docs: document that digest can be empty in some cases [
@@ -27,7 +27,8 @@ message Input {
string path = 1;
// A hash-value of the contents. The format of the contents is unspecified and
- // the digest should be treated as an opaque token.
+ // the digest should be treated as an opaque token. This can be empty in some
+ // cases.
bytes digest = 2;
}
