] || return 0
printf "return true" 2>>/dev/null | ${tryluac_F} -p - </dev/null >>/dev/null 2>&1 || return 0
LUAC_PATH="${tryluac_F}"
LUAC_VER="${tryluac_V}"
}
#
# foundluac
#
# true if found the best (maximum) possible version, false otherwise
#
foundluac() {
if [ "${LUAC_VER:-0}" -lt "${API_MAX}" ]; then
return 1
fi
if [ "${SHORTEST}" = "yes" ]; then
return 1
fi
return 0
}
findluac() {
if [ $# -eq 0 ]; then
IFS=:
set -- ${GLOB:-${GLOB_LUAC}}
unset IFS
fi
for findluac_G; do
IFS=:
for findluac_D in ${PATH}; do
unset IFS
glob "${findluac_D}/${findluac_G}" 0 tryluac || :
if foundluac; then
return 0
fi
done
IFS=:
for findluac_D in ${BINDIRS}; do
unset IFS
glob "${findluac_D}/${findluac_G}" "${MAXDEPTH}" tryluac || :
if foundluac; then
return 0
fi
done
unset IFS
done
[ "${LUAC_VER:-0}" -gt 0 ] && [ "${#LUAC_PATH}" -gt 0 ]
}
isinteger() {
I="${1}"
[ "${#I}" -gt 0 ] || return 1
while [ "${#I}" -gt 0 ]; do
if [ "${I##[0123456789]}" = "${I}" ]; then
return 1
fi
I=${I##[0123456789]}
done
return 0
}
checkints() {
while [ $# -gt 0 ]; do
if ! isinteger "${1}"; then
warn "%s: not a number" "${1}"
return 1
fi
shift
done
}
# Only major.minor for matching LUA_VERSION_NUM in lua.h. Also, _VERSION
# only includes major.minor.
lua2num() {
M=0
m="${2:-0}"
IFS=.
set -- ${1}
unset IFS
M=${1:-${M}}
m=${2:-${m}}
checkints $M $m
printf "$((${M} * 100 + ${m}))\n"
}
# All major.minor.patch for matching LUAJIT_VERSION_NUM in luajit.h.
jit2num() {
M=0
m="${2:-0}"
p="${3:-0}"
IFS=.
set -- ${1}
unset IFS
M=${1:-${M}}
m=${2:-${m}}
p=${3:-${p}}
checkints $M $m $p
printf "$((${M} * 10000 + ${m} * 100 + ${p}))\n"
}
mmp2num() {
M="${2:-0}"
m="${3:-0}"
p="${4:-0}"
IFS=".+-_"
set -- ${1}
unset IFS
if isinteger "${1:-}"; then
M=${1}
fi
if isinteger "${2:-}"; then
m=${2}
fi
if isinteger "${3:-}"; then
p=${3}
fi
checkints $M $m $p
printf "$((${M} * 10000 + ${m} * 100 + ${p}))\n"
}
trylua() {
trylua_F="${1}"
[ -x "${trylua_F}" ] && safeperm "${trylua_F}" || return 0
trylua_V="$("${trylua_F}" -e 'print(string.match(_VERSION, [[[%d.]+]]))' </dev/null 2>>/dev/null | head -n1 | sed -ne 's/^\([0123456789][0123456789]*\.[0123456789][0123456789]*\).*/\1/p')"
: ${trylua_V:=0}
trylua_V="$((${trylua_V%%.*} * 100 + ${trylua_V##*.} % 100))"
[ "${trylua_V}" -gt 0 -a "${trylua_V}" -ge "${LUA_VER:-0}" ] || return 0
[ "${trylua_V}" -gt "${LUA_VER:-0}" -o "${#trylua_F}" -lt "${#LUA_PATH}" ] || return 0
[ "${trylua_V}" -ge "${API_MIN}" -a "${trylua_V}" -le "${API_MAX}" ] || return 0
if [ -n "${JIT_REQ}" ]; then
J="$("${trylua_F}" -v </dev/null 2>&1 | head -n1 | sed -ne 's/^LuaJIT \([0123456789][0123456789]*\.[0123456789][0123456789]*\.[0123456789][0123456789]*\).*/\1/p')"
J="$(jit2num ${J:-0})"
if [ "${JIT_REQ}" = "skip" ]; then
[ "${J}" -eq 0 ] || return 0
elif [ "${JIT_REQ}" = "yes" ]; then
[ "${J}" -gt 0 ] || return 0
[ "${J}" -ge "${JIT_MIN}" ] || return 0
[ "${J}" -le "${JIT_MAX}" ] || return 0
fi
fi
LUA_PATH="${trylua_F}"
LUA_VER="${trylua_V}"
}
#
# foundlua
#
# true if found the best (maximum) possible version, false otherwise
#
foundlua() {
if [ "${LUA_VER:-0}" -lt "${API_MAX}" ]; then
return 1
fi
if [ "${SHORTEST}" = "yes" ]; then
return 1
fi
return 0
}
findlua() {
if [ $# -eq 0 ]; then
IFS=:
set -- ${GLOB:-${GLOB_LUA}}
unset IFS
fi
for findlua_G; do
IFS=:
for findlua_D in ${PATH}; do
unset IFS
glob "${findlua_D}/${findlua_G}" 0 trylua || :
if foundlua; then
return 0
fi
done
IFS=:
for findlua_D in ${BINDIRS}; do
unset IFS
glob "${findlua_D}/${findlua_G}" "${MAXDEPTH}" trylua || :
if foundlua; then
return 0
fi
done
unset IFS
done
[ "${LUA_VER:-0}" -gt 0 ] && [ "${#LUA_PATH}" -gt 0 ]
}
ccname() {
runcc -E - <<-EOF | awk '/sunpro/||/clang/||/gcc/||/other/{ print $1; exit; }'
#if defined __SUNPRO_C
sunpro
#elif defined __clang__
clang
#elif defined __GNUC__
gcc
#else
other
#endif
EOF
}
usage() {
cat <<-EOF
usage: ${0##*/} [-I:L:P:d:De:krm:xsv:j:JVh] cppflags|version|lua|luac|...
-I PATH additional search directory for includes
-L PATH additional search directory for libraries
-P PATH additional search directory for binaries
-d PATH use PATH as sandbox directory; a random 16 byte suffix is
generated from /dev/urandom and the directory removed on exit
unless a trailing "/" is present
(default sandbox is \$TMPDIR/${0##*/}-XXXXXXXXXXXXXXXX)
-D do not create a sandbox
-e GLOB glob pattern for finding utilities (lua, luac, etc)
-k query pkg-config if available
-r recursively search directories
-m MAXDEPTH limit recursion to MAXDEPTH
-s find shortest pathname, otherwise print first best match
-v VERSION require specific Lua version or range
(e.g. "5.1" or "5.1-5.2")
-j VERSION require specific LuaJIT version or range
(e.g. "2.0.1"; empty ranges like "-" force any LuaJIT version)
-J skip LuaJIT if encountered
-V print this script's version information
-h print this usage message
cppflags print derived additional CPPFLAGS necessary
version print derived Lua API version from cppflags discovery
ldflags print derived additional LDFLAGS necessary (TODO)
libs print derived additional LIBS necessary (TODO)
libversion print derived Lua API version from ldflags/libs discovery
luac print path to luac utility ($(printf "${GLOB_LUA}" | tr ':' ' '))
lua print path to lua interpreter ($(printf "${GLOB_LUAC}" | tr ':' ' '))
package.path print preferred module install path
package.cpath print preferred C module install path
ccname print CC name (e.g. sunpro, clang, gcc)
evalmacro run internal macro evaluator for debugging
testsym run internal library symbol reader for debugging
This utility is used to derive compiler flags and filesystem paths
necessary to utilize Lua, LuaJIT, and particular versions thereof.
On success it prints the requested information and exits with 0,
otherwise it fails with an exit status of 1.
Note that cppflags may not print anything if no additional flags are
required to compile against the requested API version.
When searching, the highest Lua version is preferred. Searching
stops once the highest version in the allowable range is found
unless the -s flag is specified.
LuaJIT is treated like any other Lua installation. If an explicit
LuaJIT version or range is specified, then only LuaJIT installations
will match. To exclude LuaJIT entirely use the -J switch.
This utility processes the environment variables CC, CPPFLAGS,
LDFLAGS, and PATH if present. If recursion is requested, then
directories specified in CPPFLAGS, LDFLAGS, and PATH are also
recursed.
If the environment variable CPPFLAGS is empty and no -I options are
specified directly, then /usr/include and /usr/local/include are
used when probing for cppflags and API version.
Report bugs to <william@25thandClement.com>
EOF
}
version() {
cat <<-EOF
luapath $MYVERSION
vendor $MYVENDOR
release $MYVERSION
EOF
}
while getopts I:L:P:d:De:krm:xsv:j:JVh OPT; do
case "${OPT}" in
I)
INCDIRS="${INCDIRS:-}${INCDIRS:+:}${OPTARG}"
;;
L)
LIBDIRS="${LIBDIRS:-}${LIBDIRS:+:}${OPTARG}"
;;
P)
BINDIRS="${BINDIRS:-}${BINDIRS:+:}${OPTARG}"
;;
d)
SANDBOX="${OPTARG}"
;;
D)
SANDBOX=
;;
e)
GLOB="${GLOB:-}${GLOB:+:}${OPTARG}"
;;
k)
PKGCONFIG="$(command -v pkg-config || true)"
;;
r)
RECURSE=yes
;;
m)
if [ "${#OPTARG}" -eq 0 -o -n "${OPTARG##[0123456789]}" ]; then
panic "%s: invalid maxdepth" "${OPTARG}"
fi
MAXDEPTH="${OPTARG}"
;;
x)
#
# NOTE: This option was
#
# -x do not cross device mounts when recursing
#
# but is currently unsupported as our built-in glob function
# does not implement this functionality. Previously this
# option caused -xdev to be added to invocations of find(1).
;;
s)
SHORTEST=yes
;;
v)
MIN=${OPTARG%%[,:-]*}
MAX=${OPTARG##*[,:-]}
API_MIN="$(lua2num ${MIN:-0} 0)"
API_MAX="$(lua2num ${MAX:-99} 99)"
if [ "${API_MIN}" -gt "${API_MAX}" ]; then
panic "%s: invalid version range" "${OPTARG}"
fi
;;
j)
MIN=${OPTARG%%[,:-]*}
MAX=${OPTARG##*[,:-]}
JIT_MIN="$(jit2num ${MIN:-0} 0 0)"
JIT_MAX="$(jit2num ${MAX:-99} 99 99)"
if [ "${JIT_MIN}" -gt "${JIT_MAX}" ]; then
panic "%s: invalid version range" "${OPTARG}"
fi
JIT_REQ=yes
;;
J)
JIT_REQ=skip
;;
V)
version
exit 0
;;
h)
usage
exit 0
;;
*)
usage >&2
exit 1
;;
esac
done
shift $(($OPTIND - 1))
[ "${RECURSE}" = "yes" ] || MAXDEPTH=0
for U in "${CC}" grep od rm rmdir sed xargs; do
! command -v "${U}" >>/dev/null 2>&1 || continue
# ${CC} might have trailing flags or invoke the compiler through env
! command -v "${U%% *}" >>/dev/null 2>&1 || continue
warn "%s: command not found" "${U}"
done
if [ -n "${SANDBOX}" ]; then
if [ "${SANDBOX}" = "${SANDBOX%/}" ]; then
if [ ! -c "${DEVRANDOM}" ]; then
# TODO: expand DEVRANDOM into set of different possibilities to check
panic "%s: no character random device available" "${DEVRANDOM}"
fi
TMP="${SANDBOX}$(od -An -N8 -tx1 < ${DEVRANDOM} 2>>/dev/null | tr -d ' ')"
if [ ${#TMP} -ne $((${#SANDBOX} + 16)) ]; then
panic "%s: unable to generate random suffix" "${SANDBOX}"
fi
SANDBOX="${TMP}"
trap "cd .. && rm -f -- ${SANDBOX}/* && rmdir -- ${SANDBOX}" EXIT
fi
if [ ! -d "${SANDBOX}" ]; then
OMASK="$(umask)"
umask 0777
mkdir -m0550 -- "${SANDBOX}" || exit 1
umask ${OMASK}
fi
cd ${SANDBOX}
fi
CPPDIRS="$(idirs "${CPPFLAGS:-}")"
if [ -z "${CPPDIRS}" -a -z "${INCDIRS}" ]; then
INCDIRS="/usr/include:/usr/local/include"
fi
LDDIRS="$(ldirs "${LDFLAGS:-}")"
if [ -z "${LDDIRS}" -a -z "${LIBDIRS}" ]; then
LIBDIRS="/lib:/usr/lib:/usr/local/lib"
fi
case "${1:-}" in
cppflags)
findversion || exit 1
[ "${API_VER:-0}" -gt 0 ] || exit 1
[ -z "${API_DIR:-}" ] || printf -- "-I${API_DIR}\n"
;;
version)
findversion || exit 1
printf "$(((${API_VER} / 100) % 100)).$((($API_VER) % 100))\n"
;;
ldflags)
findlib
[ "${LIBLUA_VER:-0}" -gt 0 ] || exit 1
if [ "${#LIBLUA_DIR}" -gt 0 ]; then
printf -- "-L%s\n" "${LIBLUA_DIR}"
fi
;;
libs)
findlib
[ "${LIBLUA_VER:-0}" -gt 0 ] || exit 1
printf -- "-l%s\n" "${LIBLUA_LIB}"
;;
libv*)
findlib
[ "${LIBLUA_VER:-0}" -gt 0 ] || exit 1
printf "$(((${LIBLUA_VER} / 100) % 100)).$((($LIBLUA_VER) % 100))\n"
;;
luac)
shift
if [ $# -gt 0 ]; then
append GLOB $*
fi
findluac || exit 1
printf -- "${LUAC_PATH}\n"
;;
lua)
shift
if [ $# -gt 0 ]; then
append GLOB $*
fi
findlua || exit 1
printf -- "${LUA_PATH}\n"
;;
ldir|cdir)
#
# ldir and cdir were deprecated on 2014-12-18. On 2016-03-25 they
# were revived because their names are more intuitive than
# package.path and package.cpath. For now try to support the
# semantics of both by assuming interpreter glob patterns only match
# file names, while preferred install directory string.match
# expressions have directory components.
#
if true; then
MODE="${1}"
# move command to end; rotates to ${1} after loop
set -- "$@" "${1}"
shift
cdir_I=0
cdir_N="$(($# - 1))"
while [ "${cdir_I}" -lt "${cdir_N}" ]; do
if [ "${1#*/}" = "${1}" ]; then
append GLOB "${1}"
warn "%s: passing glob patterns to %s is deprecated" "${1}" "${MODE}"
else
set -- "$@" "${1}"
fi
shift
cdir_I=$((${cdir_I} + 1))
done
fi
findlua || exit 1
findinstalldir "$@" || exit 1
;;
package.path|package.cpath)
findlua || exit 1
findinstalldir "$@" || exit 1
;;
ccname)
ccname
;;
evalmacro)
shift
evalmacro $*
;;
testsym)
shift
if testsym $*; then
printf "found\n"
exit 0
else
printf "not found\n"
exit 1
fi
;;
*)
if [ -n "${1:-}" ]; then
warn "%s: unknown command" "${1}"
else
warn "no command specified"
fi
exit 1
;;
esac
exit 0
|