49 lines
1.3 KiB
Ruby
49 lines
1.3 KiB
Ruby
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require 'diff/lcs'
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require 'diff/lcs/hunk'
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module Compass
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module Diff
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#stole this from rspec who stole this from the gem
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def diff_as_string(data_new, data_old)
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data_old = data_old.split(/\n/).map! { |e| e.chomp }
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data_new = data_new.split(/\n/).map! { |e| e.chomp }
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output = ""
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diffs = ::Diff::LCS.diff(data_old, data_new)
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return output if diffs.empty?
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oldhunk = hunk = nil
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file_length_difference = 0
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diffs.each do |piece|
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begin
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hunk = ::Diff::LCS::Hunk.new(
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data_old, data_new, piece, context_lines, file_length_difference
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)
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file_length_difference = hunk.file_length_difference
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next unless oldhunk
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# Hunks may overlap, which is why we need to be careful when our
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# diff includes lines of context. Otherwise, we might print
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# redundant lines.
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if (context_lines > 0) and hunk.overlaps?(oldhunk)
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hunk.unshift(oldhunk)
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else
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output << oldhunk.diff(format)
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end
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ensure
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oldhunk = hunk
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output << "\n"
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end
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end
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#Handle the last remaining hunk
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output << oldhunk.diff(format) << "\n"
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end
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protected
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def format
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:unified
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end
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def context_lines
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3
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end
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end
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end
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