68 lines
1.9 KiB
Ruby
68 lines
1.9 KiB
Ruby
require 'fileutils'
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module Gitlab
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module Gfm
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##
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# Class that rewrites markdown links for uploads
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#
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# Using a pattern defined in `FileUploader` it copies files to a new
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# project and rewrites all links to uploads in in a given text.
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#
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#
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class UploadsRewriter
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def initialize(text, source_project, _current_user)
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@text = text
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@source_project = source_project
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@pattern = FileUploader::MARKDOWN_PATTERN
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end
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def rewrite(target_project)
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return @text unless needs_rewrite?
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@text.gsub(@pattern) do |markdown|
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file = find_file(@source_project, $~[:secret], $~[:file])
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return markdown unless file.try(:exists?)
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new_uploader = FileUploader.new(target_project)
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with_link_in_tmp_dir(file.file) do |open_tmp_file|
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new_uploader.store!(open_tmp_file)
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end
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new_uploader.markdown_link
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end
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end
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def needs_rewrite?
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files.any?
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end
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def files
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referenced_files = @text.scan(@pattern).map do
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find_file(@source_project, $~[:secret], $~[:file])
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end
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referenced_files.compact.select(&:exists?)
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end
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private
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def find_file(project, secret, file)
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uploader = FileUploader.new(project, secret: secret)
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uploader.retrieve_from_store!(file)
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uploader.file
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end
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# Because the uploaders use 'move_to_store' we must have a temporary
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# file that is allowed to be (re)moved.
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def with_link_in_tmp_dir(file)
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dir = Dir.mktmpdir('UploadsRewriter', File.dirname(file))
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# The filename matters to Carrierwave so we make sure to preserve it
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tmp_file = File.join(dir, File.basename(file))
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File.link(file, tmp_file)
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# Open the file to placate Carrierwave
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File.open(tmp_file) { |open_file| yield open_file }
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ensure
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FileUtils.rm_rf(dir)
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end
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end
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end
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end
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