Class: RailsWayback::ViewSource

Inherits:
Object
  • Object
show all
Defined in:
lib/rails_wayback/view_source.rb

Overview

Materialises the view/asset directories of a given git ref into a sandbox under tmp/, so a controller can prepend that sandbox as a view path and render the historical templates.

Only the directories listed in configuration.view_paths and configuration.asset_paths are pulled from the ref. Nothing is executed, and the developer's real files are never mutated.

Constant Summary collapse

MATERIALIZATION_VERSION =

Bumped whenever the materialization format changes so stale sandboxes from earlier gem versions get rebuilt instead of being reused.

"2"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(configuration: RailsWayback.configuration, git: RailsWayback::Git.new) ⇒ ViewSource

Returns a new instance of ViewSource.



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# File 'lib/rails_wayback/view_source.rb', line 23

def initialize(configuration: RailsWayback.configuration, git: RailsWayback::Git.new)
  @configuration = configuration
  @git = git
end

Instance Attribute Details

#configuration ⇒ Object (readonly)

Returns the value of attribute configuration.



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# File 'lib/rails_wayback/view_source.rb', line 21

def configuration
  @configuration
end

#git ⇒ Object (readonly)

Returns the value of attribute git.



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# File 'lib/rails_wayback/view_source.rb', line 21

def git
  @git
end

Instance Method Details

#cleanup! ⇒ Object 



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# File 'lib/rails_wayback/view_source.rb', line 45

def cleanup!
  FileUtils.rm_rf(configuration.refs_cache_path)
end

#materialize(ref) ⇒ Object 



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# File 'lib/rails_wayback/view_source.rb', line 28

def materialize(ref)
  sha = git.resolve_ref(ref)
  target = configuration.refs_cache_path.join(sha)
  return target if fresh?(target, sha)

  FileUtils.rm_rf(target)
  FileUtils.mkdir_p(target)
  tracked_paths.each { |path| extract_path(sha, path, target) }
  write_marker(target, sha)
  target
end

#view_root_for(ref) ⇒ Object 



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# File 'lib/rails_wayback/view_source.rb', line 40

def view_root_for(ref)
  target = materialize(ref)
  configuration.view_paths.map { |p| target.join(p) }.select(&:directory?)
end