From c502119fd3b9673e966d5c34ec42cbe18baa17b9 Mon Sep 17 00:00:00 2001
From: John Ericson <John.Ericson@Obsidian.Systems>
Date: Tue, 2 Jun 2020 18:05:26 +0000
Subject: [PATCH] to-base supports parsing SRI hashes, so make type flag
 optional

---
 src/nix/hash.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/nix/hash.cc b/src/nix/hash.cc
index 4980cd198..0e24bbaed 100644
--- a/src/nix/hash.cc
+++ b/src/nix/hash.cc
@@ -79,12 +79,12 @@ static RegisterCommand r2("hash-path", [](){ return make_ref<CmdHash>(FileIngest
 struct CmdToBase : Command
 {
     Base base;
-    HashType ht;
+    std::optional<HashType> ht;
     std::vector<std::string> args;
 
     CmdToBase(Base base) : base(base)
     {
-        addFlag(Flag::mkHashTypeFlag("type", &ht));
+        addFlag(Flag::mkHashTypeFlag("type", &*ht));
         expectArgs("strings", &args);
     }