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Revision 1.45 - (show annotations) (download)
Fri Jun 27 07:16:47 2014 UTC (4 years, 7 months ago) by slyfox
Branch: MAIN
Changes since 1.44: +5 -2 lines
Disable QA warning on '--with-hc --with-hc-pkg --with-gcc' flags passed by 'dev-haskell/cabal' to every configure-based haskell package. Don't unset LANG/LC_ALL/LC_MESSAGES anymore.

1 # Copyright 1999-2014 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/haskell-cabal.eclass,v 1.44 2014/05/22 16:35:11 slyfox Exp $
4
5 # @ECLASS: haskell-cabal.eclass
6 # @MAINTAINER:
7 # Haskell herd <haskell@gentoo.org>
8 # @AUTHOR:
9 # Original author: Andres Loeh <kosmikus@gentoo.org>
10 # Original author: Duncan Coutts <dcoutts@gentoo.org>
11 # @BLURB: for packages that make use of the Haskell Common Architecture for Building Applications and Libraries (cabal)
12 # @DESCRIPTION:
13 # Basic instructions:
14 #
15 # Before inheriting the eclass, set CABAL_FEATURES to
16 # reflect the tools and features that the package makes
17 # use of.
18 #
19 # Currently supported features:
20 # haddock -- for documentation generation
21 # hscolour -- generation of colourised sources
22 # hoogle -- generation of documentation search index
23 # alex -- lexer/scanner generator
24 # happy -- parser generator
25 # c2hs -- C interface generator
26 # cpphs -- C preprocessor clone written in Haskell
27 # profile -- if package supports to build profiling-enabled libraries
28 # bootstrap -- only used for the cabal package itself
29 # bin -- the package installs binaries
30 # lib -- the package installs libraries
31 # nocabaldep -- don't add dependency on cabal.
32 # only used for packages that _must_ not pull the dependency
33 # on cabal, but still use this eclass (e.g. haskell-updater).
34 # test-suite -- add support for cabal test-suites (introduced in Cabal-1.8)
35
36 inherit eutils ghc-package multilib multiprocessing
37
38 # @ECLASS-VARIABLE: CABAL_EXTRA_CONFIGURE_FLAGS
39 # @DESCRIPTION:
40 # User-specified additional parameters passed to 'setup configure'.
41 # example: /etc/portage/make.conf: CABAL_EXTRA_CONFIGURE_FLAGS=--enable-shared
42 : ${CABAL_EXTRA_CONFIGURE_FLAGS:=}
43
44 # @ECLASS-VARIABLE: CABAL_EXTRA_BUILD_FLAGS
45 # @DESCRIPTION:
46 # User-specified additional parameters passed to 'setup build'.
47 # example: /etc/portage/make.conf: CABAL_EXTRA_BUILD_FLAGS=-v
48 : ${CABAL_EXTRA_BUILD_FLAGS:=}
49
50 # @ECLASS-VARIABLE: GHC_BOOTSTRAP_FLAGS
51 # @DESCRIPTION:
52 # User-specified additional parameters for ghc when building
53 # _only_ 'setup' binary bootstrap.
54 # example: /etc/portage/make.conf: GHC_BOOTSTRAP_FLAGS=-dynamic to make
55 # linking 'setup' faster.
56 : ${GHC_BOOTSTRAP_FLAGS:=}
57
58 # @ECLASS-VARIABLE: CABAL_DEBUG_LOOSENING
59 # @DESCRIPTION:
60 # Show debug output for 'cabal_chdeps' function if set.
61 # Needs working 'diff'.
62 : ${CABAL_DEBUG_LOOSENING:=}
63
64 HASKELL_CABAL_EXPF="pkg_setup src_compile src_test src_install"
65
66 # 'dev-haskell/cabal' passes those options with ./configure-based
67 # configuration, but most packages don't need/don't accept it
68 QA_CONFIGURE_OPTIONS+=" --with-hc --with-hc-pkg --with-gcc"
69
70 case "${EAPI:-0}" in
71 2|3|4|5) HASKELL_CABAL_EXPF+=" src_configure" ;;
72 *) ;;
73 esac
74
75 EXPORT_FUNCTIONS ${HASKELL_CABAL_EXPF}
76
77 for feature in ${CABAL_FEATURES}; do
78 case ${feature} in
79 haddock) CABAL_USE_HADDOCK=yes;;
80 hscolour) CABAL_USE_HSCOLOUR=yes;;
81 hoogle) CABAL_USE_HOOGLE=yes;;
82 alex) CABAL_USE_ALEX=yes;;
83 happy) CABAL_USE_HAPPY=yes;;
84 c2hs) CABAL_USE_C2HS=yes;;
85 cpphs) CABAL_USE_CPPHS=yes;;
86 profile) CABAL_USE_PROFILE=yes;;
87 bootstrap) CABAL_BOOTSTRAP=yes;;
88 bin) CABAL_HAS_BINARIES=yes;;
89 lib) CABAL_HAS_LIBRARIES=yes;;
90 nocabaldep) CABAL_FROM_GHC=yes;;
91 test-suite) CABAL_TEST_SUITE=yes;;
92 *) CABAL_UNKNOWN="${CABAL_UNKNOWN} ${feature}";;
93 esac
94 done
95
96 if [[ -n "${CABAL_USE_HADDOCK}" ]]; then
97 IUSE="${IUSE} doc"
98 # don't require depend on itself to build docs.
99 # ebuild bootstraps docs from just built binary
100 [[ ${CATEGORY}/${PN} = "dev-haskell/haddock" ]] || DEPEND="${DEPEND} doc? ( dev-haskell/haddock )"
101 fi
102
103 if [[ -n "${CABAL_USE_HSCOLOUR}" ]]; then
104 IUSE="${IUSE} hscolour"
105 DEPEND="${DEPEND} hscolour? ( dev-haskell/hscolour )"
106 fi
107
108 if [[ -n "${CABAL_USE_ALEX}" ]]; then
109 DEPEND="${DEPEND} dev-haskell/alex"
110 fi
111
112 if [[ -n "${CABAL_USE_HAPPY}" ]]; then
113 DEPEND="${DEPEND} dev-haskell/happy"
114 fi
115
116 if [[ -n "${CABAL_USE_C2HS}" ]]; then
117 DEPEND="${DEPEND} dev-haskell/c2hs"
118 fi
119
120 if [[ -n "${CABAL_USE_CPPHS}" ]]; then
121 DEPEND="${DEPEND} dev-haskell/cpphs"
122 fi
123
124 if [[ -n "${CABAL_USE_PROFILE}" ]]; then
125 IUSE="${IUSE} profile"
126 fi
127
128 if [[ -n "${CABAL_TEST_SUITE}" ]]; then
129 IUSE="${IUSE} test"
130 fi
131
132 # We always use a standalone version of Cabal, rather than the one that comes
133 # with GHC. But of course we can't depend on cabal when building cabal itself.
134 if [[ -z ${CABAL_MIN_VERSION} ]]; then
135 CABAL_MIN_VERSION=1.1.4
136 fi
137 if [[ -z "${CABAL_BOOTSTRAP}" && -z "${CABAL_FROM_GHC}" ]]; then
138 DEPEND="${DEPEND} >=dev-haskell/cabal-${CABAL_MIN_VERSION}"
139 fi
140
141 # returns the version of cabal currently in use
142 _CABAL_VERSION_CACHE=""
143 cabal-version() {
144 if [[ -z "${_CABAL_VERSION_CACHE}" ]]; then
145 if [[ "${CABAL_BOOTSTRAP}" ]]; then
146 # We're bootstrapping cabal, so the cabal version is the version
147 # of this package itself.
148 _CABAL_VERSION_CACHE="${PV}"
149 elif [[ "${CABAL_FROM_GHC}" ]]; then
150 local cabal_package=$(echo "$(ghc-libdir)"/Cabal-*)
151 # /path/to/ghc/Cabal-${VER} -> ${VER}
152 _CABAL_VERSION_CACHE="${cabal_package/*Cabal-/}"
153 else
154 # We ask portage, not ghc, so that we only pick up
155 # portage-installed cabal versions.
156 _CABAL_VERSION_CACHE="$(ghc-extractportageversion dev-haskell/cabal)"
157 fi
158 fi
159 echo "${_CABAL_VERSION_CACHE}"
160 }
161
162 cabal-bootstrap() {
163 local setupmodule
164 local cabalpackage
165 if [[ -f "${S}/Setup.lhs" ]]; then
166 setupmodule="${S}/Setup.lhs"
167 elif [[ -f "${S}/Setup.hs" ]]; then
168 setupmodule="${S}/Setup.hs"
169 else
170 die "No Setup.lhs or Setup.hs found"
171 fi
172
173 if [[ -z "${CABAL_BOOTSTRAP}" && -z "${CABAL_FROM_GHC}" ]] && ! ghc-sanecabal "${CABAL_MIN_VERSION}"; then
174 eerror "The package dev-haskell/cabal is not correctly installed for"
175 eerror "the currently active version of ghc ($(ghc-version)). Please"
176 eerror "run haskell-updater or re-build dev-haskell/cabal."
177 die "cabal is not correctly installed"
178 fi
179
180 # We build the setup program using the latest version of
181 # cabal that we have installed
182 cabalpackage=Cabal-$(cabal-version)
183 einfo "Using cabal-$(cabal-version)."
184
185 make_setup() {
186 set -- -package "${cabalpackage}" --make "${setupmodule}" \
187 ${HCFLAGS} \
188 ${GHC_BOOTSTRAP_FLAGS} \
189 "$@" \
190 -o setup
191 echo $(ghc-getghc) "$@"
192 $(ghc-getghc) "$@"
193 }
194 if $(ghc-supports-shared-libraries); then
195 # # some custom build systems might use external libraries,
196 # # for which we don't have shared libs, so keep static fallback
197 # bug #411789, http://hackage.haskell.org/trac/ghc/ticket/5743#comment:3
198 # http://hackage.haskell.org/trac/ghc/ticket/7062
199 # http://hackage.haskell.org/trac/ghc/ticket/3072
200 # ghc does not set RPATH for extralibs, thus we do it ourselves by hands
201 einfo "Prepending $(ghc-libdir) to LD_LIBRARY_PATH"
202 if [[ ${CHOST} != *-darwin* ]]; then
203 LD_LIBRARY_PATH="$(ghc-libdir)${LD_LIBRARY_PATH:+:}${LD_LIBRARY_PATH}"
204 export LD_LIBRARY_PATH
205 else
206 DYLD_LIBRARY_PATH="$(ghc-libdir)${DYLD_LIBRARY_PATH:+:}${DYLD_LIBRARY_PATH}"
207 export DYLD_LIBRARY_PATH
208 fi
209 { make_setup -dynamic "$@" && ./setup --help >/dev/null; } ||
210 make_setup "$@" || die "compiling ${setupmodule} failed"
211 else
212 make_setup "$@" || die "compiling ${setupmodule} failed"
213 fi
214 }
215
216 cabal-mksetup() {
217 local setupdir=${1:-${S}}
218 local setup_src=${setupdir}/Setup.hs
219
220 rm -vf "${setupdir}"/Setup.{lhs,hs}
221 elog "Creating 'Setup.hs' for 'Simple' build type."
222
223 echo 'import Distribution.Simple; main = defaultMainWithHooks defaultUserHooks' \
224 > "${setup_src}" || die "failed to create default Setup.hs"
225 }
226
227 cabal-hscolour() {
228 set -- hscolour "$@"
229 echo ./setup "$@"
230 ./setup "$@" || die "setup hscolour failed"
231 }
232
233 cabal-haddock() {
234 set -- haddock "$@"
235 echo ./setup "$@"
236 ./setup "$@" || die "setup haddock failed"
237 }
238
239 cabal-hscolour-haddock() {
240 # --hyperlink-source implies calling 'setup hscolour'
241 set -- haddock --hyperlink-source
242 echo ./setup "$@"
243 ./setup "$@" --hyperlink-source || die "setup haddock --hyperlink-source failed"
244 }
245
246 cabal-die-if-nonempty() {
247 local breakage_type=$1
248 shift
249
250 [[ "${#@}" == 0 ]] && return 0
251 eerror "Detected ${breakage_type} packages: ${@}"
252 die "//==-- Please, run 'haskell-updater' to fix ${breakage_type} packages --==//"
253 }
254
255 cabal-show-brokens() {
256 elog "ghc-pkg check: 'checking for other broken packages:'"
257 # pretty-printer
258 $(ghc-getghcpkg) check 2>&1 \
259 | egrep -v '^Warning: haddock-(html|interfaces): ' \
260 | egrep -v '^Warning: include-dirs: ' \
261 | head -n 20
262
263 cabal-die-if-nonempty 'broken' \
264 $($(ghc-getghcpkg) check --simple-output)
265 }
266
267 cabal-show-old() {
268 cabal-die-if-nonempty 'outdated' \
269 $("${EPREFIX}"/usr/sbin/haskell-updater --quiet --upgrade --list-only)
270 }
271
272 cabal-show-brokens-and-die() {
273 cabal-show-brokens
274 cabal-show-old
275
276 die "$@"
277 }
278
279 cabal-configure() {
280 local cabalconf=()
281 has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
282
283 if [[ -n "${CABAL_USE_HADDOCK}" ]] && use doc; then
284 cabalconf+=(--with-haddock=${EPREFIX}/usr/bin/haddock)
285 fi
286 if [[ -n "${CABAL_USE_PROFILE}" ]] && use profile; then
287 cabalconf+=(--enable-library-profiling)
288 fi
289 if [[ -n "${CABAL_USE_ALEX}" ]]; then
290 cabalconf+=(--with-alex=${EPREFIX}/usr/bin/alex)
291 fi
292
293 if [[ -n "${CABAL_USE_HAPPY}" ]]; then
294 cabalconf+=(--with-happy=${EPREFIX}/usr/bin/happy)
295 fi
296
297 if [[ -n "${CABAL_USE_C2HS}" ]]; then
298 cabalconf+=(--with-c2hs=${EPREFIX}/usr/bin/c2hs)
299 fi
300 if [[ -n "${CABAL_USE_CPPHS}" ]]; then
301 cabalconf+=(--with-cpphs=${EPREFIX}/usr/bin/cpphs)
302 fi
303 if [[ -n "${CABAL_TEST_SUITE}" ]]; then
304 cabalconf+=($(use_enable test tests))
305 fi
306
307 local option
308 for option in ${HCFLAGS}
309 do
310 cabalconf+=(--ghc-option="$option")
311 done
312
313 # parallel on all available cores
314 if ghc-supports-parallel-make; then
315 local max_jobs=$(makeopts_jobs)
316
317 # limit to very small value, as parallelism
318 # helps slightly, but makes things severely worse
319 # when amount of threads is Very Large.
320 [[ ${max_jobs} -gt 4 ]] && max_jobs=4
321
322 cabalconf+=(--ghc-option=-j"$max_jobs")
323 fi
324
325 # Building GHCi libs on ppc64 causes "TOC overflow".
326 if use ppc64; then
327 cabalconf+=(--disable-library-for-ghci)
328 fi
329
330 # currently cabal does not respect CFLAGS and LDFLAGS on it's own (bug #333217)
331 # so translate LDFLAGS to ghc parameters (without filtering)
332 local flag
333 for flag in $LDFLAGS; do cabalconf+=(--ghc-option="-optl$flag"); done
334
335 # disable executable stripping for the executables, as portage will
336 # strip by itself, and pre-stripping gives a QA warning.
337 # cabal versions previous to 1.4 does not strip executables, and does
338 # not accept the flag.
339 # this fixes numerous bugs, amongst them;
340 # bug #251881, bug #251882, bug #251884, bug #251886, bug #299494
341 cabalconf+=(--disable-executable-stripping)
342
343 cabalconf+=(--docdir="${EPREFIX}"/usr/share/doc/${PF})
344 # As of Cabal 1.2, configure is quite quiet. For diagnostic purposes
345 # it's better if the configure chatter is in the build logs:
346 cabalconf+=(--verbose)
347
348 # We build shared version of our Cabal where ghc ships it's shared
349 # version of it. We will link ./setup as dynamic binary againt Cabal later.
350 [[ ${CATEGORY}/${PN} == "dev-haskell/cabal" ]] && \
351 $(ghc-supports-shared-libraries) && \
352 cabalconf+=(--enable-shared)
353
354 if $(ghc-supports-shared-libraries); then
355 # maybe a bit lower
356 if $(ghc-supports-dynamic-by-default); then
357 cabalconf+=(--enable-shared)
358 fi
359 fi
360
361 # --sysconfdir appeared in Cabal-1.18+
362 if ./setup configure --help | grep -q -- --sysconfdir; then
363 cabalconf+=(--sysconfdir="${EPREFIX}"/etc)
364 fi
365
366 # appeared in Cabal-1.18+ (see '--disable-executable-stripping')
367 if ./setup configure --help | grep -q -- --disable-library-stripping; then
368 cabalconf+=(--disable-library-stripping)
369 fi
370
371 set -- configure \
372 --ghc --prefix="${EPREFIX}"/usr \
373 --with-compiler="$(ghc-getghc)" \
374 --with-hc-pkg="$(ghc-getghcpkg)" \
375 --prefix="${EPREFIX}"/usr \
376 --libdir="${EPREFIX}"/usr/$(get_libdir) \
377 --libsubdir=${P}/ghc-$(ghc-version) \
378 --datadir="${EPREFIX}"/usr/share/ \
379 --datasubdir=${P}/ghc-$(ghc-version) \
380 "${cabalconf[@]}" \
381 ${CABAL_CONFIGURE_FLAGS} \
382 ${CABAL_EXTRA_CONFIGURE_FLAGS} \
383 "$@"
384 echo ./setup "$@"
385 ./setup "$@" || cabal-show-brokens-and-die "setup configure failed"
386 }
387
388 cabal-build() {
389 set -- build ${CABAL_EXTRA_BUILD_FLAGS} "$@"
390 echo ./setup "$@"
391 ./setup "$@" \
392 || die "setup build failed"
393 }
394
395 cabal-copy() {
396 has "${EAPI:-0}" 0 1 2 && ! use prefix && ED=${D}
397
398 set -- copy --destdir="${D}" "$@"
399 echo ./setup "$@"
400 ./setup "$@" || die "setup copy failed"
401
402 # cabal is a bit eager about creating dirs,
403 # so remove them if they are empty
404 rmdir "${ED}/usr/bin" 2> /dev/null
405 }
406
407 cabal-pkg() {
408 # This does not actually register since we're using true instead
409 # of ghc-pkg. So it just leaves the .conf file and we can
410 # register that ourselves (if it exists).
411
412 if [[ -n ${CABAL_HAS_LIBRARIES} ]]; then
413 # Newer cabal can generate a package conf for us:
414 ./setup register --gen-pkg-config="${T}/${P}.conf"
415 ghc-setup-pkg "${T}/${P}.conf"
416 ghc-install-pkg
417 fi
418 }
419
420 # Some cabal libs are bundled along with some versions of ghc
421 # eg filepath-1.0 comes with ghc-6.6.1
422 # by putting CABAL_CORE_LIB_GHC_PV="6.6.1" in an ebuild we are declaring that
423 # when building with this version of ghc, the ebuild is a dummy that is it will
424 # install no files since the package is already included with ghc.
425 # However portage still records the dependency and we can upgrade the package
426 # to a later one that's not included with ghc.
427 # You can also put a space separated list, eg CABAL_CORE_LIB_GHC_PV="6.6 6.6.1".
428 cabal-is-dummy-lib() {
429 for version in ${CABAL_CORE_LIB_GHC_PV[*]}; do
430 [[ "$(ghc-version)" == ${version} ]] && return 0
431 done
432 return 1
433 }
434
435 # exported function: check if cabal is correctly installed for
436 # the currently active ghc (we cannot guarantee this with portage)
437 haskell-cabal_pkg_setup() {
438 if [[ -n ${CABAL_HAS_LIBRARIES} ]]; then
439 [[ ${RDEPEND} == *dev-lang/ghc* ]] || eqawarn "QA Notice: A library does not have runtime dependency on dev-lang/ghc."
440 fi
441 if [[ -z "${CABAL_HAS_BINARIES}" ]] && [[ -z "${CABAL_HAS_LIBRARIES}" ]]; then
442 eqawarn "QA Notice: Neither bin nor lib are in CABAL_FEATURES."
443 fi
444 if [[ -n "${CABAL_UNKNOWN}" ]]; then
445 eqawarn "QA Notice: Unknown entry in CABAL_FEATURES: ${CABAL_UNKNOWN}"
446 fi
447 if cabal-is-dummy-lib; then
448 einfo "${P} is included in ghc-${CABAL_CORE_LIB_GHC_PV}, nothing to install."
449 fi
450 }
451
452 haskell-cabal_src_configure() {
453 cabal-is-dummy-lib && return
454
455 pushd "${S}" > /dev/null
456
457 cabal-bootstrap
458
459 cabal-configure "$@"
460
461 popd > /dev/null
462 }
463
464 # exported function: nice alias
465 cabal_src_configure() {
466 haskell-cabal_src_configure "$@"
467 }
468
469 # exported function: cabal-style bootstrap configure and compile
470 cabal_src_compile() {
471 # it's a common mistake when one bumps ebuild to EAPI="2" (and upper)
472 # and forgets to separate src_compile() to src_configure()/src_compile().
473 # Such error leads to default src_configure and we lose all passed flags.
474 if ! has "${EAPI:-0}" 0 1; then
475 local passed_flag
476 for passed_flag in "$@"; do
477 [[ ${passed_flag} == --flags=* ]] && \
478 eqawarn "QA Notice: Cabal option '${passed_flag}' has effect only in src_configure()"
479 done
480 fi
481
482 cabal-is-dummy-lib && return
483
484 has src_configure ${HASKELL_CABAL_EXPF} || haskell-cabal_src_configure "$@"
485 cabal-build
486
487 if [[ -n "${CABAL_USE_HADDOCK}" ]] && use doc; then
488 if [[ -n "${CABAL_USE_HSCOLOUR}" ]] && use hscolour; then
489 # hscolour and haddock
490 cabal-hscolour-haddock
491 else
492 # just haddock
493 cabal-haddock
494 fi
495 else
496 if [[ -n "${CABAL_USE_HSCOLOUR}" ]] && use hscolour; then
497 # just hscolour
498 cabal-hscolour
499 fi
500 fi
501 }
502
503 haskell-cabal_src_compile() {
504 pushd "${S}" > /dev/null
505
506 cabal_src_compile "$@"
507
508 popd > /dev/null
509 }
510
511 haskell-cabal_src_test() {
512 pushd "${S}" > /dev/null
513
514 if cabal-is-dummy-lib; then
515 einfo ">>> No tests for dummy library: ${CATEGORY}/${PF}"
516 else
517 einfo ">>> Test phase [cabal test]: ${CATEGORY}/${PF}"
518 set -- test "$@"
519 echo ./setup "$@"
520 ./setup "$@" || die "cabal test failed"
521 fi
522
523 popd > /dev/null
524 }
525
526 # exported function: cabal-style copy and register
527 cabal_src_install() {
528 has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
529
530 if ! cabal-is-dummy-lib; then
531 cabal-copy
532 cabal-pkg
533 fi
534
535 # create a dummy local package conf file for haskell-updater
536 # if it does not exist (dummy libraries and binaries w/o libraries)
537 local ghc_confdir_with_prefix="$(ghc-confdir)"
538 # remove EPREFIX
539 dodir ${ghc_confdir_with_prefix#${EPREFIX}}
540 local conf_file="${D}/$(ghc-confdir)/$(ghc-localpkgconf)"
541 [[ -e $conf_file ]] || echo '[]' > "$conf_file" || die
542
543 # make sure installed packages do not destroy ghc's
544 # bundled packages
545 local initial_pkg_db=${ROOT}/$(ghc-libdir)/package.conf.d.initial
546 if [[ -e ${initial_pkg_db} ]]; then
547 local checked_pkg
548 for checked_pkg in $(ghc-listpkg "${conf_file}")
549 do
550 local initial_pkg
551 for initial_pkg in $(ghc-listpkg "${initial_pkg_db}"); do
552 if [[ ${checked_pkg} = ${initial_pkg} ]]; then
553 eerror "Package ${checked_pkg} is shipped with $(ghc-version)."
554 eerror "Ebuild author forgot CABAL_CORE_LIB_GHC_PV entry."
555 eerror "Found in ${initial_pkg_db}."
556 die
557 fi
558 done
559 done
560 fi
561 }
562
563 haskell-cabal_src_install() {
564 pushd "${S}" > /dev/null
565
566 cabal_src_install
567
568 popd > /dev/null
569 }
570
571 # @FUNCTION: cabal_flag
572 # @DESCRIPTION:
573 # ebuild.sh:use_enable() taken as base
574 #
575 # Usage examples:
576 #
577 # CABAL_CONFIGURE_FLAGS=$(cabal_flag gui)
578 # leads to "--flags=gui" or "--flags=-gui" (useflag 'gui')
579 #
580 # CABAL_CONFIGURE_FLAGS=$(cabal_flag gtk gui)
581 # also leads to "--flags=gui" or " --flags=-gui" (useflag 'gtk')
582 #
583 cabal_flag() {
584 if [[ -z "$1" ]]; then
585 echo "!!! cabal_flag() called without a parameter." >&2
586 echo "!!! cabal_flag() <USEFLAG> [<cabal_flagname>]" >&2
587 return 1
588 fi
589
590 local UWORD=${2:-$1}
591
592 if use "$1"; then
593 echo "--flags=${UWORD}"
594 else
595 echo "--flags=-${UWORD}"
596 fi
597
598 return 0
599 }
600
601 # @FUNCTION: cabal_chdeps
602 # @DESCRIPTION:
603 # Allows easier patching of $CABAL_FILE (${S}/${PN}.cabal by default)
604 # depends
605 #
606 # Accepts argument list as pairs of substitutions: <from-string> <to-string>...
607 #
608 # Dies on error.
609 #
610 # Usage examples:
611 #
612 # src_prepare() {
613 # cabal_chdeps \
614 # 'base >= 4.2 && < 4.6' 'base >= 4.2 && < 4.7' \
615 # 'containers ==0.4.*' 'containers >= 0.4 && < 0.6'
616 #}
617 # or
618 # src_prepare() {
619 # CABAL_FILE=${S}/${MY_PN}.cabal cabal_chdeps \
620 # 'base >= 4.2 && < 4.6' 'base >= 4.2 && < 4.7'
621 # CABAL_FILE=${S}/${MY_PN}-tools.cabal cabal_chdeps \
622 # 'base == 3.*' 'base >= 4.2 && < 4.7'
623 #}
624 #
625 cabal_chdeps() {
626 local cabal_fn=${MY_PN:-${PN}}.cabal
627 local cf=${CABAL_FILE:-${S}/${cabal_fn}}
628 local from_ss # ss - substring
629 local to_ss
630 local orig_c # c - contents
631 local new_c
632
633 [[ -f $cf ]] || die "cabal file '$cf' does not exist"
634
635 orig_c=$(< "$cf")
636
637 while :; do
638 from_pat=$1
639 to_str=$2
640
641 [[ -n ${from_pat} ]] || break
642 [[ -n ${to_str} ]] || die "'${from_str}' does not have 'to' part"
643
644 einfo "CHDEP: '${from_pat}' -> '${to_str}'"
645
646 # escape pattern-like symbols
647 from_pat=${from_pat//\*/\\*}
648 from_pat=${from_pat//\[/\\[}
649
650 new_c=${orig_c//${from_pat}/${to_str}}
651
652 if [[ -n $CABAL_DEBUG_LOOSENING ]]; then
653 echo "${orig_c}" >"${T}/${cf}".pre
654 echo "${new_c}" >"${T}/${cf}".post
655 diff -u "${T}/${cf}".{pre,post}
656 fi
657
658 [[ "${orig_c}" == "${new_c}" ]] && die "no trigger for '${from_pat}'"
659 orig_c=${new_c}
660 shift
661 shift
662 done
663
664 echo "${new_c}" > "$cf" ||
665 die "failed to update"
666 }
667
668 # @FUNCTION: replace-hcflags
669 # @USAGE: <old> <new>
670 # @DESCRIPTION:
671 # Replace the <old> flag with <new> in HCFLAGS. Accepts shell globs for <old>.
672 # The implementation is picked from flag-o-matic.eclass:replace-flags()
673 replace-hcflags() {
674 [[ $# != 2 ]] && die "Usage: replace-hcflags <old flag> <new flag>"
675
676 local f new=()
677 for f in ${HCFLAGS} ; do
678 # Note this should work with globs like -O*
679 if [[ ${f} == ${1} ]]; then
680 einfo "HCFLAGS: replacing '${f}' to '${2}'"
681 f=${2}
682 fi
683 new+=( "${f}" )
684 done
685 export HCFLAGS="${new[*]}"
686
687 return 0
688 }

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