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Versions: 27
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Contents
# Parse a dockit config file.
# The dockit configuration file should contain the necessary options for
# passing to the appropriate Docker api methods for image creation (build) or
# container creation (running.)
# The file is passed through ERB before YAML loading.
require 'erb'
require 'dotenv'
module Dockit
class Config
ENVFILE='.env'
##
# Instantiate and parse the file.
#
# file [String] :: dockit yaml file
# locals [Hash] :: local variables to bind in the ERB context
def initialize(file, locals={})
root = Dockit::Env.new.root
Dotenv.load(File.join(root, ENVFILE))
locals['root'] ||= root
begin
@config = YAML::load(ERB.new(File.read(file)).result(bindings(locals)))
rescue NameError => e
error(e)
rescue ArgumentError => e
error(e)
end
end
# The +Dockit.yaml+ file should have top-level entries for (at least)
# +build+ and/or +create+
# name :: Top-level key
# key :: key in +name+ hash
# ==== Returns
# - Hash for +name+ if +key+ is nil.
# - Value of +key+ in +name+ hash.
def get(name, key=nil)
phase = @config[name.to_s]
return phase unless key && phase
phase[key.to_s]
end
private
# Generate bindings object for locals to pass to erb
# locals :: hash converted to local variables
# Returns :: binding object
def bindings(locals)
b = binding
locals.each do |k,v|
b.local_variable_set(k, v)
end
return b
end
def error(e)
abort [e.message.capitalize,
"Did you forget '--locals key:value'?"].join("\n")
end
end
end
Version data entries
27 entries across 27 versions & 1 rubygems