dev-util/cargo is not needed more... (due #302)

1 files changed, 138 insertions, 0 deletions

diff --git a/eclass/cargo.eclass b/eclass/cargo.eclass
new file mode 100644
index 0000000..96694cd
--- /dev/null
+++ b/eclass/cargo.eclass
@@ -0,0 +1,138 @@
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+# @ECLASS: cargo.eclass
+# @MAINTAINER:
+# rust@gentoo.org
+# @AUTHOR:
+# Doug Goldstein <cardoe@gentoo.org>
+# @BLURB: common functions and variables for cargo builds
+
+if [[ -z ${_CARGO_ECLASS} ]]; then
+_CARGO_ECLASS=1
+
+case ${EAPI} in
+	6) : ;;
+	*) die "EAPI=${EAPI:-0} is not supported" ;;
+esac
+
+EXPORT_FUNCTIONS src_unpack src_compile src_install
+
+IUSE="${IUSE} debug"
+
+[[ ${CATEGORY}/${PN} != dev-util/cargo ]] && DEPEND="${DEPEND} || ( >=dev-util/cargo-0.13.0
+								>=virtual/rust-1.22.1 )"
+
+ECARGO_HOME="${WORKDIR}/cargo_home"
+ECARGO_VENDOR="${ECARGO_HOME}/gentoo"
+
+# @FUNCTION: cargo_crate_uris
+# @DESCRIPTION:
+# Generates the URIs to put in SRC_URI to help fetch dependencies.
+cargo_crate_uris() {
+	local crate
+	for crate in "$@"; do
+		local name version url pretag
+		name="${crate%-*}"
+		version="${crate##*-}"
+		pretag="[a-zA-Z]+"
+		if [[ $version =~ $pretag ]]; then
+			version="${name##*-}-${version}"
+			name="${name%-*}"
+		fi
+		url="https://crates.io/api/v1/crates/${name}/${version}/download -> ${crate}.crate"
+		echo "${url}"
+	done
+}
+
+# @FUNCTION: cargo_src_unpack
+# @DESCRIPTION:
+# Unpacks the package and the cargo registry
+cargo_src_unpack() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	mkdir -p "${ECARGO_VENDOR}" || die
+	mkdir -p "${S}" || die
+
+	local archive shasum pkg
+	for archive in ${A}; do
+		case "${archive}" in
+			*.crate)
+				ebegin "Loading ${archive} into Cargo registry"
+				tar -xf "${DISTDIR}"/${archive} -C "${ECARGO_VENDOR}/" || die
+				# generate sha256sum of the crate itself as cargo needs this
+				shasum=$(sha256sum "${DISTDIR}"/${archive} | cut -d ' ' -f 1)
+				pkg=$(basename ${archive} .crate)
+				cat <<- EOF > ${ECARGO_VENDOR}/${pkg}/.cargo-checksum.json
+				{
+					"package": "${shasum}",
+					"files": {}
+				}
+				EOF
+				# if this is our target package we need it in ${WORKDIR} too
+				# to make ${S} (and handle any revisions too)
+				if [[ ${P} == ${pkg}* ]]; then
+					tar -xf "${DISTDIR}"/${archive} -C "${WORKDIR}" || die
+				fi
+				eend $?
+				;;
+			cargo-snapshot*)
+				ebegin "Unpacking ${archive}"
+				mkdir -p "${S}"/target/snapshot
+				tar -xzf "${DISTDIR}"/${archive} -C "${S}"/target/snapshot --strip-components 2 || die
+				# cargo's makefile needs this otherwise it will try to
+				# download it
+				touch "${S}"/target/snapshot/bin/cargo || die
+				eend $?
+				;;
+			*)
+				unpack ${archive}
+				;;
+		esac
+	done
+
+	cargo_gen_config
+}
+
+# @FUNCTION: cargo_gen_config
+# @DESCRIPTION:
+# Generate the $CARGO_HOME/config necessary to use our local registry
+cargo_gen_config() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	cat <<- EOF > "${ECARGO_HOME}/config"
+	[source.gentoo]
+	directory = "${ECARGO_VENDOR}"
+
+	[source.crates-io]
+	replace-with = "gentoo"
+	local-registry = "/nonexistant"
+	EOF
+}
+
+# @FUNCTION: cargo_src_compile
+# @DESCRIPTION:
+# Build the package using cargo build
+cargo_src_compile() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	export CARGO_HOME="${ECARGO_HOME}"
+
+	cargo build -v $(usex debug "" --release) \
+		|| die "cargo build failed"
+}
+
+# @FUNCTION: cargo_src_install
+# @DESCRIPTION:
+# Installs the binaries generated by cargo
+cargo_src_install() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	cargo install --root="${D}/usr" $(usex debug --debug "") \
+		|| die "cargo install failed"
+	rm -f "${D}/usr/.crates.toml"
+
+	[ -d "${S}/man" ] && doman "${S}/man" || return 0
+}
+
+fi