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#
# Author:: Joshua Timberman (<joshua@getchef.com>)
# Author:: Graeme Mathieson (<mathie@woss.name>)
#
# Copyright 2011-2013, Opscode, Inc.
# Copyright 2014, Chef Software, Inc <legal@getchef.com>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Ported from the homebrew cookbook's Homebrew::Mixin owner helpers
#
# This lives here in Chef::Mixin because Chef's namespacing makes it
# awkward to use modules elsewhere (e.g., chef/provider/package/homebrew/owner)
require 'chef/mixin/shell_out'
require 'etc'
class Chef
module Mixin
module HomebrewUser
include Chef::Mixin::ShellOut
##
# This tries to find the user to execute brew as. If a user is provided, that overrides the brew
# executable user. It is an error condition if the brew executable owner is root or we cannot find
# the brew executable.
def find_homebrew_uid(provided_user = nil)
# They could provide us a user name or a UID
if provided_user
return provided_user if provided_user.is_a? Integer
return Etc.getpwnam(provided_user).uid
end
@homebrew_owner ||= calculate_owner
@homebrew_owner
end
private
def calculate_owner
default_brew_path = '/usr/local/bin/brew'
if ::File.exist?(default_brew_path)
# By default, this follows symlinks which is what we want
owner = ::File.stat(default_brew_path).uid
elsif (brew_path = shell_out("which brew").stdout.strip) && !brew_path.empty?
owner = ::File.stat(brew_path).uid
else
raise Chef::Exceptions::CannotDetermineHomebrewOwner,
'Could not find the "brew" executable in /usr/local/bin or anywhere on the path.'
end
Chef::Log.debug "Found Homebrew owner #{Etc.getpwuid(owner).name}; executing `brew` commands as them"
owner
end
end
end
end
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