95 lines
		
	
	
		
			3.3 KiB
		
	
	
	
		
			Ruby
		
	
	
	
			
		
		
	
	
			95 lines
		
	
	
		
			3.3 KiB
		
	
	
	
		
			Ruby
		
	
	
	
# frozen_string_literal: true
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# Module providing methods for dealing with separating a tree-ish string and a
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# file path string when combined in a request parameter
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module ExtractsPath
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  extend ::Gitlab::Utils::Override
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  include ExtractsRef
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  # If we have an ID of 'foo.atom', and the controller provides Atom and HTML
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  # formats, then we have to check if the request was for the Atom version of
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  # the ID without the '.atom' suffix, or the HTML version of the ID including
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  # the suffix. We only check this if the version including the suffix doesn't
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  # match, so it is possible to create a branch which has an unroutable Atom
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  # feed.
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  def extract_ref_without_atom(id)
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    id_without_atom = id.sub(/\.atom$/, '')
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    valid_refs = ref_names.select { |v| "#{id_without_atom}/".start_with?("#{v}/") }
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    raise InvalidPathError if valid_refs.blank?
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    valid_refs.max_by(&:length)
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  end
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  # Extends the method to handle if there is no path and the ref doesn't
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  # exist in the repo, try to resolve the ref without an '.atom' suffix.
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  # If _that_ ref is found, set the request's format to Atom manually.
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  #
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  # Automatically renders `not_found!` if a valid tree path could not be
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  # resolved (e.g., when a user inserts an invalid path or ref).
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  #
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  # Automatically redirects to the current default branch if the ref matches a
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  # previous default branch that has subsequently been deleted.
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  #
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  # rubocop:disable Gitlab/ModuleWithInstanceVariables
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  override :assign_ref_vars
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  def assign_ref_vars
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    super
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    rectify_atom!
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    rectify_renamed_default_branch! && return
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    raise InvalidPathError unless @commit
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    @hex_path = Digest::SHA1.hexdigest(@path)
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    @logs_path = logs_file_project_ref_path(@project, @ref, @path)
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  rescue RuntimeError, NoMethodError, InvalidPathError
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    render_404
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  end
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  # rubocop:enable Gitlab/ModuleWithInstanceVariables
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  private
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  # Override in controllers to determine which actions are subject to the redirect
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  def redirect_renamed_default_branch?
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    false
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  end
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  # rubocop:disable Gitlab/ModuleWithInstanceVariables
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  def rectify_atom!
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    return if @commit
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    return unless @id.ends_with?('.atom')
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    return unless @path.empty?
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    @id = @ref = extract_ref_without_atom(@id)
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    @commit = @repo.commit(@ref)
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    request.format = :atom if @commit
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  end
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  # rubocop:enable Gitlab/ModuleWithInstanceVariables
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  # For GET/HEAD requests, if the ref doesn't exist in the repository, check
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  # whether we're trying to access a renamed default branch. If we are, we can
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  # redirect to the current default branch instead of rendering a 404.
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  # rubocop:disable Gitlab/ModuleWithInstanceVariables
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  def rectify_renamed_default_branch!
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    return unless redirect_renamed_default_branch?
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    return if @commit
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    return unless @id && @ref && repository_container.respond_to?(:previous_default_branch)
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    return unless repository_container.previous_default_branch == @ref
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    return unless request.get? || request.head?
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    flash[:notice] = _('The default branch for this project has been changed. Please update your bookmarks.')
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    redirect_to url_for(id: @id.sub(/\A#{Regexp.escape(@ref)}/, repository_container.default_branch))
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    true
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  end
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  # rubocop:enable Gitlab/ModuleWithInstanceVariables
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  override :repository_container
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  def repository_container
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    @project
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  end
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end
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