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Revision 1.17 - (show annotations) (download)
Thu Jun 15 11:27:38 2006 UTC (8 years, 5 months ago) by dcoutts
Branch: MAIN
Changes since 1.16: +2 -1 lines
Note that the ghc-package eclass is maintaind by the Haskell herd.

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 1.16 2006/03/01 12:58:01 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:${PATH}"
15
16 # for later configuration using environment variables/
17 # returns the name of the ghc executable
18 ghc-getghc() {
19 echo "ghc"
20 }
21
22 # returns the name of the ghc-pkg executable
23 ghc-getghcpkg() {
24 echo "ghc-pkg"
25 }
26
27 # returns the name of the ghc-pkg binary (ghc-pkg
28 # itself usually is a shell script, and we have to
29 # bypass the script under certain circumstances);
30 # for Cabal, we add an empty global package config file,
31 # because for some reason the global package file
32 # must be specified
33 ghc-getghcpkgbin() {
34 if ghc-cabal; then
35 echo '[]' > "${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 cabalpackage
62 local cabalversion
63 if ghc-cabal; then
64 # Try if ghc-pkg can determine the latest version.
65 # If not, use portage.
66 cabalpackage="$($(ghc-getghcpkg) latest Cabal 2> /dev/null)"
67 if [[ $? -eq 0 ]]; then
68 cabalversion="${cabalpackage#Cabal-}"
69 else
70 cabalpackage="$(best_version cabal)"
71 cabalversion="${cabalpackage#dev-haskell/cabal-}"
72 cabalversion="${cabalversion%-r*}"
73 cabalversion="${cabalversion%_pre*}"
74 fi
75 echo "Cabal-${cabalversion}"
76 else
77 # older ghc's don't support package versioning
78 echo Cabal
79 fi
80 }
81
82 # check if a standalone Cabal version is available for the
83 # currently used ghc; takes minimal version of Cabal as
84 # an optional argument
85 ghc-sanecabal() {
86 local f
87 local version
88 if [[ -z "$1" ]]; then version="1.0.1"; else version="$1"; fi
89 for f in $(ghc-confdir)/cabal-*; do
90 [[ -f "${f}" ]] && version_is_at_least "${version}" "${f#*cabal-}" && return
91 done
92 return 1
93 }
94
95 # returns the library directory
96 _GHC_LIBDIR_CACHE=""
97 ghc-libdir() {
98 if [[ -z "${_GHC_LIBDIR_CACHE}" ]]; then
99 _GHC_LIBDIR_CACHE="$($(ghc-getghc) --print-libdir)"
100 fi
101 echo "${_GHC_LIBDIR_CACHE}"
102 }
103
104 # returns the (Gentoo) library configuration directory
105 ghc-confdir() {
106 echo "$(ghc-libdir)/gentoo"
107 }
108
109 # returns the name of the local (package-specific)
110 # package configuration file
111 ghc-localpkgconf() {
112 echo "${PF}.conf"
113 }
114
115 # make a ghci foo.o file from a libfoo.a file
116 ghc-makeghcilib() {
117 local outfile
118 outfile="$(dirname $1)/$(basename $1 | sed 's:^lib\?\(.*\)\.a$:\1.o:')"
119 ld --relocatable --discard-all --output="${outfile}" --whole-archive "$1"
120 }
121
122 # tests if a ghc package exists
123 ghc-package-exists() {
124 $(ghc-getghcpkg) -s "$1" > /dev/null 2>&1
125 }
126
127 # creates a local (package-specific) package
128 # configuration file; the arguments should be
129 # uninstalled package description files, each
130 # containing a single package description; if
131 # no arguments are given, the resulting file is
132 # empty
133 ghc-setup-pkg() {
134 local localpkgconf
135 localpkgconf="${S}/$(ghc-localpkgconf)"
136 echo '[]' > "${localpkgconf}"
137 for pkg in $*; do
138 $(ghc-getghcpkgbin) -f "${localpkgconf}" -u --force \
139 < "${pkg}" || die "failed to register ${pkg}"
140 done
141 }
142
143 # fixes the library and import directories path
144 # of the package configuration file
145 ghc-fixlibpath() {
146 sed -i "s|$1|$(ghc-libdir)|g" "${S}/$(ghc-localpkgconf)"
147 if [[ -n "$2" ]]; then
148 sed -i "s|$2|$(ghc-libdir)/imports|g" "${S}/$(ghc-localpkgconf)"
149 fi
150 }
151
152 # moves the local (package-specific) package configuration
153 # file to its final destination
154 ghc-install-pkg() {
155 mkdir -p "${D}/$(ghc-confdir)"
156 cat "${S}/$(ghc-localpkgconf)" | sed "s|${D}||g" \
157 > "${D}/$(ghc-confdir)/$(ghc-localpkgconf)"
158 }
159
160 # registers all packages in the local (package-specific)
161 # package configuration file
162 ghc-register-pkg() {
163 local localpkgconf
164 localpkgconf="$(ghc-confdir)/$1"
165 if [[ -f "${localpkgconf}" ]]; then
166 for pkg in $(ghc-listpkg "${localpkgconf}"); do
167 ebegin "Registering ${pkg} "
168 $(ghc-getghcpkgbin) -f "${localpkgconf}" -s "${pkg}" \
169 | $(ghc-getghcpkg) -u --force > /dev/null
170 eend $?
171 done
172 fi
173 }
174
175 # re-adds all available .conf files to the global
176 # package conf file, to be used on a ghc reinstallation
177 ghc-reregister() {
178 einfo "Re-adding packages (may cause several harmless warnings) ..."
179 if [ -d "$(ghc-confdir)" ]; then
180 pushd "$(ghc-confdir)" > /dev/null
181 for conf in *.conf; do
182 # einfo "Processing ${conf} ..."
183 ghc-register-pkg "${conf}"
184 done
185 popd > /dev/null
186 fi
187 }
188
189 # unregisters a package configuration file
190 # protected are all packages that are still contained in
191 # another package configuration file
192 ghc-unregister-pkg() {
193 local localpkgconf
194 local i
195 local pkg
196 local protected
197 localpkgconf="$(ghc-confdir)/$1"
198
199 for i in $(ghc-confdir)/*.conf; do
200 [[ "${i}" != "${localpkgconf}" ]] && protected="${protected} $(ghc-listpkg ${i})"
201 done
202 # protected now contains the packages that cannot be unregistered yet
203
204 if [[ -f "${localpkgconf}" ]]; then
205 for pkg in $(ghc-reverse "$(ghc-listpkg ${localpkgconf})"); do
206 if $(ghc-elem "${pkg}" "${protected}"); then
207 einfo "Package ${pkg} is protected."
208 elif ! ghc-package-exists "${pkg}"; then
209 :
210 # einfo "Package ${pkg} is not installed for ghc-$(ghc-version)."
211 else
212 ebegin "Unregistering ${pkg} "
213 $(ghc-getghcpkg) -r "${pkg}" --force > /dev/null
214 eend $?
215 fi
216 done
217 fi
218 }
219
220 # help-function: reverse a list
221 ghc-reverse() {
222 local result
223 local i
224 for i in $1; do
225 result="${i} ${result}"
226 done
227 echo "${result}"
228 }
229
230 # help-function: element-check
231 ghc-elem() {
232 local i
233 for i in $2; do
234 [[ "$1" == "${i}" ]] && return 0
235 done
236 return 1
237 }
238
239 # show the packages in a package configuration file
240 ghc-listpkg() {
241 local ghcpkgcall
242 local i
243 for i in $*; do
244 if ghc-cabal; then
245 echo $($(ghc-getghcpkg) list -f "${i}") \
246 | sed \
247 -e "s|^.*${i}:\([^:]*\).*$|\1|" \
248 -e "s|/.*$||" \
249 -e "s|,| |g" -e "s|[()]||g"
250 else
251 echo $($(ghc-getghcpkgbin) -l -f "${i}") \
252 | cut -f2 -d':' \
253 | sed 's:,: :g'
254 fi
255 done
256 }
257
258 # exported function: registers the package-specific package
259 # configuration file
260 ghc-package_pkg_postinst() {
261 ghc-register-pkg "$(ghc-localpkgconf)"
262 }
263
264 # exported function: unregisters the package-specific package
265 # configuration file; a package contained therein is unregistered
266 # only if it the same package is not also contained in another
267 # package configuration file ...
268 ghc-package_pkg_prerm() {
269 ghc-unregister-pkg "$(ghc-localpkgconf)"
270 }
271
272 EXPORT_FUNCTIONS pkg_postinst pkg_prerm

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