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cargo.eclass
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cargo.eclass
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# Copyright 1999-2022 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
# @ECLASS: cargo.eclass
# @MAINTAINER:
# @AUTHOR:
# Doug Goldstein <[email protected]>
# Georgy Yakovlev <[email protected]>
# @SUPPORTED_EAPIS: 7 8
# @BLURB: common functions and variables for cargo builds
if [[ -z ${_CARGO_ECLASS} ]]; then
_CARGO_ECLASS=1
# check and document RUST_DEPEND and options we need below in case conditions.
# https://github.com/rust-lang/cargo/blob/master/CHANGELOG.md
RUST_DEPEND="virtual/rust"
case "${EAPI:-0}" in
0|1|2|3|4|5|6)
die "Unsupported EAPI=${EAPI:-0} (too old) for ${ECLASS}"
;;
7)
# 1.37 added 'cargo vendor' subcommand and net.offline config knob
RUST_DEPEND=">=virtual/rust-1.37.0"
;;
8)
# 1.39 added --workspace
# 1.46 added --target dir
# 1.48 added term.progress config option
# 1.51 added split-debuginfo profile option
# 1.52 may need setting RUSTC_BOOTSTRAP envvar for some crates
# 1.53 added cargo update --offline, can be used to update vulnerable crates from pre-fetched registry without editing toml
RUST_DEPEND=">=virtual/rust-1.53"
if [[ -z ${CRATES} && "${PV}" != *9999* ]]; then
eerror "undefined CRATES variable in non-live EAPI=8 ebuild"
die "CRATES variable not defined"
fi
;;
*)
die "Unsupported EAPI=${EAPI} (unknown) for ${ECLASS}"
;;
esac
inherit multiprocessing toolchain-funcs
if [[ ! ${CARGO_OPTIONAL} ]]; then
BDEPEND="${RUST_DEPEND}"
EXPORT_FUNCTIONS src_unpack src_configure src_compile src_install src_test
fi
IUSE="${IUSE} debug"
ECARGO_HOME="${WORKDIR}/cargo_home"
ECARGO_VENDOR="${ECARGO_HOME}/gentoo"
# @ECLASS_VARIABLE: CRATES
# @DEFAULT_UNSET
# @PRE_INHERIT
# @DESCRIPTION:
# bash string containing all crates package wants to download
# used by cargo_crate_uris()
# Example:
# @CODE
# CRATES="
# metal-1.2.3
# bar-4.5.6
# iron_oxide-0.0.1
# "
# inherit cargo
# ...
# SRC_URI="$(cargo_crate_uris)"
# @CODE
# @ECLASS_VARIABLE: CARGO_OPTIONAL
# @DEFAULT_UNSET
# @PRE_INHERIT
# @DESCRIPTION:
# If set to a non-null value, before inherit cargo part of the ebuild will
# be considered optional. No dependencies will be added and no phase
# functions will be exported.
#
# If you enable CARGO_OPTIONAL, you have to set BDEPEND on virtual/rust
# for your package and call at least cargo_gen_config manually before using
# other src_ functions of this eclass.
# note that cargo_gen_config is automatically called by cargo_src_unpack.
# @ECLASS_VARIABLE: myfeatures
# @DEFAULT_UNSET
# @DESCRIPTION:
# Optional cargo features defined as bash array.
# Should be defined before calling cargo_src_configure().
#
# Example package that has x11 and wayland as features, and disables default.
# @CODE
# src_configure() {
# local myfeatures=(
# $(usex X x11 '')
# $(usev wayland)
# )
# cargo_src_configure --no-default-features
# }
# @CODE
# @ECLASS_VARIABLE: ECARGO_REGISTRY_DIR
# @USER_VARIABLE
# @DEFAULT_UNSET
# @DESCRIPTION:
# Storage directory for cargo registry.
# Used by cargo_live_src_unpack to cache downloads.
# This is intended to be set by users.
# Ebuilds must not set it.
#
# Defaults to "${DISTDIR}/cargo-registry" it not set.
# @ECLASS_VARIABLE: ECARGO_OFFLINE
# @USER_VARIABLE
# @DEFAULT_UNSET
# @DESCRIPTION:
# If non-empty, this variable prevents online operations in
# cargo_live_src_unpack.
# Inherits value of EVCS_OFFLINE if not set explicitly.
# @ECLASS_VARIABLE: EVCS_UMASK
# @USER_VARIABLE
# @DEFAULT_UNSET
# @DESCRIPTION:
# Set this variable to a custom umask. This is intended to be set by
# users. By setting this to something like 002, it can make life easier
# for people who use cargo in a home directory, but are in the portage
# group, and then switch over to building with FEATURES=userpriv.
# Or vice-versa.
# @FUNCTION: cargo_crate_uris
# @DESCRIPTION:
# Generates the URIs to put in SRC_URI to help fetch dependencies.
# Uses first argument as crate list.
# If no argument provided, uses CRATES variable.
cargo_crate_uris() {
local -r regex='^([a-zA-Z0-9_\-]+)-([0-9]+\.[0-9]+\.[0-9]+.*)$'
local crate crates
if [[ -n ${@} ]]; then
crates="$@"
elif [[ -n ${CRATES} ]]; then
crates="${CRATES}"
else
eerror "CRATES variable is not defined and nothing passed as argument"
die "Can't generate SRC_URI from empty input"
fi
for crate in ${crates}; do
local name version url
[[ $crate =~ $regex ]] || die "Could not parse name and version from crate: $crate"
name="${BASH_REMATCH[1]}"
version="${BASH_REMATCH[2]}"
url="https://crates.io/api/v1/crates/${name}/${version}/download -> ${crate}.crate"
echo "${url}"
done
}
# @FUNCTION: cargo_gen_config
# @DESCRIPTION:
# Generate the $CARGO_HOME/config necessary to use our local registry and settings.
# Cargo can also be configured through environment variables in addition to the TOML syntax below.
# For each configuration key below of the form foo.bar the environment variable CARGO_FOO_BAR
# can also be used to define the value.
# Environment variables will take precedence over TOML configuration,
# and currently only integer, boolean, and string keys are supported.
# For example the build.jobs key can also be defined by CARGO_BUILD_JOBS.
# Or setting CARGO_TERM_VERBOSE=false in make.conf will make build quieter.
cargo_gen_config() {
debug-print-function ${FUNCNAME} "$@"
mkdir -p "${ECARGO_HOME}" || die
cat > "${ECARGO_HOME}/config" <<- _EOF_ || die "Failed to create cargo config"
[source.gentoo]
directory = "${ECARGO_VENDOR}"
[source.crates-io]
replace-with = "gentoo"
local-registry = "/nonexistant"
[net]
offline = true
[build]
jobs = $(makeopts_jobs)
incremental = false
[term]
verbose = true
$([[ "${NOCOLOR}" = true || "${NOCOLOR}" = yes ]] && echo "color = 'never'")
_EOF_
export CARGO_HOME="${ECARGO_HOME}"
_CARGO_GEN_CONFIG_HAS_RUN=1
}
# @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 $?
;;
*)
unpack ${archive}
;;
esac
done
cargo_gen_config
}
# @FUNCTION: cargo_live_src_unpack
# @DESCRIPTION:
# Runs 'cargo fetch' and vendors downloaded crates for offline use, used in live ebuilds
cargo_live_src_unpack() {
debug-print-function ${FUNCNAME} "$@"
[[ "${PV}" == *9999* ]] || die "${FUNCNAME} only allowed in live/9999 ebuilds"
[[ "${EBUILD_PHASE}" == unpack ]] || die "${FUNCNAME} only allowed in src_unpack"
mkdir -p "${S}" || die
mkdir -p "${ECARGO_VENDOR}" || die
mkdir -p "${ECARGO_HOME}" || die
local distdir=${PORTAGE_ACTUAL_DISTDIR:-${DISTDIR}}
: ${ECARGO_REGISTRY_DIR:=${distdir}/cargo-registry}
local offline="${ECARGO_OFFLINE:-${EVCS_OFFLINE}}"
if [[ ! -d ${ECARGO_REGISTRY_DIR} && ! ${offline} ]]; then
(
addwrite "${ECARGO_REGISTRY_DIR}"
mkdir -p "${ECARGO_REGISTRY_DIR}"
) || die "Unable to create ${ECARGO_REGISTRY_DIR}"
fi
if [[ ${offline} ]]; then
local subdir
for subdir in cache index src; do
if [[ ! -d ${ECARGO_REGISTRY_DIR}/registry/${subdir} ]]; then
eerror "Networking activity has been disabled via ECARGO_OFFLINE or EVCS_OFFLINE"
eerror "However, no valid cargo registry available at ${ECARGO_REGISTRY_DIR}"
die "Unable to proceed with ECARGO_OFFLINE/EVCS_OFFLINE."
fi
done
fi
if [[ ${EVCS_UMASK} ]]; then
local saved_umask=$(umask)
umask "${EVCS_UMASK}" || die "Bad options to umask: ${EVCS_UMASK}"
fi
pushd "${S}" > /dev/null || die
# Respect user settings befire cargo_gen_config is called.
if [[ ! ${CARGO_TERM_COLOR} ]]; then
[[ "${NOCOLOR}" = true || "${NOCOLOR}" = yes ]] && export CARGO_TERM_COLOR=never
local unset_color=true
fi
if [[ ! ${CARGO_TERM_VERBOSE} ]]; then
export CARGO_TERM_VERBOSE=true
local unset_verbose=true
fi
# Let cargo fetch to system-wide location.
# It will keep directory organized by itself.
addwrite "${ECARGO_REGISTRY_DIR}"
export CARGO_HOME="${ECARGO_REGISTRY_DIR}"
# Absence of quotes around offline arg is intentional, as cargo bails out if it encounters ''
einfo "cargo fetch ${offline:+--offline}"
cargo fetch ${offline:+--offline} || die #nowarn
# Let cargo copy all required crates to "${WORKDIR}" for offline use in later phases.
einfo "cargo vendor ${offline:+--offline} ${ECARGO_VENDOR}"
cargo vendor ${offline:+--offline} "${ECARGO_VENDOR}" || die #nowarn
# Users may have git checkouts made by cargo.
# While cargo vendors the sources, it still needs git checkout to be present.
# Copying full dir is an overkill, so just symlink it.
if [[ -d ${ECARGO_REGISTRY_DIR}/git ]]; then
ln -sv "${ECARGO_REGISTRY_DIR}/git" "${ECARGO_HOME}/git" || die
fi
popd > /dev/null || die
# Restore settings if needed.
[[ ${unset_color} ]] && unset CARGO_TERM_COLOR
[[ ${unset_verbose} ]] && unset CARGO_TERM_VERBOSE
if [[ ${saved_umask} ]]; then
umask "${saved_umask}" || die
fi
# After following calls, cargo will no longer use ${ECARGO_REGISTRY_DIR} as CARGO_HOME
# It will be forced into offline mode to prevent network access.
# But since we already vendored crates and symlinked git, it has all it needs to build.
unset CARGO_HOME
cargo_gen_config
}
# @FUNCTION: cargo_src_configure
# @DESCRIPTION:
# Configure cargo package features and arguments.
# Extra positional arguments supplied to this function
# will be passed to cargo in all phases.
# Make sure all cargo subcommands support flags passed here.
#
# Example for package that explicitly builds only 'baz' binary and
# enables 'barfeature' and optional 'foo' feature.
# will pass '--features barfeature --features foo --bin baz'
# in src_{compile,test,install}
#
# @CODE
# src_configure() {
# local myfeatures=(
# barfeature
# $(usev foo)
# )
# cargo_src_configure --bin baz
# }
# @CODE
#
# In some cases crates may need '--no-default-features' option,
# as there is no way to disable single feature, except disabling all.
# It can be passed directly to cargo_src_configure().
cargo_src_configure() {
debug-print-function ${FUNCNAME} "$@"
[[ -z ${myfeatures} ]] && declare -a myfeatures=()
local myfeaturestype=$(declare -p myfeatures 2>&-)
if [[ "${myfeaturestype}" != "declare -a myfeatures="* ]]; then
die "myfeatures must be declared as array"
fi
# transform array from simple feature list
# to multiple cargo args:
# --features feature1 --features feature2 ...
# this format is chosen because 2 other methods of
# listing features (space OR comma separated) require
# more fiddling with strings we'd like to avoid here.
myfeatures=( ${myfeatures[@]/#/--features } )
readonly ECARGO_ARGS=( ${myfeatures[@]} ${@} ${ECARGO_EXTRA_ARGS} )
[[ ${ECARGO_ARGS[@]} ]] && einfo "Configured with: ${ECARGO_ARGS[@]}"
}
# @FUNCTION: cargo_src_compile
# @DESCRIPTION:
# Build the package using cargo build
cargo_src_compile() {
debug-print-function ${FUNCNAME} "$@"
[[ ${_CARGO_GEN_CONFIG_HAS_RUN} ]] || \
die "FATAL: please call cargo_gen_config before using ${FUNCNAME}"
tc-export AR CC CXX PKG_CONFIG
set -- cargo build $(usex debug "" --release) ${ECARGO_ARGS[@]} "$@"
einfo "${@}"
"${@}" || die "cargo build failed"
}
# @FUNCTION: cargo_src_install
# @DESCRIPTION:
# Installs the binaries generated by cargo
# In come case workspaces need alternative --path parameter
# default is '--path ./' if nothing specified.
# '--path ./somedir' can be passed directly to cargo_src_install()
cargo_src_install() {
debug-print-function ${FUNCNAME} "$@"
[[ ${_CARGO_GEN_CONFIG_HAS_RUN} ]] || \
die "FATAL: please call cargo_gen_config before using ${FUNCNAME}"
set -- cargo install $(has --path ${@} || echo --path ./) \
--root "${ED}/usr" \
$(usex debug --debug "") \
${ECARGO_ARGS[@]} "$@"
einfo "${@}"
"${@}" || die "cargo install failed"
rm -f "${ED}/usr/.crates.toml" || die
rm -f "${ED}/usr/.crates2.json" || die
# it turned out to be non-standard dir, so get rid of it future EAPI
# and only run for EAPI=7
# https://bugs.gentoo.org/715890
case ${EAPI:-0} in
7)
if [ -d "${S}/man" ]; then
doman "${S}/man" || return 0
fi
;;
esac
}
# @FUNCTION: cargo_src_test
# @DESCRIPTION:
# Test the package using cargo test
cargo_src_test() {
debug-print-function ${FUNCNAME} "$@"
[[ ${_CARGO_GEN_CONFIG_HAS_RUN} ]] || \
die "FATAL: please call cargo_gen_config before using ${FUNCNAME}"
set -- cargo test $(usex debug "" --release) ${ECARGO_ARGS[@]} "$@"
einfo "${@}"
"${@}" || die "cargo test failed"
}
fi