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1# Copyright 1999-2012 Gentoo Foundation 1# Copyright 1999-2014 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/haskell-cabal.eclass,v 1.32 2012/04/19 17:33:19 slyfox Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/haskell-cabal.eclass,v 1.46 2014/06/27 07:26:18 slyfox Exp $
4 4
5# @ECLASS: haskell-cabal.eclass 5# @ECLASS: haskell-cabal.eclass
6# @MAINTAINER: 6# @MAINTAINER:
7# Haskell herd <haskell@gentoo.org> 7# Haskell herd <haskell@gentoo.org>
8# @AUTHOR: 8# @AUTHOR:
17# use of. 17# use of.
18# 18#
19# Currently supported features: 19# Currently supported features:
20# haddock -- for documentation generation 20# haddock -- for documentation generation
21# hscolour -- generation of colourised sources 21# hscolour -- generation of colourised sources
22# hoogle -- generation of documentation search index
22# alex -- lexer/scanner generator 23# alex -- lexer/scanner generator
23# happy -- parser generator 24# happy -- parser generator
24# c2hs -- C interface generator 25# c2hs -- C interface generator
25# cpphs -- C preprocessor clone written in Haskell 26# cpphs -- C preprocessor clone written in Haskell
26# profile -- if package supports to build profiling-enabled libraries 27# profile -- if package supports to build profiling-enabled libraries
30# nocabaldep -- don't add dependency on cabal. 31# nocabaldep -- don't add dependency on cabal.
31# only used for packages that _must_ not pull the dependency 32# only used for packages that _must_ not pull the dependency
32# on cabal, but still use this eclass (e.g. haskell-updater). 33# on cabal, but still use this eclass (e.g. haskell-updater).
33# test-suite -- add support for cabal test-suites (introduced in Cabal-1.8) 34# test-suite -- add support for cabal test-suites (introduced in Cabal-1.8)
34 35
35inherit ghc-package multilib 36inherit eutils ghc-package multilib multiprocessing
36 37
37# @ECLASS-VARIABLE: CABAL_EXTRA_CONFIGURE_FLAGS 38# @ECLASS-VARIABLE: CABAL_EXTRA_CONFIGURE_FLAGS
38# @DESCRIPTION: 39# @DESCRIPTION:
39# User-specified additional parameters passed to 'setup configure'. 40# User-specified additional parameters passed to 'setup configure'.
40# example: /etc/make.conf: CABAL_EXTRA_CONFIGURE_FLAGS=--enable-shared 41# example: /etc/portage/make.conf: CABAL_EXTRA_CONFIGURE_FLAGS=--enable-shared
41: ${CABAL_EXTRA_CONFIGURE_FLAGS:=} 42: ${CABAL_EXTRA_CONFIGURE_FLAGS:=}
42 43
43# @ECLASS-VARIABLE: CABAL_EXTRA_BUILD_FLAGS 44# @ECLASS-VARIABLE: CABAL_EXTRA_BUILD_FLAGS
44# @DESCRIPTION: 45# @DESCRIPTION:
45# User-specified additional parameters passed to 'setup build'. 46# User-specified additional parameters passed to 'setup build'.
46# example: /etc/make.conf: CABAL_EXTRA_BUILD_FLAGS=-v 47# example: /etc/portage/make.conf: CABAL_EXTRA_BUILD_FLAGS=-v
47: ${CABAL_EXTRA_BUILD_FLAGS:=} 48: ${CABAL_EXTRA_BUILD_FLAGS:=}
48 49
49# @ECLASS-VARIABLE: GHC_BOOTSTRAP_FLAGS 50# @ECLASS-VARIABLE: GHC_BOOTSTRAP_FLAGS
50# @DESCRIPTION: 51# @DESCRIPTION:
51# User-specified additional parameters for ghc when building 52# User-specified additional parameters for ghc when building
52# _only_ 'setup' binary bootstrap. 53# _only_ 'setup' binary bootstrap.
53# example: /etc/make.conf: GHC_BOOTSTRAP_FLAGS=-dynamic to make 54# example: /etc/portage/make.conf: GHC_BOOTSTRAP_FLAGS=-dynamic to make
54# linking 'setup' faster. 55# linking 'setup' faster.
55: ${GHC_BOOTSTRAP_FLAGS:=} 56: ${GHC_BOOTSTRAP_FLAGS:=}
56 57
58# @ECLASS-VARIABLE: CABAL_DEBUG_LOOSENING
59# @DESCRIPTION:
60# Show debug output for 'cabal_chdeps' function if set.
61# Needs working 'diff'.
62: ${CABAL_DEBUG_LOOSENING:=}
63
57HASKELL_CABAL_EXPF="pkg_setup src_compile src_test src_install" 64HASKELL_CABAL_EXPF="pkg_setup src_compile src_test src_install"
58 65
66# 'dev-haskell/cabal' passes those options with ./configure-based
67# configuration, but most packages don't need/don't accept it:
68# #515362, #515362
69QA_CONFIGURE_OPTIONS+=" --with-compiler --with-hc --with-hc-pkg --with-gcc"
70
59case "${EAPI:-0}" in 71case "${EAPI:-0}" in
60 2|3|4) HASKELL_CABAL_EXPF+=" src_configure" ;; 72 2|3|4|5) HASKELL_CABAL_EXPF+=" src_configure" ;;
61 *) ;; 73 *) ;;
62esac 74esac
63 75
64EXPORT_FUNCTIONS ${HASKELL_CABAL_EXPF} 76EXPORT_FUNCTIONS ${HASKELL_CABAL_EXPF}
65 77
125fi 137fi
126if [[ -z "${CABAL_BOOTSTRAP}" && -z "${CABAL_FROM_GHC}" ]]; then 138if [[ -z "${CABAL_BOOTSTRAP}" && -z "${CABAL_FROM_GHC}" ]]; then
127 DEPEND="${DEPEND} >=dev-haskell/cabal-${CABAL_MIN_VERSION}" 139 DEPEND="${DEPEND} >=dev-haskell/cabal-${CABAL_MIN_VERSION}"
128fi 140fi
129 141
130# Libraries require GHC to be installed.
131if [[ -n "${CABAL_HAS_LIBRARIES}" ]]; then
132 RDEPEND="${RDEPEND} dev-lang/ghc"
133fi
134
135# returns the version of cabal currently in use 142# returns the version of cabal currently in use
136_CABAL_VERSION_CACHE="" 143_CABAL_VERSION_CACHE=""
137cabal-version() { 144cabal-version() {
138 if [[ -z "${_CABAL_VERSION_CACHE}" ]]; then 145 if [[ -z "${_CABAL_VERSION_CACHE}" ]]; then
139 if [[ "${CABAL_BOOTSTRAP}" ]]; then 146 if [[ "${CABAL_BOOTSTRAP}" ]]; then
176 cabalpackage=Cabal-$(cabal-version) 183 cabalpackage=Cabal-$(cabal-version)
177 einfo "Using cabal-$(cabal-version)." 184 einfo "Using cabal-$(cabal-version)."
178 185
179 make_setup() { 186 make_setup() {
180 set -- -package "${cabalpackage}" --make "${setupmodule}" \ 187 set -- -package "${cabalpackage}" --make "${setupmodule}" \
188 ${HCFLAGS} \
181 ${GHC_BOOTSTRAP_FLAGS} \ 189 ${GHC_BOOTSTRAP_FLAGS} \
182 "$@" \ 190 "$@" \
183 -o setup 191 -o setup
184 echo $(ghc-getghc) ${HCFLAGS} "$@" 192 echo $(ghc-getghc) "$@"
185 $(ghc-getghc) "$@" 193 $(ghc-getghc) "$@"
186 } 194 }
187 if $(ghc-supports-shared-libraries); then 195 if $(ghc-supports-shared-libraries); then
188 # # some custom build systems might use external libraries, 196 # # some custom build systems might use external libraries,
189 # # for which we don't have shared libs, so keep static fallback 197 # # for which we don't have shared libs, so keep static fallback
190 # Disabled '-dynamic' as ghc does not embed RPATH to used extra-libraries:
191 # bug #411789, http://hackage.haskell.org/trac/ghc/ticket/5743#comment:3 198 # bug #411789, http://hackage.haskell.org/trac/ghc/ticket/5743#comment:3
192 # make_setup -dynamic "$@" || 199 # http://hackage.haskell.org/trac/ghc/ticket/7062
200 # http://hackage.haskell.org/trac/ghc/ticket/3072
201 # ghc does not set RPATH for extralibs, thus we do it ourselves by hands
202 einfo "Prepending $(ghc-libdir) to LD_LIBRARY_PATH"
203 if [[ ${CHOST} != *-darwin* ]]; then
204 LD_LIBRARY_PATH="$(ghc-libdir)${LD_LIBRARY_PATH:+:}${LD_LIBRARY_PATH}"
205 export LD_LIBRARY_PATH
206 else
207 DYLD_LIBRARY_PATH="$(ghc-libdir)${DYLD_LIBRARY_PATH:+:}${DYLD_LIBRARY_PATH}"
208 export DYLD_LIBRARY_PATH
209 fi
210 { make_setup -dynamic "$@" && ./setup --help >/dev/null; } ||
193 make_setup "$@" || die "compiling ${setupmodule} failed" 211 make_setup "$@" || die "compiling ${setupmodule} failed"
194 else 212 else
195 make_setup "$@" || die "compiling ${setupmodule} failed" 213 make_setup "$@" || die "compiling ${setupmodule} failed"
196 fi 214 fi
197} 215}
198 216
199cabal-mksetup() { 217cabal-mksetup() {
200 local setupdir 218 local setupdir=${1:-${S}}
219 local setup_src=${setupdir}/Setup.hs
201 220
202 if [[ -n $1 ]]; then
203 setupdir=$1
204 else
205 setupdir=${S}
206 fi
207
208 rm -f "${setupdir}"/Setup.{lhs,hs} 221 rm -vf "${setupdir}"/Setup.{lhs,hs}
222 elog "Creating 'Setup.hs' for 'Simple' build type."
209 223
210 echo 'import Distribution.Simple; main = defaultMainWithHooks defaultUserHooks' \ 224 echo 'import Distribution.Simple; main = defaultMainWithHooks defaultUserHooks' \
211 > $setupdir/Setup.hs || die "failed to create default Setup.hs" 225 > "${setup_src}" || die "failed to create default Setup.hs"
212} 226}
213 227
214cabal-hscolour() { 228cabal-hscolour() {
215 set -- hscolour "$@" 229 set -- hscolour "$@"
216 echo ./setup "$@" 230 echo ./setup "$@"
228 set -- haddock --hyperlink-source 242 set -- haddock --hyperlink-source
229 echo ./setup "$@" 243 echo ./setup "$@"
230 ./setup "$@" --hyperlink-source || die "setup haddock --hyperlink-source failed" 244 ./setup "$@" --hyperlink-source || die "setup haddock --hyperlink-source failed"
231} 245}
232 246
247cabal-die-if-nonempty() {
248 local breakage_type=$1
249 shift
250
251 [[ "${#@}" == 0 ]] && return 0
252 eerror "Detected ${breakage_type} packages: ${@}"
253 die "//==-- Please, run 'haskell-updater' to fix ${breakage_type} packages --==//"
254}
255
256cabal-show-brokens() {
257 elog "ghc-pkg check: 'checking for other broken packages:'"
258 # pretty-printer
259 $(ghc-getghcpkg) check 2>&1 \
260 | egrep -v '^Warning: haddock-(html|interfaces): ' \
261 | egrep -v '^Warning: include-dirs: ' \
262 | head -n 20
263
264 cabal-die-if-nonempty 'broken' \
265 $($(ghc-getghcpkg) check --simple-output)
266}
267
268cabal-show-old() {
269 cabal-die-if-nonempty 'outdated' \
270 $("${EPREFIX}"/usr/sbin/haskell-updater --quiet --upgrade --list-only)
271}
272
273cabal-show-brokens-and-die() {
274 cabal-show-brokens
275 cabal-show-old
276
277 die "$@"
278}
279
233cabal-configure() { 280cabal-configure() {
281 local cabalconf=()
234 has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX= 282 has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
235 283
236 if [[ -n "${CABAL_USE_HADDOCK}" ]] && use doc; then 284 if [[ -n "${CABAL_USE_HADDOCK}" ]] && use doc; then
237 cabalconf="${cabalconf} --with-haddock=${EPREFIX}/usr/bin/haddock" 285 cabalconf+=(--with-haddock=${EPREFIX}/usr/bin/haddock)
238 fi 286 fi
239 if [[ -n "${CABAL_USE_PROFILE}" ]] && use profile; then 287 if [[ -n "${CABAL_USE_PROFILE}" ]] && use profile; then
240 cabalconf="${cabalconf} --enable-library-profiling" 288 cabalconf+=(--enable-library-profiling)
241 fi 289 fi
242 if [[ -n "${CABAL_USE_ALEX}" ]]; then 290 if [[ -n "${CABAL_USE_ALEX}" ]]; then
243 cabalconf="${cabalconf} --with-alex=${EPREFIX}/usr/bin/alex" 291 cabalconf+=(--with-alex=${EPREFIX}/usr/bin/alex)
244 fi 292 fi
245 293
246 if [[ -n "${CABAL_USE_HAPPY}" ]]; then 294 if [[ -n "${CABAL_USE_HAPPY}" ]]; then
247 cabalconf="${cabalconf} --with-happy=${EPREFIX}/usr/bin/happy" 295 cabalconf+=(--with-happy=${EPREFIX}/usr/bin/happy)
248 fi 296 fi
249 297
250 if [[ -n "${CABAL_USE_C2HS}" ]]; then 298 if [[ -n "${CABAL_USE_C2HS}" ]]; then
251 cabalconf="${cabalconf} --with-c2hs=${EPREFIX}/usr/bin/c2hs" 299 cabalconf+=(--with-c2hs=${EPREFIX}/usr/bin/c2hs)
252 fi 300 fi
253 if [[ -n "${CABAL_USE_CPPHS}" ]]; then 301 if [[ -n "${CABAL_USE_CPPHS}" ]]; then
254 cabalconf="${cabalconf} --with-cpphs=${EPREFIX}/usr/bin/cpphs" 302 cabalconf+=(--with-cpphs=${EPREFIX}/usr/bin/cpphs)
255 fi 303 fi
256 if [[ -n "${CABAL_TEST_SUITE}" ]]; then 304 if [[ -n "${CABAL_TEST_SUITE}" ]]; then
257 cabalconf="${cabalconf} $(use_enable test tests)" 305 cabalconf+=($(use_enable test tests))
258 fi 306 fi
259 307
260 local option 308 local option
261 for option in ${HCFLAGS} 309 for option in ${HCFLAGS}
262 do 310 do
263 cabalconf+=" --ghc-option=$option" 311 cabalconf+=(--ghc-option="$option")
264 done 312 done
313
314 # parallel on all available cores
315 if ghc-supports-parallel-make; then
316 local max_jobs=$(makeopts_jobs)
317
318 # limit to very small value, as parallelism
319 # helps slightly, but makes things severely worse
320 # when amount of threads is Very Large.
321 [[ ${max_jobs} -gt 4 ]] && max_jobs=4
322
323 cabalconf+=(--ghc-option=-j"$max_jobs")
324 fi
265 325
266 # Building GHCi libs on ppc64 causes "TOC overflow". 326 # Building GHCi libs on ppc64 causes "TOC overflow".
267 if use ppc64; then 327 if use ppc64; then
268 cabalconf="${cabalconf} --disable-library-for-ghci" 328 cabalconf+=(--disable-library-for-ghci)
269 fi 329 fi
270 330
271 # currently cabal does not respect CFLAGS and LDFLAGS on it's own (bug #333217) 331 # currently cabal does not respect CFLAGS and LDFLAGS on it's own (bug #333217)
272 # so translate LDFLAGS to ghc parameters (without filtering) 332 # so translate LDFLAGS to ghc parameters (without filtering)
273 local flag 333 local flag
274 for flag in $LDFLAGS; do cabalconf="${cabalconf} --ghc-option=-optl$flag"; done 334 for flag in $LDFLAGS; do cabalconf+=(--ghc-option="-optl$flag"); done
275 335
276 # disable executable stripping for the executables, as portage will 336 # disable executable stripping for the executables, as portage will
277 # strip by itself, and pre-stripping gives a QA warning. 337 # strip by itself, and pre-stripping gives a QA warning.
278 # cabal versions previous to 1.4 does not strip executables, and does 338 # cabal versions previous to 1.4 does not strip executables, and does
279 # not accept the flag. 339 # not accept the flag.
280 # this fixes numerous bugs, amongst them; 340 # this fixes numerous bugs, amongst them;
281 # bug #251881, bug #251882, bug #251884, bug #251886, bug #299494 341 # bug #251881, bug #251882, bug #251884, bug #251886, bug #299494
282 cabalconf="${cabalconf} --disable-executable-stripping" 342 cabalconf+=(--disable-executable-stripping)
283 343
284 cabalconf="${cabalconf} --docdir=${EPREFIX}/usr/share/doc/${PF}" 344 cabalconf+=(--docdir="${EPREFIX}"/usr/share/doc/${PF})
285 # As of Cabal 1.2, configure is quite quiet. For diagnostic purposes 345 # As of Cabal 1.2, configure is quite quiet. For diagnostic purposes
286 # it's better if the configure chatter is in the build logs: 346 # it's better if the configure chatter is in the build logs:
287 cabalconf="${cabalconf} --verbose" 347 cabalconf+=(--verbose)
288 348
289 # We build shared version of our Cabal where ghc ships it's shared 349 # We build shared version of our Cabal where ghc ships it's shared
290 # version of it. We will link ./setup as dynamic binary againt Cabal later. 350 # version of it. We will link ./setup as dynamic binary againt Cabal later.
291 [[ ${CATEGORY}/${PN} == "dev-haskell/cabal" ]] && \ 351 [[ ${CATEGORY}/${PN} == "dev-haskell/cabal" ]] && \
292 $(ghc-supports-shared-libraries) && \ 352 $(ghc-supports-shared-libraries) && \
293 cabalconf="${cabalconf} --enable-shared" 353 cabalconf+=(--enable-shared)
354
355 if $(ghc-supports-shared-libraries); then
356 # maybe a bit lower
357 if $(ghc-supports-dynamic-by-default); then
358 cabalconf+=(--enable-shared)
359 fi
360 fi
361
362 # --sysconfdir appeared in Cabal-1.18+
363 if ./setup configure --help | grep -q -- --sysconfdir; then
364 cabalconf+=(--sysconfdir="${EPREFIX}"/etc)
365 fi
366
367 # appeared in Cabal-1.18+ (see '--disable-executable-stripping')
368 if ./setup configure --help | grep -q -- --disable-library-stripping; then
369 cabalconf+=(--disable-library-stripping)
370 fi
294 371
295 set -- configure \ 372 set -- configure \
296 --ghc --prefix="${EPREFIX}"/usr \ 373 --ghc --prefix="${EPREFIX}"/usr \
297 --with-compiler="$(ghc-getghc)" \ 374 --with-compiler="$(ghc-getghc)" \
298 --with-hc-pkg="$(ghc-getghcpkg)" \ 375 --with-hc-pkg="$(ghc-getghcpkg)" \
299 --prefix="${EPREFIX}"/usr \ 376 --prefix="${EPREFIX}"/usr \
300 --libdir="${EPREFIX}"/usr/$(get_libdir) \ 377 --libdir="${EPREFIX}"/usr/$(get_libdir) \
301 --libsubdir=${P}/ghc-$(ghc-version) \ 378 --libsubdir=${P}/ghc-$(ghc-version) \
302 --datadir="${EPREFIX}"/usr/share/ \ 379 --datadir="${EPREFIX}"/usr/share/ \
303 --datasubdir=${P}/ghc-$(ghc-version) \ 380 --datasubdir=${P}/ghc-$(ghc-version) \
304 ${cabalconf} \ 381 "${cabalconf[@]}" \
305 ${CABAL_CONFIGURE_FLAGS} \ 382 ${CABAL_CONFIGURE_FLAGS} \
306 ${CABAL_EXTRA_CONFIGURE_FLAGS} \ 383 ${CABAL_EXTRA_CONFIGURE_FLAGS} \
307 "$@" 384 "$@"
308 echo ./setup "$@" 385 echo ./setup "$@"
309 ./setup "$@" || die "setup configure failed" 386 ./setup "$@" || cabal-show-brokens-and-die "setup configure failed"
310} 387}
311 388
312cabal-build() { 389cabal-build() {
313 unset LANG LC_ALL LC_MESSAGES
314 set -- build ${CABAL_EXTRA_BUILD_FLAGS} "$@" 390 set -- build ${CABAL_EXTRA_BUILD_FLAGS} "$@"
315 echo ./setup "$@" 391 echo ./setup "$@"
316 ./setup "$@" \ 392 ./setup "$@" \
317 || die "setup build failed" 393 || die "setup build failed"
318} 394}
350# However portage still records the dependency and we can upgrade the package 426# However portage still records the dependency and we can upgrade the package
351# to a later one that's not included with ghc. 427# to a later one that's not included with ghc.
352# You can also put a space separated list, eg CABAL_CORE_LIB_GHC_PV="6.6 6.6.1". 428# You can also put a space separated list, eg CABAL_CORE_LIB_GHC_PV="6.6 6.6.1".
353cabal-is-dummy-lib() { 429cabal-is-dummy-lib() {
354 for version in ${CABAL_CORE_LIB_GHC_PV[*]}; do 430 for version in ${CABAL_CORE_LIB_GHC_PV[*]}; do
355 [[ "$(ghc-version)" == "$version" ]] && return 0 431 [[ "$(ghc-version)" == ${version} ]] && return 0
356 done 432 done
357 return 1 433 return 1
358} 434}
359 435
360# exported function: check if cabal is correctly installed for 436# exported function: check if cabal is correctly installed for
361# the currently active ghc (we cannot guarantee this with portage) 437# the currently active ghc (we cannot guarantee this with portage)
362haskell-cabal_pkg_setup() { 438haskell-cabal_pkg_setup() {
439 if [[ -n ${CABAL_HAS_LIBRARIES} ]]; then
440 [[ ${RDEPEND} == *dev-lang/ghc* ]] || eqawarn "QA Notice: A library does not have runtime dependency on dev-lang/ghc."
441 fi
363 if [[ -z "${CABAL_HAS_BINARIES}" ]] && [[ -z "${CABAL_HAS_LIBRARIES}" ]]; then 442 if [[ -z "${CABAL_HAS_BINARIES}" ]] && [[ -z "${CABAL_HAS_LIBRARIES}" ]]; then
364 eqawarn "QA Notice: Neither bin nor lib are in CABAL_FEATURES." 443 eqawarn "QA Notice: Neither bin nor lib are in CABAL_FEATURES."
365 fi 444 fi
366 if [[ -n "${CABAL_UNKNOWN}" ]]; then 445 if [[ -n "${CABAL_UNKNOWN}" ]]; then
367 eqawarn "QA Notice: Unknown entry in CABAL_FEATURES: ${CABAL_UNKNOWN}" 446 eqawarn "QA Notice: Unknown entry in CABAL_FEATURES: ${CABAL_UNKNOWN}"
459 local ghc_confdir_with_prefix="$(ghc-confdir)" 538 local ghc_confdir_with_prefix="$(ghc-confdir)"
460 # remove EPREFIX 539 # remove EPREFIX
461 dodir ${ghc_confdir_with_prefix#${EPREFIX}} 540 dodir ${ghc_confdir_with_prefix#${EPREFIX}}
462 local conf_file="${D}/$(ghc-confdir)/$(ghc-localpkgconf)" 541 local conf_file="${D}/$(ghc-confdir)/$(ghc-localpkgconf)"
463 [[ -e $conf_file ]] || echo '[]' > "$conf_file" || die 542 [[ -e $conf_file ]] || echo '[]' > "$conf_file" || die
543
544 # make sure installed packages do not destroy ghc's
545 # bundled packages
546 local initial_pkg_db=${ROOT}/$(ghc-libdir)/package.conf.d.initial
547 if [[ -e ${initial_pkg_db} ]]; then
548 local checked_pkg
549 for checked_pkg in $(ghc-listpkg "${conf_file}")
550 do
551 local initial_pkg
552 for initial_pkg in $(ghc-listpkg "${initial_pkg_db}"); do
553 if [[ ${checked_pkg} = ${initial_pkg} ]]; then
554 eerror "Package ${checked_pkg} is shipped with $(ghc-version)."
555 eerror "Ebuild author forgot CABAL_CORE_LIB_GHC_PV entry."
556 eerror "Found in ${initial_pkg_db}."
557 die
558 fi
559 done
560 done
561 fi
464} 562}
465 563
466haskell-cabal_src_install() { 564haskell-cabal_src_install() {
467 pushd "${S}" > /dev/null 565 pushd "${S}" > /dev/null
468 566
469 cabal_src_install 567 cabal_src_install
470 568
471 popd > /dev/null 569 popd > /dev/null
472} 570}
473 571
572# @FUNCTION: cabal_flag
573# @DESCRIPTION:
474# ebuild.sh:use_enable() taken as base 574# ebuild.sh:use_enable() taken as base
475# 575#
476# Usage examples: 576# Usage examples:
477# 577#
478# CABAL_CONFIGURE_FLAGS=$(cabal_flag gui) 578# CABAL_CONFIGURE_FLAGS=$(cabal_flag gui)
496 echo "--flags=-${UWORD}" 596 echo "--flags=-${UWORD}"
497 fi 597 fi
498 598
499 return 0 599 return 0
500} 600}
601
602# @FUNCTION: cabal_chdeps
603# @DESCRIPTION:
604# Allows easier patching of $CABAL_FILE (${S}/${PN}.cabal by default)
605# depends
606#
607# Accepts argument list as pairs of substitutions: <from-string> <to-string>...
608#
609# Dies on error.
610#
611# Usage examples:
612#
613# src_prepare() {
614# cabal_chdeps \
615# 'base >= 4.2 && < 4.6' 'base >= 4.2 && < 4.7' \
616# 'containers ==0.4.*' 'containers >= 0.4 && < 0.6'
617#}
618# or
619# src_prepare() {
620# CABAL_FILE=${S}/${MY_PN}.cabal cabal_chdeps \
621# 'base >= 4.2 && < 4.6' 'base >= 4.2 && < 4.7'
622# CABAL_FILE=${S}/${MY_PN}-tools.cabal cabal_chdeps \
623# 'base == 3.*' 'base >= 4.2 && < 4.7'
624#}
625#
626cabal_chdeps() {
627 local cabal_fn=${MY_PN:-${PN}}.cabal
628 local cf=${CABAL_FILE:-${S}/${cabal_fn}}
629 local from_ss # ss - substring
630 local to_ss
631 local orig_c # c - contents
632 local new_c
633
634 [[ -f $cf ]] || die "cabal file '$cf' does not exist"
635
636 orig_c=$(< "$cf")
637
638 while :; do
639 from_pat=$1
640 to_str=$2
641
642 [[ -n ${from_pat} ]] || break
643 [[ -n ${to_str} ]] || die "'${from_str}' does not have 'to' part"
644
645 einfo "CHDEP: '${from_pat}' -> '${to_str}'"
646
647 # escape pattern-like symbols
648 from_pat=${from_pat//\*/\\*}
649 from_pat=${from_pat//\[/\\[}
650
651 new_c=${orig_c//${from_pat}/${to_str}}
652
653 if [[ -n $CABAL_DEBUG_LOOSENING ]]; then
654 echo "${orig_c}" >"${T}/${cf}".pre
655 echo "${new_c}" >"${T}/${cf}".post
656 diff -u "${T}/${cf}".{pre,post}
657 fi
658
659 [[ "${orig_c}" == "${new_c}" ]] && die "no trigger for '${from_pat}'"
660 orig_c=${new_c}
661 shift
662 shift
663 done
664
665 echo "${new_c}" > "$cf" ||
666 die "failed to update"
667}
668
669# @FUNCTION: replace-hcflags
670# @USAGE: <old> <new>
671# @DESCRIPTION:
672# Replace the <old> flag with <new> in HCFLAGS. Accepts shell globs for <old>.
673# The implementation is picked from flag-o-matic.eclass:replace-flags()
674replace-hcflags() {
675 [[ $# != 2 ]] && die "Usage: replace-hcflags <old flag> <new flag>"
676
677 local f new=()
678 for f in ${HCFLAGS} ; do
679 # Note this should work with globs like -O*
680 if [[ ${f} == ${1} ]]; then
681 einfo "HCFLAGS: replacing '${f}' to '${2}'"
682 f=${2}
683 fi
684 new+=( "${f}" )
685 done
686 export HCFLAGS="${new[*]}"
687
688 return 0
689}

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