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require 'ostruct'
require 'formula'
require 'vendor/multi_json'
# Inherit from OpenStruct to gain a generic initialization method that takes a
# hash and creates an attribute for each key and value. `Tab.new` probably
# should not be called directly, instead use one of the class methods like
# `Tab.for_install`.
class Tab < OpenStruct
def self.for_install f, args
sha = `cd '#{HOMEBREW_REPOSITORY}' && git rev-parse --verify -q HEAD 2>/dev/null`.chuzzle
Tab.new :used_options => args.used_options(f),
:unused_options => args.unused_options(f),
:tabfile => f.prefix + "INSTALL_RECEIPT.json",
:built_as_bottle => !!args.build_bottle?,
:tapped_from => f.tap,
:time => Time.now.to_i, # to_s would be better but Ruby has no from_s function :P
:HEAD => sha
end
def self.from_file path
tab = Tab.new MultiJson.decode(open(path).read)
tab.tabfile = path
return tab
end
def self.for_keg keg
path = keg+'INSTALL_RECEIPT.json'
if path.exist?
self.from_file path
else
begin
self.dummy_tab Formula.factory(keg.parent.basename)
rescue FormulaUnavailableError
Tab.new :used_options => [],
:unused_options => [],
:built_as_bottle => false,
:tapped_from => "",
:time => nil,
:HEAD => nil
end
end
end
def self.for_formula f
f = Formula.factory f unless f.kind_of? Formula
path = f.linked_keg/'INSTALL_RECEIPT.json'
if path.exist?
self.from_file path
else
# Really should bail out with an error if a formula was not installed
# with a Tab. However, there will be lots of legacy installs that have no
# receipt---so we fabricate one that claims the formula was installed with
# no options.
#
# TODO:
# This isn't the best behavior---perhaps a future version of Homebrew can
# treat missing Tabs as errors.
self.dummy_tab f
end
end
def self.dummy_tab f
Tab.new :used_options => [],
:unused_options => f.build.as_flags,
:built_as_bottle => false,
:tapped_from => "",
:time => nil,
:HEAD => nil
end
def installed_with? opt
used_options.include? opt
end
def options
used_options + unused_options
end
def to_json
MultiJson.encode({
:used_options => used_options,
:unused_options => unused_options,
:built_as_bottle => built_as_bottle,
:tapped_from => tapped_from,
:time => time,
:HEAD => send("HEAD")})
end
def write
tabfile.write to_json
end
end
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