Added gist methods related to git + Truncate command output

internal/git/output_parser.go

@@ -0,0 +1,39 @@
+package git
+
+import (
+	"bytes"
+	"io"
+)
+
+func truncateCommandOutput(out io.Reader, maxBytes int64) (string, bool, error) {
+	var (
+		buf []byte
+		err error
+	)
+
+	if maxBytes < 0 {
+		// read entire output
+		buf, err = io.ReadAll(out)
+		if err != nil {
+			return "", false, err
+		}
+		return string(buf), false, nil
+	}
+
+	// read up to maxBytes bytes
+	buf = make([]byte, maxBytes)
+	n, err := io.ReadFull(out, buf)
+	if err != nil && err != io.EOF && err != io.ErrUnexpectedEOF {
+		return "", false, err
+	}
+	bytesRead := int64(n)
+
+	// find index of last newline character
+	lastNewline := bytes.LastIndexByte(buf, '\n')
+	if lastNewline >= 0 {
+		// truncate buffer to exclude last line
+		buf = buf[:lastNewline]
+	}
+
+	return string(buf), bytesRead == maxBytes, nil
+}