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Revision 1.15 - (show annotations) (download)
Tue Sep 13 12:51:30 2005 UTC (9 years ago) by kosmikus
Branch: MAIN
Changes since 1.14: +123 -50 lines
more correct code to unregister ghc packages, preparation for haskell-cabal.eclass, better quoting of variables

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 1.9 2005/04/08 01:13:39 araujo Exp $
4 #
5 # Author: Andres Loeh <kosmikus@gentoo.org>
6 #
7 # This eclass helps with the Glasgow Haskell Compiler's package
8 # configuration utility.
9
10 inherit versionator
11
12 # promote /opt/ghc/bin to a better position in the search path
13 PATH="/usr/bin:/opt/ghc/bin:${PATH}"
14
15 # for later configuration using environment variables/
16 # returns the name of the ghc executable
17 ghc-getghc() {
18 echo "ghc"
19 }
20
21 # returns the name of the ghc-pkg executable
22 ghc-getghcpkg() {
23 echo "ghc-pkg"
24 }
25
26 # returns the name of the ghc-pkg binary (ghc-pkg
27 # itself usually is a shell script, and we have to
28 # bypass the script under certain circumstances);
29 # for Cabal, we add an empty global package config file,
30 # because for some reason the global package file
31 # must be specified
32 ghc-getghcpkgbin() {
33 if ghc-cabal; then
34 echo '[]' > "${T}/empty.conf"
35 echo "$(ghc-libdir)/ghc-pkg.bin" "--global-conf=${T}/empty.conf"
36 else
37 echo "$(ghc-libdir)/ghc-pkg.bin"
38 fi
39 }
40
41 # returns the version of ghc
42 _GHC_VERSION_CACHE=""
43 ghc-version() {
44 if [[ -z "${_GHC_VERSION_CACHE}" ]]; then
45 _GHC_VERSION_CACHE="$($(ghc-getghc) --version | sed 's:^.*version ::')"
46 fi
47 echo "${_GHC_VERSION_CACHE}"
48 }
49
50 # this function can be used to determine if ghc itself
51 # uses the Cabal package format; it has nothing to do
52 # with the Cabal libraries ... ghc uses the Cabal package
53 # format since version 6.4
54 ghc-cabal() {
55 version_is_at_least "6.4" "$(ghc-version)"
56 }
57
58 # return the best version of the Cabal library that is available
59 ghc-bestcabalversion() {
60 local cabalpackage
61 local cabalversion
62 if ghc-cabal; then
63 # Try if ghc-pkg can determine the latest version.
64 # If not, use portage.
65 cabalpackage="$($(ghc-getghcpkg) latest Cabal 2> /dev/null)"
66 if [[ $? -eq 0 ]]; then
67 cabalversion="${cabalpackage#Cabal-}"
68 else
69 cabalpackage="$(best_version cabal)"
70 cabalversion="${cabalpackage#dev-haskell/cabal-}"
71 cabalversion="${cabalversion%-r*}"
72 cabalversion="${cabalversion%_pre*}"
73 fi
74 echo "Cabal-${cabalversion}"
75 else
76 # older ghc's don't support package versioning
77 echo Cabal
78 fi
79 }
80
81 # check if a standalone Cabal version is available for the
82 # currently used ghc; takes minimal version of Cabal as
83 # an optional argument
84 ghc-sanecabal() {
85 local f
86 local version
87 if [[ -z "$1" ]]; then version="1.0.1"; else version="$1"; fi
88 for f in $(ghc-confdir)/cabal-*; do
89 [[ -f "${f}" ]] && version_is_at_least "${version}" "${f#*cabal-}" && return
90 done
91 return 1
92 }
93
94 # returns the library directory
95 _GHC_LIBDIR_CACHE=""
96 ghc-libdir() {
97 if [[ -z "${_GHC_LIBDIR_CACHE}" ]]; then
98 _GHC_LIBDIR_CACHE="$($(ghc-getghc) --print-libdir)"
99 fi
100 echo "${_GHC_LIBDIR_CACHE}"
101 }
102
103 # returns the (Gentoo) library configuration directory
104 ghc-confdir() {
105 echo "$(ghc-libdir)/gentoo"
106 }
107
108 # returns the name of the local (package-specific)
109 # package configuration file
110 ghc-localpkgconf() {
111 echo "${PF}.conf"
112 }
113
114 # make a ghci foo.o file from a libfoo.a file
115 ghc-makeghcilib() {
116 local outfile
117 outfile="$(dirname $1)/$(basename $1 | sed 's:^lib\?\(.*\)\.a$:\1.o:')"
118 ld --relocatable --discard-all --output="${outfile}" --whole-archive "$1"
119 }
120
121 # tests if a ghc package exists
122 ghc-package-exists() {
123 $(ghc-getghcpkg) -s "$1" > /dev/null 2>&1
124 }
125
126 # creates a local (package-specific) package
127 # configuration file; the arguments should be
128 # uninstalled package description files, each
129 # containing a single package description; if
130 # no arguments are given, the resulting file is
131 # empty
132 ghc-setup-pkg() {
133 local localpkgconf
134 localpkgconf="${S}/$(ghc-localpkgconf)"
135 echo '[]' > "${localpkgconf}"
136 for pkg in $*; do
137 $(ghc-getghcpkgbin) -f "${localpkgconf}" -u --force \
138 < "${pkg}" || die "failed to register ${pkg}"
139 done
140 }
141
142 # fixes the library and import directories path
143 # of the package configuration file
144 ghc-fixlibpath() {
145 sed -i "s|$1|$(ghc-libdir)|g" "${S}/$(ghc-localpkgconf)"
146 if [[ -n "$2" ]]; then
147 sed -i "s|$2|$(ghc-libdir)/imports|g" "${S}/$(ghc-localpkgconf)"
148 fi
149 }
150
151 # moves the local (package-specific) package configuration
152 # file to its final destination
153 ghc-install-pkg() {
154 mkdir -p "${D}/$(ghc-confdir)"
155 cat "${S}/$(ghc-localpkgconf)" | sed "s|${D}||g" \
156 > "${D}/$(ghc-confdir)/$(ghc-localpkgconf)"
157 }
158
159 # registers all packages in the local (package-specific)
160 # package configuration file
161 ghc-register-pkg() {
162 local localpkgconf
163 localpkgconf="$(ghc-confdir)/$1"
164 if [[ -f "${localpkgconf}" ]]; then
165 for pkg in $(ghc-listpkg "${localpkgconf}"); do
166 ebegin "Registering ${pkg} "
167 $(ghc-getghcpkgbin) -f "${localpkgconf}" -s "${pkg}" \
168 | $(ghc-getghcpkg) -u --force > /dev/null
169 eend $?
170 done
171 fi
172 }
173
174 # re-adds all available .conf files to the global
175 # package conf file, to be used on a ghc reinstallation
176 ghc-reregister() {
177 einfo "Re-adding packages (may cause several harmless warnings) ..."
178 if [ -d "$(ghc-confdir)" ]; then
179 pushd "$(ghc-confdir)" > /dev/null
180 for conf in *.conf; do
181 # einfo "Processing ${conf} ..."
182 ghc-register-pkg "${conf}"
183 done
184 popd > /dev/null
185 fi
186 }
187
188 # unregisters a package configuration file
189 # protected are all packages that are still contained in
190 # another package configuration file
191 ghc-unregister-pkg() {
192 local localpkgconf
193 local i
194 local pkg
195 local protected
196 localpkgconf="$(ghc-confdir)/$1"
197
198 for i in $(ghc-confdir)/*.conf; do
199 [[ "${i}" != "${localpkgconf}" ]] && protected="${protected} $(ghc-listpkg ${i})"
200 done
201 # protected now contains the packages that cannot be unregistered yet
202
203 if [[ -f "${localpkgconf}" ]]; then
204 for pkg in $(ghc-reverse "$(ghc-listpkg ${localpkgconf})"); do
205 if $(ghc-elem "${pkg}" "${protected}"); then
206 einfo "Package ${pkg} is protected."
207 elif ! ghc-package-exists "${pkg}"; then
208 :
209 # einfo "Package ${pkg} is not installed for ghc-$(ghc-version)."
210 else
211 ebegin "Unregistering ${pkg} "
212 $(ghc-getghcpkg) -r "${pkg}" --force > /dev/null
213 eend $?
214 fi
215 done
216 fi
217 }
218
219 # help-function: reverse a list
220 ghc-reverse() {
221 local result
222 local i
223 for i in $1; do
224 result="${i} ${result}"
225 done
226 echo "${result}"
227 }
228
229 # help-function: element-check
230 ghc-elem() {
231 local i
232 for i in $2; do
233 [[ "$1" == "${i}" ]] && return 0
234 done
235 return 1
236 }
237
238 # show the packages in a package configuration file
239 ghc-listpkg() {
240 local ghcpkgcall
241 local i
242 for i in $*; do
243 if ghc-cabal; then
244 echo $($(ghc-getghcpkg) list -f "${i}") \
245 | sed \
246 -e "s|^.*${i}:\([^:]*\).*$|\1|" \
247 -e "s|/.*$||" \
248 -e "s|,| |g" -e "s|[()]||g"
249 else
250 echo $($(ghc-getghcpkgbin) -l -f "${i}") \
251 | cut -f2 -d':' \
252 | sed 's:,: :g'
253 fi
254 done
255 }
256
257 # exported function: registers the package-specific package
258 # configuration file
259 ghc-package_pkg_postinst() {
260 ghc-register-pkg "$(ghc-localpkgconf)"
261 }
262
263 # exported function: unregisters the package-specific package
264 # configuration file; a package contained therein is unregistered
265 # only if it the same package is not also contained in another
266 # package configuration file ...
267 ghc-package_pkg_prerm() {
268 ghc-unregister-pkg "$(ghc-localpkgconf)"
269 }
270
271 EXPORT_FUNCTIONS pkg_postinst pkg_prerm

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