/[gentoo-x86]/eclass/ghc-package.eclass
Gentoo

Contents of /eclass/ghc-package.eclass

Parent Directory Parent Directory | Revision Log Revision Log


Revision 1.19 - (show annotations) (download)
Wed Aug 2 19:52:04 2006 UTC (7 years, 8 months ago) by dcoutts
Branch: MAIN
Changes since 1.18: +7 -12 lines
The change about how we pick a version of cabal to use as described in the
previous commit. (Oops, committed in two bits, never mind)

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 1.18 2006/08/02 19:49:03 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:${PATH}"
15
16 # for later configuration using environment variables/
17 # returns the name of the ghc executable
18 ghc-getghc() {
19 echo "$(which ghc)"
20 }
21
22 # returns the name of the ghc-pkg executable
23 ghc-getghcpkg() {
24 echo "$(which ghc-pkg)"
25 }
26
27 # returns the name of the ghc-pkg binary (ghc-pkg
28 # itself usually is a shell script, and we have to
29 # bypass the script under certain circumstances);
30 # for Cabal, we add an empty global package config file,
31 # because for some reason the global package file
32 # must be specified
33 ghc-getghcpkgbin() {
34 if ghc-cabal; then
35 echo '[]' > "${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 # We ask portage, not ghc, so that we only pick up
65 # portage-installed cabal versions.
66 cabalpackage="$(best_version cabal)"
67 cabalversion="${cabalpackage#dev-haskell/cabal-}"
68 cabalversion="${cabalversion%-r*}"
69 cabalversion="${cabalversion%_pre*}"
70 echo "Cabal-${cabalversion}"
71 else
72 # older ghc's don't support package versioning
73 echo Cabal
74 fi
75 }
76
77 # check if a standalone Cabal version is available for the
78 # currently used ghc; takes minimal version of Cabal as
79 # an optional argument
80 ghc-sanecabal() {
81 local f
82 local version
83 if [[ -z "$1" ]]; then version="1.0.1"; else version="$1"; fi
84 for f in $(ghc-confdir)/cabal-*; do
85 [[ -f "${f}" ]] && version_is_at_least "${version}" "${f#*cabal-}" && return
86 done
87 return 1
88 }
89
90 # returns the library directory
91 _GHC_LIBDIR_CACHE=""
92 ghc-libdir() {
93 if [[ -z "${_GHC_LIBDIR_CACHE}" ]]; then
94 _GHC_LIBDIR_CACHE="$($(ghc-getghc) --print-libdir)"
95 fi
96 echo "${_GHC_LIBDIR_CACHE}"
97 }
98
99 # returns the (Gentoo) library configuration directory
100 ghc-confdir() {
101 echo "$(ghc-libdir)/gentoo"
102 }
103
104 # returns the name of the local (package-specific)
105 # package configuration file
106 ghc-localpkgconf() {
107 echo "${PF}.conf"
108 }
109
110 # make a ghci foo.o file from a libfoo.a file
111 ghc-makeghcilib() {
112 local outfile
113 outfile="$(dirname $1)/$(basename $1 | sed 's:^lib\?\(.*\)\.a$:\1.o:')"
114 ld --relocatable --discard-all --output="${outfile}" --whole-archive "$1"
115 }
116
117 # tests if a ghc package exists
118 ghc-package-exists() {
119 $(ghc-getghcpkg) -s "$1" > /dev/null 2>&1
120 }
121
122 # creates a local (package-specific) package
123 # configuration file; the arguments should be
124 # uninstalled package description files, each
125 # containing a single package description; if
126 # no arguments are given, the resulting file is
127 # empty
128 ghc-setup-pkg() {
129 local localpkgconf
130 localpkgconf="${S}/$(ghc-localpkgconf)"
131 echo '[]' > "${localpkgconf}"
132 for pkg in $*; do
133 $(ghc-getghcpkgbin) -f "${localpkgconf}" -u --force \
134 < "${pkg}" || die "failed to register ${pkg}"
135 done
136 }
137
138 # fixes the library and import directories path
139 # of the package configuration file
140 ghc-fixlibpath() {
141 sed -i "s|$1|$(ghc-libdir)|g" "${S}/$(ghc-localpkgconf)"
142 if [[ -n "$2" ]]; then
143 sed -i "s|$2|$(ghc-libdir)/imports|g" "${S}/$(ghc-localpkgconf)"
144 fi
145 }
146
147 # moves the local (package-specific) package configuration
148 # file to its final destination
149 ghc-install-pkg() {
150 mkdir -p "${D}/$(ghc-confdir)"
151 cat "${S}/$(ghc-localpkgconf)" | sed "s|${D}||g" \
152 > "${D}/$(ghc-confdir)/$(ghc-localpkgconf)"
153 }
154
155 # registers all packages in the local (package-specific)
156 # package configuration file
157 ghc-register-pkg() {
158 local localpkgconf
159 localpkgconf="$(ghc-confdir)/$1"
160 if [[ -f "${localpkgconf}" ]]; then
161 for pkg in $(ghc-listpkg "${localpkgconf}"); do
162 ebegin "Registering ${pkg} "
163 $(ghc-getghcpkgbin) -f "${localpkgconf}" -s "${pkg}" \
164 | $(ghc-getghcpkg) -u --force > /dev/null
165 eend $?
166 done
167 fi
168 }
169
170 # re-adds all available .conf files to the global
171 # package conf file, to be used on a ghc reinstallation
172 ghc-reregister() {
173 einfo "Re-adding packages (may cause several harmless warnings) ..."
174 if [ -d "$(ghc-confdir)" ]; then
175 pushd "$(ghc-confdir)" > /dev/null
176 for conf in *.conf; do
177 # einfo "Processing ${conf} ..."
178 ghc-register-pkg "${conf}"
179 done
180 popd > /dev/null
181 fi
182 }
183
184 # unregisters a package configuration file
185 # protected are all packages that are still contained in
186 # another package configuration file
187 ghc-unregister-pkg() {
188 local localpkgconf
189 local i
190 local pkg
191 local protected
192 localpkgconf="$(ghc-confdir)/$1"
193
194 for i in $(ghc-confdir)/*.conf; do
195 [[ "${i}" != "${localpkgconf}" ]] && protected="${protected} $(ghc-listpkg ${i})"
196 done
197 # protected now contains the packages that cannot be unregistered yet
198
199 if [[ -f "${localpkgconf}" ]]; then
200 for pkg in $(ghc-reverse "$(ghc-listpkg ${localpkgconf})"); do
201 if $(ghc-elem "${pkg}" "${protected}"); then
202 einfo "Package ${pkg} is protected."
203 elif ! ghc-package-exists "${pkg}"; then
204 :
205 # einfo "Package ${pkg} is not installed for ghc-$(ghc-version)."
206 else
207 ebegin "Unregistering ${pkg} "
208 $(ghc-getghcpkg) -r "${pkg}" --force > /dev/null
209 eend $?
210 fi
211 done
212 fi
213 }
214
215 # help-function: reverse a list
216 ghc-reverse() {
217 local result
218 local i
219 for i in $1; do
220 result="${i} ${result}"
221 done
222 echo "${result}"
223 }
224
225 # help-function: element-check
226 ghc-elem() {
227 local i
228 for i in $2; do
229 [[ "$1" == "${i}" ]] && return 0
230 done
231 return 1
232 }
233
234 # show the packages in a package configuration file
235 ghc-listpkg() {
236 local ghcpkgcall
237 local i
238 for i in $*; do
239 if ghc-cabal; then
240 echo $($(ghc-getghcpkg) list -f "${i}") \
241 | sed \
242 -e "s|^.*${i}:\([^:]*\).*$|\1|" \
243 -e "s|/.*$||" \
244 -e "s|,| |g" -e "s|[()]||g"
245 else
246 echo $($(ghc-getghcpkgbin) -l -f "${i}") \
247 | cut -f2 -d':' \
248 | sed 's:,: :g'
249 fi
250 done
251 }
252
253 # exported function: registers the package-specific package
254 # configuration file
255 ghc-package_pkg_postinst() {
256 ghc-register-pkg "$(ghc-localpkgconf)"
257 }
258
259 # exported function: unregisters the package-specific package
260 # configuration file; a package contained therein is unregistered
261 # only if it the same package is not also contained in another
262 # package configuration file ...
263 ghc-package_pkg_prerm() {
264 ghc-unregister-pkg "$(ghc-localpkgconf)"
265 }
266
267 EXPORT_FUNCTIONS pkg_postinst pkg_prerm

  ViewVC Help
Powered by ViewVC 1.1.20