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require 'tempfile'
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module Foreman
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module Renderer
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ALLOWED_HELPERS = [ :foreman_url, :grub_pass, :snippet, :snippets,
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:snippet_if_exists, :ks_console, :root_pass,
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:multiboot, :jumpstart_path, :install_path, :miniroot,
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:media_path, :param_true?, :param_false? ]
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ALLOWED_VARIABLES = [ :arch, :host, :osver, :mediapath, :static,
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:repos, :dynamic, :kernel, :initrd,
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:preseed_server, :preseed_path ]
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def render_safe template, allowed_methods = [], allowed_vars = {}
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if Setting[:safemode_render]
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box = Safemode::Box.new self, allowed_methods
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box.eval(ERB.new(template, nil, '-').src, allowed_vars)
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else
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allowed_vars.each { |k,v| instance_variable_set "@#{k}", v }
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ERB.new(template, nil, '-').result(binding)
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end
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end
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#returns the URL for Foreman Built status (when a host has finished the OS installation)
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def foreman_url(action = "built")
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# Get basic stuff
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config = URI.parse(Setting[:unattended_url])
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protocol = config.scheme || 'http'
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host = config.host || request.host
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port = config.port || request.port
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url_for :only_path => false, :controller => "/unattended", :action => action,
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:protocol => protocol, :host => host, :port => port,
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:token => (@host.token.value unless @host.token.nil?)
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end
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# provide embedded snippets support as simple erb templates
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def snippets(file)
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if ConfigTemplate.where(:name => file, :snippet => true).empty?
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render :partial => "unattended/snippets/#{file}"
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else
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return snippet(file.gsub(/^_/, ""))
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end
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end
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def snippet name, options = {}
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if (template = ConfigTemplate.where(:name => name, :snippet => true).first)
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logger.debug "rendering snippet #{template.name}"
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begin
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return unattended_render(template.template)
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rescue Exception => exc
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raise "The snippet '#{name}' threw an error: #{exc}"
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end
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else
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if options[:silent]
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nil
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else
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raise "The specified snippet '#{name}' does not exist, or is not a snippet."
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end
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end
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end
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def snippet_if_exists name
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snippet name, :silent => true
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end
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def unattended_render template
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allowed_variables = ALLOWED_VARIABLES.reduce({}) do |mapping, var|
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mapping.update(var => instance_variable_get("@#{var}"))
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end
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render_safe template, ALLOWED_HELPERS, allowed_variables
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end
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alias_method :pxe_render, :unattended_render
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def unattended_render_to_temp_file content, prefix = id.to_s, options = {}
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file = ""
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Tempfile.open(prefix, Rails.root.join('tmp') ) do |f|
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f.print(unattended_render(content))
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f.flush
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f.chmod options[:mode] if options[:mode]
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file = f
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end
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file
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end
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end
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end
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