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Revision 1.29 - (show annotations) (download)
Sun Mar 13 20:12:13 2011 UTC (3 years, 1 month ago) by slyfox
Branch: MAIN
Changes since 1.28: +66 -13 lines
Added EPREFIX support, added documentation stubs.

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 1.9 2005/04/08 01:13:39 araujo Exp $
4 #
5 # @ECLASS: ghc-package.eclass
6 # @MAINTAINER:
7 # "Gentoo's Haskell Language team" <haskell@gentoo.org>
8 #
9 # Original Author: Andres Loeh <kosmikus@gentoo.org>
10 #
11 # @BLURB: This eclass helps with the Glasgow Haskell Compiler's package configuration utility.
12 # @DESCRIPTION:
13 # Helper eclass to handle ghc installation/upgrade/deinstallation process.
14
15 inherit versionator
16
17 # @FUNCTION: ghc-getghc
18 # @DESCRIPTION:
19 # returns the name of the ghc executable
20 ghc-getghc() {
21 type -P ghc
22 }
23
24 # @FUNCTION: ghc-getghcpkg
25 # @DESCRIPTION:
26 # Internal function determines returns the name of the ghc-pkg executable
27 ghc-getghcpkg() {
28 type -P ghc-pkg
29 }
30
31 # @FUNCTION: ghc-getghcpkgbin
32 # @DESCRIPTION:
33 # returns the name of the ghc-pkg binary (ghc-pkg
34 # itself usually is a shell script, and we have to
35 # bypass the script under certain circumstances);
36 # for Cabal, we add an empty global package config file,
37 # because for some reason the global package file
38 # must be specified
39 ghc-getghcpkgbin() {
40 if version_is_at_least "6.10" "$(ghc-version)"; then
41 # the ghc-pkg executable changed name in ghc 6.10, as it no longer needs
42 # the wrapper script with the static flags
43 echo '[]' > "${T}/empty.conf"
44 echo "$(ghc-libdir)/ghc-pkg" "--global-conf=${T}/empty.conf"
45 elif ghc-cabal; then
46 echo '[]' > "${T}/empty.conf"
47 echo "$(ghc-libdir)/ghc-pkg.bin" "--global-conf=${T}/empty.conf"
48 else
49 echo "$(ghc-libdir)/ghc-pkg.bin"
50 fi
51 }
52
53 # @FUNCTION: ghc-version
54 # @DESCRIPTION:
55 # returns the version of ghc
56 _GHC_VERSION_CACHE=""
57 ghc-version() {
58 if [[ -z "${_GHC_VERSION_CACHE}" ]]; then
59 _GHC_VERSION_CACHE="$($(ghc-getghc) --numeric-version)"
60 fi
61 echo "${_GHC_VERSION_CACHE}"
62 }
63
64 # @FUNCTION: ghc-cabal
65 # @DESCRIPTION:
66 # this function can be used to determine if ghc itself
67 # uses the Cabal package format; it has nothing to do
68 # with the Cabal libraries ... ghc uses the Cabal package
69 # format since version 6.4
70 ghc-cabal() {
71 version_is_at_least "6.4" "$(ghc-version)"
72 }
73
74 # @FUNCTION: ghc-bestcabalversion
75 # @DESCRIPTION:
76 # return the best version of the Cabal library that is available
77 ghc-bestcabalversion() {
78 local cabalversion
79 if ghc-cabal; then
80 # We ask portage, not ghc, so that we only pick up
81 # portage-installed cabal versions.
82 cabalversion="$(ghc-extractportageversion dev-haskell/cabal)"
83 echo "Cabal-${cabalversion}"
84 else
85 # older ghc's don't support package versioning
86 echo Cabal
87 fi
88 }
89
90 # @FUNCTION: ghc-sanecabal
91 # @DESCRIPTION:
92 # check if a standalone Cabal version is available for the
93 # currently used ghc; takes minimal version of Cabal as
94 # an optional argument
95 ghc-sanecabal() {
96 local f
97 local version
98 if [[ -z "$1" ]]; then version="1.0.1"; else version="$1"; fi
99 for f in $(ghc-confdir)/cabal-*; do
100 [[ -f "${f}" ]] && version_is_at_least "${version}" "${f#*cabal-}" && return
101 done
102 return 1
103 }
104
105 # @FUNCTION: ghc-saneghc
106 # @DESCRIPTION:
107 # checks if ghc and ghc-bin are installed in the same version
108 # (if they're both installed); if this is not the case, we
109 # unfortunately cannot trust portage's dependency resolution
110 ghc-saneghc() {
111 local ghcversion
112 local ghcbinversion
113 if [[ "${PN}" == "ghc" || "${PN}" == "ghc-bin" ]]; then
114 return
115 fi
116 if has_version dev-lang/ghc && has_version dev-lang/ghc-bin; then
117 ghcversion="$(ghc-extractportageversion dev-lang/ghc)"
118 ghcbinversion="$(ghc-extractportageversion dev-lang/ghc-bin)"
119 if [[ "${ghcversion}" != "${ghcbinversion}" ]]; then
120 return 1
121 fi
122 fi
123 return
124 }
125
126 # @FUNCTION: ghc-extractportageversion
127 # @DESCRIPTION:
128 # extract the version of a portage-installed package
129 ghc-extractportageversion() {
130 local pkg
131 local version
132 pkg="$(best_version $1)"
133 version="${pkg#$1-}"
134 version="${version%-r*}"
135 version="${version%_pre*}"
136 echo "${version}"
137 }
138
139 # @FUNCTION: ghc-libdir
140 # @DESCRIPTION:
141 # returns the library directory
142 _GHC_LIBDIR_CACHE=""
143 ghc-libdir() {
144 if [[ -z "${_GHC_LIBDIR_CACHE}" ]]; then
145 _GHC_LIBDIR_CACHE="$($(ghc-getghc) --print-libdir)"
146 fi
147 echo "${_GHC_LIBDIR_CACHE}"
148 }
149
150 # @FUNCTION: ghc-confdir
151 # @DESCRIPTION:
152 # returns the (Gentoo) library configuration directory
153 ghc-confdir() {
154 echo "$(ghc-libdir)/gentoo"
155 }
156
157 # @FUNCTION: ghc-localpkgconf
158 # @DESCRIPTION:
159 # returns the name of the local (package-specific)
160 # package configuration file
161 ghc-localpkgconf() {
162 echo "${PF}.conf"
163 }
164
165 # @FUNCTION: ghc-makeghcilib
166 # @DESCRIPTION:
167 # make a ghci foo.o file from a libfoo.a file
168 ghc-makeghcilib() {
169 local outfile
170 outfile="$(dirname $1)/$(basename $1 | sed 's:^lib\?\(.*\)\.a$:\1.o:')"
171 ld --relocatable --discard-all --output="${outfile}" --whole-archive "$1"
172 }
173
174 # @FUNCTION: ghc-makeghcilib
175 # @DESCRIPTION:
176 # tests if a ghc package exists
177 ghc-package-exists() {
178 local describe_flag
179 if version_is_at_least "6.4" "$(ghc-version)"; then
180 describe_flag="describe"
181 else
182 describe_flag="--show-package"
183 fi
184
185 $(ghc-getghcpkg) "${describe_flag}" "$1" > /dev/null 2>&1
186 }
187
188 # @FUNCTION: ghc-setup-pkg
189 # @DESCRIPTION:
190 # creates a local (package-specific) package
191 # configuration file; the arguments should be
192 # uninstalled package description files, each
193 # containing a single package description; if
194 # no arguments are given, the resulting file is
195 # empty
196 ghc-setup-pkg() {
197 local localpkgconf
198 localpkgconf="${S}/$(ghc-localpkgconf)"
199 echo '[]' > "${localpkgconf}"
200 local update_flag
201 if version_is_at_least "6.4" "$(ghc-version)"; then
202 update_flag="update -"
203 else
204 update_flag="--update-package"
205 fi
206 for pkg in $*; do
207 $(ghc-getghcpkgbin) -f "${localpkgconf}" ${update_flag} --force \
208 < "${pkg}" || die "failed to register ${pkg}"
209 done
210 }
211
212 # @FUNCTION: ghc-fixlibpath
213 # @DESCRIPTION:
214 # fixes the library and import directories path
215 # of the package configuration file
216 ghc-fixlibpath() {
217 sed -i "s|$1|$(ghc-libdir)|g" "${S}/$(ghc-localpkgconf)"
218 if [[ -n "$2" ]]; then
219 sed -i "s|$2|$(ghc-libdir)/imports|g" "${S}/$(ghc-localpkgconf)"
220 fi
221 }
222
223 # @FUNCTION: ghc-install-pkg
224 # @DESCRIPTION:
225 # moves the local (package-specific) package configuration
226 # file to its final destination
227 ghc-install-pkg() {
228 mkdir -p "${D}/$(ghc-confdir)"
229 cat "${S}/$(ghc-localpkgconf)" | sed "s|${D}||g" \
230 > "${D}/$(ghc-confdir)/$(ghc-localpkgconf)"
231 }
232
233 # @FUNCTION: ghc-register-pkg
234 # @DESCRIPTION:
235 # registers all packages in the local (package-specific)
236 # package configuration file
237 ghc-register-pkg() {
238 local localpkgconf
239 localpkgconf="$(ghc-confdir)/$1"
240 local update_flag
241 local describe_flag
242 if version_is_at_least "6.4" "$(ghc-version)"; then
243 update_flag="update -"
244 describe_flag="describe"
245 else
246 update_flag="--update-package"
247 describe_flag="--show-package"
248 fi
249 if [[ -f "${localpkgconf}" ]]; then
250 for pkg in $(ghc-listpkg "${localpkgconf}"); do
251 ebegin "Registering ${pkg} "
252 $(ghc-getghcpkgbin) -f "${localpkgconf}" "${describe_flag}" "${pkg}" \
253 | $(ghc-getghcpkg) ${update_flag} --force > /dev/null
254 eend $?
255 done
256 fi
257 }
258
259 # @FUNCTION: ghc-reregister
260 # @DESCRIPTION:
261 # re-adds all available .conf files to the global
262 # package conf file, to be used on a ghc reinstallation
263 ghc-reregister() {
264 has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
265 einfo "Re-adding packages (may cause several harmless warnings) ..."
266 PATH="${EPREFIX}/usr/bin:${PATH}" CONFDIR="$(ghc-confdir)"
267 if [ -d "${CONFDIR}" ]; then
268 pushd "${CONFDIR}" > /dev/null
269 for conf in *.conf; do
270 PATH="${EPREFIX}/usr/bin:${PATH}" ghc-register-pkg "${conf}"
271 done
272 popd > /dev/null
273 fi
274 }
275
276 # @FUNCTION: ghc-unregister-pkg
277 # @DESCRIPTION:
278 # unregisters a package configuration file
279 # protected are all packages that are still contained in
280 # another package configuration file
281 ghc-unregister-pkg() {
282 local localpkgconf
283 local i
284 local pkg
285 local protected
286 local unregister_flag
287 localpkgconf="$(ghc-confdir)/$1"
288
289 if version_is_at_least "6.4" "$(ghc-version)"; then
290 unregister_flag="unregister"
291 else
292 unregister_flag="--remove-package"
293 fi
294
295 for i in $(ghc-confdir)/*.conf; do
296 [[ "${i}" != "${localpkgconf}" ]] && protected="${protected} $(ghc-listpkg ${i})"
297 done
298 # protected now contains the packages that cannot be unregistered yet
299
300 if [[ -f "${localpkgconf}" ]]; then
301 for pkg in $(ghc-reverse "$(ghc-listpkg ${localpkgconf})"); do
302 if $(ghc-elem "${pkg}" "${protected}"); then
303 einfo "Package ${pkg} is protected."
304 elif ! ghc-package-exists "${pkg}"; then
305 :
306 # einfo "Package ${pkg} is not installed for ghc-$(ghc-version)."
307 else
308 ebegin "Unregistering ${pkg} "
309 $(ghc-getghcpkg) "${unregister_flag}" "${pkg}" --force > /dev/null
310 eend $?
311 fi
312 done
313 fi
314 }
315
316 # @FUNCTION: ghc-reverse
317 # @DESCRIPTION:
318 # help-function: reverse a list
319 ghc-reverse() {
320 local result
321 local i
322 for i in $1; do
323 result="${i} ${result}"
324 done
325 echo "${result}"
326 }
327
328 # @FUNCTION: ghc-elem
329 # @DESCRIPTION:
330 # help-function: element-check
331 ghc-elem() {
332 local i
333 for i in $2; do
334 [[ "$1" == "${i}" ]] && return 0
335 done
336 return 1
337 }
338
339 # @FUNCTION: ghc-listpkg
340 # @DESCRIPTION:
341 # show the packages in a package configuration file
342 ghc-listpkg() {
343 local ghcpkgcall
344 local i
345 local extra_flags
346 if version_is_at_least '6.12.3' "$(ghc-version)"; then
347 extra_flags="${extra_flags} -v0"
348 fi
349 for i in $*; do
350 if ghc-cabal; then
351 echo $($(ghc-getghcpkg) list ${extra_flags} -f "${i}") \
352 | sed \
353 -e "s|^.*${i}:\([^:]*\).*$|\1|" \
354 -e "s|/.*$||" \
355 -e "s|,| |g" -e "s|[(){}]||g"
356 else
357 echo $($(ghc-getghcpkgbin) -l -f "${i}") \
358 | cut -f2 -d':' \
359 | sed 's:,: :g'
360 fi
361 done
362 }
363
364 # @FUNCTION: ghc-package_pkg_setup
365 # @DESCRIPTION:
366 # exported function: check if we have a consistent ghc installation
367 ghc-package_pkg_setup() {
368 if ! ghc-saneghc; then
369 eerror "You have inconsistent versions of dev-lang/ghc and dev-lang/ghc-bin"
370 eerror "installed. Portage currently cannot work correctly with this setup."
371 eerror "There are several possibilities to work around this problem:"
372 eerror "(1) Up/downgrade ghc-bin to the same version as ghc."
373 eerror "(2) Unmerge ghc-bin."
374 eerror "(3) Unmerge ghc."
375 eerror "You probably want option 1 or 2."
376 die "Inconsistent versions of ghc and ghc-bin."
377 fi
378 }
379
380 # @FUNCTION: ghc-package_pkg_postinst
381 # @DESCRIPTION:
382 # exported function: registers the package-specific package
383 # configuration file
384 ghc-package_pkg_postinst() {
385 ghc-register-pkg "$(ghc-localpkgconf)"
386 }
387
388 # @FUNCTION: ghc-package_pkg_prerm
389 # @DESCRIPTION:
390 # exported function: unregisters the package-specific package
391 # configuration file; a package contained therein is unregistered
392 # only if it the same package is not also contained in another
393 # package configuration file ...
394 ghc-package_pkg_prerm() {
395 ghc-unregister-pkg "$(ghc-localpkgconf)"
396 }
397
398 EXPORT_FUNCTIONS pkg_setup pkg_postinst pkg_prerm

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