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Add newHashAllowEmpty helper function

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This replaces the copy&paste with a helper function in hash.hh.
This commit is contained in:
Matthew Bauer 2020-06-12 10:09:42 -05:00
parent 19aa892f20
commit b260c9ee03
6 changed files with 24 additions and 38 deletions
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11
src/libexpr/primops/fetchTree.cc
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@ -102,14 +102,9 @@ static void fetch(EvalState & state, const Pos & pos, Value * * args, Value & v,
string n(attr.name);
if (n == "url")
url = state.forceStringNoCtx(*attr.value, *attr.pos);
else if (n == "sha256") {
auto hashStr = state.forceStringNoCtx(*attr.value, *attr.pos);
if (hashStr == "") {
expectedHash = Hash(htSHA256);
printError("warning: found empty hash, assuming you wanted '%s'", expectedHash->to_string());
} else
expectedHash = Hash(hashStr, htSHA256);
} else if (n == "name")
else if (n == "sha256")
expectedHash = newHashAllowEmpty(state.forceStringNoCtx(*attr.value, *attr.pos), htSHA256);
else if (n == "name")
name = state.forceStringNoCtx(*attr.value, *attr.pos);
else
throw EvalError("unsupported argument '%s' to '%s', at %s",