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Revision 1.30 - (show annotations) (download)
Sun May 8 15:00:43 2011 UTC (3 years, 3 months ago) by slyfox
Branch: MAIN
Changes since 1.29: +15 -16 lines
speed up package deregistration, add 'ghc-supports-shared-libraries' helper

- 'pkg_prerm' could take up to minute in a loop of checking protected packages.
  We don't need to protect anything on modern ghc (6.12+)

- ghc-supports-shared-libraries returns success if installed ghc is able to
  build shared objects

1 # Copyright 1999-2011 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 # @ECLASS: ghc-package.eclass
6 # @MAINTAINER:
7 # "Gentoo's Haskell Language team" <haskell@gentoo.org>
8 #
9 # Original Author: Andres Loeh <kosmikus@gentoo.org>
10 #
11 # @BLURB: This eclass helps with the Glasgow Haskell Compiler's package configuration utility.
12 # @DESCRIPTION:
13 # Helper eclass to handle ghc installation/upgrade/deinstallation process.
14
15 inherit versionator
16
17 # @FUNCTION: ghc-getghc
18 # @DESCRIPTION:
19 # returns the name of the ghc executable
20 ghc-getghc() {
21 type -P ghc
22 }
23
24 # @FUNCTION: ghc-getghcpkg
25 # @DESCRIPTION:
26 # Internal function determines returns the name of the ghc-pkg executable
27 ghc-getghcpkg() {
28 type -P ghc-pkg
29 }
30
31 # @FUNCTION: ghc-getghcpkgbin
32 # @DESCRIPTION:
33 # returns the name of the ghc-pkg binary (ghc-pkg
34 # itself usually is a shell script, and we have to
35 # bypass the script under certain circumstances);
36 # for Cabal, we add an empty global package config file,
37 # because for some reason the global package file
38 # must be specified
39 ghc-getghcpkgbin() {
40 if version_is_at_least "6.10" "$(ghc-version)"; then
41 # the ghc-pkg executable changed name in ghc 6.10, as it no longer needs
42 # the wrapper script with the static flags
43 echo '[]' > "${T}/empty.conf"
44 echo "$(ghc-libdir)/ghc-pkg" "--global-conf=${T}/empty.conf"
45 elif ghc-cabal; then
46 echo '[]' > "${T}/empty.conf"
47 echo "$(ghc-libdir)/ghc-pkg.bin" "--global-conf=${T}/empty.conf"
48 else
49 echo "$(ghc-libdir)/ghc-pkg.bin"
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-cabal
65 # @DESCRIPTION:
66 # this function can be used to determine if ghc itself
67 # uses the Cabal package format; it has nothing to do
68 # with the Cabal libraries ... ghc uses the Cabal package
69 # format since version 6.4
70 ghc-cabal() {
71 version_is_at_least "6.4" "$(ghc-version)"
72 }
73
74 # @FUNCTION: ghc-bestcabalversion
75 # @DESCRIPTION:
76 # return the best version of the Cabal library that is available
77 ghc-bestcabalversion() {
78 local cabalversion
79 if ghc-cabal; then
80 # We ask portage, not ghc, so that we only pick up
81 # portage-installed cabal versions.
82 cabalversion="$(ghc-extractportageversion dev-haskell/cabal)"
83 echo "Cabal-${cabalversion}"
84 else
85 # older ghc's don't support package versioning
86 echo Cabal
87 fi
88 }
89
90 # @FUNCTION: ghc-sanecabal
91 # @DESCRIPTION:
92 # check if a standalone Cabal version is available for the
93 # currently used ghc; takes minimal version of Cabal as
94 # an optional argument
95 ghc-sanecabal() {
96 local f
97 local version
98 if [[ -z "$1" ]]; then version="1.0.1"; else version="$1"; fi
99 for f in $(ghc-confdir)/cabal-*; do
100 [[ -f "${f}" ]] && version_is_at_least "${version}" "${f#*cabal-}" && return
101 done
102 return 1
103 }
104
105 # @FUNCTION: ghc-saneghc
106 # @DESCRIPTION:
107 # checks if ghc and ghc-bin are installed in the same version
108 # (if they're both installed); if this is not the case, we
109 # unfortunately cannot trust portage's dependency resolution
110 ghc-saneghc() {
111 local ghcversion
112 local ghcbinversion
113 if [[ "${PN}" == "ghc" || "${PN}" == "ghc-bin" ]]; then
114 return
115 fi
116 if has_version dev-lang/ghc && has_version dev-lang/ghc-bin; then
117 ghcversion="$(ghc-extractportageversion dev-lang/ghc)"
118 ghcbinversion="$(ghc-extractportageversion dev-lang/ghc-bin)"
119 if [[ "${ghcversion}" != "${ghcbinversion}" ]]; then
120 return 1
121 fi
122 fi
123 return
124 }
125
126 # @FUNCTION: ghc-supports-shared-libraries
127 # @DESCRIPTION:
128 # checks if ghc is built with support for building
129 # shared libraries (aka '-dynamic' option)
130 ghc-supports-shared-libraries() {
131 $(ghc-getghc) --info | grep "RTS ways" | grep -q "dyn"
132 }
133
134 # @FUNCTION: ghc-extractportageversion
135 # @DESCRIPTION:
136 # extract the version of a portage-installed package
137 ghc-extractportageversion() {
138 local pkg
139 local version
140 pkg="$(best_version $1)"
141 version="${pkg#$1-}"
142 version="${version%-r*}"
143 version="${version%_pre*}"
144 echo "${version}"
145 }
146
147 # @FUNCTION: ghc-libdir
148 # @DESCRIPTION:
149 # returns the library directory
150 _GHC_LIBDIR_CACHE=""
151 ghc-libdir() {
152 if [[ -z "${_GHC_LIBDIR_CACHE}" ]]; then
153 _GHC_LIBDIR_CACHE="$($(ghc-getghc) --print-libdir)"
154 fi
155 echo "${_GHC_LIBDIR_CACHE}"
156 }
157
158 # @FUNCTION: ghc-confdir
159 # @DESCRIPTION:
160 # returns the (Gentoo) library configuration directory
161 ghc-confdir() {
162 echo "$(ghc-libdir)/gentoo"
163 }
164
165 # @FUNCTION: ghc-localpkgconf
166 # @DESCRIPTION:
167 # returns the name of the local (package-specific)
168 # package configuration file
169 ghc-localpkgconf() {
170 echo "${PF}.conf"
171 }
172
173 # @FUNCTION: ghc-makeghcilib
174 # @DESCRIPTION:
175 # make a ghci foo.o file from a libfoo.a file
176 ghc-makeghcilib() {
177 local outfile
178 outfile="$(dirname $1)/$(basename $1 | sed 's:^lib\?\(.*\)\.a$:\1.o:')"
179 ld --relocatable --discard-all --output="${outfile}" --whole-archive "$1"
180 }
181
182 # @FUNCTION: ghc-makeghcilib
183 # @DESCRIPTION:
184 # tests if a ghc package exists
185 ghc-package-exists() {
186 local describe_flag
187 if version_is_at_least "6.4" "$(ghc-version)"; then
188 describe_flag="describe"
189 else
190 describe_flag="--show-package"
191 fi
192
193 $(ghc-getghcpkg) "${describe_flag}" "$1" > /dev/null 2>&1
194 }
195
196 # @FUNCTION: ghc-setup-pkg
197 # @DESCRIPTION:
198 # creates a local (package-specific) package
199 # configuration file; the arguments should be
200 # uninstalled package description files, each
201 # containing a single package description; if
202 # no arguments are given, the resulting file is
203 # empty
204 ghc-setup-pkg() {
205 local localpkgconf
206 localpkgconf="${S}/$(ghc-localpkgconf)"
207 echo '[]' > "${localpkgconf}"
208 local update_flag
209 if version_is_at_least "6.4" "$(ghc-version)"; then
210 update_flag="update -"
211 else
212 update_flag="--update-package"
213 fi
214 for pkg in $*; do
215 $(ghc-getghcpkgbin) -f "${localpkgconf}" ${update_flag} --force \
216 < "${pkg}" || die "failed to register ${pkg}"
217 done
218 }
219
220 # @FUNCTION: ghc-fixlibpath
221 # @DESCRIPTION:
222 # fixes the library and import directories path
223 # of the package configuration file
224 ghc-fixlibpath() {
225 sed -i "s|$1|$(ghc-libdir)|g" "${S}/$(ghc-localpkgconf)"
226 if [[ -n "$2" ]]; then
227 sed -i "s|$2|$(ghc-libdir)/imports|g" "${S}/$(ghc-localpkgconf)"
228 fi
229 }
230
231 # @FUNCTION: ghc-install-pkg
232 # @DESCRIPTION:
233 # moves the local (package-specific) package configuration
234 # file to its final destination
235 ghc-install-pkg() {
236 mkdir -p "${D}/$(ghc-confdir)"
237 cat "${S}/$(ghc-localpkgconf)" | sed "s|${D}||g" \
238 > "${D}/$(ghc-confdir)/$(ghc-localpkgconf)"
239 }
240
241 # @FUNCTION: ghc-register-pkg
242 # @DESCRIPTION:
243 # registers all packages in the local (package-specific)
244 # package configuration file
245 ghc-register-pkg() {
246 local localpkgconf
247 localpkgconf="$(ghc-confdir)/$1"
248 local update_flag
249 local describe_flag
250 if version_is_at_least "6.4" "$(ghc-version)"; then
251 update_flag="update -"
252 describe_flag="describe"
253 else
254 update_flag="--update-package"
255 describe_flag="--show-package"
256 fi
257 if [[ -f "${localpkgconf}" ]]; then
258 for pkg in $(ghc-listpkg "${localpkgconf}"); do
259 ebegin "Registering ${pkg} "
260 $(ghc-getghcpkgbin) -f "${localpkgconf}" "${describe_flag}" "${pkg}" \
261 | $(ghc-getghcpkg) ${update_flag} --force > /dev/null
262 eend $?
263 done
264 fi
265 }
266
267 # @FUNCTION: ghc-reregister
268 # @DESCRIPTION:
269 # re-adds all available .conf files to the global
270 # package conf file, to be used on a ghc reinstallation
271 ghc-reregister() {
272 has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
273 einfo "Re-adding packages (may cause several harmless warnings) ..."
274 PATH="${EPREFIX}/usr/bin:${PATH}" CONFDIR="$(ghc-confdir)"
275 if [ -d "${CONFDIR}" ]; then
276 pushd "${CONFDIR}" > /dev/null
277 for conf in *.conf; do
278 PATH="${EPREFIX}/usr/bin:${PATH}" ghc-register-pkg "${conf}"
279 done
280 popd > /dev/null
281 fi
282 }
283
284 # @FUNCTION: ghc-unregister-pkg
285 # @DESCRIPTION:
286 # unregisters a package configuration file
287 # protected are all packages that are still contained in
288 # another package configuration file
289 ghc-unregister-pkg() {
290 local localpkgconf
291 local i
292 local pkg
293 local unregister_flag
294 localpkgconf="$(ghc-confdir)/$1"
295
296 if version_is_at_least "6.4" "$(ghc-version)"; then
297 unregister_flag="unregister"
298 else
299 unregister_flag="--remove-package"
300 fi
301
302 if [[ -f "${localpkgconf}" ]]; then
303 for pkg in $(ghc-reverse "$(ghc-listpkg ${localpkgconf})"); do
304 if ! ghc-package-exists "${pkg}"; then
305 einfo "Package ${pkg} is not installed for ghc-$(ghc-version)."
306 else
307 ebegin "Unregistering ${pkg} "
308 $(ghc-getghcpkg) "${unregister_flag}" "${pkg}" --force > /dev/null
309 eend $?
310 fi
311 done
312 fi
313 }
314
315 # @FUNCTION: ghc-reverse
316 # @DESCRIPTION:
317 # help-function: reverse a list
318 ghc-reverse() {
319 local result
320 local i
321 for i in $1; do
322 result="${i} ${result}"
323 done
324 echo "${result}"
325 }
326
327 # @FUNCTION: ghc-elem
328 # @DESCRIPTION:
329 # help-function: element-check
330 ghc-elem() {
331 local i
332 for i in $2; do
333 [[ "$1" == "${i}" ]] && return 0
334 done
335 return 1
336 }
337
338 # @FUNCTION: ghc-listpkg
339 # @DESCRIPTION:
340 # show the packages in a package configuration file
341 ghc-listpkg() {
342 local ghcpkgcall
343 local i
344 local extra_flags
345 if version_is_at_least '6.12.3' "$(ghc-version)"; then
346 extra_flags="${extra_flags} -v0"
347 fi
348 for i in $*; do
349 if ghc-cabal; then
350 echo $($(ghc-getghcpkg) list ${extra_flags} -f "${i}") \
351 | sed \
352 -e "s|^.*${i}:\([^:]*\).*$|\1|" \
353 -e "s|/.*$||" \
354 -e "s|,| |g" -e "s|[(){}]||g"
355 else
356 echo $($(ghc-getghcpkgbin) -l -f "${i}") \
357 | cut -f2 -d':' \
358 | sed 's:,: :g'
359 fi
360 done
361 }
362
363 # @FUNCTION: ghc-package_pkg_setup
364 # @DESCRIPTION:
365 # exported function: check if we have a consistent ghc installation
366 ghc-package_pkg_setup() {
367 if ! ghc-saneghc; then
368 eerror "You have inconsistent versions of dev-lang/ghc and dev-lang/ghc-bin"
369 eerror "installed. Portage currently cannot work correctly with this setup."
370 eerror "There are several possibilities to work around this problem:"
371 eerror "(1) Up/downgrade ghc-bin to the same version as ghc."
372 eerror "(2) Unmerge ghc-bin."
373 eerror "(3) Unmerge ghc."
374 eerror "You probably want option 1 or 2."
375 die "Inconsistent versions of ghc and ghc-bin."
376 fi
377 }
378
379 # @FUNCTION: ghc-package_pkg_postinst
380 # @DESCRIPTION:
381 # exported function: registers the package-specific package
382 # configuration file
383 ghc-package_pkg_postinst() {
384 ghc-register-pkg "$(ghc-localpkgconf)"
385 }
386
387 # @FUNCTION: ghc-package_pkg_prerm
388 # @DESCRIPTION:
389 # exported function: unregisters the package-specific package
390 # configuration file; a package contained therein is unregistered
391 # only if it the same package is not also contained in another
392 # package configuration file ...
393 ghc-package_pkg_prerm() {
394 ghc-unregister-pkg "$(ghc-localpkgconf)"
395 }
396
397 EXPORT_FUNCTIONS pkg_setup pkg_postinst pkg_prerm

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