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Revision 1.39 - (show annotations) (download)
Sun Apr 28 16:15:33 2013 UTC (14 months, 2 weeks ago) by zmedico
Branch: MAIN
Changes since 1.38: +4 -4 lines
Bug #467646 - Refer to /etc/portage/make.conf, not /etc/make.conf.

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 1.38 2013/01/06 13:06:35 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 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 "$@" --hyperlink-source || die "setup haddock --hyperlink-source failed"
243 }
244
245 cabal-configure() {
246 has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
247
248 if [[ -n "${CABAL_USE_HADDOCK}" ]] && use doc; then
249 cabalconf="${cabalconf} --with-haddock=${EPREFIX}/usr/bin/haddock"
250 fi
251 if [[ -n "${CABAL_USE_PROFILE}" ]] && use profile; then
252 cabalconf="${cabalconf} --enable-library-profiling"
253 fi
254 if [[ -n "${CABAL_USE_ALEX}" ]]; then
255 cabalconf="${cabalconf} --with-alex=${EPREFIX}/usr/bin/alex"
256 fi
257
258 if [[ -n "${CABAL_USE_HAPPY}" ]]; then
259 cabalconf="${cabalconf} --with-happy=${EPREFIX}/usr/bin/happy"
260 fi
261
262 if [[ -n "${CABAL_USE_C2HS}" ]]; then
263 cabalconf="${cabalconf} --with-c2hs=${EPREFIX}/usr/bin/c2hs"
264 fi
265 if [[ -n "${CABAL_USE_CPPHS}" ]]; then
266 cabalconf="${cabalconf} --with-cpphs=${EPREFIX}/usr/bin/cpphs"
267 fi
268 if [[ -n "${CABAL_TEST_SUITE}" ]]; then
269 cabalconf="${cabalconf} $(use_enable test tests)"
270 fi
271
272 local option
273 for option in ${HCFLAGS}
274 do
275 cabalconf+=" --ghc-option=$option"
276 done
277
278 # Building GHCi libs on ppc64 causes "TOC overflow".
279 if use ppc64; then
280 cabalconf="${cabalconf} --disable-library-for-ghci"
281 fi
282
283 # currently cabal does not respect CFLAGS and LDFLAGS on it's own (bug #333217)
284 # so translate LDFLAGS to ghc parameters (without filtering)
285 local flag
286 for flag in $LDFLAGS; do cabalconf="${cabalconf} --ghc-option=-optl$flag"; done
287
288 # disable executable stripping for the executables, as portage will
289 # strip by itself, and pre-stripping gives a QA warning.
290 # cabal versions previous to 1.4 does not strip executables, and does
291 # not accept the flag.
292 # this fixes numerous bugs, amongst them;
293 # bug #251881, bug #251882, bug #251884, bug #251886, bug #299494
294 cabalconf="${cabalconf} --disable-executable-stripping"
295
296 cabalconf="${cabalconf} --docdir=${EPREFIX}/usr/share/doc/${PF}"
297 # As of Cabal 1.2, configure is quite quiet. For diagnostic purposes
298 # it's better if the configure chatter is in the build logs:
299 cabalconf="${cabalconf} --verbose"
300
301 # We build shared version of our Cabal where ghc ships it's shared
302 # version of it. We will link ./setup as dynamic binary againt Cabal later.
303 [[ ${CATEGORY}/${PN} == "dev-haskell/cabal" ]] && \
304 $(ghc-supports-shared-libraries) && \
305 cabalconf="${cabalconf} --enable-shared"
306
307 if $(ghc-supports-shared-libraries); then
308 # maybe a bit lower
309 if version_is_at_least "7.7.20121114" "$(ghc-version)"; then
310 cabalconf="${cabalconf} --enable-shared"
311 fi
312 fi
313
314 set -- configure \
315 --ghc --prefix="${EPREFIX}"/usr \
316 --with-compiler="$(ghc-getghc)" \
317 --with-hc-pkg="$(ghc-getghcpkg)" \
318 --prefix="${EPREFIX}"/usr \
319 --libdir="${EPREFIX}"/usr/$(get_libdir) \
320 --libsubdir=${P}/ghc-$(ghc-version) \
321 --datadir="${EPREFIX}"/usr/share/ \
322 --datasubdir=${P}/ghc-$(ghc-version) \
323 ${cabalconf} \
324 ${CABAL_CONFIGURE_FLAGS} \
325 ${CABAL_EXTRA_CONFIGURE_FLAGS} \
326 "$@"
327 echo ./setup "$@"
328 ./setup "$@" || die "setup configure failed"
329 }
330
331 cabal-build() {
332 unset LANG LC_ALL LC_MESSAGES
333 set -- build ${CABAL_EXTRA_BUILD_FLAGS} "$@"
334 echo ./setup "$@"
335 ./setup "$@" \
336 || die "setup build failed"
337 }
338
339 cabal-copy() {
340 has "${EAPI:-0}" 0 1 2 && ! use prefix && ED=${D}
341
342 set -- copy --destdir="${D}" "$@"
343 echo ./setup "$@"
344 ./setup "$@" || die "setup copy failed"
345
346 # cabal is a bit eager about creating dirs,
347 # so remove them if they are empty
348 rmdir "${ED}/usr/bin" 2> /dev/null
349 }
350
351 cabal-pkg() {
352 # This does not actually register since we're using true instead
353 # of ghc-pkg. So it just leaves the .conf file and we can
354 # register that ourselves (if it exists).
355
356 if [[ -n ${CABAL_HAS_LIBRARIES} ]]; then
357 # Newer cabal can generate a package conf for us:
358 ./setup register --gen-pkg-config="${T}/${P}.conf"
359 ghc-setup-pkg "${T}/${P}.conf"
360 ghc-install-pkg
361 fi
362 }
363
364 # Some cabal libs are bundled along with some versions of ghc
365 # eg filepath-1.0 comes with ghc-6.6.1
366 # by putting CABAL_CORE_LIB_GHC_PV="6.6.1" in an ebuild we are declaring that
367 # when building with this version of ghc, the ebuild is a dummy that is it will
368 # install no files since the package is already included with ghc.
369 # However portage still records the dependency and we can upgrade the package
370 # to a later one that's not included with ghc.
371 # You can also put a space separated list, eg CABAL_CORE_LIB_GHC_PV="6.6 6.6.1".
372 cabal-is-dummy-lib() {
373 for version in ${CABAL_CORE_LIB_GHC_PV[*]}; do
374 [[ "$(ghc-version)" == ${version} ]] && return 0
375 done
376 return 1
377 }
378
379 # exported function: check if cabal is correctly installed for
380 # the currently active ghc (we cannot guarantee this with portage)
381 haskell-cabal_pkg_setup() {
382 if [[ -n ${CABAL_HAS_LIBRARIES} ]]; then
383 [[ ${RDEPEND} == *dev-lang/ghc* ]] || eqawarn "QA Notice: A library does not have runtime dependency on dev-lang/ghc."
384 fi
385 if [[ -z "${CABAL_HAS_BINARIES}" ]] && [[ -z "${CABAL_HAS_LIBRARIES}" ]]; then
386 eqawarn "QA Notice: Neither bin nor lib are in CABAL_FEATURES."
387 fi
388 if [[ -n "${CABAL_UNKNOWN}" ]]; then
389 eqawarn "QA Notice: Unknown entry in CABAL_FEATURES: ${CABAL_UNKNOWN}"
390 fi
391 if cabal-is-dummy-lib; then
392 einfo "${P} is included in ghc-${CABAL_CORE_LIB_GHC_PV}, nothing to install."
393 fi
394 }
395
396 haskell-cabal_src_configure() {
397 cabal-is-dummy-lib && return
398
399 pushd "${S}" > /dev/null
400
401 cabal-bootstrap
402
403 cabal-configure "$@"
404
405 popd > /dev/null
406 }
407
408 # exported function: nice alias
409 cabal_src_configure() {
410 haskell-cabal_src_configure "$@"
411 }
412
413 # exported function: cabal-style bootstrap configure and compile
414 cabal_src_compile() {
415 # it's a common mistake when one bumps ebuild to EAPI="2" (and upper)
416 # and forgets to separate src_compile() to src_configure()/src_compile().
417 # Such error leads to default src_configure and we lose all passed flags.
418 if ! has "${EAPI:-0}" 0 1; then
419 local passed_flag
420 for passed_flag in "$@"; do
421 [[ ${passed_flag} == --flags=* ]] && \
422 eqawarn "QA Notice: Cabal option '${passed_flag}' has effect only in src_configure()"
423 done
424 fi
425
426 cabal-is-dummy-lib && return
427
428 has src_configure ${HASKELL_CABAL_EXPF} || haskell-cabal_src_configure "$@"
429 cabal-build
430
431 if [[ -n "${CABAL_USE_HADDOCK}" ]] && use doc; then
432 if [[ -n "${CABAL_USE_HSCOLOUR}" ]] && use hscolour; then
433 # hscolour and haddock
434 cabal-hscolour-haddock
435 else
436 # just haddock
437 cabal-haddock
438 fi
439 else
440 if [[ -n "${CABAL_USE_HSCOLOUR}" ]] && use hscolour; then
441 # just hscolour
442 cabal-hscolour
443 fi
444 fi
445 }
446
447 haskell-cabal_src_compile() {
448 pushd "${S}" > /dev/null
449
450 cabal_src_compile "$@"
451
452 popd > /dev/null
453 }
454
455 haskell-cabal_src_test() {
456 pushd "${S}" > /dev/null
457
458 if cabal-is-dummy-lib; then
459 einfo ">>> No tests for dummy library: ${CATEGORY}/${PF}"
460 else
461 einfo ">>> Test phase [cabal test]: ${CATEGORY}/${PF}"
462 set -- test "$@"
463 echo ./setup "$@"
464 ./setup "$@" || die "cabal test failed"
465 fi
466
467 popd > /dev/null
468 }
469
470 # exported function: cabal-style copy and register
471 cabal_src_install() {
472 has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
473
474 if ! cabal-is-dummy-lib; then
475 cabal-copy
476 cabal-pkg
477 fi
478
479 # create a dummy local package conf file for haskell-updater
480 # if it does not exist (dummy libraries and binaries w/o libraries)
481 local ghc_confdir_with_prefix="$(ghc-confdir)"
482 # remove EPREFIX
483 dodir ${ghc_confdir_with_prefix#${EPREFIX}}
484 local conf_file="${D}/$(ghc-confdir)/$(ghc-localpkgconf)"
485 [[ -e $conf_file ]] || echo '[]' > "$conf_file" || die
486
487 # make sure installed packages do not destroy ghc's
488 # bundled packages
489 local initial_pkg_db=${ROOT}/$(ghc-libdir)/package.conf.d.initial
490 if [[ -e ${initial_pkg_db} ]]; then
491 local checked_pkg
492 for checked_pkg in $(ghc-listpkg "${conf_file}")
493 do
494 local initial_pkg
495 for initial_pkg in $(ghc-listpkg "${initial_pkg_db}"); do
496 if [[ ${checked_pkg} = ${initial_pkg} ]]; then
497 eerror "Package ${checked_pkg} is shipped with $(ghc-version)."
498 eerror "Ebuild author forgot CABAL_CORE_LIB_GHC_PV entry."
499 eerror "Found in ${initial_pkg_db}."
500 die
501 fi
502 done
503 done
504 fi
505 }
506
507 haskell-cabal_src_install() {
508 pushd "${S}" > /dev/null
509
510 cabal_src_install
511
512 popd > /dev/null
513 }
514
515 # @FUNCTION: cabal_flag
516 # @DESCRIPTION:
517 # ebuild.sh:use_enable() taken as base
518 #
519 # Usage examples:
520 #
521 # CABAL_CONFIGURE_FLAGS=$(cabal_flag gui)
522 # leads to "--flags=gui" or "--flags=-gui" (useflag 'gui')
523 #
524 # CABAL_CONFIGURE_FLAGS=$(cabal_flag gtk gui)
525 # also leads to "--flags=gui" or " --flags=-gui" (useflag 'gtk')
526 #
527 cabal_flag() {
528 if [[ -z "$1" ]]; then
529 echo "!!! cabal_flag() called without a parameter." >&2
530 echo "!!! cabal_flag() <USEFLAG> [<cabal_flagname>]" >&2
531 return 1
532 fi
533
534 local UWORD=${2:-$1}
535
536 if use "$1"; then
537 echo "--flags=${UWORD}"
538 else
539 echo "--flags=-${UWORD}"
540 fi
541
542 return 0
543 }
544
545 # @FUNCTION: cabal_chdeps
546 # @DESCRIPTION:
547 # Allows easier patching of $CABAL_FILE (${S}/${PN}.cabal by default)
548 # depends
549 #
550 # Accepts argument list as pairs of substitutions: <from-string> <to-string>...
551 #
552 # Dies on error.
553 #
554 # Usage examples:
555 #
556 # src_prepare() {
557 # cabal_chdeps \
558 # 'base >= 4.2 && < 4.6' 'base >= 4.2 && < 4.7' \
559 # 'containers ==0.4.*' 'containers >= 0.4 && < 0.6'
560 #}
561 # or
562 # src_prepare() {
563 # CABAL_FILE=${S}/${MY_PN}.cabal cabal_chdeps \
564 # 'base >= 4.2 && < 4.6' 'base >= 4.2 && < 4.7'
565 # CABAL_FILE=${S}/${MY_PN}-tools.cabal cabal_chdeps \
566 # 'base == 3.*' 'base >= 4.2 && < 4.7'
567 #}
568 #
569 cabal_chdeps() {
570 local cf=${CABAL_FILE:-${S}/${PN}.cabal}
571 local from_ss # ss - substring
572 local to_ss
573 local orig_c # c - contents
574 local new_c
575
576 [[ -f $cf ]] || die "cabal file '$cf' does not exist"
577
578 orig_c=$(< "$cf")
579
580 while :; do
581 from_pat=$1
582 to_str=$2
583
584 [[ -n ${from_pat} ]] || break
585 [[ -n ${to_str} ]] || die "'${from_str}' does not have 'to' part"
586
587 einfo "CHDEP: '${from_pat}' -> '${to_str}'"
588
589 # escape pattern-like symbols
590 from_pat=${from_pat//\*/\\*}
591 from_pat=${from_pat//\[/\\[}
592
593 new_c=${orig_c//${from_pat}/${to_str}}
594
595 if [[ -n $CABAL_DEBUG_LOOSENING ]]; then
596 echo "${orig_c}" >"${T}/${cf}".pre
597 echo "${new_c}" >"${T}/${cf}".post
598 diff -u "${T}/${cf}".{pre,post}
599 fi
600
601 [[ "${orig_c}" == "${new_c}" ]] && die "no trigger for '${from_pat}'"
602 orig_c=${new_c}
603 shift
604 shift
605 done
606
607 echo "${new_c}" > "$cf" ||
608 die "failed to update"
609 }

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