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# Copyright 1999-2015 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# @ECLASS: golang-vcs-snapshot.eclass
# @MAINTAINER:
# William Hubbs <williamh@gentoo.org>
# @BLURB: support eclass for unpacking VCS snapshot tarballs for
# software written in the Go programming language
# @DESCRIPTION:
# This eclass provides a convenience src_unpack() which unpacks the
# first tarball mentioned in SRC_URI to its appropriate location in
# ${WORKDIR}/${P}, treating ${WORKDIR}/${P} as a go workspace.
# Also, it provides a downstream method of vendoring packages.
#
# The location where the tarball is extracted is defined as
# ${WORKDIR}/${P}/src/${EGO_PN}. The location of vendored packages is
# defined as ${WORKDIR}/${P}/src/${EGO_PN%/*}/vendor to match Go's
# vendoring setup.
#
# The typical use case is VCS snapshots coming from github, bitbucket
# and similar services.
#
# Please note that this eclass currently handles only tarballs
# (.tar.gz), but support for more formats may be added in the future.
#
# @EXAMPLE:
#
# @CODE
# EGO_PN=github.com/user/package
# EGO_VENDOR=(
# "github.com/xenolf/lego 6cac0ea7d8b28c889f709ec7fa92e92b82f490dd"
# "golang.org/x/crypto 453249f01cfeb54c3d549ddb75ff152ca243f9d8 github.com/golang/crypto"
# )
#
# inherit golang-vcs-snapshot
#
# SRC_URI="http://github.com/example/${PN}/tarball/v${PV} -> ${P}.tar.gz
# ${EGO_VENDOR_URI}"
# @CODE
#
# The above example will extract the tarball to
# ${WORKDIR}/${P}/src/github.com/user/package
# and add the vendored tarballs to ${WORKDIR}/src/${EGO_PN}/vendor
inherit golang-base
case ${EAPI:-0} in
5|6) ;;
*) die "${ECLASS} API in EAPI ${EAPI} not yet established."
esac
EXPORT_FUNCTIONS src_unpack
# @ECLASS-VARIABLE: EGO_VENDOR
# @DESCRIPTION:
# This variable contains a list of vendored packages.
# The items of this array are strings that contain the
# import path and the git commit hash for a vendored package.
# If the import path does not start with github.com, the third argument
# can be used to point to a github repository.
declare -arg EGO_VENDOR
_golang-vcs-snapshot_set_vendor_uri() {
EGO_VENDOR_URI=
local lib
for lib in "${EGO_VENDOR[@]}"; do
lib=(${lib})
if [[ -n ${lib[2]} ]]; then
EGO_VENDOR_URI+=" https://${lib[2]}/archive/${lib[1]}.tar.gz -> ${lib[2]//\//-}-${lib[1]}.tar.gz"
else
EGO_VENDOR_URI+=" https://${lib[0]}/archive/${lib[1]}.tar.gz -> ${lib[0]//\//-}-${lib[1]}.tar.gz"
fi
done
readonly EGO_VENDOR_URI
}
_golang-vcs-snapshot_set_vendor_uri
unset -f _golang-vcs-snapshot_set_vendor_uri
_golang-vcs-snapshot_dovendor() {
local VENDOR_PATH=$1 VENDORPN=$2 TARBALL=$3
rm -fr "${VENDOR_PATH}/${VENDORPN}" || die
mkdir -p "${VENDOR_PATH}/${VENDORPN}" || die
tar -C "${VENDOR_PATH}/${VENDORPN}" -x --strip-components 1\
-f "${DISTDIR}"/${TARBALL} || die
}
# @FUNCTION: golang-vcs-snapshot_src_unpack
# @DESCRIPTION:
# Extract the first archive from ${A} to the appropriate location for GOPATH.
golang-vcs-snapshot_src_unpack() {
local lib vendor_path x
ego_pn_check
set -- ${A}
x="$1"
mkdir -p "${WORKDIR}/${P}/src/${EGO_PN%/...}" || die
tar -C "${WORKDIR}/${P}/src/${EGO_PN%/...}" -x --strip-components 1 \
-f "${DISTDIR}/${x}" || die
if [[ -n "${EGO_VENDOR}" ]]; then
vendor_path="${WORKDIR}/${P}/src/${EGO_PN%/...}/vendor"
mkdir -p "${vendor_path}" || die
for lib in "${EGO_VENDOR[@]}"; do
lib=(${lib})
if [[ -n ${lib[2]} ]]; then
einfo "Vendoring ${lib[0]} ${lib[2]//\//-}-${lib[1]}.tar.gz"
_golang-vcs-snapshot_dovendor "${vendor_path}" ${lib[0]} \
${lib[2]//\//-}-${lib[1]}.tar.gz
else
einfo "Vendoring ${lib[0]} ${lib[0]//\//-}-${lib[1]}.tar.gz"
_golang-vcs-snapshot_dovendor "${vendor_path}" ${lib[0]} \
${lib[0]//\//-}-${lib[1]}.tar.gz
fi
done
fi
}
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