gentoo-x86/eclass/ghc-package.eclass

# Copyright 1999-2004 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/ghc-package.eclass,v 1.7 2005/03/23 13:55:06 kosmikus Exp $
#
# Author: Andres Loeh <kosmikus@gentoo.org>
#
# This eclass helps with the Glasgow Haskell Compiler's package
# configuration utility.

inherit versionator

ECLASS="ghc-package"
INHERITED="${INHERITED} ${ECLASS}"

# promote /opt/ghc/bin to a better position in the search path
PATH="/usr/bin:/opt/ghc/bin:${PATH}"

# for later configuration using environment variables/
# returns the name of the ghc executable
ghc-getghc() {
        echo "ghc"
}

# returns the name of the ghc-pkg executable
ghc-getghcpkg() {
        echo "ghc-pkg"
}

# returns the name of the ghc-pkg binary (ghc-pkg
# itself usually is a shell script, and we have to
# bypass the script under certain circumstances);
# for Cabal, we add the global package config file,
# because for some reason that's required
ghc-getghcpkgbin() {
        if ghc-cabal; then
                echo $(ghc-libdir)/"ghc-pkg.bin" "--global-conf=$(ghc-libdir)/package.conf"
        else
                echo $(ghc-libdir)/"ghc-pkg.bin"
        fi
}

# returns the version of ghc
_GHC_VERSION_CACHE=""
ghc-version() {
        if [[ -z "${_GHC_VERSION_CACHE}" ]]; then
                _GHC_VERSION_CACHE="$($(ghc-getghc) --version | sed 's:^.*version ::')"
        fi
        echo "${_GHC_VERSION_CACHE}"
}

# returns true for ghc >= 6.4
ghc-cabal() {
        version_is_at_least "6.4" "$(ghc-version)"
}

# returns the library directory
_GHC_LIBDIR_CACHE=""
ghc-libdir() {
        if [[ -z "${_GHC_LIBDIR_CACHE}" ]]; then
                _GHC_LIBDIR_CACHE="$($(ghc-getghc) --print-libdir)"
        fi
        echo "${_GHC_LIBDIR_CACHE}"
}

# returns the (Gentoo) library configuration directory
ghc-confdir() {
        echo $(ghc-libdir)/gentoo
}

# returns the name of the local (package-specific)
# package configuration file
ghc-localpkgconf() {
        echo "${PF}.conf"
}

# make a ghci foo.o file from a libfoo.a file
ghc-makeghcilib() {
        local outfile
        outfile="$(dirname $1)/$(basename $1 | sed 's:^lib\?\(.*\)\.a$:\1.o:')"
        ld --relocatable --discard-all --output="${outfile}" --whole-archive $1
}

# creates a local (package-specific) package
# configuration file; the arguments should be
# uninstalled package description files, each
# containing a single package description; if
# no arguments are given, the resulting file is
# empty
ghc-setup-pkg() {
        local localpkgconf
        localpkgconf="${S}/$(ghc-localpkgconf)"
        echo '[' > ${localpkgconf}
        while [ -n "$1" ]; do
                cat "$1" >> ${localpkgconf}
                shift
                [ -n "$1" ] && echo ',' >> ${localpkgconf}
        done
        echo ']' >> ${localpkgconf}
}

# moves the local (package-specific) package configuration
# file to its final destination
ghc-install-pkg() {
        mkdir -p ${D}/$(ghc-confdir)
        cat ${S}/$(ghc-localpkgconf) | sed "s:${D}::" \
                > ${D}/$(ghc-confdir)/$(ghc-localpkgconf)
}

# registers all packages in the local (package-specific)
# package configuration file
ghc-register-pkg() {
        local localpkgconf
        localpkgconf="$(ghc-confdir)/$1"
        if [[ -f ${localpkgconf} ]]; then
                for pkg in $(ghc-listpkg ${localpkgconf}); do
                        ebegin "Registering ${pkg} "
                        $(ghc-getghcpkgbin) -f ${localpkgconf} -s ${pkg} \
                                | $(ghc-getghcpkg) -u --force > /dev/null
                        eend $?
                done
        fi
}

# re-adds all available .conf files to the global
# package conf file, to be used on a ghc reinstallation
ghc-reregister() {
        einfo "Re-adding packages ..."
        einfo "(This may cause several warnings, but they should be harmless.)"
        if [ -d "$(ghc-confdir)" ]; then
                pushd $(ghc-confdir) > /dev/null
                for conf in *.conf; do
                        einfo "Processing ${conf} ..."
                        ghc-register-pkg ${conf}
                done
                popd > /dev/null
        fi
}

# unregisters ...
ghc-unregister-pkg() {
        local localpkgconf
        localpkgconf="$(ghc-confdir)/$1"
        if [[ -f ${localpkgconf} ]]; then
                for pkg in $(ghc-reverse "$(ghc-listpkg ${localpkgconf})"); do
                        ebegin "Unregistering ${pkg} "
                        $(ghc-getghcpkg) -r ${pkg} --force > /dev/null
                        eend $?
                done
        fi
}

# help-function: reverse a list
ghc-reverse() {
        local result
        for i in $1; do
                result="${i} ${result}"
        done
        echo ${result}
}

# show the packages in a package configuration file
ghc-listpkg() {
        local ghcpkgcall
        if ghc-cabal; then
                echo $($(ghc-getghcpkg) list -f $1) \
                        | sed \
                                -e "s|^.*${f}:\([^:]*\).*$|\1|" \
                                -e "s|/.*$||" \
                                -e "s|,| |g" -e "s|[()]||g"
        else
                echo $($(ghc-getghcpkgbin) -l -f $1) \
                        | cut -f2 -d':' \
                        | sed 's:,: :g'
        fi
}

# exported function: registers the package-specific package
# configuration file
ghc-package_pkg_postinst() {
        ghc-register-pkg $(ghc-localpkgconf)
}

# exported function: unregisters the package-specific
# package configuration file, under the condition that
# after removal, no other instances of the package will
# be left (necessary check because ghc packages are not
# versioned)
ghc-package_pkg_prerm() {
        has_version "<${CATEGORY}/${PF}" || has_version ">${CATEGORY}/${PF}" \
                || ghc-unregister-pkg $(ghc-localpkgconf)
}

EXPORT_FUNCTIONS pkg_postinst pkg_prerm
1	kosmikus	1.1	# Copyright 1999-2004 Gentoo Foundation
2			# Distributed under the terms of the GNU General Public License v2
3	kosmikus	1.8	# $Header: /var/cvsroot/gentoo-x86/eclass/ghc-package.eclass,v 1.7 2005/03/23 13:55:06 kosmikus Exp $
4	kosmikus	1.1	#
5			# Author: Andres Loeh <kosmikus@gentoo.org>
6			#
7			# This eclass helps with the Glasgow Haskell Compiler's package
8			# configuration utility.
9
10	kosmikus	1.6	inherit versionator
11
12	kosmikus	1.1	ECLASS="ghc-package"
13	kosmikus	1.6	INHERITED="${INHERITED} ${ECLASS}"
14	kosmikus	1.1
15	kosmikus	1.7	# promote /opt/ghc/bin to a better position in the search path
16			PATH="/usr/bin:/opt/ghc/bin:${PATH}"
17	kosmikus	1.1
18			# for later configuration using environment variables/
19			# returns the name of the ghc executable
20			ghc-getghc() {
21			echo "ghc"
22			}
23
24			# returns the name of the ghc-pkg executable
25			ghc-getghcpkg() {
26			echo "ghc-pkg"
27			}
28
29			# returns the name of the ghc-pkg binary (ghc-pkg
30			# itself usually is a shell script, and we have to
31	kosmikus	1.6	# bypass the script under certain circumstances);
32			# for Cabal, we add the global package config file,
33			# because for some reason that's required
34	kosmikus	1.1	ghc-getghcpkgbin() {
35	kosmikus	1.6	if ghc-cabal; then
36			echo $(ghc-libdir)/"ghc-pkg.bin" "--global-conf=$(ghc-libdir)/package.conf"
37			else
38			echo $(ghc-libdir)/"ghc-pkg.bin"
39			fi
40	kosmikus	1.1	}
41
42			# returns the version of ghc
43	kosmikus	1.6	_GHC_VERSION_CACHE=""
44	kosmikus	1.1	ghc-version() {
45	kosmikus	1.6	if [[ -z "${_GHC_VERSION_CACHE}" ]]; then
46			_GHC_VERSION_CACHE="$($(ghc-getghc) --version \| sed 's:^.*version ::')"
47			fi
48			echo "${_GHC_VERSION_CACHE}"
49			}
50
51			# returns true for ghc >= 6.4
52			ghc-cabal() {
53			version_is_at_least "6.4" "$(ghc-version)"
54	kosmikus	1.1	}
55
56			# returns the library directory
57	kosmikus	1.6	_GHC_LIBDIR_CACHE=""
58	kosmikus	1.1	ghc-libdir() {
59	kosmikus	1.6	if [[ -z "${_GHC_LIBDIR_CACHE}" ]]; then
60			_GHC_LIBDIR_CACHE="$($(ghc-getghc) --print-libdir)"
61			fi
62			echo "${_GHC_LIBDIR_CACHE}"
63	kosmikus	1.1	}
64
65			# returns the (Gentoo) library configuration directory
66			ghc-confdir() {
67			echo $(ghc-libdir)/gentoo
68			}
69
70			# returns the name of the local (package-specific)
71			# package configuration file
72			ghc-localpkgconf() {
73			echo "${PF}.conf"
74			}
75
76	kosmikus	1.3	# make a ghci foo.o file from a libfoo.a file
77			ghc-makeghcilib() {
78			local outfile
79			outfile="$(dirname $1)/$(basename $1 \| sed 's:^lib\?\(.*\)\.a$:\1.o:')"
80	kosmikus	1.4	ld --relocatable --discard-all --output="${outfile}" --whole-archive $1
81	kosmikus	1.3	}
82
83			# creates a local (package-specific) package
84			# configuration file; the arguments should be
85			# uninstalled package description files, each
86			# containing a single package description; if
87			# no arguments are given, the resulting file is
88			# empty
89	kosmikus	1.1	ghc-setup-pkg() {
90	kosmikus	1.3	local localpkgconf
91			localpkgconf="${S}/$(ghc-localpkgconf)"
92			echo '[' > ${localpkgconf}
93			while [ -n "$1" ]; do
94			cat "$1" >> ${localpkgconf}
95			shift
96			[ -n "$1" ] && echo ',' >> ${localpkgconf}
97			done
98			echo ']' >> ${localpkgconf}
99	kosmikus	1.1	}
100
101			# moves the local (package-specific) package configuration
102			# file to its final destination
103			ghc-install-pkg() {
104			mkdir -p ${D}/$(ghc-confdir)
105			cat ${S}/$(ghc-localpkgconf) \| sed "s:${D}::" \
106			> ${D}/$(ghc-confdir)/$(ghc-localpkgconf)
107			}
108
109			# registers all packages in the local (package-specific)
110			# package configuration file
111			ghc-register-pkg() {
112			local localpkgconf
113	kosmikus	1.3	localpkgconf="$(ghc-confdir)/$1"
114	kosmikus	1.7	if [[ -f ${localpkgconf} ]]; then
115			for pkg in $(ghc-listpkg ${localpkgconf}); do
116	kosmikus	1.8	ebegin "Registering ${pkg} "
117	kosmikus	1.7	$(ghc-getghcpkgbin) -f ${localpkgconf} -s ${pkg} \
118	kosmikus	1.8	\| $(ghc-getghcpkg) -u --force > /dev/null
119			eend $?
120	kosmikus	1.7	done
121			fi
122	kosmikus	1.1	}
123
124			# re-adds all available .conf files to the global
125			# package conf file, to be used on a ghc reinstallation
126			ghc-reregister() {
127			einfo "Re-adding packages ..."
128	kosmikus	1.8	einfo "(This may cause several warnings, but they should be harmless.)"
129	kosmikus	1.5	if [ -d "$(ghc-confdir)" ]; then
130	kosmikus	1.8	pushd $(ghc-confdir) > /dev/null
131	kosmikus	1.5	for conf in *.conf; do
132			einfo "Processing ${conf} ..."
133			ghc-register-pkg ${conf}
134			done
135	kosmikus	1.8	popd > /dev/null
136	kosmikus	1.5	fi
137	kosmikus	1.1	}
138
139			# unregisters ...
140			ghc-unregister-pkg() {
141			local localpkgconf
142	kosmikus	1.3	localpkgconf="$(ghc-confdir)/$1"
143	kosmikus	1.7	if [[ -f ${localpkgconf} ]]; then
144			for pkg in $(ghc-reverse "$(ghc-listpkg ${localpkgconf})"); do
145	kosmikus	1.8	ebegin "Unregistering ${pkg} "
146			$(ghc-getghcpkg) -r ${pkg} --force > /dev/null
147			eend $?
148	kosmikus	1.7	done
149			fi
150	kosmikus	1.1	}
151
152			# help-function: reverse a list
153			ghc-reverse() {
154			local result
155			for i in $1; do
156			result="${i} ${result}"
157			done
158			echo ${result}
159			}
160
161			# show the packages in a package configuration file
162			ghc-listpkg() {
163	kosmikus	1.6	local ghcpkgcall
164			if ghc-cabal; then
165			echo $($(ghc-getghcpkg) list -f $1) \
166			\| sed \
167			-e "s\|^.${f}:\([^:]\).*$\|\1\|" \
168			-e "s\|/.*$\|\|" \
169			-e "s\|,\| \|g" -e "s\|[()]\|\|g"
170			else
171			echo $($(ghc-getghcpkgbin) -l -f $1) \
172	kosmikus	1.1	\| cut -f2 -d':' \
173			\| sed 's:,: :g'
174	kosmikus	1.6	fi
175	kosmikus	1.1	}
176
177			# exported function: registers the package-specific package
178			# configuration file
179			ghc-package_pkg_postinst() {
180			ghc-register-pkg $(ghc-localpkgconf)
181			}
182
183			# exported function: unregisters the package-specific
184			# package configuration file, under the condition that
185			# after removal, no other instances of the package will
186			# be left (necessary check because ghc packages are not
187			# versioned)
188			ghc-package_pkg_prerm() {
189			has_version "<${CATEGORY}/${PF}" \|\| has_version ">${CATEGORY}/${PF}" \
190			\|\| ghc-unregister-pkg $(ghc-localpkgconf)
191			}
192
193			EXPORT_FUNCTIONS pkg_postinst pkg_prerm