#!/usr/bin/env build

build_query_usage()
{
cat<<END_OF_HELP
usage: build-query [options] <arg>

options:
  --topdir		Builder topdir
  --toolchain		Display the toolchain environ
  --help		Display this help

package options:
  --bdepends		Package build dependancies [\$BDEPENDS]
  --bdeps-all		Build dependancies of all packages depended on
  --category		Package category [\$CATEGORY]
  --description		Package Description [\$DESCRIPTION]
  --destdir		Build-time destination directory [\$D]
  --exists		Exit with a non-zero exit-status if pkg does not exist
  --envdir		Package environment directory [unused]
  --environ		Print the package environ
  --filesdir		Package files/ directory [\$F]
  --logdir		Package log directory [\$L]
  --license		Package license [\$LICENSE]
  --name		Package name [\$NAME]
  --pkgname		Full package name [\$CATEGORY/\$NAME]
  --patches		Patches used by a package [\$PATCHES]
  --pkgdir		Path to package metadata
  --rulesfile		Path to package Buildrules file [\$RULESFILE]
  --release		Package release number [\$RELEASE]
  --rdepends		Package runtime dependancies [\$RDEPENDS]
  --rdeps-all		Runtime dependancies of all packages depended on
  --srcdir		Package source directory [\$S]
  --summary		Display package summary in specfile format
  --tmpdir		Package temporary directory [\$T]
  --src-uri		URI to package source(s) [\$SOURCE_URI]
  --version		Package version [\$VERSION]
  --var			Query specific variable from package
  --workdir		Package work directory [\$W]

END_OF_HELP
}

RECURSE_RDEPENDS='false'
recurse_bdeps()
{
	test "$#" -eq '0' && return
	if ${RECURSE_RDEPENDS}; then
		set -- "${@}" $(build query -R "${1}")
	else
		set -- "${@}" $(build query -B "${1}")
	fi

	eval query_recursive_var="$(echo "${1}"|sed -e 's,[_-/],_,g')"
	eval query_recursive_val="\$${query_recursive_var}"
	if ! test -z "${query_recursive_val}"; then
		unset query_recursive_val
		unset query_recursive_var
		return
	fi
	unset query_recursive_val

	echo "${1}"
	eval "${query_recursive_var}='${*}'"
	unset query_recursive_var

	shift
	for query_recursive_pkg; do
		recurse_bdeps "${query_recursive_pkg}"
	done
	unset
	unset query_recursive_pkg
}
recurse_rdeps()
{
	test "$#" -eq '0' && return
	RECURSE_RDEPENDS='true'
	recurse_bdeps "${@}"
}

# Look for cries for --help in the cmdline
for arg; do
	case "${arg}" in
	(-h|-help|--help) build_query_usage; exit 0;;
	esac
done

QUERY_ACTION="summary"

while [ "$#" -gt "0" ]; do
	case "${1}" in
	(-B|-bdepends|--bdepends)
		QUERY_ACTION="bdepends";;
	(-bdeps-all|--bdeps-all)
		QUERY_ACTION="bdeps_all";;
	(-c|-category|--category)
		QUERY_ACTION="category";;
	(-d|-description|--description)
		QUERY_ACTION="descr";;
	(-D|-destdir|--destdir)
		QUERY_ACTION="destdir";;
	(--exists)
		test -e "${BUILDER_PKGDIR}/${2}/Buildrules" && exit 0 || exit 1;;
	(-e|-envdir|--envdir)
		QUERY_ACTION="envdir";;
	(-E|-environ|--environ)
		QUERY_ACTION="environ";;
	(-f|-filesdir|--filesdir)
		QUERY_ACTION="filesdir";;
	(-l|-logdir|--logdir)
		QUERY_ACTION="logdir";;
	(-L|-license|--license)
		QUERY_ACTION="license";;
	(-n|-name|--name)
		QUERY_ACTION="name";;
	(-N|-pkgname|--pkgname)
		QUERY_ACTION="pkgname";;
	(-p|-patches|--patches)
		QUERY_ACTION="patches";;
	(-P|-pkgdir|--pkgdir)
		QUERY_ACTION="pkgdir";;
	(-r|-rulefile|--rulesfile)
		QUERY_ACTION="rulesfile";;
	(--release)
		QUERY_ACTION="release";;
	(-R|-rdepends|--rdepends)
		QUERY_ACTION="rdepends";;
	(-rdeps-all|--rdeps-all)
		QUERY_ACTION="rdeps_all";;
	(-s|-srcdir|--srcdir)
		QUERY_ACTION="srcdir";;
	(-S|-summary|--summary)
		QUERY_ACTION="summary";;
	(-toolchain|--toolchain)
		QUERY_ACTION="toolchain";;
	(-t|-topdir|--topdir)
		QUERY_ACTION="topdir";;
	(-T|-tmpdir|--tmpdir)
		QUERY_ACTION="tmpdir";;
	(-u|-source-uri|--src-uri)
		QUERY_ACTION="src_uri";;
	(-v|-version|--version)
		QUERY_ACTION="version";;
	(-V|-var|--var)
		shift
		if [ "$#" -lt "1" ]; then
			error "no variable specified"
			echo "try '${##*//} --help'" >&2
			exit 1
		fi

		QUERY_ACTION="var"
		QUERY_VAR="${1}"
		;;
	(-w|-workdir|--workdir)
		QUERY_ACTION="workdir";;
	(-*)	error "unknown query '${1}'"
		echo "try '${0##*/} --help'" >&2
		exit 1
		;;
	(*)	break;;
	esac
	shift
done

# FIXME move these to 'build-config'. 'build-query' is for package data
case "${QUERY_ACTION}" in
(topdir)
	echo "${BUILDER_TOPDIR}"
	exit 0;;

(toolchain)

	if [ "$#" -gt "0" ] && [ "${1}" != "${CHOST}" ]; then
		CROSS_COMPILE="${1}-"
		shift
	else
		CROSS_COMPILE="${CHOST}-"
	fi

	CC="${CROSS_COMPILE}gcc"
	CXX="${CROSS_COMPILE}g++"

	cat<<-EOF
	CC="${CC}"
	CXX="${CXX}"
	CROSS_COMPILE="${CROSS_COMPILE}"
	EOF
	export CC CXX CROSS_COMPILE

	# Note: we do not set AS since we often use gcc as the assembler

	for cmd in ar ld strip ranlib autom4te autoconf autoheader automake \
		aclocal autopoint libtool libtoolize; do
		var="$(echo "${cmd}"|tr '[a-z]' '[A-Z]')"
		if command -v "${CROSS_COMPILE}${cmd}" > /dev/null 2>&1; then
			echo  "${var}=${CROSS_COMPILE}${cmd}"
		else
			echo "${var}=${cmd}"
		fi
		echo "export ${var}"
	done

	exit 0;;
esac

if test "$#" -eq "0"; then
	die "no package specified"
fi

load_rules "${1}"

# Allow the developer to hijack the SRC_URI with a checked out repository
# FIXME this causes problems for various dep targets
if [ -d "${BUILDER_PKGDIR}/${CATEGORY}/${NAME}/source" ]; then
	SOURCE_URI="file://${BUILDER_PKGDIR}/${CATEGORY}/${NAME}/source"
fi

case "${QUERY_ACTION}" in
(name)		echo "${NAME}";exit 0;;
(category)	echo "${CATEGORY}";exit 0;;
(pkgname)	echo "${CATEGORY}/${NAME}";exit 0;;
(pkgdir)	echo "${BUILDER_PKGDIR}/${CATEGORY}/${NAME}";exit 0;;
(rulesfile)	echo "${RULESFILE}";exit 0;;
(filesdir)	echo "${F}";exit 0;;
(workdir)	echo "${W}";exit 0;;
(logdir)	echo "${L}";exit 0;;
(envdir)	echo "${E}";exit 0;;
(tmpdir)	echo "${T}";exit 0;;
(destdir)	echo "${D}";exit 0;;


(srcdir)	echo "${S}";;
(src_uri)	echo "${SOURCE_URI}";;
(bdepends)	echo "$(echo ${BDEPENDS})";;
(bdeps_all)	recurse_bdeps ${BDEPENDS};;
(rdepends)	echo "$(echo ${RDEPENDS})";;
(rdeps_all)	recurse_rdeps ${RDEPENDS};;
(descr)		echo "${DESCRIPTION}";;
(version)	echo "${VERSION}";;
(release)	echo "${RELEASE}";;
(patches)	echo "${PATCHES}";;
(license)	echo "${LICENSE}";;

# Allow the caller to specify the variable to report.
# FIXME may need to protect our existing environ from being poked.
(var)		if [ -z "${QUERY_VAR}" ]; then
			die "no variable specified"
		fi
		eval "echo \"\$${QUERY_VAR}\"";;

# All the fun environ data necessary for grabbing a single package.  We ALWAYS
# report all the variables, even if unset.  This allows a caller to use this
# command to set their own environ and automagically clear any variables which
# are already set in their environment.
(environ)
		cat<<-EOF
		TARGET="${TARGET}"
		TOPDIR="${BUILDER_TOPDIR}"
		SYSROOT="${SYSROOT}"
		CBUILD="${CBUILD}"
		CHOST="${CHOST}"
		ARCH="${ARCH}"
		NAME="${NAME}"
		CATEGORY="${CATEGORY}"
		RULESFILE="${RULESFILE}"
		VERSION="${VERSION}"
		RELEASE="${RELEASE}"
		DESCRIPTION="${DESCRIPTION}"
		LICENSE="${LICENSE}"
		SOURCE_URI="${SOURCE_URI}"
		EOF

		if [ ! -z "${NOCLEAN}" ]; then
			echo "NOCLEAN=\"${NOCLEAN}\""
		else
			echo "NOCLEAN="
		fi
		if [ ! -z "${PATCHES}" ]; then
			echo "PATCHES=\"${PATCHES}\""
		else
			echo "PATCHES="
		fi
		if [ ! -z "${RDEPENDS}" ]; then
			echo "RDEPENDS=\"${RDEPENDS}\""
		else
			echo "RDEPENDS="
		fi
		if [ ! -z "${BDEPENDS}" ]; then
			echo "BDEPENDS=\"${BDEPENDS}\""
		else
			echo "BDEPENDS="
		fi
		cat<<-EOF
		F="${F}"
		W="${W}"
		L="${L}"
		E="${E}"
		T="${T}"
		D="${D}"
		S="${S}"
		EOF
		;;

# Basic summary command
(summary)
		echo "Name:		${CATEGORY}/${NAME}"
		echo "Version:	${VERSION}"
		echo "Release:	${RELEASE}"
		echo "License:	${LICENSE}"
		echo "Source:		${SOURCE_URI}"
		if [ ! -z "${RDEPENDS}" ]; then
			echo "Depends:		${RDEPENDS}"
		fi
		if [ ! -z "${BDEPENDS}" ]; then
			echo "BuildDeps:	${BDEPENDS}"
		fi

		cat <<-EOF

		${DESCRIPTION}
		EOF
		;;

(*)		die "unhandled query action '${QUERY_ACTION}'";;
esac

# vim: filetype=sh