# Copyright 1999-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

EAPI=5

#multilib currently only used for get_libdir
inherit eutils multilib versionator

DESCRIPTION="Microsoft SQL Server ODBC Driver 1.0 for Linux"

HOMEPAGE="http://www.microsoft.com/en-us/download/details.aspx?id=28160"

SRC_URI="http://download.microsoft.com/download/6/A/B/6AB27E13-46AE-4CE9-AFFD-406367CADC1D/Linux6/${P}.tar.gz"
#md5:  36aca6fdfaa6e87754c477e08969fed4
#sha1: ba8a27b1fc91b933a31d987805a6f78e29f893b4

LICENSE="MSsqlncli-11"

RESTRICT="mirror"

SLOT="0"

KEYWORDS="~amd64"

IUSE="doc examples"

MERGE_TYPE=binary

HDEPEND="dev-util/patchelf" # does not work with portage-2.1.11.50
DEPEND=${HDEPEND}		    # workaround

# The somewhat strange looking dependencies are explained by:
# sys-apps/util-linux      <-libuuid.so
# sys-libs/e2fsprogs-libs  <-libcom_err.so

RDEPEND="virtual/libc
		 virtual/krb5
		 dev-libs/openssl
		 >dev-db/unixODBC-2.3.1[iconv-char-enc-utf8(+),iconv-ucode-enc-utf16le(+)]
		 sys-apps/util-linux
		 sys-libs/e2fsprogs-libs"

MY_PV=$(get_version_component_range 1-2)
MY_BV=$(get_version_component_range 3-4) # MS build number?

# libsqlncli must remain the first entry, it is later referenced
QA_PREBUILT=" opt/microsoft/sqlncli/$(get_libdir)/libsqlncli-${MY_PV}.so.${MY_BV}
	 		  opt/microsoft/sqlncli/bin/sqlcmd-${PV}
	 		  opt/microsoft/sqlncli/bin/bcp-${PV}
			 "
src_prepare() {
	epatch "${FILESDIR}/${P}"-use-destdir-tempdir.patch
	if use examples; then
		mkdir -p "${S}/docs/examples" || die
		cp -a "${FILESDIR}/examples" "${S}/docs" || die
	fi
}

src_install() {
	# Microsoft's install.sh assumes that these directories already exist
	dodir "/usr/bin"
	dodir "/usr/$(get_libdir)"

	# run the verify step
	TEMPDIR="${T}" DESTDIR="${ED}" ./install.sh verify

	# run the install step
	TEMPDIR="${T}" DESTDIR="${ED}" ./install.sh install --accept-license --force

	# Remove image path from the driver configuration file which is somehow
	# generated by install.sh. It is later used by odbcinst called from 
	# pkg_postinst()
	sed -i -e "s:${ED}:/:" "${ED}/opt/microsoft/sqlncli/${PV}/sqlncli.ini"||die

	# Overall strategy in order to avoid contamination of /usr/lib64: 
	# 1.) create symlinks for the needed libraries in 
	#     /opt/microsoft/sqlncli/lib64, pointing their surrogates
	#     available from /usr/lib64
	# 2.) set DT_NEEDED in the precompiled binaries so each library
	#     knows where to look for the needed libraries
	# 3.) create /usr/lib64/libsqlncli.so as a linker script so
	#     folks can simply link the driver directly by -lsqlncli
	# So ...

	# 1.) Create symlinks
	#     libs is an associative array of shared library names which 
	#     are needed by the pre-compiled Microsoft binaries ([key]) 
	#     and the names of the libraries the binaries should use 
	#     instead (value). This list was manually created using 
	#     scanelf --needed
	local -A libs=(
				    [libcrypto.so.10]=libcrypto.so
			           [libssl.so.10]=libssl.so
			           [libodbc.so.1]=libodbc.so
			       [libodbcinst.so.1]=libodbcinst.so
				  )

	#     now, for each needed library create a symlink in /opt/...
	for i in ${!libs[*]}; do  # e.g.: $i == libssl.so.10
		local replacement=${EPREFIX}/usr/$(get_libdir)/${libs[${i}]}
	    local needed=opt/microsoft/sqlncli/$(get_libdir)/${i}
		dosym "${replacement}" "${needed}"
	done

	# 2.) convert QA_PREBUILT into an array ...
	read -a binaries <<<${QA_PREBUILT}

	#   .. and set DT_NEEDED for each of the files named in $binaries
	for prebuild in ${binaries[@]}; do
		local runpath=${EPREFIX}/opt/microsoft/sqlncli/$(get_libdir)/
		patchelf --set-rpath "${runpath}" "${ED}/${prebuild}" || die
	done

	# 3.) enable folks to link the client library directly via -lsqlncli 
	#     w/o having to specify the full installation path (nice to have)
	local sqllib=${EPREFIX}/${binaries[0]}
	local usrlib=${ED}/usr/$(get_libdir)/libsqlncli.so
	echo "GROUP ( ${sqllib} )"  > "${usrlib}" || die

	# better install package specific headers into /usr/include/sqlncli/
	insinto /usr/include/sqlncli
	doins include/*

	# install MS produced documentation into /usr instead of /opt 
	insinto usr/share/docs/{PF}
	if use doc; then
		dodoc  "${ED}/opt/microsoft/sqlncli/${PV}/"{README,WARNING}
		dohtml -r "${ED}/opt/microsoft/sqlncli/${PV}/docs/en_US/"*
	fi

	# ... and finally also the example there
	if use examples; then
		docompress -x usr/share/doc/${PF}/examples
		dodoc -r "${S}"/docs/examples  || die
	fi

	# Prevent inadequate scripts or copies of files already installed in 
	# /usr/include or /usr/share/doc/sqlncli to get installed in 
	# /opt/microsoft/sqlncli/ too.
	# All this stuff can't simply be removed already in src_prepare() because
	# that implies a complete rewrite of Microsoft's install.sh.
	local noins={include,docs,install.sh,build_dm.sh,LICENSE,README,WARNING}
	rm -r "${ED}/opt/microsoft/sqlncli/${PV}/"${noins} || die
}

pkg_postinst() {
	odbcinst -i -d -f "${EPREFIX}/opt/microsoft/sqlncli/${PV}/sqlncli.ini" || die

	read -a binaries <<<"${QA_PREBUILT}"
	cat<<EOF

	If ldconfig should complain about '$(basename ${binaries[0]})' being
	'truncated', then you may have hit a bug in ldconfig. See:
	http://old.nabble.com/ldconfig-problem-with-patchelf\
-and-64-bit-libs-to28466603.html
EOF
}

pkg_prerm() {
	odbcinst -u -d -n "SQL Server Native Client 11.0" || die
}