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@zuazo
Last active November 17, 2016 08:58
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This Chef Cookbook metadata.rb example reads the dependencies from Berksfile.lock. (Experimental)
# metadata.rb
# This metadata.rb example reads the dependencies from Berksfile.lock. This can
# be used to implement the Environment Pattern with Chef Server.
#
# The Environment Cookbook:
# http://blog.vialstudios.com/the-environment-cookbook-pattern/
name 'my_face'
# [...]
description 'Installs My Face'
long_description IO.read(File.join(File.dirname(__FILE__), 'README.md'))
# This version must be in sync with Berksfile.lock:
# Use `$ berks update my_face` in each version bump.
version '0.1.0'
def knife_upload?
self.class.name == 'Chef::Cookbook::Metadata'
end
def berkshelf_load
require 'berkshelf'
rescue LoadError
raise 'You need to install Berkshelf. You can use `$ gem install berkshelf`.'
end
def berks_upload?
# TODO: Find a more elegant solution
$LOADED_FEATURES
.select { |f| f.include? '/gems/' }
.reduce(false) do |memo, f|
memo || !f.match(/berkshelf\/uploader\.rb$/).nil?
end
end
def berksfile_lock
::File.join(::File.dirname(__FILE__), Berkshelf::Lockfile::DEFAULT_FILENAME)
.tap do |file|
next if ::File.exist?(file)
fail 'Berkshelf lock file not found. You need to run `$ berks install`.'
end
end
# Dependcies read from Berkshelf in berks install/update
if !knife_upload? && !berks_upload?
depends 'vialstudios-base', '~> 0.1.0'
depends 'nginx', '~> 2.7'
depends 'postgres', '~> 2.11'
depends 'rbenv', '~> 1.7'
# Outside Berkshelf, when uploading to Chef Server using knife or berks upload
else
# Read dependencies from Berksfile.lock
berkshelf_load
lockfile = Berkshelf::Lockfile.from_file(berksfile_lock)
lockfile.parse
lockfile.locks.each do |name, lock|
next if name.match(/_test$/) # Skip "_test" cookbooks used by test-kitchen
depends name, "= #{lock.locked_version}"
end
end
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