summaryrefslogtreecommitdiff
blob: 092c0887d8782b42a26d5ae0f01a4d7d5ca35532 (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
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

# @ECLASS: distutils-r1.eclass
# @MAINTAINER:
# Python team <python@gentoo.org>
# @AUTHOR:
# Author: Michał Górny <mgorny@gentoo.org>
# Based on the work of: Krzysztof Pawlik <nelchael@gentoo.org>
# @SUPPORTED_EAPIS: 5 6 7
# @BLURB: A simple eclass to build Python packages using distutils.
# @DESCRIPTION:
# A simple eclass providing functions to build Python packages using
# the distutils build system. It exports phase functions for all
# the src_* phases. Each of the phases runs two pseudo-phases:
# python_..._all() (e.g. python_prepare_all()) once in ${S}, then
# python_...() (e.g. python_prepare()) for each implementation
# (see: python_foreach_impl() in python-r1).
#
# In distutils-r1_src_prepare(), the 'all' function is run before
# per-implementation ones (because it creates the implementations),
# per-implementation functions are run in a random order.
#
# In remaining phase functions, the per-implementation functions are run
# before the 'all' one, and they are ordered from the least to the most
# preferred implementation (so that 'better' files overwrite 'worse'
# ones).
#
# If the ebuild doesn't specify a particular pseudo-phase function,
# the default one will be used (distutils-r1_...). Defaults are provided
# for all per-implementation pseudo-phases, python_prepare_all()
# and python_install_all(); whenever writing your own pseudo-phase
# functions, you should consider calling the defaults (and especially
# distutils-r1_python_prepare_all).
#
# Please note that distutils-r1 sets RDEPEND and DEPEND unconditionally
# for you.
#
# Also, please note that distutils-r1 will always inherit python-r1
# as well. Thus, all the variables defined and documented there are
# relevant to the packages using distutils-r1.
#
# For more information, please see the Python Guide:
# https://dev.gentoo.org/~mgorny/python-guide/

case "${EAPI:-0}" in
	0|1|2|3|4)
		die "Unsupported EAPI=${EAPI:-0} (too old) for ${ECLASS}"
		;;
	5|6|7)
		;;
	*)
		die "Unsupported EAPI=${EAPI} (unknown) for ${ECLASS}"
		;;
esac

# @ECLASS-VARIABLE: DISTUTILS_OPTIONAL
# @DEFAULT_UNSET
# @DESCRIPTION:
# If set to a non-null value, distutils part in the ebuild will
# be considered optional. No dependencies will be added and no phase
# functions will be exported.
#
# If you enable DISTUTILS_OPTIONAL, you have to set proper dependencies
# for your package (using ${PYTHON_DEPS}) and to either call
# distutils-r1 default phase functions or call the build system
# manually.

# @ECLASS-VARIABLE: DISTUTILS_SINGLE_IMPL
# @DEFAULT_UNSET
# @DESCRIPTION:
# If set to a non-null value, the ebuild will support setting a single
# Python implementation only. It will effectively replace the python-r1
# eclass inherit with python-single-r1.
#
# Note that inheriting python-single-r1 will cause pkg_setup()
# to be exported. It must be run in order for the eclass functions
# to function properly.

# @ECLASS-VARIABLE: DISTUTILS_USE_SETUPTOOLS
# @PRE_INHERIT
# @DESCRIPTION:
# Controls adding dev-python/setuptools dependency.  The allowed values
# are:
#
# - no -- do not add the dependency (pure distutils package)
# - bdepend -- add it to BDEPEND (the default)
# - rdepend -- add it to BDEPEND+RDEPEND (when using entry_points)
# - pyproject.toml -- use pyproject2setuptools to install a project
#                     using pyproject.toml (flit, poetry...)
# - manual -- do not add the depedency and suppress the checks
#             (assumes you will take care of doing it correctly)
#
# This variable is effective only if DISTUTILS_OPTIONAL is disabled.
# It needs to be set before the inherit line.
: ${DISTUTILS_USE_SETUPTOOLS:=bdepend}

if [[ ! ${_DISTUTILS_R1} ]]; then

[[ ${EAPI} == [456] ]] && inherit eutils
[[ ${EAPI} == [56] ]] && inherit xdg-utils
inherit multiprocessing toolchain-funcs

if [[ ! ${DISTUTILS_SINGLE_IMPL} ]]; then
	inherit python-r1
else
	inherit python-single-r1
fi

fi

if [[ ! ${DISTUTILS_OPTIONAL} ]]; then
	EXPORT_FUNCTIONS src_prepare src_configure src_compile src_test src_install
fi

if [[ ! ${_DISTUTILS_R1} ]]; then

_distutils_set_globals() {
	local rdep bdep
	local setuptools_dep='>=dev-python/setuptools-42.0.2[${PYTHON_USEDEP}]'

	case ${DISTUTILS_USE_SETUPTOOLS} in
		no|manual)
			;;
		bdepend)
			bdep+=" ${setuptools_dep}"
			;;
		rdepend)
			bdep+=" ${setuptools_dep}"
			rdep+=" ${setuptools_dep}"
			;;
		pyproject.toml)
			bdep+=' dev-python/pyproject2setuppy[${PYTHON_USEDEP}]'
			;;
		*)
			die "Invalid DISTUTILS_USE_SETUPTOOLS=${DISTUTILS_USE_SETUPTOOLS}"
			;;
	esac

	if [[ ! ${DISTUTILS_SINGLE_IMPL} ]]; then
		bdep=${bdep//\$\{PYTHON_USEDEP\}/${PYTHON_USEDEP}}
		rdep=${rdep//\$\{PYTHON_USEDEP\}/${PYTHON_USEDEP}}
	else
		[[ -n ${bdep} ]] && bdep="$(python_gen_cond_dep "${bdep}")"
		[[ -n ${rdep} ]] && rdep="$(python_gen_cond_dep "${rdep}")"
	fi

	RDEPEND="${PYTHON_DEPS} ${rdep}"
	if [[ ${EAPI} != [56] ]]; then
		BDEPEND="${PYTHON_DEPS} ${bdep}"
	else
		DEPEND="${PYTHON_DEPS} ${bdep}"
	fi
	REQUIRED_USE=${PYTHON_REQUIRED_USE}
}
[[ ! ${DISTUTILS_OPTIONAL} ]] && _distutils_set_globals
unset -f _distutils_set_globals

# @ECLASS-VARIABLE: PATCHES
# @DEFAULT_UNSET
# @DESCRIPTION:
# An array containing patches to be applied to the sources before
# copying them.
#
# If unset, no custom patches will be applied.
#
# Please note, however, that at some point the eclass may apply
# additional distutils patches/quirks independently of this variable.
#
# Example:
# @CODE
# PATCHES=( "${FILESDIR}"/${P}-make-gentoo-happy.patch )
# @CODE

# @ECLASS-VARIABLE: DOCS
# @DEFAULT_UNSET
# @DESCRIPTION:
# An array containing documents installed using dodoc. The files listed
# there must exist in the directory from which
# distutils-r1_python_install_all() is run (${S} by default).
#
# If unset, the function will instead look up files matching default
# filename pattern list (from the Package Manager Specification),
# and install those found.
#
# Example:
# @CODE
# DOCS=( NEWS README )
# @CODE

# @ECLASS-VARIABLE: HTML_DOCS
# @DEFAULT_UNSET
# @DESCRIPTION:
# An array containing documents installed using dohtml. The files
# and directories listed there must exist in the directory from which
# distutils-r1_python_install_all() is run (${S} by default).
#
# If unset, no HTML docs will be installed.
#
# Example:
# @CODE
# HTML_DOCS=( doc/html/. )
# @CODE

# @ECLASS-VARIABLE: EXAMPLES
# @DEFAULT_UNSET
# @DESCRIPTION:
# OBSOLETE: this variable is deprecated and banned in EAPI 6
#
# An array containing examples installed into 'examples' doc
# subdirectory. The files and directories listed there must exist
# in the directory from which distutils-r1_python_install_all() is run
# (${S} by default).
#
# The 'examples' subdirectory will be marked not to be compressed
# automatically.
#
# If unset, no examples will be installed.
#
# Example:
# @CODE
# EXAMPLES=( examples/. demos/. )
# @CODE

# @ECLASS-VARIABLE: DISTUTILS_IN_SOURCE_BUILD
# @DEFAULT_UNSET
# @DESCRIPTION:
# If set to a non-null value, in-source builds will be enabled.
# If unset, the default is to use in-source builds when python_prepare()
# is declared, and out-of-source builds otherwise.
#
# If in-source builds are used, the eclass will create a copy of package
# sources for each Python implementation in python_prepare_all(),
# and work on that copy afterwards.
#
# If out-of-source builds are used, the eclass will instead work
# on the sources directly, prepending setup.py arguments with
# 'build --build-base ${BUILD_DIR}' to enforce keeping & using built
# files in the specific root.

# @ECLASS-VARIABLE: DISTUTILS_ALL_SUBPHASE_IMPLS
# @DEFAULT_UNSET
# @DESCRIPTION:
# An array of patterns specifying which implementations can be used
# for *_all() sub-phase functions. If undefined, defaults to '*'
# (allowing any implementation). If multiple values are specified,
# implementations matching any of the patterns will be accepted.
#
# The patterns can be either fnmatch-style patterns (matched via bash
# == operator against PYTHON_COMPAT values) or '-2' / '-3' to indicate
# appropriately all enabled Python 2/3 implementations (alike
# python_is_python3). Remember to escape or quote the fnmatch patterns
# to prevent accidental shell filename expansion.
#
# If the restriction needs to apply conditionally to a USE flag,
# the variable should be set conditionally as well (e.g. in an early
# phase function or other convenient location).
#
# Please remember to add a matching || block to REQUIRED_USE,
# to ensure that at least one implementation matching the patterns will
# be enabled.
#
# Example:
# @CODE
# REQUIRED_USE="doc? ( || ( $(python_gen_useflags 'python2*') ) )"
#
# pkg_setup() {
#     use doc && DISTUTILS_ALL_SUBPHASE_IMPLS=( 'python2*' )
# }
# @CODE

# @ECLASS-VARIABLE: mydistutilsargs
# @DEFAULT_UNSET
# @DESCRIPTION:
# An array containing options to be passed to setup.py.
#
# Example:
# @CODE
# python_configure_all() {
# 	mydistutilsargs=( --enable-my-hidden-option )
# }
# @CODE

# @FUNCTION: distutils_enable_sphinx
# @USAGE: <subdir> [--no-autodoc | <plugin-pkgs>...]
# @DESCRIPTION:
# Set up IUSE, BDEPEND, python_check_deps() and python_compile_all() for
# building HTML docs via dev-python/sphinx.  python_compile_all() will
# append to HTML_DOCS if docs are enabled.
#
# This helper is meant for the most common case, that is a single Sphinx
# subdirectory with standard layout, building and installing HTML docs
# behind USE=doc.  It assumes it's the only consumer of the three
# aforementioned functions.  If you need to use a custom implemention,
# you can't use it.
#
# If your package uses additional Sphinx plugins, they should be passed
# (without PYTHON_USEDEP) as <plugin-pkgs>.  The function will take care
# of setting appropriate any-of dep and python_check_deps().
#
# If no plugin packages are specified, the eclass will still utilize
# any-r1 API to support autodoc (documenting source code).
# If the package uses neither autodoc nor additional plugins, you should
# pass --no-autodoc to disable this API and simplify the resulting code.
#
# This function must be called in global scope.  Take care not to
# overwrite the variables set by it.  If you need to extend
# python_compile_all(), you can call the original implementation
# as sphinx_compile_all.
distutils_enable_sphinx() {
	debug-print-function ${FUNCNAME} "${@}"
	[[ ${#} -ge 1 ]] || die "${FUNCNAME} takes at least one arg: <subdir>"

	_DISTUTILS_SPHINX_SUBDIR=${1}
	shift
	_DISTUTILS_SPHINX_PLUGINS=( "${@}" )

	local deps autodoc=1 d
	for d; do
		if [[ ${d} == --no-autodoc ]]; then
			autodoc=
		else
			deps+="
				${d}[\${PYTHON_USEDEP}]"
		fi
	done

	if [[ ! ${autodoc} && -n ${deps} ]]; then
		die "${FUNCNAME}: do not pass --no-autodoc if external plugins are used"
	fi
	if [[ ${autodoc} ]]; then
		deps="$(python_gen_any_dep "
			dev-python/sphinx[\${PYTHON_USEDEP}]
			${deps}")"

		python_check_deps() {
			use doc || return 0
			local p
			for p in dev-python/sphinx "${_DISTUTILS_SPHINX_PLUGINS[@]}"; do
				has_version "${p}[${PYTHON_USEDEP}]" || return 1
			done
		}
	else
		deps="dev-python/sphinx"
	fi

	sphinx_compile_all() {
		use doc || return

		local confpy=${_DISTUTILS_SPHINX_SUBDIR}/conf.py
		[[ -f ${confpy} ]] ||
			die "${confpy} not found, distutils_enable_sphinx call wrong"

		if [[ ${_DISTUTILS_SPHINX_PLUGINS[0]} == --no-autodoc ]]; then
			if grep -F -q 'sphinx.ext.autodoc' "${confpy}"; then
				die "distutils_enable_sphinx: --no-autodoc passed but sphinx.ext.autodoc found in ${confpy}"
			fi
		elif [[ -z ${_DISTUTILS_SPHINX_PLUGINS[@]} ]]; then
			if ! grep -F -q 'sphinx.ext.autodoc' "${confpy}"; then
				die "distutils_enable_sphinx: sphinx.ext.autodoc not found in ${confpy}, pass --no-autodoc"
			fi
		fi

		build_sphinx "${_DISTUTILS_SPHINX_SUBDIR}"
	}
	python_compile_all() { sphinx_compile_all; }

	IUSE+=" doc"
	if [[ ${EAPI} == [56] ]]; then
		DEPEND+=" doc? ( ${deps} )"
	else
		BDEPEND+=" doc? ( ${deps} )"
	fi

	# we need to ensure successful return in case we're called last,
	# otherwise Portage may wrongly assume sourcing failed
	return 0
}

# @FUNCTION: distutils_enable_tests
# @USAGE: <test-runner>
# @DESCRIPTION:
# Set up IUSE, RESTRICT, BDEPEND and python_test() for running tests
# with the specified test runner.  Also copies the current value
# of RDEPEND to test?-BDEPEND.  The test-runner argument must be one of:
#
# - nose: nosetests (dev-python/nose)
# - pytest: dev-python/pytest
# - setup.py: setup.py test (no deps included)
# - unittest: for built-in Python unittest module
#
# This function is meant as a helper for common use cases, and it only
# takes care of basic setup.  You still need to list additional test
# dependencies manually.  If you have uncommon use case, you should
# not use it and instead enable tests manually.
#
# This function must be called in global scope, after RDEPEND has been
# declared.  Take care not to overwrite the variables set by it.
distutils_enable_tests() {
	debug-print-function ${FUNCNAME} "${@}"
	[[ ${#} -eq 1 ]] || die "${FUNCNAME} takes exactly one argument: test-runner"

	local test_pkg
	case ${1} in
		nose)
			test_pkg=">=dev-python/nose-1.3.7-r4"
			python_test() {
				nosetests -v || die "Tests fail with ${EPYTHON}"
			}
			;;
		pytest)
			test_pkg=">=dev-python/pytest-4.5.0"
			python_test() {
				pytest -vv || die "Tests fail with ${EPYTHON}"
			}
			;;
		setup.py)
			python_test() {
				nonfatal esetup.py test --verbose ||
					die "Tests fail with ${EPYTHON}"
			}
			;;
		unittest)
			python_test() {
				"${EPYTHON}" -m unittest discover -v ||
					die "Tests fail with ${EPYTHON}"
			}
			;;
		*)
			die "${FUNCNAME}: unsupported argument: ${1}"
	esac

	local test_deps=${RDEPEND}
	if [[ -n ${test_pkg} ]]; then
		if [[ ! ${DISTUTILS_SINGLE_IMPL} ]]; then
			test_deps+=" ${test_pkg}[${PYTHON_USEDEP}]"
		else
			test_deps+=" $(python_gen_cond_dep "
				${test_pkg}[\${PYTHON_MULTI_USEDEP}]
			")"
		fi
	fi
	if [[ -n ${test_deps} ]]; then
		IUSE+=" test"
		RESTRICT+=" !test? ( test )"
		if [[ ${EAPI} == [56] ]]; then
			DEPEND+=" test? ( ${test_deps} )"
		else
			BDEPEND+=" test? ( ${test_deps} )"
		fi
	fi

	# we need to ensure successful return in case we're called last,
	# otherwise Portage may wrongly assume sourcing failed
	return 0
}

# @FUNCTION: _distutils-r1_verify_use_setuptools
# @INTERNAL
# @DESCRIPTION:
# Check setup.py for signs that DISTUTILS_USE_SETUPTOOLS have been set
# incorrectly.
_distutils_verify_use_setuptools() {
	[[ ${DISTUTILS_OPTIONAL} ]] && return
	[[ ${DISTUTILS_USE_SETUPTOOLS} == manual ]] && return
	[[ ${DISTUTILS_USE_SETUPTOOLS} == pyproject.toml ]] && return

	# ok, those are cheap greps.  we can try toimprove them if we hit
	# false positives.
	local expected=no
	if [[ ${CATEGORY}/${PN} == dev-python/setuptools ]]; then
		# as a special case, setuptools provides itself ;-)
		:
	elif grep -E -q -s '(from|import)\s+setuptools' setup.py; then
		if grep -E -q -s 'entry_points\s*=' setup.py; then
			expected=rdepend
		elif grep -F -q -s '[options.entry_points]' setup.cfg; then
			expected=rdepend
		elif grep -F -q -s '[entry_points]' setup.cfg; then  # pbr
			expected=rdepend
		else
			expected=bdepend
		fi
	fi

	if [[ ${DISTUTILS_USE_SETUPTOOLS} != ${expected} ]]; then
		if [[ ! ${_DISTUTILS_SETUPTOOLS_WARNED} ]]; then
			_DISTUTILS_SETUPTOOLS_WARNED=1
			local def=
			[[ ${DISTUTILS_USE_SETUPTOOLS} == bdepend ]] && def=' (default?)'

			eqawarn "DISTUTILS_USE_SETUPTOOLS value is probably incorrect"
			eqawarn "  value:    DISTUTILS_USE_SETUPTOOLS=${DISTUTILS_USE_SETUPTOOLS}${def}"
			eqawarn "  expected: DISTUTILS_USE_SETUPTOOLS=${expected}"
		fi
	fi
}

# @FUNCTION: esetup.py
# @USAGE: [<args>...]
# @DESCRIPTION:
# Run setup.py using currently selected Python interpreter
# (if ${EPYTHON} is set; fallback 'python' otherwise).
#
# setup.py will be passed the following, in order:
# 1. ${mydistutilsargs[@]}
# 2. additional arguments passed to the esetup.py function.
#
# Please note that setup.py will respect defaults (unless overridden
# via command-line options) from setup.cfg that is created
# in distutils-r1_python_compile and in distutils-r1_python_install.
#
# This command dies on failure.
esetup.py() {
	debug-print-function ${FUNCNAME} "${@}"

	local die_args=()
	[[ ${EAPI} != [45] ]] && die_args+=( -n )

	[[ ${BUILD_DIR} ]] && _distutils-r1_create_setup_cfg
	_distutils_verify_use_setuptools

	set -- "${EPYTHON:-python}" setup.py "${mydistutilsargs[@]}" "${@}"

	echo "${@}" >&2
	"${@}" || die "${die_args[@]}"
	local ret=${?}

	if [[ ${BUILD_DIR} ]]; then
		rm "${HOME}"/.pydistutils.cfg || die "${die_args[@]}"
	fi

	return ${ret}
}

# @FUNCTION: distutils_install_for_testing
# @USAGE: [<args>...]
# @DESCRIPTION:
# Install the package into a temporary location for running tests.
# Update PYTHONPATH appropriately and set TEST_DIR to the test
# installation root. The Python packages will be installed in 'lib'
# subdir, and scripts in 'scripts' subdir (like in BUILD_DIR).
#
# Please note that this function should be only used if package uses
# namespaces (and therefore proper install needs to be done to enforce
# PYTHONPATH) or tests rely on the results of install command.
# For most of the packages, tests built in BUILD_DIR are good enough.
distutils_install_for_testing() {
	debug-print-function ${FUNCNAME} "${@}"

	# A few notes:
	# 1) because of namespaces, we can't use 'install --root',
	# 2) 'install --home' is terribly broken on pypy, so we need
	#    to override --install-lib and --install-scripts,
	# 3) non-root 'install' complains about PYTHONPATH and missing dirs,
	#    so we need to set it properly and mkdir them,
	# 4) it runs a bunch of commands which write random files to cwd,
	#    in order to avoid that, we add the necessary path overrides
	#    in _distutils-r1_create_setup_cfg.

	TEST_DIR=${BUILD_DIR}/test
	local bindir=${TEST_DIR}/scripts
	local libdir=${TEST_DIR}/lib
	PYTHONPATH=${libdir}:${PYTHONPATH}

	local add_args=(
		install
			--home="${TEST_DIR}"
			--install-lib="${libdir}"
			--install-scripts="${bindir}"
	)

	mkdir -p "${libdir}" || die
	esetup.py "${add_args[@]}" "${@}"
}

# @FUNCTION: _distutils-r1_disable_ez_setup
# @INTERNAL
# @DESCRIPTION:
# Stub out ez_setup.py and distribute_setup.py to prevent packages
# from trying to download a local copy of setuptools.
_distutils-r1_disable_ez_setup() {
	local stub="def use_setuptools(*args, **kwargs): pass"
	if [[ -f ez_setup.py ]]; then
		echo "${stub}" > ez_setup.py || die
	fi
	if [[ -f distribute_setup.py ]]; then
		echo "${stub}" > distribute_setup.py || die
	fi
}

# @FUNCTION: _distutils-r1_handle_pyproject_toml
# @INTERNAL
# @DESCRIPTION:
# Generate setup.py for pyproject.toml if requested.
_distutils-r1_handle_pyproject_toml() {
	if [[ ! -f setup.py && -f pyproject.toml ]]; then
		if [[ ${DISTUTILS_USE_SETUPTOOLS} == pyproject.toml ]]; then
			cat > setup.py <<-EOF || die
				#!/usr/bin/env python
				from pyproject2setuppy.main import main
				main()
			EOF
			chmod +x setup.py || die
		else
			eerror "No setup.py found but pyproject.toml is present.  In order to enable"
			eerror "pyproject.toml support in distutils-r1, set:"
			eerror "  DISTUTILS_USE_SETUPTOOLS=pyproject.toml"
			die "No setup.py found and DISTUTILS_USE_SETUPTOOLS!=pyproject.toml"
		fi
	fi
}

# @FUNCTION: distutils-r1_python_prepare_all
# @DESCRIPTION:
# The default python_prepare_all(). It applies the patches from PATCHES
# array, then user patches and finally calls python_copy_sources to
# create copies of resulting sources for each Python implementation.
#
# At some point in the future, it may also apply eclass-specific
# distutils patches and/or quirks.
distutils-r1_python_prepare_all() {
	debug-print-function ${FUNCNAME} "${@}"

	if [[ ! ${DISTUTILS_OPTIONAL} ]]; then
		if [[ ${EAPI} != [45] ]]; then
			default
		else
			[[ ${PATCHES} ]] && epatch "${PATCHES[@]}"
			epatch_user
		fi
	fi

	# by default, use in-source build if python_prepare() is used
	if [[ ! ${DISTUTILS_IN_SOURCE_BUILD+1} ]]; then
		if declare -f python_prepare >/dev/null; then
			DISTUTILS_IN_SOURCE_BUILD=1
		fi
	fi

	_distutils-r1_disable_ez_setup
	_distutils-r1_handle_pyproject_toml

	if [[ ${DISTUTILS_IN_SOURCE_BUILD} && ! ${DISTUTILS_SINGLE_IMPL} ]]
	then
		# create source copies for each implementation
		python_copy_sources
	fi

	_DISTUTILS_DEFAULT_CALLED=1
}

# @FUNCTION: distutils-r1_python_prepare
# @DESCRIPTION:
# The default python_prepare(). A no-op.
distutils-r1_python_prepare() {
	debug-print-function ${FUNCNAME} "${@}"

	[[ ${EAPI} == [45] ]] || die "${FUNCNAME} is banned in EAPI 6 (it was a no-op)"
}

# @FUNCTION: distutils-r1_python_configure
# @DESCRIPTION:
# The default python_configure(). A no-op.
distutils-r1_python_configure() {
	debug-print-function ${FUNCNAME} "${@}"

	[[ ${EAPI} == [45] ]] || die "${FUNCNAME} is banned in EAPI 6 (it was a no-op)"
}

# @FUNCTION: _distutils-r1_create_setup_cfg
# @INTERNAL
# @DESCRIPTION:
# Create implementation-specific configuration file for distutils,
# setting proper build-dir (and install-dir) paths.
_distutils-r1_create_setup_cfg() {
	cat > "${HOME}"/.pydistutils.cfg <<-_EOF_ || die
		[build]
		build-base = ${BUILD_DIR}

		# using a single directory for them helps us export
		# ${PYTHONPATH} and ebuilds find the sources independently
		# of whether the package installs extensions or not
		#
		# note: due to some packages (wxpython) relying on separate
		# platlib & purelib dirs, we do not set --build-lib (which
		# can not be overridden with --build-*lib)
		build-platlib = %(build-base)s/lib
		build-purelib = %(build-base)s/lib

		# make the ebuild writer lives easier
		build-scripts = %(build-base)s/scripts

		# this is needed by distutils_install_for_testing since
		# setuptools like to create .egg files for install --home.
		[bdist_egg]
		dist-dir = ${BUILD_DIR}/dist
	_EOF_

	# we can't refer to ${D} before src_install()
	if [[ ${EBUILD_PHASE} == install ]]; then
		cat >> "${HOME}"/.pydistutils.cfg <<-_EOF_ || die

			# installation paths -- allow calling extra install targets
			# without the default 'install'
			[install]
			compile = True
			optimize = 2
			root = ${D%/}
		_EOF_

		if [[ ! ${DISTUTILS_SINGLE_IMPL} ]]; then
			cat >> "${HOME}"/.pydistutils.cfg <<-_EOF_ || die
				install-scripts = $(python_get_scriptdir)
			_EOF_
		fi
	fi
}

# @FUNCTION: _distutils-r1_copy_egg_info
# @INTERNAL
# @DESCRIPTION:
# Copy egg-info files to the ${BUILD_DIR} (that's going to become
# egg-base in esetup.py). This way, we respect whatever's in upstream
# egg-info.
_distutils-r1_copy_egg_info() {
	mkdir -p "${BUILD_DIR}" || die
	# stupid freebsd can't do 'cp -t ${BUILD_DIR} {} +'
	find -name '*.egg-info' -type d -exec cp -R -p {} "${BUILD_DIR}"/ ';' || die
}

# @FUNCTION: distutils-r1_python_compile
# @USAGE: [additional-args...]
# @DESCRIPTION:
# The default python_compile(). Runs 'esetup.py build'. Any parameters
# passed to this function will be appended to setup.py invocation,
# i.e. passed as options to the 'build' command.
#
# This phase also sets up initial setup.cfg with build directories
# and copies upstream egg-info files if supplied.
distutils-r1_python_compile() {
	debug-print-function ${FUNCNAME} "${@}"

	_distutils-r1_copy_egg_info

	local build_args=()
	# distutils is parallel-capable since py3.5
	# to avoid breaking stable ebuilds, enable it only if either:
	# a. we're dealing with EAPI 7
	# b. we're dealing with Python 3.7 or PyPy3
	if python_is_python3 && [[ ${EPYTHON} != python3.4 ]]; then
		if [[ ${EAPI} != [56] || ${EPYTHON} != python3.[56] ]]; then
			local jobs=$(makeopts_jobs "${MAKEOPTS}" INF)
			if [[ ${jobs} == INF ]]; then
				local nproc=$(get_nproc)
				jobs=$(( nproc + 1 ))
			fi
			build_args+=( -j "${jobs}" )
		fi
	fi

	esetup.py build "${build_args[@]}" "${@}"
}

# @FUNCTION: _distutils-r1_wrap_scripts
# @USAGE: <path> <bindir>
# @INTERNAL
# @DESCRIPTION:
# Moves and wraps all installed scripts/executables as necessary.
_distutils-r1_wrap_scripts() {
	debug-print-function ${FUNCNAME} "${@}"

	[[ ${#} -eq 2 ]] || die "usage: ${FUNCNAME} <path> <bindir>"
	local path=${1}
	local bindir=${2}

	local scriptdir=$(python_get_scriptdir)
	local f python_files=() non_python_files=()

	if [[ -d ${path}${scriptdir} ]]; then
		for f in "${path}${scriptdir}"/*; do
			[[ -d ${f} ]] && die "Unexpected directory: ${f}"
			debug-print "${FUNCNAME}: found executable at ${f#${path}/}"

			local shebang
			read -r shebang < "${f}"
			if [[ ${shebang} == '#!'*${EPYTHON}* ]]; then
				debug-print "${FUNCNAME}: matching shebang: ${shebang}"
				python_files+=( "${f}" )
			else
				debug-print "${FUNCNAME}: non-matching shebang: ${shebang}"
				non_python_files+=( "${f}" )
			fi

			mkdir -p "${path}${bindir}" || die
		done

		for f in "${python_files[@]}"; do
			local basename=${f##*/}

			debug-print "${FUNCNAME}: installing wrapper at ${bindir}/${basename}"
			_python_ln_rel "${path}${EPREFIX}"/usr/lib/python-exec/python-exec2 \
				"${path}${bindir}/${basename}" || die
		done

		for f in "${non_python_files[@]}"; do
			local basename=${f##*/}

			debug-print "${FUNCNAME}: moving ${f#${path}/} to ${bindir}/${basename}"
			mv "${f}" "${path}${bindir}/${basename}" || die
		done
	fi
}

# @FUNCTION: distutils-r1_python_install
# @USAGE: [additional-args...]
# @DESCRIPTION:
# The default python_install(). Runs 'esetup.py install', doing
# intermediate root install and handling script wrapping afterwards.
# Any parameters passed to this function will be appended
# to the setup.py invocation (i.e. as options to the 'install' command).
#
# This phase updates the setup.cfg file with install directories.
distutils-r1_python_install() {
	debug-print-function ${FUNCNAME} "${@}"

	local args=( "${@}" )

	# enable compilation for the install phase.
	local -x PYTHONDONTWRITEBYTECODE=

	# python likes to compile any module it sees, which triggers sandbox
	# failures if some packages haven't compiled their modules yet.
	addpredict "${EPREFIX}/usr/lib/${EPYTHON}"
	addpredict "${EPREFIX}/usr/$(get_libdir)/${EPYTHON}"
	addpredict /usr/lib/pypy2.7
	addpredict /usr/lib/pypy3.6
	addpredict /usr/lib/portage/pym
	addpredict /usr/local # bug 498232

	if [[ ! ${DISTUTILS_SINGLE_IMPL} ]]; then
		# user may override --install-scripts
		# note: this is poor but distutils argv parsing is dumb
		local mydistutilsargs=( "${mydistutilsargs[@]}" )
		local scriptdir=${EPREFIX}/usr/bin

		# construct a list of mydistutilsargs[0] args[0] args[1]...
		local arg arg_vars
		[[ ${mydistutilsargs[@]} ]] && eval arg_vars+=(
			'mydistutilsargs['{0..$(( ${#mydistutilsargs[@]} - 1 ))}']'
		)
		[[ ${args[@]} ]] && eval arg_vars+=(
			'args['{0..$(( ${#args[@]} - 1 ))}']'
		)

		set -- "${arg_vars[@]}"
		while [[ ${@} ]]; do
			local arg_var=${1}
			shift
			local a=${!arg_var}

			case "${a}" in
				--install-scripts=*)
					scriptdir=${a#--install-scripts=}
					unset "${arg_var}"
					;;
				--install-scripts)
					scriptdir=${!1}
					unset "${arg_var}" "${1}"
					shift
					;;
			esac
		done
	fi

	local root=${D%/}/_${EPYTHON}
	[[ ${DISTUTILS_SINGLE_IMPL} ]] && root=${D%/}

	esetup.py install --skip-build --root="${root}" "${args[@]}"

	local forbidden_package_names=( examples test tests .pytest_cache )
	local p
	for p in "${forbidden_package_names[@]}"; do
		if [[ -d ${root}$(python_get_sitedir)/${p} ]]; then
			die "Package installs '${p}' package which is forbidden and likely a bug in the build system."
		fi
	done

	local shopt_save=$(shopt -p nullglob)
	shopt -s nullglob
	local pypy_dirs=(
		"${root}/usr/$(get_libdir)"/pypy*/share
		"${root}/usr/lib"/pypy*/share
	)
	${shopt_save}

	if [[ -n ${pypy_dirs} ]]; then
		die "Package installs 'share' in PyPy prefix, see bug #465546."
	fi

	if [[ ! ${DISTUTILS_SINGLE_IMPL} ]]; then
		_distutils-r1_wrap_scripts "${root}" "${scriptdir}"
		multibuild_merge_root "${root}" "${D%/}"
	fi
}

# @FUNCTION: distutils-r1_python_install_all
# @DESCRIPTION:
# The default python_install_all(). It installs the documentation.
distutils-r1_python_install_all() {
	debug-print-function ${FUNCNAME} "${@}"

	einstalldocs

	if declare -p EXAMPLES &>/dev/null; then
		[[ ${EAPI} != [45] ]] && die "EXAMPLES are banned in EAPI ${EAPI}"

		(
			docinto examples
			dodoc -r "${EXAMPLES[@]}"
		)
		docompress -x "/usr/share/doc/${PF}/examples"
	fi
}

# @FUNCTION: distutils-r1_run_phase
# @USAGE: [<argv>...]
# @INTERNAL
# @DESCRIPTION:
# Run the given command.
#
# If out-of-source builds are used, the phase function is run in source
# directory, with BUILD_DIR pointing at the build directory
# and PYTHONPATH having an entry for the module build directory.
#
# If in-source builds are used, the command is executed in the directory
# holding the per-implementation copy of sources. BUILD_DIR points
# to the 'build' subdirectory.
distutils-r1_run_phase() {
	debug-print-function ${FUNCNAME} "${@}"

	if [[ ${DISTUTILS_IN_SOURCE_BUILD} ]]; then
		# only force BUILD_DIR if implementation is explicitly enabled
		# for building; any-r1 API may select one that is not
		# https://bugs.gentoo.org/701506
		if [[ ! ${DISTUTILS_SINGLE_IMPL} ]] &&
				has "${EPYTHON/./_}" ${PYTHON_TARGETS}; then
			cd "${BUILD_DIR}" || die
		fi
		local BUILD_DIR=${BUILD_DIR}/build
	fi
	local -x PYTHONPATH="${BUILD_DIR}/lib:${PYTHONPATH}"

	# Bug 559644
	# using PYTHONPATH when the ${BUILD_DIR}/lib is not created yet might lead to
	# problems in setup.py scripts that try to import modules/packages from that path
	# during the build process (Python at startup evaluates PYTHONPATH, if the dir is
	# not valid then associates a NullImporter object to ${BUILD_DIR}/lib storing it
	# in the sys.path_importer_cache)
	mkdir -p "${BUILD_DIR}/lib" || die

	# Set up build environment, bug #513664.
	local -x AR=${AR} CC=${CC} CPP=${CPP} CXX=${CXX}
	tc-export AR CC CPP CXX

	# How to build Python modules in different worlds...
	local ldopts
	case "${CHOST}" in
		# provided by haubi, 2014-07-08
		*-aix*) ldopts='-shared -Wl,-berok';; # good enough
		# provided by grobian, 2014-06-22, bug #513664 c7
		*-darwin*) ldopts='-bundle -undefined dynamic_lookup';;
		*) ldopts='-shared';;
	esac

	local -x LDSHARED="${CC} ${ldopts}" LDCXXSHARED="${CXX} ${ldopts}"

	"${@}"

	cd "${_DISTUTILS_INITIAL_CWD}" || die
}

# @FUNCTION: _distutils-r1_run_common_phase
# @USAGE: [<argv>...]
# @INTERNAL
# @DESCRIPTION:
# Run the given command, restoring the state for a most preferred Python
# implementation matching DISTUTILS_ALL_SUBPHASE_IMPLS.
#
# If in-source build is used, the command will be run in the copy
# of sources made for the selected Python interpreter.
_distutils-r1_run_common_phase() {
	local DISTUTILS_ORIG_BUILD_DIR=${BUILD_DIR}

	if [[ ${DISTUTILS_SINGLE_IMPL} ]]; then
		# reuse the dedicated code branch
		_distutils-r1_run_foreach_impl "${@}"
	else
		local -x EPYTHON PYTHON
		local -x PATH=${PATH} PKG_CONFIG_PATH=${PKG_CONFIG_PATH}
		python_setup "${DISTUTILS_ALL_SUBPHASE_IMPLS[@]}"

		local MULTIBUILD_VARIANTS=( "${EPYTHON/./_}" )
		# store for restoring after distutils-r1_run_phase.
		local _DISTUTILS_INITIAL_CWD=${PWD}
		multibuild_foreach_variant \
			distutils-r1_run_phase "${@}"
	fi
}

# @FUNCTION: _distutils-r1_run_foreach_impl
# @INTERNAL
# @DESCRIPTION:
# Run the given phase for each implementation if multiple implementations
# are enabled, once otherwise.
_distutils-r1_run_foreach_impl() {
	debug-print-function ${FUNCNAME} "${@}"

	# store for restoring after distutils-r1_run_phase.
	local _DISTUTILS_INITIAL_CWD=${PWD}
	set -- distutils-r1_run_phase "${@}"

	if [[ ! ${DISTUTILS_SINGLE_IMPL} ]]; then
		python_foreach_impl "${@}"
	else
		if [[ ! ${EPYTHON} ]]; then
			die "EPYTHON unset, python-single-r1_pkg_setup not called?!"
		fi
		local BUILD_DIR=${BUILD_DIR:-${S}}
		BUILD_DIR=${BUILD_DIR%%/}_${EPYTHON}

		"${@}"
	fi
}

distutils-r1_src_prepare() {
	debug-print-function ${FUNCNAME} "${@}"

	local _DISTUTILS_DEFAULT_CALLED

	# common preparations
	if declare -f python_prepare_all >/dev/null; then
		python_prepare_all
	else
		distutils-r1_python_prepare_all
	fi

	if [[ ! ${_DISTUTILS_DEFAULT_CALLED} ]]; then
		local cmd=die
		[[ ${EAPI} == [45] ]] && cmd=eqawarn

		"${cmd}" "QA: python_prepare_all() didn't call distutils-r1_python_prepare_all"
	fi

	if declare -f python_prepare >/dev/null; then
		_distutils-r1_run_foreach_impl python_prepare
	fi
}

distutils-r1_src_configure() {
	python_export_utf8_locale
	[[ ${EAPI} == [56] ]] && xdg_environment_reset # Bug 577704

	if declare -f python_configure >/dev/null; then
		_distutils-r1_run_foreach_impl python_configure
	fi

	if declare -f python_configure_all >/dev/null; then
		_distutils-r1_run_common_phase python_configure_all
	fi
}

distutils-r1_src_compile() {
	debug-print-function ${FUNCNAME} "${@}"

	if declare -f python_compile >/dev/null; then
		_distutils-r1_run_foreach_impl python_compile
	else
		_distutils-r1_run_foreach_impl distutils-r1_python_compile
	fi

	if declare -f python_compile_all >/dev/null; then
		_distutils-r1_run_common_phase python_compile_all
	fi
}

# @FUNCTION: _distutils-r1_clean_egg_info
# @INTERNAL
# @DESCRIPTION:
# Clean up potential stray egg-info files left by setuptools test phase.
# Those files ended up being unversioned, and caused issues:
# https://bugs.gentoo.org/534058
_distutils-r1_clean_egg_info() {
	rm -rf "${BUILD_DIR}"/lib/*.egg-info || die
}

distutils-r1_src_test() {
	debug-print-function ${FUNCNAME} "${@}"

	if declare -f python_test >/dev/null; then
		_distutils-r1_run_foreach_impl python_test
		_distutils-r1_run_foreach_impl _distutils-r1_clean_egg_info
	fi

	if declare -f python_test_all >/dev/null; then
		_distutils-r1_run_common_phase python_test_all
	fi
}

# @FUNCTION: _distutils-r1_check_namespace_pth
# @INTERNAL
# @DESCRIPTION:
# Check if any *-nspkg.pth files were installed (by setuptools)
# and warn about the policy non-conformance if they were.
_distutils-r1_check_namespace_pth() {
	local f pth=()

	while IFS= read -r -d '' f; do
		pth+=( "${f}" )
	done < <(find "${ED%/}" -name '*-nspkg.pth' -print0)

	if [[ ${pth[@]} ]]; then
		ewarn "The following *-nspkg.pth files were found installed:"
		ewarn
		for f in "${pth[@]}"; do
			ewarn "  ${f#${ED%/}}"
		done
		ewarn
		ewarn "The presence of those files may break namespaces in Python 3.5+. Please"
		ewarn "read our documentation on reliable handling of namespaces and update"
		ewarn "the ebuild accordingly:"
		ewarn
		ewarn "  https://wiki.gentoo.org/wiki/Project:Python/Namespace_packages"
	fi
}

distutils-r1_src_install() {
	debug-print-function ${FUNCNAME} "${@}"

	if declare -f python_install >/dev/null; then
		_distutils-r1_run_foreach_impl python_install
	else
		_distutils-r1_run_foreach_impl distutils-r1_python_install
	fi

	if declare -f python_install_all >/dev/null; then
		_distutils-r1_run_common_phase python_install_all
	else
		_distutils-r1_run_common_phase distutils-r1_python_install_all
	fi

	_distutils-r1_check_namespace_pth
}

# -- distutils.eclass functions --

distutils_get_intermediate_installation_image() {
	die "${FUNCNAME}() is invalid for distutils-r1"
}

distutils_src_unpack() {
	die "${FUNCNAME}() is invalid for distutils-r1, and you don't want it in EAPI ${EAPI} anyway"
}

distutils_src_prepare() {
	die "${FUNCNAME}() is invalid for distutils-r1, you probably want: ${FUNCNAME/_/-r1_}"
}

distutils_src_compile() {
	die "${FUNCNAME}() is invalid for distutils-r1, you probably want: ${FUNCNAME/_/-r1_}"
}

distutils_src_test() {
	die "${FUNCNAME}() is invalid for distutils-r1, you probably want: ${FUNCNAME/_/-r1_}"
}

distutils_src_install() {
	die "${FUNCNAME}() is invalid for distutils-r1, you probably want: ${FUNCNAME/_/-r1_}"
}

distutils_pkg_postinst() {
	die "${FUNCNAME}() is invalid for distutils-r1, and pkg_postinst is unnecessary"
}

distutils_pkg_postrm() {
	die "${FUNCNAME}() is invalid for distutils-r1, and pkg_postrm is unnecessary"
}

_DISTUTILS_R1=1
fi