/[gentoo-x86]/eclass/ghc-package.eclass
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Revision 1.25 - (show annotations) (download)
Thu Dec 13 04:42:48 2007 UTC (6 years, 6 months ago) by dcoutts
Branch: MAIN
Changes since 1.24: +2 -2 lines
Update ghc eclass for new ghc-6.8 quirk

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 1.24 2007/07/25 18:40:29 dcoutts 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:${PATH}"
15
16 # for later configuration using environment variables/
17 # returns the name of the ghc executable
18 ghc-getghc() {
19 type -P ghc
20 }
21
22 # returns the name of the ghc-pkg executable
23 ghc-getghcpkg() {
24 type -P ghc-pkg
25 }
26
27 # returns the name of the ghc-pkg binary (ghc-pkg
28 # itself usually is a shell script, and we have to
29 # bypass the script under certain circumstances);
30 # for Cabal, we add an empty global package config file,
31 # because for some reason the global package file
32 # must be specified
33 ghc-getghcpkgbin() {
34 if ghc-cabal; then
35 echo '[]' > "${T}/empty.conf"
36 echo "$(ghc-libdir)/ghc-pkg.bin" "--global-conf=${T}/empty.conf"
37 else
38 echo "$(ghc-libdir)/ghc-pkg.bin"
39 fi
40 }
41
42 # returns the version of ghc
43 _GHC_VERSION_CACHE=""
44 ghc-version() {
45 if [[ -z "${_GHC_VERSION_CACHE}" ]]; then
46 _GHC_VERSION_CACHE="$($(ghc-getghc) --numeric-version)"
47 fi
48 echo "${_GHC_VERSION_CACHE}"
49 }
50
51 # this function can be used to determine if ghc itself
52 # uses the Cabal package format; it has nothing to do
53 # with the Cabal libraries ... ghc uses the Cabal package
54 # format since version 6.4
55 ghc-cabal() {
56 version_is_at_least "6.4" "$(ghc-version)"
57 }
58
59 # return the best version of the Cabal library that is available
60 ghc-bestcabalversion() {
61 local cabalversion
62 if ghc-cabal; then
63 # We ask portage, not ghc, so that we only pick up
64 # portage-installed cabal versions.
65 cabalversion="$(ghc-extractportageversion dev-haskell/cabal)"
66 echo "Cabal-${cabalversion}"
67 else
68 # older ghc's don't support package versioning
69 echo Cabal
70 fi
71 }
72
73 # check if a standalone Cabal version is available for the
74 # currently used ghc; takes minimal version of Cabal as
75 # an optional argument
76 ghc-sanecabal() {
77 local f
78 local version
79 if [[ -z "$1" ]]; then version="1.0.1"; else version="$1"; fi
80 for f in $(ghc-confdir)/cabal-*; do
81 [[ -f "${f}" ]] && version_is_at_least "${version}" "${f#*cabal-}" && return
82 done
83 return 1
84 }
85
86 # checks if ghc and ghc-bin are installed in the same version
87 # (if they're both installed); if this is not the case, we
88 # unfortunately cannot trust portage's dependency resolution
89 ghc-saneghc() {
90 local ghcversion
91 local ghcbinversion
92 if [[ "${PN}" == "ghc" || "${PN}" == "ghc-bin" ]]; then
93 return
94 fi
95 if has_version dev-lang/ghc && has_version dev-lang/ghc-bin; then
96 ghcversion="$(ghc-extractportageversion dev-lang/ghc)"
97 ghcbinversion="$(ghc-extractportageversion dev-lang/ghc-bin)"
98 if [[ "${ghcversion}" != "${ghcbinversion}" ]]; then
99 return 1
100 fi
101 fi
102 return
103 }
104
105 # extract the version of a portage-installed package
106 ghc-extractportageversion() {
107 local pkg
108 local version
109 pkg="$(best_version $1)"
110 version="${pkg#$1-}"
111 version="${version%-r*}"
112 version="${version%_pre*}"
113 echo "${version}"
114 }
115
116 # returns the library directory
117 _GHC_LIBDIR_CACHE=""
118 ghc-libdir() {
119 if [[ -z "${_GHC_LIBDIR_CACHE}" ]]; then
120 _GHC_LIBDIR_CACHE="$($(ghc-getghc) --print-libdir)"
121 fi
122 echo "${_GHC_LIBDIR_CACHE}"
123 }
124
125 # returns the (Gentoo) library configuration directory
126 ghc-confdir() {
127 echo "$(ghc-libdir)/gentoo"
128 }
129
130 # returns the name of the local (package-specific)
131 # package configuration file
132 ghc-localpkgconf() {
133 echo "${PF}.conf"
134 }
135
136 # make a ghci foo.o file from a libfoo.a file
137 ghc-makeghcilib() {
138 local outfile
139 outfile="$(dirname $1)/$(basename $1 | sed 's:^lib\?\(.*\)\.a$:\1.o:')"
140 ld --relocatable --discard-all --output="${outfile}" --whole-archive "$1"
141 }
142
143 # tests if a ghc package exists
144 ghc-package-exists() {
145 $(ghc-getghcpkg) -s "$1" > /dev/null 2>&1
146 }
147
148 # creates a local (package-specific) package
149 # configuration file; the arguments should be
150 # uninstalled package description files, each
151 # containing a single package description; if
152 # no arguments are given, the resulting file is
153 # empty
154 ghc-setup-pkg() {
155 local localpkgconf
156 localpkgconf="${S}/$(ghc-localpkgconf)"
157 echo '[]' > "${localpkgconf}"
158 for pkg in $*; do
159 $(ghc-getghcpkgbin) -f "${localpkgconf}" -u --force \
160 < "${pkg}" || die "failed to register ${pkg}"
161 done
162 }
163
164 # fixes the library and import directories path
165 # of the package configuration file
166 ghc-fixlibpath() {
167 sed -i "s|$1|$(ghc-libdir)|g" "${S}/$(ghc-localpkgconf)"
168 if [[ -n "$2" ]]; then
169 sed -i "s|$2|$(ghc-libdir)/imports|g" "${S}/$(ghc-localpkgconf)"
170 fi
171 }
172
173 # moves the local (package-specific) package configuration
174 # file to its final destination
175 ghc-install-pkg() {
176 mkdir -p "${D}/$(ghc-confdir)"
177 cat "${S}/$(ghc-localpkgconf)" | sed "s|${D}||g" \
178 > "${D}/$(ghc-confdir)/$(ghc-localpkgconf)"
179 }
180
181 # registers all packages in the local (package-specific)
182 # package configuration file
183 ghc-register-pkg() {
184 local localpkgconf
185 localpkgconf="$(ghc-confdir)/$1"
186 if [[ -f "${localpkgconf}" ]]; then
187 for pkg in $(ghc-listpkg "${localpkgconf}"); do
188 ebegin "Registering ${pkg} "
189 $(ghc-getghcpkgbin) -f "${localpkgconf}" -s "${pkg}" \
190 | $(ghc-getghcpkg) -u --force > /dev/null
191 eend $?
192 done
193 fi
194 }
195
196 # re-adds all available .conf files to the global
197 # package conf file, to be used on a ghc reinstallation
198 ghc-reregister() {
199 einfo "Re-adding packages (may cause several harmless warnings) ..."
200 if [ -d "$(ghc-confdir)" ]; then
201 pushd "$(ghc-confdir)" > /dev/null
202 for conf in *.conf; do
203 # einfo "Processing ${conf} ..."
204 ghc-register-pkg "${conf}"
205 done
206 popd > /dev/null
207 fi
208 }
209
210 # unregisters a package configuration file
211 # protected are all packages that are still contained in
212 # another package configuration file
213 ghc-unregister-pkg() {
214 local localpkgconf
215 local i
216 local pkg
217 local protected
218 localpkgconf="$(ghc-confdir)/$1"
219
220 for i in $(ghc-confdir)/*.conf; do
221 [[ "${i}" != "${localpkgconf}" ]] && protected="${protected} $(ghc-listpkg ${i})"
222 done
223 # protected now contains the packages that cannot be unregistered yet
224
225 if [[ -f "${localpkgconf}" ]]; then
226 for pkg in $(ghc-reverse "$(ghc-listpkg ${localpkgconf})"); do
227 if $(ghc-elem "${pkg}" "${protected}"); then
228 einfo "Package ${pkg} is protected."
229 elif ! ghc-package-exists "${pkg}"; then
230 :
231 # einfo "Package ${pkg} is not installed for ghc-$(ghc-version)."
232 else
233 ebegin "Unregistering ${pkg} "
234 $(ghc-getghcpkg) -r "${pkg}" --force > /dev/null
235 eend $?
236 fi
237 done
238 fi
239 }
240
241 # help-function: reverse a list
242 ghc-reverse() {
243 local result
244 local i
245 for i in $1; do
246 result="${i} ${result}"
247 done
248 echo "${result}"
249 }
250
251 # help-function: element-check
252 ghc-elem() {
253 local i
254 for i in $2; do
255 [[ "$1" == "${i}" ]] && return 0
256 done
257 return 1
258 }
259
260 # show the packages in a package configuration file
261 ghc-listpkg() {
262 local ghcpkgcall
263 local i
264 for i in $*; do
265 if ghc-cabal; then
266 echo $($(ghc-getghcpkg) list -f "${i}") \
267 | sed \
268 -e "s|^.*${i}:\([^:]*\).*$|\1|" \
269 -e "s|/.*$||" \
270 -e "s|,| |g" -e "s|[(){}]||g"
271 else
272 echo $($(ghc-getghcpkgbin) -l -f "${i}") \
273 | cut -f2 -d':' \
274 | sed 's:,: :g'
275 fi
276 done
277 }
278
279 # exported function: check if we have a consistent ghc installation
280 ghc-package_pkg_setup() {
281 if ! ghc-saneghc; then
282 eerror "You have inconsistent versions of dev-lang/ghc and dev-lang/ghc-bin"
283 eerror "installed. Portage currently cannot work correctly with this setup."
284 eerror "There are several possibilities to work around this problem:"
285 eerror "(1) Up/downgrade ghc-bin to the same version as ghc."
286 eerror "(2) Unmerge ghc-bin."
287 eerror "(3) Unmerge ghc."
288 eerror "You probably want option 1 or 2."
289 die "Inconsistent versions of ghc and ghc-bin."
290 fi
291 }
292
293 # exported function: registers the package-specific package
294 # configuration file
295 ghc-package_pkg_postinst() {
296 ghc-register-pkg "$(ghc-localpkgconf)"
297 }
298
299 # exported function: unregisters the package-specific package
300 # configuration file; a package contained therein is unregistered
301 # only if it the same package is not also contained in another
302 # package configuration file ...
303 ghc-package_pkg_prerm() {
304 ghc-unregister-pkg "$(ghc-localpkgconf)"
305 }
306
307 EXPORT_FUNCTIONS pkg_setup pkg_postinst pkg_prerm

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