1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
module Language
module Haskell
# module for formulas using cabal-install as build tool
module Cabal
def cabal_sandbox
pwd = Pathname.pwd
# force cabal to put its stuff here instead of the home directory by
# pretending the home is here. This also avoid to deal with many options
# to configure cabal. Note this is also useful with cabal sandbox to
# avoid touching ~/.cabal
home = ENV["HOME"]
ENV["HOME"] = pwd
# use cabal's sandbox feature if available
cabal_version = `cabal --version`[/[0-9.]+/].split('.').collect(&:to_i)
if (cabal_version <=> [1, 20]) > -1
system "cabal", "sandbox", "init"
cabal_sandbox_bin = pwd/".cabal-sandbox/bin"
else
# no or broken sandbox feature - just use the HOME trick
cabal_sandbox_bin = pwd/".cabal/bin"
end
# cabal may build useful tools that should be found in the PATH
mkdir_p cabal_sandbox_bin
path = ENV["PATH"]
ENV.prepend_path 'PATH', cabal_sandbox_bin
# update cabal package database
system "cabal", "update"
yield
# restore the environment
if (cabal_version <=> [1, 20]) > -1
system "cabal", "sandbox", "delete"
end
ENV["HOME"] = home
ENV["PATH"] = path
end
def cabal_install(*opts)
system "cabal", "install", "--jobs=#{ENV.make_jobs}", *opts
end
# install the tools passed in parameter and remove the packages that where
# used so they won't be in the way of the dependency solver for the main
# package. The tools are installed sequentially in order to make possible
# to install several tools that depends on each other
def cabal_install_tools(*opts)
opts.each {|t| cabal_install t}
rm_rf Dir[".cabal*/*packages.conf.d/"]
end
# remove the development files from the lib directory. cabal-install should
# be used instead to install haskell packages
def cabal_clean_lib
# a better approach may be needed here
rm_rf lib
end
def install_cabal_package args=[]
cabal_sandbox do
# the dependencies are built first and installed locally, and only the
# current package is actually installed in the destination dir
cabal_install "--only-dependencies", *args
cabal_install "--prefix=#{prefix}", *args
end
cabal_clean_lib
end
end
end
end
|
