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# frozen_string_literal: true
module Gitlab
module Diff
module CustomDiff
class << self
def preprocess_before_diff(path, old_blob, new_blob)
return unless path.ends_with? '.ipynb'
transformed_diff(old_blob&.data, new_blob&.data)&.tap do
transformed_for_diff(new_blob, old_blob)
Gitlab::AppLogger.info({ message: 'IPYNB_DIFF_GENERATED' })
end
rescue IpynbDiff::InvalidNotebookError => e
Gitlab::ErrorTracking.log_exception(e)
nil
end
def transformed_diff(before, after)
transformed_diff = IpynbDiff.diff(before, after,
diff_opts: { context: 5, include_diff_info: true },
transform_options: { cell_decorator: :percent },
raise_if_invalid_notebook: true)
strip_diff_frontmatter(transformed_diff)
end
def transformed_blob_language(blob)
'md' if transformed_for_diff?(blob)
end
def transformed_blob_data(blob)
if transformed_for_diff?(blob)
IpynbDiff.transform(blob.data,
raise_errors: true,
options: { include_metadata: false, cell_decorator: :percent })
end
end
def strip_diff_frontmatter(diff_content)
diff_content.scan(/.*\n/)[2..]&.join('') if diff_content.present?
end
def blobs_with_transformed_diffs
@blobs_with_transformed_diffs ||= {}
end
def transformed_for_diff?(blob)
blobs_with_transformed_diffs[blob]
end
def transformed_for_diff(*blobs)
blobs.each do |b|
blobs_with_transformed_diffs[b] = true if b
end
end
end
end
end
end
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