# Copyright 1999-2022 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=8

VERIFY_SIG_OPENPGP_KEY_PATH="${BROOT}"/usr/share/openpgp-keys/joelrosdahl.asc
inherit cmake toolchain-funcs flag-o-matic verify-sig

DESCRIPTION="Fast compiler cache"
HOMEPAGE="https://ccache.dev/"
SRC_URI="https://github.com/ccache/ccache/releases/download/v${PV}/${P}.tar.xz"
SRC_URI+=" verify-sig? ( https://github.com/ccache/ccache/releases/download/v${PV}/${P}.tar.xz.asc )"

LICENSE="GPL-3 LGPL-3"
SLOT="0"
KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 ~loong ~m68k ~mips ppc ppc64 ~riscv ~s390 sparc x86"
# Enable 'static-c++' by default to make 'gcc' ebuild Just Work: bug #761220
IUSE="doc redis +static-c++ test"
RESTRICT="!test? ( test )"

DEPEND="app-arch/zstd:=
	redis? ( dev-libs/hiredis:= )"
RDEPEND="${DEPEND}
	dev-util/shadowman
	sys-apps/gentoo-functions"
# Needed for eselect calls in pkg_*
IDEPEND="dev-util/shadowman"

# clang-specific tests use dev-libs/elfutils to compare objects for equality.
# Let's pull in the dependency unconditionally.
DEPEND+=" test? ( dev-libs/elfutils )"
BDEPEND=" doc? ( dev-ruby/asciidoctor )
	verify-sig? ( sec-keys/openpgp-keys-joelrosdahl )"

DOCS=( doc/{AUTHORS,MANUAL,NEWS}.adoc CONTRIBUTING.md README.md )

PATCHES=(
	"${FILESDIR}"/${PN}-3.5-nvcc-test.patch
	"${FILESDIR}"/${PN}-4.0-objdump.patch
)

src_prepare() {
	cmake_src_prepare

	sed \
		-e "/^EPREFIX=/s:'':'${EPREFIX}':" \
		"${FILESDIR}"/ccache-config-3 > ccache-config || die
}

src_configure() {
	# Mainly used in tests
	tc-export CC OBJDUMP

	# Avoid dependency on libstdc++.so. Useful for cases when
	# we would like to use ccache to build older gcc which injects
	# into ccache locally built (possibly outdated) libstdc++
	# See bug #761220 for examples.
	#
	# Ideally gcc should not use LD_PRELOAD to avoid this type of failure.
	use static-c++ && append-ldflags -static-libstdc++

	local mycmakeargs=(
		-DENABLE_DOCUMENTATION=$(usex doc)
		-DENABLE_TESTING=$(usex test)
		-DZSTD_FROM_INTERNET=OFF
		-DHIREDIS_FROM_INTERNET=OFF
		-DREDIS_STORAGE_BACKEND=$(usex redis)
	)

	cmake_src_configure
}

src_install() {
	cmake_src_install

	dobin ccache-config
	insinto /usr/share/shadowman/tools
	newins - ccache <<<"${EPREFIX}/usr/lib/ccache/bin"
}

pkg_prerm() {
	if [[ -z ${REPLACED_BY_VERSION} && -z ${ROOT} ]] ; then
		eselect compiler-shadow remove ccache
	fi
}

pkg_postinst() {
	if [[ -z ${ROOT} ]] ; then
		eselect compiler-shadow update ccache
	fi
}