summaryrefslogtreecommitdiff
blob: 151ca89b6de49d0d95d71c81c5ca4ad5487978ac (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
# Copyright 1999-2006 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/haskell-cabal.eclass,v 1.16 2009/09/09 18:40:11 kolmodin Exp $
#
# Original authors: Andres Loeh <kosmikus@gentoo.org>
#                   Duncan Coutts <dcoutts@gentoo.org>
# Maintained by: Haskell herd <haskell@gentoo.org>
#
# This eclass is for packages that make use of the
# Haskell Common Architecture for Building Applications
# and Libraries (cabal).
#
# Basic instructions:
#
# Before inheriting the eclass, set CABAL_FEATURES to
# reflect the tools and features that the package makes
# use of.
#
# Currently supported features:
#   haddock    --  for documentation generation
#   alex       --  lexer/scanner generator
#   happy      --  parser generator
#   c2hs       --  C interface generator
#   cpphs      --  C preprocessor clone written in Haskell
#   profile    --  if package supports to build profiling-enabled libraries
#   bootstrap  --  only used for the cabal package itself
#   bin        --  the package installs binaries
#   lib        --  the package installs libraries
#   nocabaldep --  don't add dependency on cabal.
#					only used for packages that _must_ not pull the dependency
#					on cabal, but still use this eclass (e.g. haskell-updater).
#
# Dependencies on other cabal packages have to be specified
# correctly.
#
# Cabal libraries should usually be SLOTted with "${PV}".
#
# Many Cabal packages require S to be manually set.
#
# Conforming Cabal packages don't require any function definitions
# in the ebuild.
#
# Special flags to Cabal Configure can now be set by using
# CABAL_CONFIGURE_FLAGS

inherit ghc-package multilib


for feature in ${CABAL_FEATURES}; do
	case ${feature} in
		haddock)    CABAL_USE_HADDOCK=yes;;
		alex)       CABAL_USE_ALEX=yes;;
		happy)      CABAL_USE_HAPPY=yes;;
		c2hs)       CABAL_USE_C2HS=yes;;
		cpphs)      CABAL_USE_CPPHS=yes;;
		profile)    CABAL_USE_PROFILE=yes;;
		bootstrap)  CABAL_BOOTSTRAP=yes;;
		bin)        CABAL_HAS_BINARIES=yes;;
		lib)        CABAL_HAS_LIBRARIES=yes;;
		nocabaldep) CABAL_FROM_GHC=yes;;
		*) CABAL_UNKNOWN="${CABAL_UNKNOWN} ${feature}";;
	esac
done

if [[ -n "${CABAL_USE_HADDOCK}" ]]; then
	IUSE="${IUSE} doc"
	DEPEND="${DEPEND} doc? ( dev-haskell/haddock )"
fi

if [[ -n "${CABAL_USE_ALEX}" ]]; then
	DEPEND="${DEPEND} dev-haskell/alex"
	cabalconf="${cabalconf} --with-alex=/usr/bin/alex"
fi

if [[ -n "${CABAL_USE_HAPPY}" ]]; then
	DEPEND="${DEPEND} dev-haskell/happy"
	cabalconf="${cabalconf} --with-happy=/usr/bin/happy"
fi

if [[ -n "${CABAL_USE_C2HS}" ]]; then
	DEPEND="${DEPEND} dev-haskell/c2hs"
	cabalconf="${cabalconf} --with-c2hs=/usr/bin/c2hs"
fi

if [[ -n "${CABAL_USE_CPPHS}" ]]; then
	DEPEND="${DEPEND} dev-haskell/cpphs"
	cabalconf="${cabalconf} --with-cpphs=/usr/bin/cpphs"
fi

if [[ -n "${CABAL_USE_PROFILE}" ]]; then
	IUSE="${IUSE} profile"
fi

# We always use a standalone version of Cabal, rather than the one that comes
# with GHC. But of course we can't depend on cabal when building cabal itself.
if [[ -z ${CABAL_MIN_VERSION} ]]; then
	CABAL_MIN_VERSION=1.1.4
fi
if [[ -z "${CABAL_BOOTSTRAP}" && -z "${CABAL_FROM_GHC}" ]]; then
	DEPEND="${DEPEND} >=dev-haskell/cabal-${CABAL_MIN_VERSION}"
fi

# Libraries require GHC to be installed.
if [[ -n "${CABAL_HAS_LIBRARIES}" ]]; then
	RDEPEND="${RDEPEND} dev-lang/ghc"
fi

# returns the version of cabal currently in use
_CABAL_VERSION_CACHE=""
cabal-version() {
	if [[ -z "${_CABAL_VERSION_CACHE}" ]]; then
		if [[ "${CABAL_BOOTSTRAP}" ]]; then
			# We're bootstrapping cabal, so the cabal version is the version
			# of this package itself.
			_CABAL_VERSION_CACHE="${PV}"
		else
			# We ask portage, not ghc, so that we only pick up
			# portage-installed cabal versions.
			_CABAL_VERSION_CACHE="$(ghc-extractportageversion dev-haskell/cabal)"
		fi
	fi
	echo "${_CABAL_VERSION_CACHE}"
}

cabal-bootstrap() {
	local setupmodule
	local cabalpackage
	if [[ -f "${S}/Setup.lhs" ]]; then
		setupmodule="${S}/Setup.lhs"
	else
		if [[ -f "${S}/Setup.hs" ]]; then
			setupmodule="${S}/Setup.hs"
		else
			die "No Setup.lhs or Setup.hs found"
		fi
	fi

	# We build the setup program using the latest version of
	# cabal that we have installed
	if version_is_at_least "6.4" "$(ghc-version)"; then
		cabalpackage=Cabal-$(cabal-version)
	else
		# older ghc's don't support package versioning
		cabalpackage=Cabal
	fi
	einfo "Using cabal-$(cabal-version)."
	$(ghc-getghc) -package "${cabalpackage}" --make "${setupmodule}" -o setup \
		|| die "compiling ${setupmodule} failed"
}

cabal-mksetup() {
	local setupdir

	if [[ -n $1 ]]; then
		setupdir=$1
	else
		setupdir=${S}
	fi

	rm -f "${setupdir}"/Setup.{lhs,hs}

	echo 'import Distribution.Simple; main = defaultMainWithHooks defaultUserHooks' \
		> $setupdir/Setup.hs
}

cabal-haddock() {
	./setup haddock || die "setup haddock failed"
}

cabal-configure() {
	if [[ -n "${CABAL_USE_HADDOCK}" ]] && use doc; then
		cabalconf="${cabalconf} --with-haddock=/usr/bin/haddock"
	fi
	if [[ -n "${CABAL_USE_PROFILE}" ]] && use profile; then
		cabalconf="${cabalconf} --enable-library-profiling"
	fi
	# Building GHCi libs on ppc64 causes "TOC overflow".
	if use ppc64; then
		cabalconf="${cabalconf} --disable-library-for-ghci"
	fi

	if version_is_at_least "1.2.0" "$(cabal-version)"; then
		cabalconf="${cabalconf} --docdir=/usr/share/doc/${PF}"
		# As of Cabal 1.2, configure is quite quiet. For diagnostic purposes
		# it's better if the configure chatter is in the build logs:
		cabalconf="${cabalconf} --verbose"
	fi
	# Note: with Cabal-1.1.6.x we do not have enough control
	# to put the docs into the right place. They're currently going
	# into			/usr/share/${P}/ghc-x.y/doc/
	# rather than	/usr/share/doc/${PF}/
	# Because we can only set the datadir, not the docdir.

	./setup configure \
		--ghc --prefix=/usr \
		--with-compiler="$(ghc-getghc)" \
		--with-hc-pkg="$(ghc-getghcpkg)" \
		--prefix=/usr \
		--libdir=/usr/$(get_libdir) \
		--libsubdir=${P}/ghc-$(ghc-version) \
		--datadir=/usr/share/ \
		--datasubdir=${P}/ghc-$(ghc-version) \
		${cabalconf} \
		${CABAL_CONFIGURE_FLAGS} \
		"$@" || die "setup configure failed"
}

cabal-build() {
	unset LANG LC_ALL LC_MESSAGES
	./setup build \
		|| die "setup build failed"
}

cabal-copy() {
	./setup copy \
		--destdir="${D}" \
		|| die "setup copy failed"

	# cabal is a bit eager about creating dirs,
	# so remove them if they are empty
	rmdir "${D}/usr/bin" 2> /dev/null

	# GHC 6.4 has a bug in get/setPermission and Cabal 1.1.1 has
	# no workaround.
	# set the +x permission on executables
	if [[ -d "${D}/usr/bin" ]] ; then
		chmod +x "${D}/usr/bin/"*
	fi
	# TODO: do we still need this?
}

cabal-pkg() {
	# This does not actually register since we're using true instead
	# of ghc-pkg. So it just leaves the .installed-pkg-config and we can
	# register that ourselves (if it exists).
	local result
	local err

	if [[ -n ${CABAL_HAS_LIBRARIES} ]]; then
		if version_is_at_least "1.2.0" "$(cabal-version)"; then
			# Newer cabal can generate a package conf for us:
			./setup register --gen-pkg-config="${T}/${P}.conf"
			ghc-setup-pkg "${T}/${P}.conf"
			ghc-install-pkg
		else
			# With older cabal we have to hack it by replacing its ghc-pkg
			# with true and then just picking up the .installed-pkg-config
			# file and registering that ourselves (if it exists).
			sed -i "s|$(ghc-getghcpkg)|$(type -P true)|" .setup-config
			./setup register || die "setup register failed"
			if [[ -f .installed-pkg-config ]]; then
				ghc-setup-pkg .installed-pkg-config
				ghc-install-pkg
			else
				die "setup register has not generated a package configuration file"
			fi
		fi
	fi
}

# Some cabal libs are bundled along with some versions of ghc
# eg filepath-1.0 comes with ghc-6.6.1
# by putting CABAL_CORE_LIB_GHC_PV="6.6.1" in an ebuild we are declaring that
# when building with this version of ghc, the ebuild is a dummy that is it will
# install no files since the package is already included with ghc.
# However portage still records the dependency and we can upgrade the package
# to a later one that's not included with ghc.
# You can also put a space separated list, eg CABAL_CORE_LIB_GHC_PV="6.6 6.6.1".
cabal-is-dummy-lib() {
	for version in ${CABAL_CORE_LIB_GHC_PV[*]}; do
		[[ "$(ghc-version)" == "$version" ]] && return 0
	done
	return 1
}

# exported function: check if cabal is correctly installed for
# the currently active ghc (we cannot guarantee this with portage)
haskell-cabal_pkg_setup() {
	ghc-package_pkg_setup
	if [[ -z "${CABAL_BOOTSTRAP}" && -z "${CABAL_FROM_GHC}" ]] && ! ghc-sanecabal "${CABAL_MIN_VERSION}"; then
		eerror "The package dev-haskell/cabal is not correctly installed for"
		eerror "the currently active version of ghc ($(ghc-version)). Please"
		eerror "run ghc-updater or haskell-updater or re-build dev-haskell/cabal."
		die "cabal is not correctly installed"
	fi
	if [[ -z "${CABAL_HAS_BINARIES}" ]] && [[ -z "${CABAL_HAS_LIBRARIES}" ]]; then
		eerror "QA: Neither bin nor lib are in CABAL_FEATURES."
	fi
	if [[ -n "${CABAL_UNKNOWN}" ]]; then
		ewarn "Unknown entry in CABAL_FEATURES: ${CABAL_UNKNOWN}"
	fi
	if cabal-is-dummy-lib; then
		einfo "${P} is included in ghc-${CABAL_CORE_LIB_GHC_PV}, nothing to install."
	fi
}

# exported function: cabal-style bootstrap configure and compile
cabal_src_compile() {
	if ! cabal-is-dummy-lib; then
		cabal-bootstrap
		cabal-configure
		cabal-build

		if [[ -n "${CABAL_USE_HADDOCK}" ]] && use doc; then
			cabal-haddock
		fi
	fi
}

haskell-cabal_src_compile() {
	cabal_src_compile
}

# exported function: cabal-style copy and register
cabal_src_install() {
	if cabal-is-dummy-lib; then
		# create a dummy local package conf file for the sake of ghc-updater
		dodir "$(ghc-confdir)"
		echo '[]' > "${D}/$(ghc-confdir)/$(ghc-localpkgconf)"
	else
		cabal-copy
		cabal-pkg

		if [[ -n "${CABAL_USE_HADDOCK}" ]] && use doc; then
			if ! version_is_at_least "1.1.6" "$(cabal-version)"; then
				dohtml -r dist/doc/html/*
			fi
		fi
	fi
}
haskell-cabal_src_install() {
	cabal_src_install
}

EXPORT_FUNCTIONS pkg_setup src_compile src_install