89 lines
2.9 KiB
Ruby
89 lines
2.9 KiB
Ruby
# frozen_string_literal: true
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module Lfs
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# Usage: Calling `new_file` check to see if a file should be in LFS and
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# return a transformed result with `content` and `encoding` to commit.
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#
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# The `repository` passed to the initializer can be a Repository or
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# class that inherits from Repository.
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#
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# The `repository_type` property will be one of the types named in
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# `Gitlab::GlRepository.types`, and is recorded on the `LfsObjectsProject`
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# in order to identify the repository location of the blob.
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#
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# For LFS an LfsObject linked to the project is stored and an LFS
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# pointer returned. If the file isn't in LFS the untransformed content
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# is returned to save in the commit.
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#
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# transformer = Lfs::FileTransformer.new(project, repository, @branch_name)
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# content_or_lfs_pointer = transformer.new_file(file_path, content).content
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# create_transformed_commit(content_or_lfs_pointer)
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#
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class FileTransformer
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attr_reader :project, :repository, :repository_type, :branch_name
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def initialize(project, repository, branch_name)
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@project = project
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@repository = repository
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@repository_type = repository.repo_type.name
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@branch_name = branch_name
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end
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def new_file(file_path, file_content, encoding: nil)
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if project.lfs_enabled? && lfs_file?(file_path)
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file_content = parse_file_content(file_content, encoding: encoding)
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lfs_pointer_file = Gitlab::Git::LfsPointerFile.new(file_content)
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lfs_object = create_lfs_object!(lfs_pointer_file, file_content)
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link_lfs_object!(lfs_object)
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Result.new(content: lfs_pointer_file.pointer, encoding: 'text')
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else
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Result.new(content: file_content, encoding: encoding)
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end
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end
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class Result
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attr_reader :content, :encoding
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def initialize(content:, encoding:)
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@content = content
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@encoding = encoding
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end
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end
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private
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def lfs_file?(file_path)
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cached_attributes.attributes(file_path)['filter'] == 'lfs'
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end
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def cached_attributes
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@cached_attributes ||= repository.attributes_at(branch_name)
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end
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# rubocop: disable CodeReuse/ActiveRecord
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def create_lfs_object!(lfs_pointer_file, file_content)
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LfsObject.find_or_create_by(oid: lfs_pointer_file.sha256, size: lfs_pointer_file.size) do |lfs_object|
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lfs_object.file = CarrierWaveStringFile.new(file_content)
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end
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end
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# rubocop: enable CodeReuse/ActiveRecord
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def link_lfs_object!(lfs_object)
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LfsObjectsProject.safe_find_or_create_by!(
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project: project,
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lfs_object: lfs_object,
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repository_type: repository_type
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)
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end
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def parse_file_content(file_content, encoding: nil)
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return file_content.read if file_content.respond_to?(:read)
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return Base64.decode64(file_content) if encoding == 'base64'
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file_content
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end
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end
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end
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