summaryrefslogtreecommitdiff
blob: 911ddabced14454f43af942a13267b7df0458785 (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
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
# Copyright 1999-2023 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>
# Georgy Yakovlev <gyakovlev@gentoo.org>
# @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: GIT_CRATES
# @DEFAULT_UNSET
# @DESCRIPTION:
# bash associative array containing all crates that a package wants
# to be fetch by git.
# The key is the crate name, the value is a semicolon separated list of
# the following fields:
#
# - the URI to to fetch the crate from
#     - this intelligentally handles GitHub URIs and GitLab URIs so
#       just the path is needed.
#     - the string "%commit%" gets replaced with the commit
# - the hash of the commit to use
# - (optional) the path to look for Cargo.toml in
#   - this will also replace  the string "%commit%" with the commit
#   - if this not provided, it will be generated using the crate name and
#     the commit
# Used by cargo_crate_uris
#
# If this is defined, then cargo_src_install will add --frozen to "cargo install"
#
# Example of simple definition of GIT_CRATES without any paths defined
# @CODE
# declare -A GIT_CRATES=(
# 	[home]="https://github.com/rbtcollins/home;a243ee2fbee6022c57d56f5aa79aefe194eabe53"
# )
# @CODE
#
# Example code of how to define GIT_CRATES with paths defined.
# @CODE
# declare -A GIT_CRATES=(
# 	[rustpython-common]="https://github.com/RustPython/RustPython;4f38cb68e4a97aeea9eb19673803a0bd5f655383;RustPython-%commit%/common"
# 	[rustpython-parser]="https://github.com/RustPython/RustPython;4f38cb68e4a97aeea9eb19673803a0bd5f655383;RustPython-%commit%/compiler/parser"
# )
# @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

	local git_crates_type
	git_crates_type="$(declare -p GIT_CRATES 2>&-)"
	if [[ ${git_crates_type} == "declare -A "* ]]; then
		local crate commit crate_uri crate_dir repo_ext feat_expr

		for crate in "${!GIT_CRATES[@]}"; do
			IFS=';' read -r crate_uri commit crate_dir <<< "${GIT_CRATES[${crate}]}"

			case "${crate_uri}" in
				https://github.com/*)
					repo_ext=".gh"
					repo_name="${crate_uri##*/}"
					crate_uri="${crate_uri%/}/archive/%commit%.tar.gz"
				;;
				https://gitlab.com/*)
					repo_ext=".gl"
					repo_name="${crate_uri##*/}"
					crate_uri="${crate_uri%/}/archive/-/%commit%/${repo_name}/%commit%.tar.gz"
				;;
				*)
					repo_ext=
					repo_name="${crate}"
				;;
			esac

			printf -- '%s -> %s\n' "${crate_uri//%commit%/${commit}}" "${repo_name}-${commit}${repo_ext}.tar.gz"
		done
	elif [[ -n ${git_crates_type} ]]; then
		die "GIT_CRATE must be declared as an associative array"
	fi
}

# @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'")
	$(_cargo_gen_git_config)
	_EOF_

	export CARGO_HOME="${ECARGO_HOME}"
	_CARGO_GEN_CONFIG_HAS_RUN=1
}

# @FUNCTION: _cargo_gen_git_config
# @USAGE:
# @INTERNAL
# @DESCRIPTION:
# Generate the cargo config for git crates, this will output the
# configuration for cargo to override the cargo config so the local git crates
# specified in GIT_CRATES will be used rather than attempting to fetch
# from git.
#
# Called by cargo_gen_config when generating the config.
_cargo_gen_git_config() {
	local git_crates_type
	git_crates_type="$(declare -p GIT_CRATES 2>&-)"

	if [[ ${git_crates_type} == "declare -A "* ]]; then
		local crate commit crate_uri crate_dir
		local -A crate_patches

		for crate in "${!GIT_CRATES[@]}"; do
			IFS=';' read -r crate_uri commit crate_dir <<< "${GIT_CRATES[${crate}]}"
			: "${crate_dir:=${crate}-%commit%}"
			crate_patches["${crate_uri}"]+="${crate} = { path = \"${WORKDIR}/${crate_dir//%commit%/${commit}}\" };;"
		done

		for crate_uri in "${!crate_patches[@]}"; do
			printf -- "[patch.'%s']\\n%s\n" "${crate_uri}" "${crate_patches["${crate_uri}"]//;;/$'\n'}"
		done

	elif [[ -n ${git_crates_type} ]]; then
		die "GIT_CRATE must be declared as an associative array"
	fi
}

# @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.
# NOTE: might require passing --frozen to cargo_src_configure if git dependencies are used.
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().
#
# Some live/9999 ebuild may need '--frozen' option, if git crates
# are used.
# Otherwise src_install phase may query network again and fail.
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" \
		${GIT_CRATES[@]:+--frozen} \
		$(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