# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

inherit multilib toolchain-funcs

GIT_V="2.25.1"

DESCRIPTION="a fast web-interface for git repositories"
HOMEPAGE="https://git.zx2c4.com/cgit/about"
SRC_URI="https://www.kernel.org/pub/software/scm/git/git-${GIT_V}.tar.xz
	https://git.zx2c4.com/cgit/snapshot/${P}.tar.xz"

LICENSE="GPL-2"
SLOT="0"
KEYWORDS="amd64 x86"
IUSE="doc highlight lua luajit lzip markdown static +vanilla zip zstd"

LUA_DEPEND="
	lua? (
		luajit? ( dev-lang/luajit )
		!luajit? ( dev-lang/lua:0 )
	)
"

BDEPEND="
	doc? ( app-text/docbook-xsl-stylesheets
		>=app-text/asciidoc-8.5.1 )
"

RDEPEND="${LUA_DEPEND}
	dev-vcs/git
	highlight? ( || ( dev-python/pygments app-text/highlight ) )
	lzip? ( app-arch/lzip )
	markdown? ( dev-python/markdown )
	zip? ( app-arch/zip )
	zstd? ( app-arch/zstd )
	!static? ( sys-libs/zlib )
"

DEPEND="${LUA_DEPEND}
	static? (
		sys-libs/zlib[static-libs(+)]
	)
"

# +static fails with +luajit
REQUIRED_USE="
	static? ( !luajit )
"

src_prepare() {
	if ! use vanilla; then
		PATCHES+=(
			"${FILESDIR}/${P}-git-http-backend.patch"
		)
	fi

	default

	rmdir git || die
	mv "${WORKDIR}"/git-"${GIT_V}" git || die

	echo "prefix = ${EPREFIX}/usr" >> cgit.conf
	echo "libdir = ${EPREFIX}/usr/$(get_libdir)" >> cgit.conf
	echo "CACHE_ROOT = ${CGIT_CACHEDIR}" >> cgit.conf
	echo "DESTDIR = ${D}" >> cgit.conf
	echo "CGIT_SCRIPT_PATH = ${EPREFIX}/usr/libexec/cgit" >> cgit.conf
	echo "CGIT_DATA_PATH = ${EPREFIX}/usr/share/cgit/resources" >> cgit.conf
	if use lua; then
		if use luajit; then
			echo "LUA_PKGCONFIG = luajit" >> cgit.conf
		else
			echo "LUA_PKGCONFIG = lua" >> cgit.conf
		fi
	else
		echo "NO_LUA = 1" >> cgit.conf
	fi
}

src_configure() {
	myopts=(
		$(usex elibc_musl NO_REGEX=NeedsStartEnd '')
	)

	export MY_MAKEOPTS="${myopts[@]}"
	LDFLAGS="${LDFLAGS} $(usex static -static '')"
}

src_compile() {
	emake ${MY_MAKEOPTS} V=1 AR="$(tc-getAR)" CC="$(tc-getCC)" CFLAGS="${CFLAGS}" LDFLAGS="${LDFLAGS}"
	use doc && emake V=1 doc-man
}

src_install() {
	emake ${MY_MAKEOPTS} V=1 AR="$(tc-getAR)" CC="$(tc-getCC)" CFLAGS="${CFLAGS}" LDFLAGS="${LDFLAGS}" install

	dodoc README
	use doc && doman cgitrc.5
}

pkg_postinst() {
	ewarn "For caching support in its default configuration, /var/cache/cgit"
	ewarn "needs to exist and be owned by the user executing cgit."
}