/[gentoo-x86]/eclass/ghc-package.eclass
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Revision 1.31 - (show annotations) (download)
Mon Aug 22 04:46:31 2011 UTC (3 years, 3 months ago) by vapier
Branch: MAIN
Changes since 1.30: +3 -4 lines
fix random bugs in eclass documentation, and convert to new @AUTHOR tag

1 # Copyright 1999-2011 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/ghc-package.eclass,v 1.30 2011/05/08 15:00:43 slyfox Exp $
4
5 # @ECLASS: ghc-package.eclass
6 # @MAINTAINER:
7 # "Gentoo's Haskell Language team" <haskell@gentoo.org>
8 # @AUTHOR:
9 # Original Author: Andres Loeh <kosmikus@gentoo.org>
10 # @BLURB: This eclass helps with the Glasgow Haskell Compiler's package configuration utility.
11 # @DESCRIPTION:
12 # Helper eclass to handle ghc installation/upgrade/deinstallation process.
13
14 inherit versionator
15
16 # @FUNCTION: ghc-getghc
17 # @DESCRIPTION:
18 # returns the name of the ghc executable
19 ghc-getghc() {
20 type -P ghc
21 }
22
23 # @FUNCTION: ghc-getghcpkg
24 # @DESCRIPTION:
25 # Internal function determines returns the name of the ghc-pkg executable
26 ghc-getghcpkg() {
27 type -P ghc-pkg
28 }
29
30 # @FUNCTION: ghc-getghcpkgbin
31 # @DESCRIPTION:
32 # returns the name of the ghc-pkg binary (ghc-pkg
33 # itself usually is a shell script, and we have to
34 # bypass the script under certain circumstances);
35 # for Cabal, we add an empty global package config file,
36 # because for some reason the global package file
37 # must be specified
38 ghc-getghcpkgbin() {
39 if version_is_at_least "6.10" "$(ghc-version)"; then
40 # the ghc-pkg executable changed name in ghc 6.10, as it no longer needs
41 # the wrapper script with the static flags
42 echo '[]' > "${T}/empty.conf"
43 echo "$(ghc-libdir)/ghc-pkg" "--global-conf=${T}/empty.conf"
44 elif ghc-cabal; then
45 echo '[]' > "${T}/empty.conf"
46 echo "$(ghc-libdir)/ghc-pkg.bin" "--global-conf=${T}/empty.conf"
47 else
48 echo "$(ghc-libdir)/ghc-pkg.bin"
49 fi
50 }
51
52 # @FUNCTION: ghc-version
53 # @DESCRIPTION:
54 # returns the version of ghc
55 _GHC_VERSION_CACHE=""
56 ghc-version() {
57 if [[ -z "${_GHC_VERSION_CACHE}" ]]; then
58 _GHC_VERSION_CACHE="$($(ghc-getghc) --numeric-version)"
59 fi
60 echo "${_GHC_VERSION_CACHE}"
61 }
62
63 # @FUNCTION: ghc-cabal
64 # @DESCRIPTION:
65 # this function can be used to determine if ghc itself
66 # uses the Cabal package format; it has nothing to do
67 # with the Cabal libraries ... ghc uses the Cabal package
68 # format since version 6.4
69 ghc-cabal() {
70 version_is_at_least "6.4" "$(ghc-version)"
71 }
72
73 # @FUNCTION: ghc-bestcabalversion
74 # @DESCRIPTION:
75 # return the best version of the Cabal library that is available
76 ghc-bestcabalversion() {
77 local cabalversion
78 if ghc-cabal; then
79 # We ask portage, not ghc, so that we only pick up
80 # portage-installed cabal versions.
81 cabalversion="$(ghc-extractportageversion dev-haskell/cabal)"
82 echo "Cabal-${cabalversion}"
83 else
84 # older ghc's don't support package versioning
85 echo Cabal
86 fi
87 }
88
89 # @FUNCTION: ghc-sanecabal
90 # @DESCRIPTION:
91 # check if a standalone Cabal version is available for the
92 # currently used ghc; takes minimal version of Cabal as
93 # an optional argument
94 ghc-sanecabal() {
95 local f
96 local version
97 if [[ -z "$1" ]]; then version="1.0.1"; else version="$1"; fi
98 for f in $(ghc-confdir)/cabal-*; do
99 [[ -f "${f}" ]] && version_is_at_least "${version}" "${f#*cabal-}" && return
100 done
101 return 1
102 }
103
104 # @FUNCTION: ghc-saneghc
105 # @DESCRIPTION:
106 # checks if ghc and ghc-bin are installed in the same version
107 # (if they're both installed); if this is not the case, we
108 # unfortunately cannot trust portage's dependency resolution
109 ghc-saneghc() {
110 local ghcversion
111 local ghcbinversion
112 if [[ "${PN}" == "ghc" || "${PN}" == "ghc-bin" ]]; then
113 return
114 fi
115 if has_version dev-lang/ghc && has_version dev-lang/ghc-bin; then
116 ghcversion="$(ghc-extractportageversion dev-lang/ghc)"
117 ghcbinversion="$(ghc-extractportageversion dev-lang/ghc-bin)"
118 if [[ "${ghcversion}" != "${ghcbinversion}" ]]; then
119 return 1
120 fi
121 fi
122 return
123 }
124
125 # @FUNCTION: ghc-supports-shared-libraries
126 # @DESCRIPTION:
127 # checks if ghc is built with support for building
128 # shared libraries (aka '-dynamic' option)
129 ghc-supports-shared-libraries() {
130 $(ghc-getghc) --info | grep "RTS ways" | grep -q "dyn"
131 }
132
133 # @FUNCTION: ghc-extractportageversion
134 # @DESCRIPTION:
135 # extract the version of a portage-installed package
136 ghc-extractportageversion() {
137 local pkg
138 local version
139 pkg="$(best_version $1)"
140 version="${pkg#$1-}"
141 version="${version%-r*}"
142 version="${version%_pre*}"
143 echo "${version}"
144 }
145
146 # @FUNCTION: ghc-libdir
147 # @DESCRIPTION:
148 # returns the library directory
149 _GHC_LIBDIR_CACHE=""
150 ghc-libdir() {
151 if [[ -z "${_GHC_LIBDIR_CACHE}" ]]; then
152 _GHC_LIBDIR_CACHE="$($(ghc-getghc) --print-libdir)"
153 fi
154 echo "${_GHC_LIBDIR_CACHE}"
155 }
156
157 # @FUNCTION: ghc-confdir
158 # @DESCRIPTION:
159 # returns the (Gentoo) library configuration directory
160 ghc-confdir() {
161 echo "$(ghc-libdir)/gentoo"
162 }
163
164 # @FUNCTION: ghc-localpkgconf
165 # @DESCRIPTION:
166 # returns the name of the local (package-specific)
167 # package configuration file
168 ghc-localpkgconf() {
169 echo "${PF}.conf"
170 }
171
172 # @FUNCTION: ghc-makeghcilib
173 # @DESCRIPTION:
174 # make a ghci foo.o file from a libfoo.a file
175 ghc-makeghcilib() {
176 local outfile
177 outfile="$(dirname $1)/$(basename $1 | sed 's:^lib\?\(.*\)\.a$:\1.o:')"
178 ld --relocatable --discard-all --output="${outfile}" --whole-archive "$1"
179 }
180
181 # @FUNCTION: ghc-makeghcilib
182 # @DESCRIPTION:
183 # tests if a ghc package exists
184 ghc-package-exists() {
185 local describe_flag
186 if version_is_at_least "6.4" "$(ghc-version)"; then
187 describe_flag="describe"
188 else
189 describe_flag="--show-package"
190 fi
191
192 $(ghc-getghcpkg) "${describe_flag}" "$1" > /dev/null 2>&1
193 }
194
195 # @FUNCTION: ghc-setup-pkg
196 # @DESCRIPTION:
197 # creates a local (package-specific) package
198 # configuration file; the arguments should be
199 # uninstalled package description files, each
200 # containing a single package description; if
201 # no arguments are given, the resulting file is
202 # empty
203 ghc-setup-pkg() {
204 local localpkgconf
205 localpkgconf="${S}/$(ghc-localpkgconf)"
206 echo '[]' > "${localpkgconf}"
207 local update_flag
208 if version_is_at_least "6.4" "$(ghc-version)"; then
209 update_flag="update -"
210 else
211 update_flag="--update-package"
212 fi
213 for pkg in $*; do
214 $(ghc-getghcpkgbin) -f "${localpkgconf}" ${update_flag} --force \
215 < "${pkg}" || die "failed to register ${pkg}"
216 done
217 }
218
219 # @FUNCTION: ghc-fixlibpath
220 # @DESCRIPTION:
221 # fixes the library and import directories path
222 # of the package configuration file
223 ghc-fixlibpath() {
224 sed -i "s|$1|$(ghc-libdir)|g" "${S}/$(ghc-localpkgconf)"
225 if [[ -n "$2" ]]; then
226 sed -i "s|$2|$(ghc-libdir)/imports|g" "${S}/$(ghc-localpkgconf)"
227 fi
228 }
229
230 # @FUNCTION: ghc-install-pkg
231 # @DESCRIPTION:
232 # moves the local (package-specific) package configuration
233 # file to its final destination
234 ghc-install-pkg() {
235 mkdir -p "${D}/$(ghc-confdir)"
236 cat "${S}/$(ghc-localpkgconf)" | sed "s|${D}||g" \
237 > "${D}/$(ghc-confdir)/$(ghc-localpkgconf)"
238 }
239
240 # @FUNCTION: ghc-register-pkg
241 # @DESCRIPTION:
242 # registers all packages in the local (package-specific)
243 # package configuration file
244 ghc-register-pkg() {
245 local localpkgconf
246 localpkgconf="$(ghc-confdir)/$1"
247 local update_flag
248 local describe_flag
249 if version_is_at_least "6.4" "$(ghc-version)"; then
250 update_flag="update -"
251 describe_flag="describe"
252 else
253 update_flag="--update-package"
254 describe_flag="--show-package"
255 fi
256 if [[ -f "${localpkgconf}" ]]; then
257 for pkg in $(ghc-listpkg "${localpkgconf}"); do
258 ebegin "Registering ${pkg} "
259 $(ghc-getghcpkgbin) -f "${localpkgconf}" "${describe_flag}" "${pkg}" \
260 | $(ghc-getghcpkg) ${update_flag} --force > /dev/null
261 eend $?
262 done
263 fi
264 }
265
266 # @FUNCTION: ghc-reregister
267 # @DESCRIPTION:
268 # re-adds all available .conf files to the global
269 # package conf file, to be used on a ghc reinstallation
270 ghc-reregister() {
271 has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
272 einfo "Re-adding packages (may cause several harmless warnings) ..."
273 PATH="${EPREFIX}/usr/bin:${PATH}" CONFDIR="$(ghc-confdir)"
274 if [ -d "${CONFDIR}" ]; then
275 pushd "${CONFDIR}" > /dev/null
276 for conf in *.conf; do
277 PATH="${EPREFIX}/usr/bin:${PATH}" ghc-register-pkg "${conf}"
278 done
279 popd > /dev/null
280 fi
281 }
282
283 # @FUNCTION: ghc-unregister-pkg
284 # @DESCRIPTION:
285 # unregisters a package configuration file
286 # protected are all packages that are still contained in
287 # another package configuration file
288 ghc-unregister-pkg() {
289 local localpkgconf
290 local i
291 local pkg
292 local unregister_flag
293 localpkgconf="$(ghc-confdir)/$1"
294
295 if version_is_at_least "6.4" "$(ghc-version)"; then
296 unregister_flag="unregister"
297 else
298 unregister_flag="--remove-package"
299 fi
300
301 if [[ -f "${localpkgconf}" ]]; then
302 for pkg in $(ghc-reverse "$(ghc-listpkg ${localpkgconf})"); do
303 if ! ghc-package-exists "${pkg}"; then
304 einfo "Package ${pkg} is not installed for ghc-$(ghc-version)."
305 else
306 ebegin "Unregistering ${pkg} "
307 $(ghc-getghcpkg) "${unregister_flag}" "${pkg}" --force > /dev/null
308 eend $?
309 fi
310 done
311 fi
312 }
313
314 # @FUNCTION: ghc-reverse
315 # @DESCRIPTION:
316 # help-function: reverse a list
317 ghc-reverse() {
318 local result
319 local i
320 for i in $1; do
321 result="${i} ${result}"
322 done
323 echo "${result}"
324 }
325
326 # @FUNCTION: ghc-elem
327 # @DESCRIPTION:
328 # help-function: element-check
329 ghc-elem() {
330 local i
331 for i in $2; do
332 [[ "$1" == "${i}" ]] && return 0
333 done
334 return 1
335 }
336
337 # @FUNCTION: ghc-listpkg
338 # @DESCRIPTION:
339 # show the packages in a package configuration file
340 ghc-listpkg() {
341 local ghcpkgcall
342 local i
343 local extra_flags
344 if version_is_at_least '6.12.3' "$(ghc-version)"; then
345 extra_flags="${extra_flags} -v0"
346 fi
347 for i in $*; do
348 if ghc-cabal; then
349 echo $($(ghc-getghcpkg) list ${extra_flags} -f "${i}") \
350 | sed \
351 -e "s|^.*${i}:\([^:]*\).*$|\1|" \
352 -e "s|/.*$||" \
353 -e "s|,| |g" -e "s|[(){}]||g"
354 else
355 echo $($(ghc-getghcpkgbin) -l -f "${i}") \
356 | cut -f2 -d':' \
357 | sed 's:,: :g'
358 fi
359 done
360 }
361
362 # @FUNCTION: ghc-package_pkg_setup
363 # @DESCRIPTION:
364 # exported function: check if we have a consistent ghc installation
365 ghc-package_pkg_setup() {
366 if ! ghc-saneghc; then
367 eerror "You have inconsistent versions of dev-lang/ghc and dev-lang/ghc-bin"
368 eerror "installed. Portage currently cannot work correctly with this setup."
369 eerror "There are several possibilities to work around this problem:"
370 eerror "(1) Up/downgrade ghc-bin to the same version as ghc."
371 eerror "(2) Unmerge ghc-bin."
372 eerror "(3) Unmerge ghc."
373 eerror "You probably want option 1 or 2."
374 die "Inconsistent versions of ghc and ghc-bin."
375 fi
376 }
377
378 # @FUNCTION: ghc-package_pkg_postinst
379 # @DESCRIPTION:
380 # exported function: registers the package-specific package
381 # configuration file
382 ghc-package_pkg_postinst() {
383 ghc-register-pkg "$(ghc-localpkgconf)"
384 }
385
386 # @FUNCTION: ghc-package_pkg_prerm
387 # @DESCRIPTION:
388 # exported function: unregisters the package-specific package
389 # configuration file; a package contained therein is unregistered
390 # only if it the same package is not also contained in another
391 # package configuration file ...
392 ghc-package_pkg_prerm() {
393 ghc-unregister-pkg "$(ghc-localpkgconf)"
394 }
395
396 EXPORT_FUNCTIONS pkg_setup pkg_postinst pkg_prerm

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