summaryrefslogtreecommitdiff
blob: 6776a4b03ac6423bc0ffa9844c43e55db415fda2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

# @ECLASS: cargo.eclass
# @MAINTAINER:
# rust@gentoo.org
# @AUTHOR:
# Doug Goldstein <cardoe@gentoo.org>
# @SUPPORTED_EAPIS: 6 7
# @BLURB: common functions and variables for cargo builds

if [[ -z ${_CARGO_ECLASS} ]]; then
_CARGO_ECLASS=1

# we need this for 'cargo vendor' subcommand and net.offline config knob
RUST_DEPEND=">=virtual/rust-1.37.0"

case ${EAPI} in
	6) DEPEND="${RUST_DEPEND}";;
	7) BDEPEND="${RUST_DEPEND}";;
	*) die "EAPI=${EAPI:-0} is not supported" ;;
esac

inherit multiprocessing

EXPORT_FUNCTIONS src_unpack src_compile src_install src_test

IUSE="${IUSE} debug"

ECARGO_HOME="${WORKDIR}/cargo_home"
ECARGO_VENDOR="${ECARGO_HOME}/gentoo"

# @ECLASS-VARIABLE: CARGO_INSTALL_PATH
# @DESCRIPTION:
# Allows overriding the default cwd to run cargo install from
: ${CARGO_INSTALL_PATH:=.}

# @FUNCTION: cargo_crate_uris
# @DESCRIPTION:
# Generates the URIs to put in SRC_URI to help fetch dependencies.
cargo_crate_uris() {
	local -r regex='^(.*)-([0-9]+\.[0-9]+\.[0-9]+.*)$'
	local crate
	for crate in "$@"; 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_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_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

	pushd "${S}" > /dev/null || die
	CARGO_HOME="${ECARGO_HOME}" cargo fetch || die
	CARGO_HOME="${ECARGO_HOME}" cargo vendor "${ECARGO_VENDOR}" || die
	popd > /dev/null || die

	cargo_gen_config
}

# @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 precedent 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 ${FUNCNAME} "$@"

	cat <<- EOF > "${ECARGO_HOME}/config"
	[source.gentoo]
	directory = "${ECARGO_VENDOR}"

	[source.crates-io]
	replace-with = "gentoo"
	local-registry = "/nonexistant"

	[net]
	offline = true

	[build]
	jobs = $(makeopts_jobs)

	[term]
	verbose = true
	EOF
	# honor NOCOLOR setting
	[[ "${NOCOLOR}" = true || "${NOCOLOR}" = yes ]] && echo "color = 'never'" >> "${ECARGO_HOME}/config"
}

# @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 $(usex debug "" --release) "$@" \
		|| die "cargo build failed"
}

# @FUNCTION: cargo_src_install
# @DESCRIPTION:
# Installs the binaries generated by cargo
cargo_src_install() {
	debug-print-function ${FUNCNAME} "$@"

	cargo install --path ${CARGO_INSTALL_PATH} \
		--root="${ED}/usr" $(usex debug --debug "") "$@" \
		|| die "cargo install failed"
	rm -f "${ED}/usr/.crates.toml"
	rm -f "${ED}/usr/.crates2.json"

	[ -d "${S}/man" ] && doman "${S}/man" || return 0
}

# @FUNCTION: cargo_src_test
# @DESCRIPTION:
# Test the package using cargo test
cargo_src_test() {
	debug-print-function ${FUNCNAME} "$@"

	cargo test $(usex debug "" --release) "$@" \
		|| die "cargo test failed"
}

fi