Sassのフックメソッド

http://sass-lang.com/docs/yardoc/Sass/Plugin/Compiler.html より。

on_compilation_error {|error, template, css| ... }

Register a callback to be run when there’s an error compiling a Sass file.

Sassファイル、SCSSファイルのコンパイルに失敗した時に実行される。

on_creating_directory {|dirname| ... }

Register a callback to be run when Sass creates a directory into which to put CSS files.

on_deleting_css {|filename| ... }

Register a callback to be run when Sass deletes a CSS file.

on_not_updating_stylesheet {|template, css| ... }

Register a callback to be run when Sass decides not to update a stylesheet.

on_template_created {|template| ... }

Register a callback to be run when Sass detects that a new template has been created.

on_template_deleted {|template| ... }

Register a callback to be run when Sass detects that a template has been deleted.

on_template_modified {|template| ... }

Register a callback to be run when Sass detects that a template has been modified.

on_updated_stylesheet {|template, css| ... }

Register a callback to be run after a single stylesheet is updated.

on_updating_stylesheet_with_deprecation_warning(&block)

(also: #on_updating_stylesheet)

on_updating_stylesheets {|individual_files| ... }

Register a callback to be run after stylesheets are mass-updated.