Class: Lono::Param::Generator
- Inherits:
-
AbstractBase
- Object
- AbstractBase
- Lono::Param::Generator
- Defined in:
- lib/lono/param/generator.rb
Instance Attribute Summary collapse
-
#base_path ⇒ Object
readonly
set when generate is called.
-
#env_path ⇒ Object
readonly
set when generate is called.
Instance Method Summary collapse
- #config_locations ⇒ Object
-
#context ⇒ Object
Context for ERB rendering.
- #convert_to_cfn_format(contents, casing = :underscore) ⇒ Object
- #generate ⇒ Object
- #lookup_config_location(env) ⇒ Object
- #output_path ⇒ Object
- #parameters ⇒ Object
-
#params_exist? ⇒ Boolean
Checks both base and source path for existing of the param file.
- #parse_contents(contents) ⇒ Object
-
#process_erb ⇒ Object
Reads both the base source and env source and overlay the two Example 1: params/base/mystack.txt - base path params/production/mystack.txt - env path.
- #puts_param_message(type) ⇒ Object
- #render_erb(path) ⇒ Object
- #write_output(json) ⇒ Object
Methods inherited from AbstractBase
#initialize, #reinitialize, #template_path
Methods included from Blueprint::Root
#find_blueprint_root, #set_blueprint_root
Constructor Details
This class inherits a constructor from Lono::AbstractBase
Instance Attribute Details
#base_path ⇒ Object (readonly)
set when generate is called
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# File 'lib/lono/param/generator.rb', line 3 def base_path @base_path end |
#env_path ⇒ Object (readonly)
set when generate is called
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# File 'lib/lono/param/generator.rb', line 3 def env_path @env_path end |
Instance Method Details
#config_locations ⇒ Object
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# File 'lib/lono/param/generator.rb', line 36 def config_locations @base_path = lookup_config_location("base") @env_path = lookup_config_location(Lono.env) if ENV['LONO_DEBUG_PARAM'] puts "LONO_DEBUG_PARAM enabled" puts " @base_path #{@base_path.inspect}" puts " @env_path #{@env_path.inspect}" end [@base_path, @env_path] end |
#context ⇒ Object
Context for ERB rendering. This is where we control what references get passed to the ERB rendering.
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# File 'lib/lono/param/generator.rb', line 108 def context @context ||= Lono::Template::Context.new(@options) end |
#convert_to_cfn_format(contents, casing = :underscore) ⇒ Object
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# File 'lib/lono/param/generator.rb', line 123 def convert_to_cfn_format(contents, casing=:underscore) lines = parse_contents(contents) # First use a Hash structure so that overlay env files will override # the base param file. data = {} lines.each do |line| key,value = line.strip.split("=").map {|x| x.strip} data[key] = value end # Now build up the aws json format for parameters params = [] data.each do |key,value| param = if value == "use_previous_value" || value == "UsePreviousValue" { "ParameterKey": key, "UsePreviousValue": true } elsif value { "ParameterKey": key, "ParameterValue": value } end if param param = param.to_snake_keys if casing == :underscore params << param end end params end |
#generate ⇒ Object
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# File 'lib/lono/param/generator.rb', line 5 def generate puts "Generating parameter files for blueprint #{@blueprint.color(:green)}:" @base_path, @env_path = config_locations return {} unless @base_path || @env_path # useful option for lono cfn, since some templates dont require params return {} if @options[:allow_not_exists] && !params_exist? if params_exist? contents = process_erb data = convert_to_cfn_format(contents) camel_data = convert_to_cfn_format(contents, :camel) json = JSON.pretty_generate(camel_data) write_output(json) unless @options[:mute] short_output_path = output_path.sub("#{Lono.root}/","") puts " #{short_output_path}" end else puts "#{@base_path} or #{@env_path} could not be found? Are you sure it exist?" exit 1 end data end |
#lookup_config_location(env) ⇒ Object
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# File 'lib/lono/param/generator.rb', line 49 def lookup_config_location(env) location = Lono::ConfigLocation.new("params", @options, env) env == "base" ? location.lookup_base : location.lookup end |
#output_path ⇒ Object
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# File 'lib/lono/param/generator.rb', line 156 def output_path output = Lono.config.output_path.sub("#{Lono.root}/","") path = if @base_path && !@env_path # Handle case when base config exist but the env config does not @base_path.sub("configs", output).sub("base", Lono.env) else @env_path.sub("configs", output) end path.sub(/\.txt$/,'.json') end |
#parameters ⇒ Object
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# File 'lib/lono/param/generator.rb', line 32 def parameters generate end |
#params_exist? ⇒ Boolean
Checks both base and source path for existing of the param file. Example:
params/base/mystack.txt - base path
params/production/mystack.txt - source path
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# File 'lib/lono/param/generator.rb', line 67 def params_exist? @base_path && File.exist?(@base_path) || @env_path && File.exist?(@env_path) end |
#parse_contents(contents) ⇒ Object
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# File 'lib/lono/param/generator.rb', line 112 def parse_contents(contents) lines = contents.split("\n") # remove comment at the end of the line lines.map! { |l| l.sub(/#.*/,'').strip } # filter out commented lines lines = lines.reject { |l| l =~ /(^|\s)#/i } # filter out empty lines lines = lines.reject { |l| l.strip.empty? } lines end |
#process_erb ⇒ Object
Reads both the base source and env source and overlay the two Example 1:
params/base/mystack.txt - base path
params/production/mystack.txt - env path
the base/mystack.txt gets combined with the prod/mystack.txt
it produces a final prod/mystack.txt
Example 2:
params/base/mystack.txt - base path
the base/mystack.txt is used to produced a prod/mystack.txt
Example 3:
params/production/mystack.txt - env path
the prod/mystack.txt is used to produced a prod/mystack.txt
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# File 'lib/lono/param/generator.rb', line 89 def process_erb contents = [] contents << render_erb(@base_path) contents << render_erb(@env_path) result = contents.compact.join("\n") # puts "process_erb result".color(:yellow) # puts result result end |
#puts_param_message(type) ⇒ Object
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# File 'lib/lono/param/generator.rb', line 54 def (type) path = send("#{type}_path") return unless path if param_file?(path) pretty_path = path.sub("#{Lono.root}/",'') puts "Using param for #{type}: #{pretty_path}".color(:yellow) end end |
#render_erb(path) ⇒ Object
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# File 'lib/lono/param/generator.rb', line 99 def render_erb(path) return unless path if File.exist?(path) RenderMePretty.result(path, context: context) end end |
#write_output(json) ⇒ Object
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# File 'lib/lono/param/generator.rb', line 167 def write_output(json) dir = File.dirname(output_path) FileUtils.mkdir_p(dir) IO.write(output_path, json) end |