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69 lines
2.5 KiB
Ruby
69 lines
2.5 KiB
Ruby
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module Language
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module Haskell
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# module for formulas using cabal-install as build tool
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module Cabal
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def cabal_sandbox
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pwd = Pathname.pwd
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# force cabal to put its stuff here instead of the home directory by
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# pretending the home is here. This also avoid to deal with many options
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# to configure cabal. Note this is also useful with cabal sandbox to
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# avoid touching ~/.cabal
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home = ENV["HOME"]
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ENV["HOME"] = pwd
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# use cabal's sandbox feature if available
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cabal_version = `cabal --version`[/[0-9.]+/].split('.').collect(&:to_i)
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if (cabal_version <=> [1, 20]) > -1
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system "cabal", "sandbox", "init"
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cabal_sandbox_bin = pwd/".cabal-sandbox/bin"
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else
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# no or broken sandbox feature - just use the HOME trick
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cabal_sandbox_bin = pwd/".cabal/bin"
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end
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# cabal may build useful tools that should be found in the PATH
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mkdir_p cabal_sandbox_bin
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path = ENV["PATH"]
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ENV.prepend_path 'PATH', cabal_sandbox_bin
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# update cabal package database
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system "cabal", "update"
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yield
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# restore the environment
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if (cabal_version <=> [1, 20]) > -1
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system "cabal", "sandbox", "delete"
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end
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ENV["HOME"] = home
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ENV["PATH"] = path
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end
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def cabal_install(*opts)
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system "cabal", "install", "--jobs=#{ENV.make_jobs}", *opts
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end
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# install the tools passed in parameter and remove the packages that where
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# used so they won't be in the way of the dependency solver for the main
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# package. The tools are installed sequentially in order to make possible
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# to install several tools that depends on each other
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def cabal_install_tools(*opts)
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opts.each {|t| cabal_install t}
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rm_rf Dir[".cabal*/*packages.conf.d/"]
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end
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# remove the development files from the lib directory. cabal-install should
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# be used instead to install haskell packages
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def cabal_clean_lib
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# a better approach may be needed here
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rm_rf lib
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end
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def install_cabal_package
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cabal_sandbox do
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# the dependencies are built first and installed locally, and only the
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# current package is actually installed in the destination dir
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cabal_install "--only-dependencies"
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cabal_install "--prefix=#{prefix}"
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end
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cabal_clean_lib
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end
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end
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end
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end
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