Class: Kdeploy::Template

Inherits:
Object
  • Object
show all
Defined in:
lib/kdeploy/template/template.rb

Overview

ERB template rendering and upload handler

Class Method Summary collapse

Class Method Details

.create_template_context(variables) ⇒ Object 



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# File 'lib/kdeploy/template/template.rb', line 17

def self.create_template_context(variables)
  # Use a simple class instead of OpenStruct for better performance
  context_class = Class.new
  variables.each do |key, value|
    context_class.define_method(key) { value }
  end
  context_class.new
end

.extract_template_identifiers(template_content) ⇒ Object 



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# File 'lib/kdeploy/template/template.rb', line 53

def self.extract_template_identifiers(template_content)
  identifiers = template_content.scan(/<%=\s*([a-zA-Z_]\w*)/).flatten
  identifiers.uniq - ruby_keywords
end

.render(template_path, variables = {}) ⇒ Object 



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# File 'lib/kdeploy/template/template.rb', line 10

def self.render(template_path, variables = {})
  template_content = File.read(template_path)
  validate_template_variables(template_content, variables)
  context = create_template_context(variables)
  ERB.new(template_content).result(context.instance_eval { binding })
end

.render_and_upload(executor, template_path, destination, variables = {}) ⇒ Object 



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

def self.render_and_upload(executor, template_path, destination, variables = {})
  rendered_content = render(template_path, variables)

  # Create temporary file
  temp_file = Tempfile.new('kdeploy')
  begin
    temp_file.write(rendered_content)
    temp_file.close

    # Upload rendered file
    executor.upload(temp_file.path, destination)
  ensure
    temp_file.unlink
  end
end

.ruby_keywords ⇒ Object 



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# File 'lib/kdeploy/template/template.rb', line 58

def self.ruby_keywords
  %w[alias and begin break case class def defined? do else elsif end ensure false for if in module next nil not
     or redo rescue retry return self super then true undef unless until when while yield]
end

.validate_template_variables(template_content, variables) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/kdeploy/template/template.rb', line 42

def self.validate_template_variables(template_content, variables)
  required = extract_template_identifiers(template_content)
  return if required.empty?

  provided = variables.keys.to_set(&:to_s)
  missing = required.reject { |name| provided.include?(name) }
  return if missing.empty?

  raise ArgumentError, "Missing template variables: #{missing.sort.join(', ')}"
end