From c0390c277e5fcda8d7288b717ff952e01dcdcb8d Mon Sep 17 00:00:00 2001
From: Aleksandr Nogikh <nogikh@google.com>
Date: Mon, 21 Oct 2024 17:38:01 +0200
Subject: pkg/vcs: parse git diffs

Provide a functionality to extract the files affected by a git patch.
---
 pkg/vcs/git.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'pkg/vcs/git.go')

diff --git a/pkg/vcs/git.go b/pkg/vcs/git.go
index 7425066d2..b75859338 100644
--- a/pkg/vcs/git.go
+++ b/pkg/vcs/git.go
@@ -654,3 +654,14 @@ func (git *git) PushCommit(repo, commit string) error {
 	}
 	return nil
 }
+
+var fileNameRe = regexp.MustCompile(`(?m)^diff.* b\/([^\s]+)`)
+
+// ParseGitDiff extracts the files modified in the git patch.
+func ParseGitDiff(patch []byte) []string {
+	var files []string
+	for _, match := range fileNameRe.FindAllStringSubmatch(string(patch), -1) {
+		files = append(files, match[1])
+	}
+	return files
+}
-- 
cgit mrf-deployment