/[gentoo-x86]/eclass/ghc-package.eclass
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Revision 1.28 - (show annotations) (download)
Thu Jun 24 13:50:10 2010 UTC (4 years, 2 months ago) by kolmodin
Branch: MAIN
Changes since 1.27: +6 -2 lines
ghc-package.eclass: Fix for GHC 6.12.3 when having broken packages in your environment.

1 # Copyright 1999-2004 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 1.27 2009/03/23 20:06:19 kolmodin Exp $
4 #
5 # Author: Andres Loeh <kosmikus@gentoo.org>
6 # Maintained by: Haskell herd <haskell@gentoo.org>
7 #
8 # This eclass helps with the Glasgow Haskell Compiler's package
9 # configuration utility.
10
11 inherit versionator
12
13 # promote /opt/ghc/bin to a better position in the search path
14 PATH="/usr/bin:/opt/ghc/bin:${PATH}"
15
16 # for later configuration using environment variables/
17 # returns the name of the ghc executable
18 ghc-getghc() {
19 type -P ghc
20 }
21
22 # returns the name of the ghc-pkg executable
23 ghc-getghcpkg() {
24 type -P ghc-pkg
25 }
26
27 # returns the name of the ghc-pkg binary (ghc-pkg
28 # itself usually is a shell script, and we have to
29 # bypass the script under certain circumstances);
30 # for Cabal, we add an empty global package config file,
31 # because for some reason the global package file
32 # must be specified
33 ghc-getghcpkgbin() {
34 if version_is_at_least "6.10" "$(ghc-version)"; then
35 # the ghc-pkg executable changed name in ghc 6.10, as it no longer needs
36 # the wrapper script with the static flags
37 echo '[]' > "${T}/empty.conf"
38 echo "$(ghc-libdir)/ghc-pkg" "--global-conf=${T}/empty.conf"
39 elif ghc-cabal; then
40 echo '[]' > "${T}/empty.conf"
41 echo "$(ghc-libdir)/ghc-pkg.bin" "--global-conf=${T}/empty.conf"
42 else
43 echo "$(ghc-libdir)/ghc-pkg.bin"
44 fi
45 }
46
47 # returns the version of ghc
48 _GHC_VERSION_CACHE=""
49 ghc-version() {
50 if [[ -z "${_GHC_VERSION_CACHE}" ]]; then
51 _GHC_VERSION_CACHE="$($(ghc-getghc) --numeric-version)"
52 fi
53 echo "${_GHC_VERSION_CACHE}"
54 }
55
56 # this function can be used to determine if ghc itself
57 # uses the Cabal package format; it has nothing to do
58 # with the Cabal libraries ... ghc uses the Cabal package
59 # format since version 6.4
60 ghc-cabal() {
61 version_is_at_least "6.4" "$(ghc-version)"
62 }
63
64 # return the best version of the Cabal library that is available
65 ghc-bestcabalversion() {
66 local cabalversion
67 if ghc-cabal; then
68 # We ask portage, not ghc, so that we only pick up
69 # portage-installed cabal versions.
70 cabalversion="$(ghc-extractportageversion dev-haskell/cabal)"
71 echo "Cabal-${cabalversion}"
72 else
73 # older ghc's don't support package versioning
74 echo Cabal
75 fi
76 }
77
78 # check if a standalone Cabal version is available for the
79 # currently used ghc; takes minimal version of Cabal as
80 # an optional argument
81 ghc-sanecabal() {
82 local f
83 local version
84 if [[ -z "$1" ]]; then version="1.0.1"; else version="$1"; fi
85 for f in $(ghc-confdir)/cabal-*; do
86 [[ -f "${f}" ]] && version_is_at_least "${version}" "${f#*cabal-}" && return
87 done
88 return 1
89 }
90
91 # checks if ghc and ghc-bin are installed in the same version
92 # (if they're both installed); if this is not the case, we
93 # unfortunately cannot trust portage's dependency resolution
94 ghc-saneghc() {
95 local ghcversion
96 local ghcbinversion
97 if [[ "${PN}" == "ghc" || "${PN}" == "ghc-bin" ]]; then
98 return
99 fi
100 if has_version dev-lang/ghc && has_version dev-lang/ghc-bin; then
101 ghcversion="$(ghc-extractportageversion dev-lang/ghc)"
102 ghcbinversion="$(ghc-extractportageversion dev-lang/ghc-bin)"
103 if [[ "${ghcversion}" != "${ghcbinversion}" ]]; then
104 return 1
105 fi
106 fi
107 return
108 }
109
110 # extract the version of a portage-installed package
111 ghc-extractportageversion() {
112 local pkg
113 local version
114 pkg="$(best_version $1)"
115 version="${pkg#$1-}"
116 version="${version%-r*}"
117 version="${version%_pre*}"
118 echo "${version}"
119 }
120
121 # returns the library directory
122 _GHC_LIBDIR_CACHE=""
123 ghc-libdir() {
124 if [[ -z "${_GHC_LIBDIR_CACHE}" ]]; then
125 _GHC_LIBDIR_CACHE="$($(ghc-getghc) --print-libdir)"
126 fi
127 echo "${_GHC_LIBDIR_CACHE}"
128 }
129
130 # returns the (Gentoo) library configuration directory
131 ghc-confdir() {
132 echo "$(ghc-libdir)/gentoo"
133 }
134
135 # returns the name of the local (package-specific)
136 # package configuration file
137 ghc-localpkgconf() {
138 echo "${PF}.conf"
139 }
140
141 # make a ghci foo.o file from a libfoo.a file
142 ghc-makeghcilib() {
143 local outfile
144 outfile="$(dirname $1)/$(basename $1 | sed 's:^lib\?\(.*\)\.a$:\1.o:')"
145 ld --relocatable --discard-all --output="${outfile}" --whole-archive "$1"
146 }
147
148 # tests if a ghc package exists
149 ghc-package-exists() {
150 local describe_flag
151 if version_is_at_least "6.4" "$(ghc-version)"; then
152 describe_flag="describe"
153 else
154 describe_flag="--show-package"
155 fi
156
157 $(ghc-getghcpkg) "${describe_flag}" "$1" > /dev/null 2>&1
158 }
159
160 # creates a local (package-specific) package
161 # configuration file; the arguments should be
162 # uninstalled package description files, each
163 # containing a single package description; if
164 # no arguments are given, the resulting file is
165 # empty
166 ghc-setup-pkg() {
167 local localpkgconf
168 localpkgconf="${S}/$(ghc-localpkgconf)"
169 echo '[]' > "${localpkgconf}"
170 local update_flag
171 if version_is_at_least "6.4" "$(ghc-version)"; then
172 update_flag="update -"
173 else
174 update_flag="--update-package"
175 fi
176 for pkg in $*; do
177 $(ghc-getghcpkgbin) -f "${localpkgconf}" ${update_flag} --force \
178 < "${pkg}" || die "failed to register ${pkg}"
179 done
180 }
181
182 # fixes the library and import directories path
183 # of the package configuration file
184 ghc-fixlibpath() {
185 sed -i "s|$1|$(ghc-libdir)|g" "${S}/$(ghc-localpkgconf)"
186 if [[ -n "$2" ]]; then
187 sed -i "s|$2|$(ghc-libdir)/imports|g" "${S}/$(ghc-localpkgconf)"
188 fi
189 }
190
191 # moves the local (package-specific) package configuration
192 # file to its final destination
193 ghc-install-pkg() {
194 mkdir -p "${D}/$(ghc-confdir)"
195 cat "${S}/$(ghc-localpkgconf)" | sed "s|${D}||g" \
196 > "${D}/$(ghc-confdir)/$(ghc-localpkgconf)"
197 }
198
199 # registers all packages in the local (package-specific)
200 # package configuration file
201 ghc-register-pkg() {
202 local localpkgconf
203 localpkgconf="$(ghc-confdir)/$1"
204 local update_flag
205 local describe_flag
206 if version_is_at_least "6.4" "$(ghc-version)"; then
207 update_flag="update -"
208 describe_flag="describe"
209 else
210 update_flag="--update-package"
211 describe_flag="--show-package"
212 fi
213 if [[ -f "${localpkgconf}" ]]; then
214 for pkg in $(ghc-listpkg "${localpkgconf}"); do
215 ebegin "Registering ${pkg} "
216 $(ghc-getghcpkgbin) -f "${localpkgconf}" "${describe_flag}" "${pkg}" \
217 | $(ghc-getghcpkg) ${update_flag} --force > /dev/null
218 eend $?
219 done
220 fi
221 }
222
223 # re-adds all available .conf files to the global
224 # package conf file, to be used on a ghc reinstallation
225 ghc-reregister() {
226 einfo "Re-adding packages (may cause several harmless warnings) ..."
227 PATH="/usr/bin:${PATH}" CONFDIR="$(ghc-confdir)"
228 if [ -d "${CONFDIR}" ]; then
229 pushd "${CONFDIR}" > /dev/null
230 for conf in *.conf; do
231 PATH="/usr/bin:${PATH}" ghc-register-pkg "${conf}"
232 done
233 popd > /dev/null
234 fi
235 }
236
237 # unregisters a package configuration file
238 # protected are all packages that are still contained in
239 # another package configuration file
240 ghc-unregister-pkg() {
241 local localpkgconf
242 local i
243 local pkg
244 local protected
245 local unregister_flag
246 localpkgconf="$(ghc-confdir)/$1"
247
248 if version_is_at_least "6.4" "$(ghc-version)"; then
249 unregister_flag="unregister"
250 else
251 unregister_flag="--remove-package"
252 fi
253
254 for i in $(ghc-confdir)/*.conf; do
255 [[ "${i}" != "${localpkgconf}" ]] && protected="${protected} $(ghc-listpkg ${i})"
256 done
257 # protected now contains the packages that cannot be unregistered yet
258
259 if [[ -f "${localpkgconf}" ]]; then
260 for pkg in $(ghc-reverse "$(ghc-listpkg ${localpkgconf})"); do
261 if $(ghc-elem "${pkg}" "${protected}"); then
262 einfo "Package ${pkg} is protected."
263 elif ! ghc-package-exists "${pkg}"; then
264 :
265 # einfo "Package ${pkg} is not installed for ghc-$(ghc-version)."
266 else
267 ebegin "Unregistering ${pkg} "
268 $(ghc-getghcpkg) "${unregister_flag}" "${pkg}" --force > /dev/null
269 eend $?
270 fi
271 done
272 fi
273 }
274
275 # help-function: reverse a list
276 ghc-reverse() {
277 local result
278 local i
279 for i in $1; do
280 result="${i} ${result}"
281 done
282 echo "${result}"
283 }
284
285 # help-function: element-check
286 ghc-elem() {
287 local i
288 for i in $2; do
289 [[ "$1" == "${i}" ]] && return 0
290 done
291 return 1
292 }
293
294 # show the packages in a package configuration file
295 ghc-listpkg() {
296 local ghcpkgcall
297 local i
298 local extra_flags
299 if version_is_at_least '6.12.3' "$(ghc-version)"; then
300 extra_flags="${extra_flags} -v0"
301 fi
302 for i in $*; do
303 if ghc-cabal; then
304 echo $($(ghc-getghcpkg) list ${extra_flags} -f "${i}") \
305 | sed \
306 -e "s|^.*${i}:\([^:]*\).*$|\1|" \
307 -e "s|/.*$||" \
308 -e "s|,| |g" -e "s|[(){}]||g"
309 else
310 echo $($(ghc-getghcpkgbin) -l -f "${i}") \
311 | cut -f2 -d':' \
312 | sed 's:,: :g'
313 fi
314 done
315 }
316
317 # exported function: check if we have a consistent ghc installation
318 ghc-package_pkg_setup() {
319 if ! ghc-saneghc; then
320 eerror "You have inconsistent versions of dev-lang/ghc and dev-lang/ghc-bin"
321 eerror "installed. Portage currently cannot work correctly with this setup."
322 eerror "There are several possibilities to work around this problem:"
323 eerror "(1) Up/downgrade ghc-bin to the same version as ghc."
324 eerror "(2) Unmerge ghc-bin."
325 eerror "(3) Unmerge ghc."
326 eerror "You probably want option 1 or 2."
327 die "Inconsistent versions of ghc and ghc-bin."
328 fi
329 }
330
331 # exported function: registers the package-specific package
332 # configuration file
333 ghc-package_pkg_postinst() {
334 ghc-register-pkg "$(ghc-localpkgconf)"
335 }
336
337 # exported function: unregisters the package-specific package
338 # configuration file; a package contained therein is unregistered
339 # only if it the same package is not also contained in another
340 # package configuration file ...
341 ghc-package_pkg_prerm() {
342 ghc-unregister-pkg "$(ghc-localpkgconf)"
343 }
344
345 EXPORT_FUNCTIONS pkg_setup pkg_postinst pkg_prerm

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