Top Level Namespace

Defined Under Namespace

Modules: Capup, SSHKit

Instance Method Summary collapse

Instance Method Details

#smart_template(from, to = nil) ⇒ Object

will first try and copy the file: config/deploy/#full_app_name/#from.erb to: shared/config/to if the original source path doesn exist then it will search in: config/deploy/shared/#from.erb this allows files which are common to all enviros to come from a single source while allowing specific ones to be over-ridden if the target file name is the same as the source then the second parameter can be left out


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# File 'lib/capup/template.rb', line 13

def smart_template(from, to=nil)
  to ||= from
  full_to_path = "#{shared_path}/config/#{to.sub(/\.sample$/, '')}"
  if from_erb_path = template_file(from)
    from_erb = StringIO.new(ERB.new(File.read(from_erb_path)).result(binding))
    upload! from_erb, full_to_path
    info "copying: #{from_erb_path} to: #{full_to_path}"
  else
    error "error #{from} not found"
  end
end

#sub_strings(input_string) ⇒ Object

we often want to refer to variables which are defined in subsequent stage files. This let's us use the {var} to represent fetch(:var) in strings which are only evaluated at runtime.


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# File 'lib/capup/sub_strings.rb', line 6

def sub_strings(input_string)
  output_string = input_string
  input_string.scan(/{{(\w*)}}/).each do |var|
    output_string.gsub!("{{#{var[0]}}}", fetch(var[0].to_sym))
  end
  output_string
end

#template_file(name) ⇒ Object

find a template file in order.


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# File 'lib/capup/template.rb', line 26

def template_file(name)
  app_root = Dir.pwd #may use Rake.application.original_dir
  unless File.exist?(File.join(app_root, 'Capfile'))
    raise "Assume run in app root(there exists a Capfile), but now in #{app_root}!" 
  end
  items = []
  items << "#{app_root}/config/#{name}"
  items << "#{app_root}/config/deploy/#{fetch(:stage)}/#{name}.erb"
  items << "#{app_root}/config/deploy/shared/#{name}.erb"
  tmpl_path = File.join(File.dirname(__FILE__), "templates")
  items << "#{tmpl_path}/#{name}.erb"
  items.each do |f|
    return f if File.exist?(f)
  end
  nil
end