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Revision 1.42 - (show annotations) (download)
Wed Nov 20 09:19:19 2013 UTC (8 months, 1 week ago) by slyfox
Branch: MAIN
Changes since 1.41: +23 -1 lines
Added 'replace-hcflags()'. Filters HCFLAGS.

1 # Copyright 1999-2013 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 1.41 2013/07/29 12:31:35 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
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 : ${CABAL_DEBUG_LOOSENING:=}
63
64 HASKELL_CABAL_EXPF="pkg_setup src_compile src_test src_install"
65
66 case "${EAPI:-0}" in
67 2|3|4|5) HASKELL_CABAL_EXPF+=" src_configure" ;;
68 *) ;;
69 esac
70
71 EXPORT_FUNCTIONS ${HASKELL_CABAL_EXPF}
72
73 for feature in ${CABAL_FEATURES}; do
74 case ${feature} in
75 haddock) CABAL_USE_HADDOCK=yes;;
76 hscolour) CABAL_USE_HSCOLOUR=yes;;
77 hoogle) CABAL_USE_HOOGLE=yes;;
78 alex) CABAL_USE_ALEX=yes;;
79 happy) CABAL_USE_HAPPY=yes;;
80 c2hs) CABAL_USE_C2HS=yes;;
81 cpphs) CABAL_USE_CPPHS=yes;;
82 profile) CABAL_USE_PROFILE=yes;;
83 bootstrap) CABAL_BOOTSTRAP=yes;;
84 bin) CABAL_HAS_BINARIES=yes;;
85 lib) CABAL_HAS_LIBRARIES=yes;;
86 nocabaldep) CABAL_FROM_GHC=yes;;
87 test-suite) CABAL_TEST_SUITE=yes;;
88 *) CABAL_UNKNOWN="${CABAL_UNKNOWN} ${feature}";;
89 esac
90 done
91
92 if [[ -n "${CABAL_USE_HADDOCK}" ]]; then
93 IUSE="${IUSE} doc"
94 # don't require depend on itself to build docs.
95 # ebuild bootstraps docs from just built binary
96 [[ ${CATEGORY}/${PN} = "dev-haskell/haddock" ]] || DEPEND="${DEPEND} doc? ( dev-haskell/haddock )"
97 fi
98
99 if [[ -n "${CABAL_USE_HSCOLOUR}" ]]; then
100 IUSE="${IUSE} hscolour"
101 DEPEND="${DEPEND} hscolour? ( dev-haskell/hscolour )"
102 fi
103
104 if [[ -n "${CABAL_USE_ALEX}" ]]; then
105 DEPEND="${DEPEND} dev-haskell/alex"
106 fi
107
108 if [[ -n "${CABAL_USE_HAPPY}" ]]; then
109 DEPEND="${DEPEND} dev-haskell/happy"
110 fi
111
112 if [[ -n "${CABAL_USE_C2HS}" ]]; then
113 DEPEND="${DEPEND} dev-haskell/c2hs"
114 fi
115
116 if [[ -n "${CABAL_USE_CPPHS}" ]]; then
117 DEPEND="${DEPEND} dev-haskell/cpphs"
118 fi
119
120 if [[ -n "${CABAL_USE_PROFILE}" ]]; then
121 IUSE="${IUSE} profile"
122 fi
123
124 if [[ -n "${CABAL_TEST_SUITE}" ]]; then
125 IUSE="${IUSE} test"
126 fi
127
128 # We always use a standalone version of Cabal, rather than the one that comes
129 # with GHC. But of course we can't depend on cabal when building cabal itself.
130 if [[ -z ${CABAL_MIN_VERSION} ]]; then
131 CABAL_MIN_VERSION=1.1.4
132 fi
133 if [[ -z "${CABAL_BOOTSTRAP}" && -z "${CABAL_FROM_GHC}" ]]; then
134 DEPEND="${DEPEND} >=dev-haskell/cabal-${CABAL_MIN_VERSION}"
135 fi
136
137 # returns the version of cabal currently in use
138 _CABAL_VERSION_CACHE=""
139 cabal-version() {
140 if [[ -z "${_CABAL_VERSION_CACHE}" ]]; then
141 if [[ "${CABAL_BOOTSTRAP}" ]]; then
142 # We're bootstrapping cabal, so the cabal version is the version
143 # of this package itself.
144 _CABAL_VERSION_CACHE="${PV}"
145 elif [[ "${CABAL_FROM_GHC}" ]]; then
146 local cabal_package=$(echo "$(ghc-libdir)"/Cabal-*)
147 # /path/to/ghc/Cabal-${VER} -> ${VER}
148 _CABAL_VERSION_CACHE="${cabal_package/*Cabal-/}"
149 else
150 # We ask portage, not ghc, so that we only pick up
151 # portage-installed cabal versions.
152 _CABAL_VERSION_CACHE="$(ghc-extractportageversion dev-haskell/cabal)"
153 fi
154 fi
155 echo "${_CABAL_VERSION_CACHE}"
156 }
157
158 cabal-bootstrap() {
159 local setupmodule
160 local cabalpackage
161 if [[ -f "${S}/Setup.lhs" ]]; then
162 setupmodule="${S}/Setup.lhs"
163 elif [[ -f "${S}/Setup.hs" ]]; then
164 setupmodule="${S}/Setup.hs"
165 else
166 die "No Setup.lhs or Setup.hs found"
167 fi
168
169 if [[ -z "${CABAL_BOOTSTRAP}" && -z "${CABAL_FROM_GHC}" ]] && ! ghc-sanecabal "${CABAL_MIN_VERSION}"; then
170 eerror "The package dev-haskell/cabal is not correctly installed for"
171 eerror "the currently active version of ghc ($(ghc-version)). Please"
172 eerror "run haskell-updater or re-build dev-haskell/cabal."
173 die "cabal is not correctly installed"
174 fi
175
176 # We build the setup program using the latest version of
177 # cabal that we have installed
178 cabalpackage=Cabal-$(cabal-version)
179 einfo "Using cabal-$(cabal-version)."
180
181 make_setup() {
182 set -- -package "${cabalpackage}" --make "${setupmodule}" \
183 ${GHC_BOOTSTRAP_FLAGS} \
184 "$@" \
185 -o setup
186 echo $(ghc-getghc) ${HCFLAGS} "$@"
187 $(ghc-getghc) "$@"
188 }
189 if $(ghc-supports-shared-libraries); then
190 # # some custom build systems might use external libraries,
191 # # for which we don't have shared libs, so keep static fallback
192 # bug #411789, http://hackage.haskell.org/trac/ghc/ticket/5743#comment:3
193 # http://hackage.haskell.org/trac/ghc/ticket/7062
194 # http://hackage.haskell.org/trac/ghc/ticket/3072
195 # ghc does not set RPATH for extralibs, thus we do it ourselves by hands
196 einfo "Prepending $(ghc-libdir) to LD_LIBRARY_PATH"
197 if [[ ${CHOST} != *-darwin* ]]; then
198 LD_LIBRARY_PATH="$(ghc-libdir)${LD_LIBRARY_PATH:+:}${LD_LIBRARY_PATH}"
199 export LD_LIBRARY_PATH
200 else
201 DYLD_LIBRARY_PATH="$(ghc-libdir)${DYLD_LIBRARY_PATH:+:}${DYLD_LIBRARY_PATH}"
202 export DYLD_LIBRARY_PATH
203 fi
204 { make_setup -dynamic "$@" && ./setup --help >/dev/null; } ||
205 make_setup "$@" || die "compiling ${setupmodule} failed"
206 else
207 make_setup "$@" || die "compiling ${setupmodule} failed"
208 fi
209 }
210
211 cabal-mksetup() {
212 local setupdir
213
214 if [[ -n $1 ]]; then
215 setupdir=$1
216 else
217 setupdir=${S}
218 fi
219
220 rm -f "${setupdir}"/Setup.{lhs,hs}
221
222 echo 'import Distribution.Simple; main = defaultMainWithHooks defaultUserHooks' \
223 > $setupdir/Setup.hs || die "failed to create default Setup.hs"
224 }
225
226 cabal-hscolour() {
227 set -- hscolour "$@"
228 echo ./setup "$@"
229 ./setup "$@" || die "setup hscolour failed"
230 }
231
232 cabal-haddock() {
233 set -- haddock "$@"
234 echo ./setup "$@"
235 ./setup "$@" || die "setup haddock failed"
236 }
237
238 cabal-hscolour-haddock() {
239 # --hyperlink-source implies calling 'setup hscolour'
240 set -- haddock --hyperlink-source
241 echo ./setup "$@"
242 ./setup "$@" --hyperlink-source || die "setup haddock --hyperlink-source failed"
243 }
244
245 cabal-die-if-nonempty() {
246 local breakage_type=$1
247 shift
248
249 [[ "${#@}" == 0 ]] && return 0
250 eerror "Detected ${breakage_type} packages: ${@}"
251 die "//==-- Please, run 'haskell-updater' to fix ${breakage_type} packages --==//"
252 }
253
254 cabal-show-brokens() {
255 # pretty-printer
256 $(ghc-getghcpkg) check 2>&1 \
257 | egrep -v '^Warning: haddock-(html|interfaces): ' \
258 | egrep -v '^Warning: include-dirs: '
259
260 cabal-die-if-nonempty 'broken' \
261 $($(ghc-getghcpkg) check --simple-output)
262 }
263
264 cabal-show-old() {
265 cabal-die-if-nonempty 'outdated' \
266 $("${EPREFIX}"/usr/sbin/haskell-updater --quiet --upgrade --list-only)
267 }
268
269 cabal-show-brokens-and-die() {
270 cabal-show-brokens
271 cabal-show-old
272
273 die "$@"
274 }
275
276 cabal-configure() {
277 has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
278
279 if [[ -n "${CABAL_USE_HADDOCK}" ]] && use doc; then
280 cabalconf="${cabalconf} --with-haddock=${EPREFIX}/usr/bin/haddock"
281 fi
282 if [[ -n "${CABAL_USE_PROFILE}" ]] && use profile; then
283 cabalconf="${cabalconf} --enable-library-profiling"
284 fi
285 if [[ -n "${CABAL_USE_ALEX}" ]]; then
286 cabalconf="${cabalconf} --with-alex=${EPREFIX}/usr/bin/alex"
287 fi
288
289 if [[ -n "${CABAL_USE_HAPPY}" ]]; then
290 cabalconf="${cabalconf} --with-happy=${EPREFIX}/usr/bin/happy"
291 fi
292
293 if [[ -n "${CABAL_USE_C2HS}" ]]; then
294 cabalconf="${cabalconf} --with-c2hs=${EPREFIX}/usr/bin/c2hs"
295 fi
296 if [[ -n "${CABAL_USE_CPPHS}" ]]; then
297 cabalconf="${cabalconf} --with-cpphs=${EPREFIX}/usr/bin/cpphs"
298 fi
299 if [[ -n "${CABAL_TEST_SUITE}" ]]; then
300 cabalconf="${cabalconf} $(use_enable test tests)"
301 fi
302
303 local option
304 for option in ${HCFLAGS}
305 do
306 cabalconf+=" --ghc-option=$option"
307 done
308
309 # Building GHCi libs on ppc64 causes "TOC overflow".
310 if use ppc64; then
311 cabalconf="${cabalconf} --disable-library-for-ghci"
312 fi
313
314 # currently cabal does not respect CFLAGS and LDFLAGS on it's own (bug #333217)
315 # so translate LDFLAGS to ghc parameters (without filtering)
316 local flag
317 for flag in $LDFLAGS; do cabalconf="${cabalconf} --ghc-option=-optl$flag"; done
318
319 # disable executable stripping for the executables, as portage will
320 # strip by itself, and pre-stripping gives a QA warning.
321 # cabal versions previous to 1.4 does not strip executables, and does
322 # not accept the flag.
323 # this fixes numerous bugs, amongst them;
324 # bug #251881, bug #251882, bug #251884, bug #251886, bug #299494
325 cabalconf="${cabalconf} --disable-executable-stripping"
326
327 cabalconf="${cabalconf} --docdir=${EPREFIX}/usr/share/doc/${PF}"
328 # As of Cabal 1.2, configure is quite quiet. For diagnostic purposes
329 # it's better if the configure chatter is in the build logs:
330 cabalconf="${cabalconf} --verbose"
331
332 # We build shared version of our Cabal where ghc ships it's shared
333 # version of it. We will link ./setup as dynamic binary againt Cabal later.
334 [[ ${CATEGORY}/${PN} == "dev-haskell/cabal" ]] && \
335 $(ghc-supports-shared-libraries) && \
336 cabalconf="${cabalconf} --enable-shared"
337
338 if $(ghc-supports-shared-libraries); then
339 # maybe a bit lower
340 if $(ghc-supports-dynamic-by-default); then
341 cabalconf="${cabalconf} --enable-shared"
342 fi
343 fi
344
345 set -- configure \
346 --ghc --prefix="${EPREFIX}"/usr \
347 --with-compiler="$(ghc-getghc)" \
348 --with-hc-pkg="$(ghc-getghcpkg)" \
349 --prefix="${EPREFIX}"/usr \
350 --libdir="${EPREFIX}"/usr/$(get_libdir) \
351 --libsubdir=${P}/ghc-$(ghc-version) \
352 --datadir="${EPREFIX}"/usr/share/ \
353 --datasubdir=${P}/ghc-$(ghc-version) \
354 ${cabalconf} \
355 ${CABAL_CONFIGURE_FLAGS} \
356 ${CABAL_EXTRA_CONFIGURE_FLAGS} \
357 "$@"
358 echo ./setup "$@"
359 ./setup "$@" || cabal-show-brokens-and-die "setup configure failed"
360 }
361
362 cabal-build() {
363 unset LANG LC_ALL LC_MESSAGES
364 set -- build ${CABAL_EXTRA_BUILD_FLAGS} "$@"
365 echo ./setup "$@"
366 ./setup "$@" \
367 || die "setup build failed"
368 }
369
370 cabal-copy() {
371 has "${EAPI:-0}" 0 1 2 && ! use prefix && ED=${D}
372
373 set -- copy --destdir="${D}" "$@"
374 echo ./setup "$@"
375 ./setup "$@" || die "setup copy failed"
376
377 # cabal is a bit eager about creating dirs,
378 # so remove them if they are empty
379 rmdir "${ED}/usr/bin" 2> /dev/null
380 }
381
382 cabal-pkg() {
383 # This does not actually register since we're using true instead
384 # of ghc-pkg. So it just leaves the .conf file and we can
385 # register that ourselves (if it exists).
386
387 if [[ -n ${CABAL_HAS_LIBRARIES} ]]; then
388 # Newer cabal can generate a package conf for us:
389 ./setup register --gen-pkg-config="${T}/${P}.conf"
390 ghc-setup-pkg "${T}/${P}.conf"
391 ghc-install-pkg
392 fi
393 }
394
395 # Some cabal libs are bundled along with some versions of ghc
396 # eg filepath-1.0 comes with ghc-6.6.1
397 # by putting CABAL_CORE_LIB_GHC_PV="6.6.1" in an ebuild we are declaring that
398 # when building with this version of ghc, the ebuild is a dummy that is it will
399 # install no files since the package is already included with ghc.
400 # However portage still records the dependency and we can upgrade the package
401 # to a later one that's not included with ghc.
402 # You can also put a space separated list, eg CABAL_CORE_LIB_GHC_PV="6.6 6.6.1".
403 cabal-is-dummy-lib() {
404 for version in ${CABAL_CORE_LIB_GHC_PV[*]}; do
405 [[ "$(ghc-version)" == ${version} ]] && return 0
406 done
407 return 1
408 }
409
410 # exported function: check if cabal is correctly installed for
411 # the currently active ghc (we cannot guarantee this with portage)
412 haskell-cabal_pkg_setup() {
413 if [[ -n ${CABAL_HAS_LIBRARIES} ]]; then
414 [[ ${RDEPEND} == *dev-lang/ghc* ]] || eqawarn "QA Notice: A library does not have runtime dependency on dev-lang/ghc."
415 fi
416 if [[ -z "${CABAL_HAS_BINARIES}" ]] && [[ -z "${CABAL_HAS_LIBRARIES}" ]]; then
417 eqawarn "QA Notice: Neither bin nor lib are in CABAL_FEATURES."
418 fi
419 if [[ -n "${CABAL_UNKNOWN}" ]]; then
420 eqawarn "QA Notice: Unknown entry in CABAL_FEATURES: ${CABAL_UNKNOWN}"
421 fi
422 if cabal-is-dummy-lib; then
423 einfo "${P} is included in ghc-${CABAL_CORE_LIB_GHC_PV}, nothing to install."
424 fi
425 }
426
427 haskell-cabal_src_configure() {
428 cabal-is-dummy-lib && return
429
430 pushd "${S}" > /dev/null
431
432 cabal-bootstrap
433
434 cabal-configure "$@"
435
436 popd > /dev/null
437 }
438
439 # exported function: nice alias
440 cabal_src_configure() {
441 haskell-cabal_src_configure "$@"
442 }
443
444 # exported function: cabal-style bootstrap configure and compile
445 cabal_src_compile() {
446 # it's a common mistake when one bumps ebuild to EAPI="2" (and upper)
447 # and forgets to separate src_compile() to src_configure()/src_compile().
448 # Such error leads to default src_configure and we lose all passed flags.
449 if ! has "${EAPI:-0}" 0 1; then
450 local passed_flag
451 for passed_flag in "$@"; do
452 [[ ${passed_flag} == --flags=* ]] && \
453 eqawarn "QA Notice: Cabal option '${passed_flag}' has effect only in src_configure()"
454 done
455 fi
456
457 cabal-is-dummy-lib && return
458
459 has src_configure ${HASKELL_CABAL_EXPF} || haskell-cabal_src_configure "$@"
460 cabal-build
461
462 if [[ -n "${CABAL_USE_HADDOCK}" ]] && use doc; then
463 if [[ -n "${CABAL_USE_HSCOLOUR}" ]] && use hscolour; then
464 # hscolour and haddock
465 cabal-hscolour-haddock
466 else
467 # just haddock
468 cabal-haddock
469 fi
470 else
471 if [[ -n "${CABAL_USE_HSCOLOUR}" ]] && use hscolour; then
472 # just hscolour
473 cabal-hscolour
474 fi
475 fi
476 }
477
478 haskell-cabal_src_compile() {
479 pushd "${S}" > /dev/null
480
481 cabal_src_compile "$@"
482
483 popd > /dev/null
484 }
485
486 haskell-cabal_src_test() {
487 pushd "${S}" > /dev/null
488
489 if cabal-is-dummy-lib; then
490 einfo ">>> No tests for dummy library: ${CATEGORY}/${PF}"
491 else
492 einfo ">>> Test phase [cabal test]: ${CATEGORY}/${PF}"
493 set -- test "$@"
494 echo ./setup "$@"
495 ./setup "$@" || die "cabal test failed"
496 fi
497
498 popd > /dev/null
499 }
500
501 # exported function: cabal-style copy and register
502 cabal_src_install() {
503 has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
504
505 if ! cabal-is-dummy-lib; then
506 cabal-copy
507 cabal-pkg
508 fi
509
510 # create a dummy local package conf file for haskell-updater
511 # if it does not exist (dummy libraries and binaries w/o libraries)
512 local ghc_confdir_with_prefix="$(ghc-confdir)"
513 # remove EPREFIX
514 dodir ${ghc_confdir_with_prefix#${EPREFIX}}
515 local conf_file="${D}/$(ghc-confdir)/$(ghc-localpkgconf)"
516 [[ -e $conf_file ]] || echo '[]' > "$conf_file" || die
517
518 # make sure installed packages do not destroy ghc's
519 # bundled packages
520 local initial_pkg_db=${ROOT}/$(ghc-libdir)/package.conf.d.initial
521 if [[ -e ${initial_pkg_db} ]]; then
522 local checked_pkg
523 for checked_pkg in $(ghc-listpkg "${conf_file}")
524 do
525 local initial_pkg
526 for initial_pkg in $(ghc-listpkg "${initial_pkg_db}"); do
527 if [[ ${checked_pkg} = ${initial_pkg} ]]; then
528 eerror "Package ${checked_pkg} is shipped with $(ghc-version)."
529 eerror "Ebuild author forgot CABAL_CORE_LIB_GHC_PV entry."
530 eerror "Found in ${initial_pkg_db}."
531 die
532 fi
533 done
534 done
535 fi
536 }
537
538 haskell-cabal_src_install() {
539 pushd "${S}" > /dev/null
540
541 cabal_src_install
542
543 popd > /dev/null
544 }
545
546 # @FUNCTION: cabal_flag
547 # @DESCRIPTION:
548 # ebuild.sh:use_enable() taken as base
549 #
550 # Usage examples:
551 #
552 # CABAL_CONFIGURE_FLAGS=$(cabal_flag gui)
553 # leads to "--flags=gui" or "--flags=-gui" (useflag 'gui')
554 #
555 # CABAL_CONFIGURE_FLAGS=$(cabal_flag gtk gui)
556 # also leads to "--flags=gui" or " --flags=-gui" (useflag 'gtk')
557 #
558 cabal_flag() {
559 if [[ -z "$1" ]]; then
560 echo "!!! cabal_flag() called without a parameter." >&2
561 echo "!!! cabal_flag() <USEFLAG> [<cabal_flagname>]" >&2
562 return 1
563 fi
564
565 local UWORD=${2:-$1}
566
567 if use "$1"; then
568 echo "--flags=${UWORD}"
569 else
570 echo "--flags=-${UWORD}"
571 fi
572
573 return 0
574 }
575
576 # @FUNCTION: cabal_chdeps
577 # @DESCRIPTION:
578 # Allows easier patching of $CABAL_FILE (${S}/${PN}.cabal by default)
579 # depends
580 #
581 # Accepts argument list as pairs of substitutions: <from-string> <to-string>...
582 #
583 # Dies on error.
584 #
585 # Usage examples:
586 #
587 # src_prepare() {
588 # cabal_chdeps \
589 # 'base >= 4.2 && < 4.6' 'base >= 4.2 && < 4.7' \
590 # 'containers ==0.4.*' 'containers >= 0.4 && < 0.6'
591 #}
592 # or
593 # src_prepare() {
594 # CABAL_FILE=${S}/${MY_PN}.cabal cabal_chdeps \
595 # 'base >= 4.2 && < 4.6' 'base >= 4.2 && < 4.7'
596 # CABAL_FILE=${S}/${MY_PN}-tools.cabal cabal_chdeps \
597 # 'base == 3.*' 'base >= 4.2 && < 4.7'
598 #}
599 #
600 cabal_chdeps() {
601 local cf=${CABAL_FILE:-${S}/${PN}.cabal}
602 local from_ss # ss - substring
603 local to_ss
604 local orig_c # c - contents
605 local new_c
606
607 [[ -f $cf ]] || die "cabal file '$cf' does not exist"
608
609 orig_c=$(< "$cf")
610
611 while :; do
612 from_pat=$1
613 to_str=$2
614
615 [[ -n ${from_pat} ]] || break
616 [[ -n ${to_str} ]] || die "'${from_str}' does not have 'to' part"
617
618 einfo "CHDEP: '${from_pat}' -> '${to_str}'"
619
620 # escape pattern-like symbols
621 from_pat=${from_pat//\*/\\*}
622 from_pat=${from_pat//\[/\\[}
623
624 new_c=${orig_c//${from_pat}/${to_str}}
625
626 if [[ -n $CABAL_DEBUG_LOOSENING ]]; then
627 echo "${orig_c}" >"${T}/${cf}".pre
628 echo "${new_c}" >"${T}/${cf}".post
629 diff -u "${T}/${cf}".{pre,post}
630 fi
631
632 [[ "${orig_c}" == "${new_c}" ]] && die "no trigger for '${from_pat}'"
633 orig_c=${new_c}
634 shift
635 shift
636 done
637
638 echo "${new_c}" > "$cf" ||
639 die "failed to update"
640 }
641
642 # @FUNCTION: replace-hcflags
643 # @USAGE: <old> <new>
644 # @DESCRIPTION:
645 # Replace the <old> flag with <new> in HCFLAGS. Accepts shell globs for <old>.
646 # The implementation is picked from flag-o-matic.eclass:replace-flags()
647 replace-hcflags() {
648 [[ $# != 2 ]] && die "Usage: replace-hcflags <old flag> <new flag>"
649
650 local f new=()
651 for f in ${HCFLAGS} ; do
652 # Note this should work with globs like -O*
653 if [[ ${f} == ${1} ]]; then
654 einfo "HCFLAGS: replacing '${f}' to '${2}'"
655 f=${2}
656 fi
657 new+=( "${f}" )
658 done
659 export HCFLAGS="${new[*]}"
660
661 return 0
662 }

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