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Revision 1.38 - (show annotations) (download)
Sun Jan 19 08:23:36 2014 UTC (7 months, 1 week ago) by slyfox
Branch: MAIN
Changes since 1.37: +10 -3 lines
Add 'ghc-supports-interpreter' helper to detect interpreter support.

1 # Copyright 1999-2014 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 1.37 2013/05/11 12:46:32 slyfox Exp $
4
5 # @ECLASS: ghc-package.eclass
6 # @MAINTAINER:
7 # "Gentoo's Haskell Language team" <haskell@gentoo.org>
8 # @AUTHOR:
9 # Original Author: Andres Loeh <kosmikus@gentoo.org>
10 # @BLURB: This eclass helps with the Glasgow Haskell Compiler's package configuration utility.
11 # @DESCRIPTION:
12 # Helper eclass to handle ghc installation/upgrade/deinstallation process.
13
14 inherit versionator
15
16 # @FUNCTION: ghc-getghc
17 # @DESCRIPTION:
18 # returns the name of the ghc executable
19 ghc-getghc() {
20 type -P ghc
21 }
22
23 # @FUNCTION: ghc-getghcpkg
24 # @DESCRIPTION:
25 # Internal function determines returns the name of the ghc-pkg executable
26 ghc-getghcpkg() {
27 type -P ghc-pkg
28 }
29
30 # @FUNCTION: ghc-getghcpkgbin
31 # @DESCRIPTION:
32 # returns the name of the ghc-pkg binary (ghc-pkg
33 # itself usually is a shell script, and we have to
34 # bypass the script under certain circumstances);
35 # for Cabal, we add an empty global package config file,
36 # because for some reason the global package file
37 # must be specified
38 ghc-getghcpkgbin() {
39 # the ghc-pkg executable changed name in ghc 6.10, as it no longer needs
40 # the wrapper script with the static flags
41 echo '[]' > "${T}/empty.conf"
42 if version_is_at_least "7.7.20121101" "$(ghc-version)"; then
43 # was moved to bin/ subtree by:
44 # http://www.haskell.org/pipermail/cvs-ghc/2012-September/076546.html
45 echo "$(ghc-libdir)/bin/ghc-pkg" "--global-package-db=${T}/empty.conf"
46 elif version_is_at_least "7.5.20120516" "$(ghc-version)"; then
47 echo "$(ghc-libdir)/ghc-pkg" "--global-package-db=${T}/empty.conf"
48 else
49 echo "$(ghc-libdir)/ghc-pkg" "--global-conf=${T}/empty.conf"
50 fi
51 }
52
53 # @FUNCTION: ghc-version
54 # @DESCRIPTION:
55 # returns the version of ghc
56 _GHC_VERSION_CACHE=""
57 ghc-version() {
58 if [[ -z "${_GHC_VERSION_CACHE}" ]]; then
59 _GHC_VERSION_CACHE="$($(ghc-getghc) --numeric-version)"
60 fi
61 echo "${_GHC_VERSION_CACHE}"
62 }
63
64 # @FUNCTION: ghc-bestcabalversion
65 # @DESCRIPTION:
66 # return the best version of the Cabal library that is available
67 ghc-bestcabalversion() {
68 # We ask portage, not ghc, so that we only pick up
69 # portage-installed cabal versions.
70 local cabalversion="$(ghc-extractportageversion dev-haskell/cabal)"
71 echo "Cabal-${cabalversion}"
72 }
73
74 # @FUNCTION: ghc-sanecabal
75 # @DESCRIPTION:
76 # check if a standalone Cabal version is available for the
77 # currently used ghc; takes minimal version of Cabal as
78 # an optional argument
79 ghc-sanecabal() {
80 local f
81 local version
82 if [[ -z "$1" ]]; then version="1.0.1"; else version="$1"; fi
83 for f in $(ghc-confdir)/cabal-*; do
84 [[ -f "${f}" ]] && version_is_at_least "${version}" "${f#*cabal-}" && return
85 done
86 return 1
87 }
88
89 # @FUNCTION: ghc-supports-shared-libraries
90 # @DESCRIPTION:
91 # checks if ghc is built with support for building
92 # shared libraries (aka '-dynamic' option)
93 ghc-supports-shared-libraries() {
94 $(ghc-getghc) --info | grep "RTS ways" | grep -q "dyn"
95 }
96
97 # @FUNCTION: ghc-supports-threaded-runtime
98 # @DESCRIPTION:
99 # checks if ghc is built with support for threaded
100 # runtime (aka '-threaded' option)
101 ghc-supports-threaded-runtime() {
102 $(ghc-getghc) --info | grep "RTS ways" | grep -q "thr"
103 }
104
105 # @FUNCTION: ghc-supports-smp
106 # @DESCRIPTION:
107 # checks if ghc is built with support for multiple cores runtime
108 ghc-supports-smp() {
109 $(ghc-getghc) --info | grep "Support SMP" | grep -q "YES"
110 }
111
112 # @FUNCTION: ghc-supports-dynamic-by-default
113 # @DESCRIPTION:
114 # checks if ghc links against shared haskell libraries by default
115 ghc-supports-dynamic-by-default() {
116 $(ghc-getghc) --info | grep "Dynamic by default" | grep -q "YES"
117 }
118
119 # @FUNCTION: ghc-supports-interpreter
120 # @DESCRIPTION:
121 # checks if ghc has interpreter mode (aka GHCi)
122 # It usually means that ghc supports for template haskell.
123 ghc-supports-interpreter() {
124 $(ghc-getghc) --info | grep "Have interpreter" | grep -q "YES"
125 }
126
127 # @FUNCTION: ghc-extractportageversion
128 # @DESCRIPTION:
129 # extract the version of a portage-installed package
130 ghc-extractportageversion() {
131 local pkg
132 local version
133 pkg="$(best_version $1)"
134 version="${pkg#$1-}"
135 version="${version%-r*}"
136 version="${version%_pre*}"
137 echo "${version}"
138 }
139
140 # @FUNCTION: ghc-libdir
141 # @DESCRIPTION:
142 # returns the library directory
143 _GHC_LIBDIR_CACHE=""
144 ghc-libdir() {
145 if [[ -z "${_GHC_LIBDIR_CACHE}" ]]; then
146 _GHC_LIBDIR_CACHE="$($(ghc-getghc) --print-libdir)"
147 fi
148 echo "${_GHC_LIBDIR_CACHE}"
149 }
150
151 # @FUNCTION: ghc-confdir
152 # @DESCRIPTION:
153 # returns the (Gentoo) library configuration directory
154 ghc-confdir() {
155 echo "$(ghc-libdir)/gentoo"
156 }
157
158 # @FUNCTION: ghc-localpkgconf
159 # @DESCRIPTION:
160 # returns the name of the local (package-specific)
161 # package configuration file
162 ghc-localpkgconf() {
163 echo "${PF}.conf"
164 }
165
166 # @FUNCTION: ghc-makeghcilib
167 # @DESCRIPTION:
168 # make a ghci foo.o file from a libfoo.a file
169 ghc-makeghcilib() {
170 local outfile
171 outfile="$(dirname $1)/$(basename $1 | sed 's:^lib\?\(.*\)\.a$:\1.o:')"
172 ld --relocatable --discard-all --output="${outfile}" --whole-archive "$1"
173 }
174
175 # @FUNCTION: ghc-package-exists
176 # @DESCRIPTION:
177 # tests if a ghc package exists
178 ghc-package-exists() {
179 $(ghc-getghcpkg) describe "$1" > /dev/null 2>&1
180 }
181
182 # @FUNCTION: ghc-setup-pkg
183 # @DESCRIPTION:
184 # creates a local (package-specific) package
185 # configuration file; the arguments should be
186 # uninstalled package description files, each
187 # containing a single package description; if
188 # no arguments are given, the resulting file is
189 # empty
190 ghc-setup-pkg() {
191 local localpkgconf="${S}/$(ghc-localpkgconf)"
192 echo '[]' > "${localpkgconf}"
193
194 for pkg in $*; do
195 $(ghc-getghcpkgbin) -f "${localpkgconf}" update - --force \
196 < "${pkg}" || die "failed to register ${pkg}"
197 done
198 }
199
200 # @FUNCTION: ghc-fixlibpath
201 # @DESCRIPTION:
202 # fixes the library and import directories path
203 # of the package configuration file
204 ghc-fixlibpath() {
205 sed -i "s|$1|$(ghc-libdir)|g" "${S}/$(ghc-localpkgconf)"
206 if [[ -n "$2" ]]; then
207 sed -i "s|$2|$(ghc-libdir)/imports|g" "${S}/$(ghc-localpkgconf)"
208 fi
209 }
210
211 # @FUNCTION: ghc-install-pkg
212 # @DESCRIPTION:
213 # moves the local (package-specific) package configuration
214 # file to its final destination
215 ghc-install-pkg() {
216 mkdir -p "${D}/$(ghc-confdir)"
217 cat "${S}/$(ghc-localpkgconf)" | sed "s|${D}||g" \
218 > "${D}/$(ghc-confdir)/$(ghc-localpkgconf)"
219 }
220
221 # @FUNCTION: ghc-register-pkg
222 # @DESCRIPTION:
223 # registers all packages in the local (package-specific)
224 # package configuration file
225 ghc-register-pkg() {
226 local localpkgconf="$(ghc-confdir)/$1"
227
228 if [[ -f "${localpkgconf}" ]]; then
229 for pkg in $(ghc-listpkg "${localpkgconf}"); do
230 ebegin "Registering ${pkg} "
231 $(ghc-getghcpkgbin) -f "${localpkgconf}" describe "${pkg}" \
232 | $(ghc-getghcpkg) update - --force > /dev/null
233 eend $?
234 done
235 fi
236 }
237
238 # @FUNCTION: ghc-reregister
239 # @DESCRIPTION:
240 # re-adds all available .conf files to the global
241 # package conf file, to be used on a ghc reinstallation
242 ghc-reregister() {
243 has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
244 einfo "Re-adding packages (may cause several harmless warnings) ..."
245 PATH="${EPREFIX}/usr/bin:${PATH}" CONFDIR="$(ghc-confdir)"
246 if [ -d "${CONFDIR}" ]; then
247 pushd "${CONFDIR}" > /dev/null
248 for conf in *.conf; do
249 PATH="${EPREFIX}/usr/bin:${PATH}" ghc-register-pkg "${conf}"
250 done
251 popd > /dev/null
252 fi
253 }
254
255 # @FUNCTION: ghc-unregister-pkg
256 # @DESCRIPTION:
257 # unregisters a package configuration file
258 # protected are all packages that are still contained in
259 # another package configuration file
260 ghc-unregister-pkg() {
261 local localpkgconf="$(ghc-confdir)/$1"
262 local i
263 local pkg
264
265 if [[ -f "${localpkgconf}" ]]; then
266 for pkg in $(ghc-reverse "$(ghc-listpkg ${localpkgconf})"); do
267 if ! ghc-package-exists "${pkg}"; then
268 einfo "Package ${pkg} is not installed for ghc-$(ghc-version)."
269 else
270 ebegin "Unregistering ${pkg} "
271 $(ghc-getghcpkg) unregister "${pkg}" --force > /dev/null
272 eend $?
273 fi
274 done
275 fi
276 }
277
278 # @FUNCTION: ghc-reverse
279 # @DESCRIPTION:
280 # help-function: reverse a list
281 ghc-reverse() {
282 local result
283 local i
284 for i in $1; do
285 result="${i} ${result}"
286 done
287 echo "${result}"
288 }
289
290 # @FUNCTION: ghc-elem
291 # @DESCRIPTION:
292 # help-function: element-check
293 ghc-elem() {
294 local i
295 for i in $2; do
296 [[ "$1" == "${i}" ]] && return 0
297 done
298 return 1
299 }
300
301 # @FUNCTION: ghc-listpkg
302 # @DESCRIPTION:
303 # show the packages in a package configuration file
304 ghc-listpkg() {
305 local ghcpkgcall
306 local i
307 local extra_flags
308 if version_is_at_least '6.12.3' "$(ghc-version)"; then
309 extra_flags="${extra_flags} -v0"
310 fi
311 for i in $*; do
312 echo $($(ghc-getghcpkg) list ${extra_flags} -f "${i}") \
313 | sed \
314 -e "s|^.*${i}:\([^:]*\).*$|\1|" \
315 -e "s|/.*$||" \
316 -e "s|,| |g" -e "s|[(){}]||g"
317 done
318 }
319
320 # @FUNCTION: ghc-package_pkg_postinst
321 # @DESCRIPTION:
322 # exported function: registers the package-specific package
323 # configuration file
324 ghc-package_pkg_postinst() {
325 ghc-register-pkg "$(ghc-localpkgconf)"
326 }
327
328 # @FUNCTION: ghc-package_pkg_prerm
329 # @DESCRIPTION:
330 # exported function: unregisters the package-specific package
331 # configuration file; a package contained therein is unregistered
332 # only if it the same package is not also contained in another
333 # package configuration file ...
334 ghc-package_pkg_prerm() {
335 ghc-unregister-pkg "$(ghc-localpkgconf)"
336 }
337
338 EXPORT_FUNCTIONS pkg_postinst pkg_prerm

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