Class: KubernetesTemplateRendering::PlaceholderExpander

Inherits:
Object
  • Object
show all
Defined in:
lib/kubernetes_template_rendering/placeholder_expander.rb

Overview

Expands a rendered placeholder-bearing output tree into a per-target sibling tree by substituting the placeholder token in both file paths and file contents. Mirrors the semantics of invocaops_docker/tools/spp-transform/spp-transform.rb.

Class Method Summary collapse

Class Method Details

.expand!(source_directory:, target_name:, placeholder_token:) ⇒ Object 



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# File 'lib/kubernetes_template_rendering/placeholder_expander.rb', line 12

def expand!(source_directory:, target_name:, placeholder_token:)
  placeholder_suffix = placeholder_token.rpartition('-').last
  target_suffix = target_name.rpartition('-').last

  source_root = Pathname.new(source_directory)
  dest_root = Pathname.new(source_directory.gsub(placeholder_token, target_name))

  Pathname.glob(source_root + "**" + "*").each do |source_path|
    next unless source_path.file?

    relative = source_path.relative_path_from(source_root).to_s
    relative_substituted = relative.gsub(placeholder_token, target_name)
    dest_path = dest_root + relative_substituted
    FileUtils.mkdir_p(dest_path.dirname)

    mtime = source_path.mtime
    contents = File.read(source_path)
    contents = contents.gsub(placeholder_token, target_name)
    contents = contents.gsub(placeholder_suffix, target_suffix)
    File.write(dest_path, contents)
    File.utime(mtime, mtime, dest_path)
  end
end