Add cabal.port.mk to more easily build haskell ports
Corrections by James Cook <falsifian@falsifian.org> ok kili, reviews by espie and sthen before
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gnezdo
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155
devel/cabal/cabal.port.mk
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155
devel/cabal/cabal.port.mk
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# $OpenBSD: cabal.port.mk,v 1.1 2021/02/26 03:30:53 gnezdo Exp $
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# Module for building Haskell programs with cabal-install.
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# Inspired by FreeBSD cabal.mk by Gleb Popov.
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# Input variables:
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#
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# MODCABAL_STEM - the name of the package on hackage.
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# MODCABAL_VERSION - the version of the package.
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# MODCABAL_MANIFEST - hackage dependencies required by this package, triples
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# of space separate <package> <version> <revision>. Typically generated
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# with cabal-bundler program from cabal-extras, e.g.
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# cabal-bundler --openbsd darcs-2.16.2
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# MODCABAL_DATA_DIR - data-dir from .cabal file (if the port needs the data)
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# https://cabal.readthedocs.io/en/latest/cabal-package.html#pkg-field-data-dir
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# MODCABAL_REVISION - Numeric revision of .cabal file on hackage if one is
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# needed on top of .cabal file contained in the .tar.gz file.
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# MODCABAL_BUILD_ARGS - passed to cabal v2-build, e.g. make MODCABAL_BUILD_ARGS=-v
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# is a nice debugging aid.
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# MODCABAL_FLAGS - passed to --flags= of cabal v2-build. Seemingly superfluous given
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# MODCABAL_BUILD_ARGS, but it is useful to keep this value separate as it
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# is used to generate the build plan and will be available without parsing.
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# MODCABAL_EXECUTABLES - Executable target in .cabal file, by default uses
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# the hackage package name.
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# https://cabal.readthedocs.io/en/latest/cabal-package.html#executables
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#
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# Available output variables:
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#
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# MODCABAL_BUILT_EXECUTABLE_${_exe} is built for each of MODCABAL_EXECUTABLES.
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# These are available for `make test` after `make build` phase.
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#
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# Special files:
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# files/cabal.project is used automatically.
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ONLY_FOR_ARCHS = i386 amd64
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BUILD_DEPENDS += devel/cabal-install>=3.4.0.0 \
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lang/ghc>=8.6.4
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# Takes over :9 site for hackage. The day when we have a port using
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# both Go/Rust and Hackage we'll have to resolve their common
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# insistance on grabbing :9.
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MASTER_SITES9 = https://hackage.haskell.org/package/
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DIST_SUBDIR ?= hackage
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# The .cabal files are explicitly copied over the ones extracted from
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# archives by the normal extraction rules.
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EXTRACT_CASES += *.cabal) ;;
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DISTNAME ?= ${MODCABAL_STEM}-${MODCABAL_VERSION}
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HOMEPAGE ?= ${MASTER_SITES9}${MODCABAL_STEM}
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MASTER_SITES ?= ${MASTER_SITES9}${DISTNAME}/
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DISTFILES ?= ${DISTNAME}.tar.gz
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SUBST_VARS += MODCABAL_STEM MODCABAL_VERSION PKGNAME
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# Oftentime our port name and the executable name coincide.
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MODCABAL_EXECUTABLES ?= ${MODCABAL_STEM}
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# Cabal won't download anything from hackage if config file exists.
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MODCABAL_post-extract = \
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mkdir -p ${WRKDIR}/.cabal \
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&& touch ${WRKDIR}/.cabal/config
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# Some packages need an updated .cabal file from hackage to overwrite
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# the one in the tar ball.
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.if defined(MODCABAL_REVISION)
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DISTFILES += ${DISTNAME}_${MODCABAL_REVISION}{revision/${MODCABAL_REVISION}}.cabal
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MODCABAL_post-extract += \
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&& cp ${FULLDISTDIR}/${DISTNAME}_${MODCABAL_REVISION}.cabal \
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${WRKSRC}/${MODCABAL_STEM}.cabal
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.endif
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# The dependent sources get downloaded from hackage.
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.for _package _version _revision in ${MODCABAL_MANIFEST}
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DISTFILES += {${_package}-${_version}/}${_package}-${_version}.tar.gz:9
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. if ${_revision} > 0
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DISTFILES += ${_package}-${_version}_${_revision}{${_package}-${_version}/revision/${_revision}}.cabal:9
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MODCABAL_post-extract += \
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&& cp ${FULLDISTDIR}/${_package}-${_version}_${_revision}.cabal \
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${WRKDIR}/${_package}-${_version}/${_package}.cabal
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. endif
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# References all the locally available dependencies. Ideally these
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# should be command line options, tracking issue:
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# https://github.com/haskell/cabal/issues/3585
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MODCABAL_post-extract += \
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&& echo "packages: ${WRKDIR}/${_package}-${_version}/${_package}.cabal" >> ${WRKSRC}/cabal.project.local
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.endfor # MODCABAL_MANIFEST
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# Automatically copies the cabal.project file if any.
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MODCABAL_post-extract += \
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&& (test -f ${FILESDIR}/cabal.project \
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&& cp -v ${FILESDIR}/cabal.project ${WRKSRC}; true)
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# Invokes cabal with HOME set up to use .cabal directory created in
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# post-extract.
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_MODCABAL_CABAL = ${SETENV} ${MAKE_ENV} HOME=${WRKDIR} ${LOCALBASE}/bin/cabal
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# Building a cabal package is merely an invocation of cabal v2-build.
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_MODCABAL_BUILD_TARGET = \
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cd ${WRKBUILD} \
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&& ${_MODCABAL_CABAL} v2-build --offline --disable-benchmarks --disable-tests \
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-w ${LOCALBASE}/bin/ghc \
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-j${MAKE_JOBS} \
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--flags="${MODCABAL_FLAGS}" ${MODCABAL_BUILD_ARGS} \
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${MODCABAL_EXECUTABLES:C/^/exe:&/}
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# Install fragment starts this way for uniformity of incremental construction.
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_MODCABAL_INSTALL_TARGET = true
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# Prepares wrapping fragments that only need to be set up once and
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# reused across potentially multiple installed executables.
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.if defined(MODCABAL_DATA_DIR)
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_MODCABAL_LIBEXEC = libexec/cabal
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_MODCABAL_INSTALL_TARGET += \
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&& mkdir -p ${PREFIX}/${_MODCABAL_LIBEXEC}
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_MODCABAL_INSTALL_TARGET += \
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&& ${INSTALL_DATA_DIR} ${WRKSRC}/${MODCABAL_DATA_DIR} ${PREFIX}/share/${DISTNAME} \
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&& cd ${WRKSRC}/${MODCABAL_DATA_DIR} && umask 022 && pax -rw . ${PREFIX}/share/${DISTNAME}
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.endif
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# Appends installation fragments for each executable.
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.for _exe in ${MODCABAL_EXECUTABLES}
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# Exports the path to the executable for testing. The location is
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# somewhat hard to predict in advance, thus it is determined at runtime.
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MODCABAL_BUILT_EXECUTABLE_${_exe} = $$(find ${WRKSRC}/dist-newstyle -name ${_exe} -type f -perm -a+x)
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. if defined(MODCABAL_DATA_DIR)
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# Installs the ELF binary into an auxiliary location and wraps it into
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# a script which sets up the environment to point at the data-dir
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# files if any.
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_MODCABAL_INSTALL_TARGET += \
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&& ${INSTALL_PROGRAM} \
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${MODCABAL_BUILT_EXECUTABLE_${_exe}} \
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${PREFIX}/${_MODCABAL_LIBEXEC}/${_exe} \
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&& echo '\#!/bin/sh' > ${PREFIX}/bin/${_exe} \
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&& echo 'export ${_exe}_datadir=${LOCALBASE}/share/${DISTNAME}' >> ${PREFIX}/bin/${_exe} \
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&& echo 'exec ${LOCALBASE}/${_MODCABAL_LIBEXEC}/${_exe} "$$@"' >> ${PREFIX}/bin/${_exe} \
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&& chmod +x ${STAGEDIR}${PREFIX}/bin/${_exe}
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. else
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# Skips the launcher script indirection when MODCABAL_DATA_DIR is empty.
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_MODCABAL_INSTALL_TARGET += \
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&& ${INSTALL_PROGRAM} ${MODCABAL_BUILT_EXECUTABLE_${_exe}} ${PREFIX}/bin
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. endif
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.endfor
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.if !target(do-build)
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do-build:
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@${_MODCABAL_BUILD_TARGET}
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.endif
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.if !target(do-install)
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do-install:
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@${_MODCABAL_INSTALL_TARGET}
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.endif
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