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Revision 1.46 - (show annotations) (download)
Fri Jun 27 07:26:18 2014 UTC (2 months, 3 weeks ago) by slyfox
Branch: MAIN
CVS Tags: HEAD
Changes since 1.45: +4 -3 lines
Error occurred while calculating annotation data.
Disable QA warning on '--with-compiler' passed by 'dev-haskell/cabal' (bug #515360 by Patrick Lauer).

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 1.45 2014/06/27 07:16:47 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 : ${CABAL_DEBUG_LOOSENING:=}
63
64 HASKELL_CABAL_EXPF="pkg_setup src_compile src_test src_install"
65
66 # 'dev-haskell/cabal' passes those options with ./configure-based
67 # configuration, but most packages don't need/don't accept it:
68 # #515362, #515362
69 QA_CONFIGURE_OPTIONS+=" --with-compiler --with-hc --with-hc-pkg --with-gcc"
70
71 case "${EAPI:-0}" in
72 2|3|4|5) HASKELL_CABAL_EXPF+=" src_configure" ;;
73 *) ;;
74 esac
75
76 EXPORT_FUNCTIONS ${HASKELL_CABAL_EXPF}
77
78 for feature in ${CABAL_FEATURES}; do
79 case ${feature} in
80 haddock) CABAL_USE_HADDOCK=yes;;
81 hscolour) CABAL_USE_HSCOLOUR=yes;;
82 hoogle) CABAL_USE_HOOGLE=yes;;
83 alex) CABAL_USE_ALEX=yes;;
84 happy) CABAL_USE_HAPPY=yes;;
85 c2hs) CABAL_USE_C2HS=yes;;
86 cpphs) CABAL_USE_CPPHS=yes;;
87 profile) CABAL_USE_PROFILE=yes;;
88 bootstrap) CABAL_BOOTSTRAP=yes;;
89 bin) CABAL_HAS_BINARIES=yes;;
90 lib) CABAL_HAS_LIBRARIES=yes;;
91 nocabaldep) CABAL_FROM_GHC=yes;;
92 test-suite) CABAL_TEST_SUITE=yes;;
93 *) CABAL_UNKNOWN="${CABAL_UNKNOWN} ${feature}";;
94 esac
95 done
96
97 if [[ -n "${CABAL_USE_HADDOCK}" ]]; then
98 IUSE="${IUSE} doc"
99 # don't require depend on itself to build docs.
100 # ebuild bootstraps docs from just built binary
101 [[ ${CATEGORY}/${PN} = "dev-haskell/haddock" ]] || DEPEND="${DEPEND} doc? ( dev-haskell/haddock )"
102 fi
103
104 if [[ -n "${CABAL_USE_HSCOLOUR}" ]]; then
105 IUSE="${IUSE} hscolour"
106 DEPEND="${DEPEND} hscolour? ( dev-haskell/hscolour )"
107 fi
108
109 if [[ -n "${CABAL_USE_ALEX}" ]]; then
110 DEPEND="${DEPEND} dev-haskell/alex"
111 fi
112
113 if [[ -n "${CABAL_USE_HAPPY}" ]]; then
114 DEPEND="${DEPEND} dev-haskell/happy"
115 fi
116
117 if [[ -n "${CABAL_USE_C2HS}" ]]; then
118 DEPEND="${DEPEND} dev-haskell/c2hs"
119 fi
120
121 if [[ -n "${CABAL_USE_CPPHS}" ]]; then
122 DEPEND="${DEPEND} dev-haskell/cpphs"
123 fi
124
125 if [[ -n "${CABAL_USE_PROFILE}" ]]; then
126 IUSE="${IUSE} profile"
127 fi
128
129 if [[ -n "${CABAL_TEST_SUITE}" ]]; then
130 IUSE="${IUSE} test"
131 fi
132
133 # We always use a standalone version of Cabal, rather than the one that comes
134 # with GHC. But of course we can't depend on cabal when building cabal itself.
135 if [[ -z ${CABAL_MIN_VERSION} ]]; then
136 CABAL_MIN_VERSION=1.1.4
137 fi
138 if [[ -z "${CABAL_BOOTSTRAP}" && -z "${CABAL_FROM_GHC}" ]]; then
139 DEPEND="${DEPEND} >=dev-haskell/cabal-${CABAL_MIN_VERSION}"
140 fi
141
142 # returns the version of cabal currently in use
143 _CABAL_VERSION_CACHE=""
144 cabal-version() {
145 if [[ -z "${_CABAL_VERSION_CACHE}" ]]; then
146 if [[ "${CABAL_BOOTSTRAP}" ]]; then
147 # We're bootstrapping cabal, so the cabal version is the version
148 # of this package itself.
149 _CABAL_VERSION_CACHE="${PV}"
150 elif [[ "${CABAL_FROM_GHC}" ]]; then
151 local cabal_package=$(echo "$(ghc-libdir)"/Cabal-*)
152 # /path/to/ghc/Cabal-${VER} -> ${VER}
153 _CABAL_VERSION_CACHE="${cabal_package/*Cabal-/}"
154 else
155 # We ask portage, not ghc, so that we only pick up
156 # portage-installed cabal versions.
157 _CABAL_VERSION_CACHE="$(ghc-extractportageversion dev-haskell/cabal)"
158 fi
159 fi
160 echo "${_CABAL_VERSION_CACHE}"
161 }
162
163 cabal-bootstrap() {
164 local setupmodule
165 local cabalpackage
166 if [[ -f "${S}/Setup.lhs" ]]; then
167 setupmodule="${S}/Setup.lhs"
168 elif [[ -f "${S}/Setup.hs" ]]; then
169 setupmodule="${S}/Setup.hs"
170 else
171 die "No Setup.lhs or Setup.hs found"
172 fi
173
174 if [[ -z "${CABAL_BOOTSTRAP}" && -z "${CABAL_FROM_GHC}" ]] && ! ghc-sanecabal "${CABAL_MIN_VERSION}"; then
175 eerror "The package dev-haskell/cabal is not correctly installed for"
176 eerror "the currently active version of ghc ($(ghc-version)). Please"
177 eerror "run haskell-updater or re-build dev-haskell/cabal."
178 die "cabal is not correctly installed"
179 fi
180
181 # We build the setup program using the latest version of
182 # cabal that we have installed
183 cabalpackage=Cabal-$(cabal-version)
184 einfo "Using cabal-$(cabal-version)."
185
186 make_setup() {
187 set -- -package "${cabalpackage}" --make "${setupmodule}" \
188 ${HCFLAGS} \
189 ${GHC_BOOTSTRAP_FLAGS} \
190 "$@" \
191 -o setup
192 echo $(ghc-getghc) "$@"
193 $(ghc-getghc) "$@"
194 }
195 if $(ghc-supports-shared-libraries); then
196 # # some custom build systems might use external libraries,
197 # # for which we don't have shared libs, so keep static fallback
198 # bug #411789, http://hackage.haskell.org/trac/ghc/ticket/5743#comment:3
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; } ||
211 make_setup "$@" || die "compiling ${setupmodule} failed"
212 else
213 make_setup "$@" || die "compiling ${setupmodule} failed"
214 fi
215 }
216
217 cabal-mksetup() {
218 local setupdir=${1:-${S}}
219 local setup_src=${setupdir}/Setup.hs
220
221 rm -vf "${setupdir}"/Setup.{lhs,hs}
222 elog "Creating 'Setup.hs' for 'Simple' build type."
223
224 echo 'import Distribution.Simple; main = defaultMainWithHooks defaultUserHooks' \
225 > "${setup_src}" || die "failed to create default Setup.hs"
226 }
227
228 cabal-hscolour() {
229 set -- hscolour "$@"
230 echo ./setup "$@"
231 ./setup "$@" || die "setup hscolour failed"
232 }
233
234 cabal-haddock() {
235 set -- haddock "$@"
236 echo ./setup "$@"
237 ./setup "$@" || die "setup haddock failed"
238 }
239
240 cabal-hscolour-haddock() {
241 # --hyperlink-source implies calling 'setup hscolour'
242 set -- haddock --hyperlink-source
243 echo ./setup "$@"
244 ./setup "$@" --hyperlink-source || die "setup haddock --hyperlink-source failed"
245 }
246
247 cabal-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
256 cabal-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
268 cabal-show-old() {
269 cabal-die-if-nonempty 'outdated' \
270 $("${EPREFIX}"/usr/sbin/haskell-updater --quiet --upgrade --list-only)
271 }
272
273 cabal-show-brokens-and-die() {
274 cabal-show-brokens
275 cabal-show-old
276
277 die "$@"
278 }
279
280 cabal-configure() {
281 local cabalconf=()
282 has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
283
284 if [[ -n "${CABAL_USE_HADDOCK}" ]] && use doc; then
285 cabalconf+=(--with-haddock=${EPREFIX}/usr/bin/haddock)
286 fi
287 if [[ -n "${CABAL_USE_PROFILE}" ]] && use profile; then
288 cabalconf+=(--enable-library-profiling)
289 fi
290 if [[ -n "${CABAL_USE_ALEX}" ]]; then
291 cabalconf+=(--with-alex=${EPREFIX}/usr/bin/alex)
292 fi
293
294 if [[ -n "${CABAL_USE_HAPPY}" ]]; then
295 cabalconf+=(--with-happy=${EPREFIX}/usr/bin/happy)
296 fi
297
298 if [[ -n "${CABAL_USE_C2HS}" ]]; then
299 cabalconf+=(--with-c2hs=${EPREFIX}/usr/bin/c2hs)
300 fi
301 if [[ -n "${CABAL_USE_CPPHS}" ]]; then
302 cabalconf+=(--with-cpphs=${EPREFIX}/usr/bin/cpphs)
303 fi
304 if [[ -n "${CABAL_TEST_SUITE}" ]]; then
305 cabalconf+=($(use_enable test tests))
306 fi
307
308 local option
309 for option in ${HCFLAGS}
310 do
311 cabalconf+=(--ghc-option="$option")
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
325
326 # Building GHCi libs on ppc64 causes "TOC overflow".
327 if use ppc64; then
328 cabalconf+=(--disable-library-for-ghci)
329 fi
330
331 # currently cabal does not respect CFLAGS and LDFLAGS on it's own (bug #333217)
332 # so translate LDFLAGS to ghc parameters (without filtering)
333 local flag
334 for flag in $LDFLAGS; do cabalconf+=(--ghc-option="-optl$flag"); done
335
336 # disable executable stripping for the executables, as portage will
337 # strip by itself, and pre-stripping gives a QA warning.
338 # cabal versions previous to 1.4 does not strip executables, and does
339 # not accept the flag.
340 # this fixes numerous bugs, amongst them;
341 # bug #251881, bug #251882, bug #251884, bug #251886, bug #299494
342 cabalconf+=(--disable-executable-stripping)
343
344 cabalconf+=(--docdir="${EPREFIX}"/usr/share/doc/${PF})
345 # As of Cabal 1.2, configure is quite quiet. For diagnostic purposes
346 # it's better if the configure chatter is in the build logs:
347 cabalconf+=(--verbose)
348
349 # We build shared version of our Cabal where ghc ships it's shared
350 # version of it. We will link ./setup as dynamic binary againt Cabal later.
351 [[ ${CATEGORY}/${PN} == "dev-haskell/cabal" ]] && \
352 $(ghc-supports-shared-libraries) && \
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
371
372 set -- configure \
373 --ghc --prefix="${EPREFIX}"/usr \
374 --with-compiler="$(ghc-getghc)" \
375 --with-hc-pkg="$(ghc-getghcpkg)" \
376 --prefix="${EPREFIX}"/usr \
377 --libdir="${EPREFIX}"/usr/$(get_libdir) \
378 --libsubdir=${P}/ghc-$(ghc-version) \
379 --datadir="${EPREFIX}"/usr/share/ \
380 --datasubdir=${P}/ghc-$(ghc-version) \
381 "${cabalconf[@]}" \
382 ${CABAL_CONFIGURE_FLAGS} \
383 ${CABAL_EXTRA_CONFIGURE_FLAGS} \
384 "$@"
385 echo ./setup "$@"
386 ./setup "$@" || cabal-show-brokens-and-die "setup configure failed"
387 }
388
389 cabal-build() {
390 set -- build ${CABAL_EXTRA_BUILD_FLAGS} "$@"
391 echo ./setup "$@"
392 ./setup "$@" \
393 || die "setup build failed"
394 }
395
396 cabal-copy() {
397 has "${EAPI:-0}" 0 1 2 && ! use prefix && ED=${D}
398
399 set -- copy --destdir="${D}" "$@"
400 echo ./setup "$@"
401 ./setup "$@" || die "setup copy failed"
402
403 # cabal is a bit eager about creating dirs,
404 # so remove them if they are empty
405 rmdir "${ED}/usr/bin" 2> /dev/null
406 }
407
408 cabal-pkg() {
409 # This does not actually register since we're using true instead
410 # of ghc-pkg. So it just leaves the .conf file and we can
411 # register that ourselves (if it exists).
412
413 if [[ -n ${CABAL_HAS_LIBRARIES} ]]; then
414 # Newer cabal can generate a package conf for us:
415 ./setup register --gen-pkg-config="${T}/${P}.conf"
416 ghc-setup-pkg "${T}/${P}.conf"
417 ghc-install-pkg
418 fi
419 }
420
421 # Some cabal libs are bundled along with some versions of ghc
422 # eg filepath-1.0 comes with ghc-6.6.1
423 # by putting CABAL_CORE_LIB_GHC_PV="6.6.1" in an ebuild we are declaring that
424 # when building with this version of ghc, the ebuild is a dummy that is it will
425 # install no files since the package is already included with ghc.
426 # However portage still records the dependency and we can upgrade the package
427 # to a later one that's not included with ghc.
428 # You can also put a space separated list, eg CABAL_CORE_LIB_GHC_PV="6.6 6.6.1".
429 cabal-is-dummy-lib() {
430 for version in ${CABAL_CORE_LIB_GHC_PV[*]}; do
431 [[ "$(ghc-version)" == ${version} ]] && return 0
432 done
433 return 1
434 }
435
436 # exported function: check if cabal is correctly installed for
437 # the currently active ghc (we cannot guarantee this with portage)
438 haskell-cabal_pkg_setup() {
439 if [[ -n ${CABAL_HAS_LIBRARIES} ]]; then
440 [[ ${RDEPEND} == *dev-lang/ghc* ]] || eqawarn "QA Notice: A library does not have runtime dependency on dev-lang/ghc."
441 fi
442 if [[ -z "${CABAL_HAS_BINARIES}" ]] && [[ -z "${CABAL_HAS_LIBRARIES}" ]]; then
443 eqawarn "QA Notice: Neither bin nor lib are in CABAL_FEATURES."
444 fi
445 if [[ -n "${CABAL_UNKNOWN}" ]]; then
446 eqawarn "QA Notice: Unknown entry in CABAL_FEATURES: ${CABAL_UNKNOWN}"
447 fi
448 if cabal-is-dummy-lib; then
449 einfo "${P} is included in ghc-${CABAL_CORE_LIB_GHC_PV}, nothing to install."
450 fi
451 }
452
453 haskell-cabal_src_configure() {
454 cabal-is-dummy-lib && return
455
456 pushd "${S}" > /dev/null
457
458 cabal-bootstrap
459
460 cabal-configure "$@"
461
462 popd > /dev/null
463 }
464
465 # exported function: nice alias
466 cabal_src_configure() {
467 haskell-cabal_src_configure "$@"
468 }
469
470 # exported function: cabal-style bootstrap configure and compile
471 cabal_src_compile() {
472 # it's a common mistake when one bumps ebuild to EAPI="2" (and upper)
473 # and forgets to separate src_compile() to src_configure()/src_compile().
474 # Such error leads to default src_configure and we lose all passed flags.
475 if ! has "${EAPI:-0}" 0 1; then
476 local passed_flag
477 for passed_flag in "$@"; do
478 [[ ${passed_flag} == --flags=* ]] && \
479 eqawarn "QA Notice: Cabal option '${passed_flag}' has effect only in src_configure()"
480 done
481 fi
482
483 cabal-is-dummy-lib && return
484
485 has src_configure ${HASKELL_CABAL_EXPF} || haskell-cabal_src_configure "$@"
486 cabal-build
487
488 if [[ -n "${CABAL_USE_HADDOCK}" ]] && use doc; then
489 if [[ -n "${CABAL_USE_HSCOLOUR}" ]] && use hscolour; then
490 # hscolour and haddock
491 cabal-hscolour-haddock
492 else
493 # just haddock
494 cabal-haddock
495 fi
496 else
497 if [[ -n "${CABAL_USE_HSCOLOUR}" ]] && use hscolour; then
498 # just hscolour
499 cabal-hscolour
500 fi
501 fi
502 }
503
504 haskell-cabal_src_compile() {
505 pushd "${S}" > /dev/null
506
507 cabal_src_compile "$@"
508
509 popd > /dev/null
510 }
511
512 haskell-cabal_src_test() {
513 pushd "${S}" > /dev/null
514
515 if cabal-is-dummy-lib; then
516 einfo ">>> No tests for dummy library: ${CATEGORY}/${PF}"
517 else
518 einfo ">>> Test phase [cabal test]: ${CATEGORY}/${PF}"
519 set -- test "$@"
520 echo ./setup "$@"
521 ./setup "$@" || die "cabal test failed"
522 fi
523
524 popd > /dev/null
525 }
526
527 # exported function: cabal-style copy and register
528 cabal_src_install() {
529 has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
530
531 if ! cabal-is-dummy-lib; then
532 cabal-copy
533 cabal-pkg
534 fi
535
536 # create a dummy local package conf file for haskell-updater
537 # if it does not exist (dummy libraries and binaries w/o libraries)
538 local ghc_confdir_with_prefix="$(ghc-confdir)"
539 # remove EPREFIX
540 dodir ${ghc_confdir_with_prefix#${EPREFIX}}
541 local conf_file="${D}/$(ghc-confdir)/$(ghc-localpkgconf)"
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 ${initial_pkg_db}."
557 die
558 fi
559 done
560 done
561 fi
562 }
563
564 haskell-cabal_src_install() {
565 pushd "${S}" > /dev/null
566
567 cabal_src_install
568
569 popd > /dev/null
570 }
571
572 # @FUNCTION: cabal_flag
573 # @DESCRIPTION:
574 # ebuild.sh:use_enable() taken as base
575 #
576 # Usage examples:
577 #
578 # CABAL_CONFIGURE_FLAGS=$(cabal_flag gui)
579 # leads to "--flags=gui" or "--flags=-gui" (useflag 'gui')
580 #
581 # CABAL_CONFIGURE_FLAGS=$(cabal_flag gtk gui)
582 # also leads to "--flags=gui" or " --flags=-gui" (useflag 'gtk')
583 #
584 cabal_flag() {
585 if [[ -z "$1" ]]; then
586 echo "!!! cabal_flag() called without a parameter." >&2
587 echo "!!! cabal_flag() <USEFLAG> [<cabal_flagname>]" >&2
588 return 1
589 fi
590
591 local UWORD=${2:-$1}
592
593 if use "$1"; then
594 echo "--flags=${UWORD}"
595 else
596 echo "--flags=-${UWORD}"
597 fi
598
599 return 0
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}/${MY_PN}-tools.cabal cabal_chdeps \
623 # 'base == 3.*' 'base >= 4.2 && < 4.7'
624 #}
625 #
626 cabal_chdeps() {
627 local cabal_fn=${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()
674 replace-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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