GoDiffy – Git diffs, parsed the Go way.
GoDiffy is a library that parses Git diffs and converts them into a structured format that can be easily consumed by Go programs. No external dependencies, just Go standard library.
diff --git a/foo.txt b/foo.txt
index abc123..def456 100644
--- a/foo.txt
+++ b/foo.txt
@@ -1,3 +1,4 @@
line1
-line2
+new2
line3| Diff fragment | Parsed into | Go field |
|---|---|---|
diff --git a/foo.txt b/foo.txt |
start of a new file block | FileDiff.Header |
index abc123..def456 100644 |
blob IDs + file mode | FileDiff.OldHash == "abc123"FileDiff.NewHash == "def456"FileDiff.NewMode == "100644" |
--- a/foo.txt |
old filename | FileDiff.OldPath == "foo.txt" |
+++ b/foo.txt |
new filename | FileDiff.NewPath == "foo.txt" |
@@ -1,3 +1,4 @@ |
hunk header: | • old start & count: Hunk.OldStart == 1Hunk.OldLineCount == 3• new start & count: Hunk.NewStart == 1Hunk.NewLineCount == 4 |
line1 |
context (unchanged) line | HunkLine{Type: HunkLineContext, Line: "line1"} |
-line2 |
deleted line | HunkLine{Type: HunkLineDeleted, Line: "line2"} |
+new2 |
added line | HunkLine{Type: HunkLineAdded, Line: "new2"} |
line3 |
context (unchanged) line | HunkLine{Type: HunkLineContext, Line: "line3"} |
Important
- Whitespace (
-,+) is stripped off before storing in HunkLine.Content. - The order of hunks in FileDiff.Hunks matches the order of
@@ … @@blocks. - If you see multiple
@@ … @@blocks, you’ll get multiple Hunk entries under the same FileDiff.