control-repo/scripts/config_version.rb

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Ruby
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#!/opt/puppetlabs/puppet/bin/ruby
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begin
require 'rugged'
require 'socket'
rescue LoadError
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t = Time.new
puts t.to_i
else
environmentpath = ARGV[0]
environment = ARGV[1]
# Get the hostname of the Puppet master compiling the catalog.
# Sometimes the hostname is the fqdn, so we'll take the first segment.
compiling_master = Socket.gethostname.split('.').first
# Get the path to the environment being compiled.
repo = Rugged::Repository.discover(File.join(environmentpath, environment))
head = repo.head
# First 12 characters of the sha1 hash of the newest commit.
commit_id = head.target_id[0...11]
# Show the compiling master, environment name, and commit ID.
puts "#{compiling_master}-#{environment}-#{commit_id}"
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end