Diff parser and printer for Go.
go get -u github.com/sourcegraph/go-diff/diff
It doesn't actually compute a diff. It only reads in (and prints out, given a Go struct representation) unified diff output, such as the following. The corresponding data structure in Go is the diff.FileDiff struct.
--- oldname 2009-10-11 15:12:20.000000000 -0700 +++ newname 2009-10-11 15:12:30.000000000 -0700 @@ -1,3 +1,9 @@ Section Header +This is an important +notice! It should +therefore be located at +the beginning of this +document! + This part of the document has stayed the same from version to @@ -5,16 +11,10 @@ be shown if it doesn't change. Otherwise, that would not be helping to -compress the size of the -changes. - -This paragraph contains -text that is outdated. -It will be deleted in the -near future. +compress anything.