Add newHashAllowEmpty helper function

This replaces the copy&paste with a helper function in hash.hh.

1 files changed, 2 insertions, 8 deletions

diff --git a/src/libfetchers/tarball.cc b/src/libfetchers/tarball.cc
index e4dafec0b..937f86bc6 100644
--- a/src/libfetchers/tarball.cc
+++ b/src/libfetchers/tarball.cc
@@ -263,14 +263,8 @@ struct TarballInputScheme : InputScheme
                 throw Error("unsupported tarball input attribute '%s'", name);
 
         auto input = std::make_unique<TarballInput>(parseURL(getStrAttr(attrs, "url")));
-        if (auto hash = maybeGetStrAttr(attrs, "hash")) {
-            if (hash->empty()) {
-                input->hash = Hash(htUnknown);
-                printError("warning: found empty hash, assuming you wanted '%s'", input->hash->to_string());
-            } else
-                // FIXME: require SRI hash.
-                input->hash = Hash(*hash);
-        }
+        if (auto hash = maybeGetStrAttr(attrs, "hash"))
+            input->hash = newHashAllowEmpty(*hash, htUnknown);
 
         return input;
     }