summaryrefslogtreecommitdiff
path: root/eclass/ghc-package.eclass
blob: 27fafff5a21b2f27875dec073803d054f3df180c (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
# Copyright 1999-2018 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

# @ECLASS: ghc-package.eclass
# @MAINTAINER:
# "Gentoo's Haskell Language team" <haskell@gentoo.org>
# @AUTHOR:
# Original Author: Andres Loeh <kosmikus@gentoo.org>
# @BLURB: This eclass helps with the Glasgow Haskell Compiler's package configuration utility.
# @DESCRIPTION:
# Helper eclass to handle ghc installation/upgrade/deinstallation process.

inherit multiprocessing

# Maintain version-testing compatibility with ebuilds not using EAPI 7.
case "${EAPI:-0}" in
	4|5|6) inherit eapi7-ver ;;
	*) ;;
esac

# @FUNCTION: ghc-getghc
# @DESCRIPTION:
# returns the name of the ghc executable
ghc-getghc() {
	type -P ${HC:-ghc}
}

# @FUNCTION: ghc-getghcpkg
# @DESCRIPTION:
# Internal function determines returns the name of the ghc-pkg executable
ghc-getghcpkg() {
	type -P ${HC_PKG:-ghc-pkg}
}

# @FUNCTION: ghc-getghcpkgbin
# @DESCRIPTION:
# returns the name of the ghc-pkg binary (ghc-pkg
# itself usually is a shell script, and we have to
# bypass the script under certain circumstances);
# for Cabal, we add an empty global package config file,
# because for some reason the global package file
# must be specified
ghc-getghcpkgbin() {
	if ver_test "$(ghc-version)" -ge "7.9.20141222"; then
		# ghc-7.10 stopped supporting single-file database
		local empty_db="${T}/empty.conf.d" ghc_pkg="$(ghc-libdir)/bin/ghc-pkg"
		if [[ ! -d ${empty_db} ]]; then
			"${ghc_pkg}" init "${empty_db}" || die "Failed to initialize empty global db"
		fi
		echo "$(ghc-libdir)/bin/ghc-pkg" "--global-package-db=${empty_db}"

	elif ver_test "$(ghc-version)" -ge "7.7.20121101"; then
		# the ghc-pkg executable changed name in ghc 6.10, as it no longer needs
		# the wrapper script with the static flags
		# was moved to bin/ subtree by:
		# http://www.haskell.org/pipermail/cvs-ghc/2012-September/076546.html
		echo '[]' > "${T}/empty.conf"
		echo "$(ghc-libdir)/bin/ghc-pkg" "--global-package-db=${T}/empty.conf"

	elif ver_test "$(ghc-version)" -ge "7.5.20120516"; then
		echo '[]' > "${T}/empty.conf"
		echo "$(ghc-libdir)/ghc-pkg" "--global-package-db=${T}/empty.conf"

	else
		echo '[]' > "${T}/empty.conf"
		echo "$(ghc-libdir)/ghc-pkg" "--global-conf=${T}/empty.conf"
	fi
}

# @FUNCTION: ghc-version
# @DESCRIPTION:
# returns upstream version of ghc
# as reported by '--numeric-version'
# Examples: "7.10.2", "7.9.20141222"
_GHC_VERSION_CACHE=""
ghc-version() {
	if [[ -z "${_GHC_VERSION_CACHE}" ]]; then
		_GHC_VERSION_CACHE="$($(ghc-getghc) --numeric-version)"
	fi
	echo "${_GHC_VERSION_CACHE}"
}

# @FUNCTION: ghc-pm-version
# @DESCRIPTION:
# returns package manager(PM) version of ghc
# as reported by '$(best_version)'
# Examples: "PM:7.10.2", "PM:7.10.2_rc1", "PM:7.8.4-r4"
_GHC_PM_VERSION_CACHE=""
ghc-pm-version() {
	local pm_ghc_p

	if [[ -z "${_GHC_PM_VERSION_CACHE}" ]]; then
		pm_ghc_p=$(best_version dev-lang/ghc)
		_GHC_PM_VERSION_CACHE="PM:${pm_ghc_p#dev-lang/ghc-}"
	fi
	echo "${_GHC_PM_VERSION_CACHE}"
}

# @FUNCTION: ghc-cabal-version
# @DESCRIPTION:
# return version of the Cabal library bundled with ghc
ghc-cabal-version() {
	if ver_test "$(ghc-version)" -ge "7.9.20141222"; then
		# outputs in format: 'version: 1.18.1.5'
		set -- `$(ghc-getghcpkg) --package-db=$(ghc-libdir)/package.conf.d.initial field Cabal version`
		echo "$2"
	else
		local cabal_package=`echo "$(ghc-libdir)"/Cabal-*`
		# /path/to/ghc/Cabal-${VER} -> ${VER}
		echo "${cabal_package/*Cabal-/}"
	fi
}

# @FUNCTION: ghc-is-dynamic
# @DESCRIPTION:
# checks if ghc is built against dynamic libraries
# binaries linked against GHC library (and using plugin loading)
# have to be linked the same way:
#    https://ghc.haskell.org/trac/ghc/ticket/10301
ghc-is-dynamic() {
	$(ghc-getghc) --info | grep "GHC Dynamic" | grep -q "YES"
}

# @FUNCTION: ghc-supports-shared-libraries
# @DESCRIPTION:
# checks if ghc is built with support for building
# shared libraries (aka '-dynamic' option)
ghc-supports-shared-libraries() {
	$(ghc-getghc) --info | grep "RTS ways" | grep -q "dyn"
}

# @FUNCTION: ghc-supports-threaded-runtime
# @DESCRIPTION:
# checks if ghc is built with support for threaded
# runtime (aka '-threaded' option)
ghc-supports-threaded-runtime() {
	$(ghc-getghc) --info | grep "RTS ways" | grep -q "thr"
}

# @FUNCTION: ghc-supports-smp
# @DESCRIPTION:
# checks if ghc is built with support for multiple cores runtime
ghc-supports-smp() {
	$(ghc-getghc) --info | grep "Support SMP" | grep -q "YES"
}

# @FUNCTION: ghc-supports-interpreter
# @DESCRIPTION:
# checks if ghc has interpreter mode (aka GHCi)
# It usually means that ghc supports for template haskell.
ghc-supports-interpreter() {
	$(ghc-getghc) --info | grep "Have interpreter" | grep -q "YES"
}

# @FUNCTION: ghc-supports-parallel-make
# @DESCRIPTION:
# checks if ghc has support for '--make -j' mode
# The option was introduced in ghc-7.8-rc1.
ghc-supports-parallel-make() {
	$(ghc-getghc) --info | grep "Support parallel --make" | grep -q "YES"
}

# @FUNCTION: ghc-extractportageversion
# @DESCRIPTION:
# extract the version of a portage-installed package
ghc-extractportageversion() {
	local pkg
	local version
	pkg="$(best_version $1)"
	version="${pkg#$1-}"
	version="${version%-r*}"
	version="${version%_pre*}"
	echo "${version}"
}

# @FUNCTION: ghc-libdir
# @DESCRIPTION:
# returns the library directory
_GHC_LIBDIR_CACHE=""
ghc-libdir() {
	if [[ -z "${_GHC_LIBDIR_CACHE}" ]]; then
		_GHC_LIBDIR_CACHE="$($(ghc-getghc) --print-libdir)"
	fi
	echo "${_GHC_LIBDIR_CACHE}"
}

# @FUNCTION: ghc-make-args
# @DESCRIPTION:
# Returns default arguments passed along 'ghc --make'
# build mode. Used mainly to enable parallel build mode.
ghc-make-args() {
	local ghc_make_args=()
	# parallel on all available cores
	if ghc-supports-smp && ghc-supports-parallel-make; then
		# It should have been just -j$(makeopts_jobs)
		# but GHC does not yet have nice defaults:
		#    https://ghc.haskell.org/trac/ghc/ticket/9221#comment:57
		# SMP is a requirement for parallel GC's gen0
		# 'qb' balancing.
		echo "-j$(makeopts_jobs) +RTS -A256M -qb0 -RTS"
		ghc_make_args=()
	fi
	echo "${ghc_make_args[@]}"
}

# @FUNCTION: ghc-confdir
# @DESCRIPTION:
# returns the (Gentoo) library configuration directory, we
# store here a hint for 'haskell-updater' about packages
# installed for old ghc versions and current ones.
ghc-confdir() {
	echo "$(ghc-libdir)/gentoo"
}

# @FUNCTION: ghc-package-db
# @DESCRIPTION:
# returns the global package database directory
ghc-package-db() {
	echo "$(ghc-libdir)/package.conf.d"
}

# @FUNCTION: ghc-localpkgconfd
# @DESCRIPTION:
# returns the name of the local (package-specific)
# package configuration file
ghc-localpkgconfd() {
	echo "${PF}.conf.d"
}

# @FUNCTION: ghc-package-exists
# @DESCRIPTION:
# tests if a ghc package exists
ghc-package-exists() {
	$(ghc-getghcpkg) describe "$1" > /dev/null 2>&1
}

# @FUNCTION: check-for-collisions
# @DESCRIPTION:
# makes sure no packages
# have the same version as initial package setup
check-for-collisions() {
	local localpkgconf=$1
	local checked_pkg
	local initial_pkg_db="$(ghc-libdir)/package.conf.d.initial"

	for checked_pkg in `$(ghc-getghcpkgbin) -f "${localpkgconf}" list --simple-output`
	do
		# should return empty output
		local collided=`$(ghc-getghcpkgbin) -f ${initial_pkg_db} list --simple-output "${checked_pkg}"`

		if [[ -n ${collided} ]]; then
			eerror "Cabal package '${checked_pkg}' is shipped with '$(ghc-pm-version)' ('$(ghc-version)')."
			eerror "Ebuild author forgot an entry in CABAL_CORE_LIB_GHC_PV='${CABAL_CORE_LIB_GHC_PV}'."
			eerror "Found in ${initial_pkg_db}."
			die
		fi
	done
}

# @FUNCTION: ghc-install-pkg
# @DESCRIPTION:
# moves the local (package-specific) package configuration
# file to its final destination
ghc-install-pkg() {
	local localpkgconf="${T}/$(ghc-localpkgconfd)"
	local pkg_path pkg pkg_db="${D}/$(ghc-package-db)" hint_db="${D}/$(ghc-confdir)"

	$(ghc-getghcpkgbin) init "${localpkgconf}" || die "Failed to initialize empty local db"
	for pkg_config_file in "$@"; do
		$(ghc-getghcpkgbin) -f "${localpkgconf}" update - --force \
				< "${pkg_config_file}" || die "failed to register ${pkg}"
	done

	check-for-collisions "${localpkgconf}"

	mkdir -p "${pkg_db}" || die
	for pkg_path in "${localpkgconf}"/*.conf; do
		pkg=$(basename "${pkg_path}")
		cp "${pkg_path}" "${pkg_db}/${pkg}" || die
	done

	mkdir -p "${hint_db}" || die
	for pkg_config_file in "$@"; do
		local pkg_name="gentoo-${CATEGORY}-${PF}-"$(basename "${pkg_config_file}")
		cp "${pkg_config_file}" "${hint_db}/${pkg_name}" || die
		chmod 0644 "${hint_db}/${pkg_name}" || die
	done
}

# @FUNCTION: ghc-recache-db
# @DESCRIPTION:
# updates 'package.cache' binary cacne for registered '*.conf'
# packages
ghc-recache-db() {
	einfo "Recaching GHC package DB"
	$(ghc-getghcpkg) recache
}

# @FUNCTION: ghc-register-pkg
# @DESCRIPTION:
# registers all packages in the local (package-specific)
# package configuration file
ghc-register-pkg() {
	ghc-recache-db
}

# @FUNCTION: ghc-reregister
# @DESCRIPTION:
# re-adds all available .conf files to the global
# package conf file, to be used on a ghc reinstallation
ghc-reregister() {
	ghc-recache-db
}

# @FUNCTION: ghc-unregister-pkg
# @DESCRIPTION:
# unregisters a package configuration file
ghc-unregister-pkg() {
	ghc-recache-db
}

# @FUNCTION: ghc-pkgdeps
# @DESCRIPTION:
# exported function: loads a package dependency in a form
# cabal_package version
ghc-pkgdeps() {
	echo $($(ghc-getghcpkg) describe "${1}") \
	| sed \
			-e '/depends/,/^.*:/ !d' \
			-e 's/\(.*\)-\(.*\)-\(.*\)/\1 \2/' \
			-e 's/^.*://g'
}

# @FUNCTION: ghc-package_pkg_postinst
# @DESCRIPTION:
# updates package.cache after package install
ghc-package_pkg_postinst() {
	ghc-recache-db
}

# @FUNCTION: ghc-package_pkg_prerm
# @DESCRIPTION:
# updates package.cache after package deinstall
ghc-package_pkg_prerm() {
	ewarn "ghc-package.eclass: 'ghc-package_pkg_prerm()' is a noop"
	ewarn "ghc-package.eclass: consider 'haskell-cabal_pkg_postrm()' instead"
}

# @FUNCTION: ghc-package_pkg_postrm
# @DESCRIPTION:
# updates package.cache after package deinstall
ghc-package_pkg_postrm() {
	ghc-recache-db
}