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Enforce use of immutable flakes in pure mode

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... plus a temporary hack to allow impure flakes at top-level for the
default installation source.
This commit is contained in:
Eelco Dolstra 2019-02-12 21:05:44 +01:00
parent ba05f29838
commit 272b58220d
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GPG key ID: 8170B4726D7198DE
6 changed files with 46 additions and 19 deletions
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6
src/libexpr/primops/fetchMercurial.cc
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@ -27,9 +27,6 @@ std::regex commitHashRegex("^[0-9a-fA-F]{40}$");
HgInfo exportMercurial(ref<Store> store, const std::string & uri,
std::string rev, const std::string & name)
{
if (evalSettings.pureEval && rev == "")
throw Error("in pure evaluation mode, 'fetchMercurial' requires a Mercurial revision");
if (rev == "" && hasPrefix(uri, "/") && pathExists(uri + "/.hg")) {
bool clean = runProgram("hg", true, { "status", "-R", uri, "--modified", "--added", "--removed" }) == "";
@ -203,6 +200,9 @@ static void prim_fetchMercurial(EvalState & state, const Pos & pos, Value * * ar
// whitelist. Ah well.
state.checkURI(url);
if (evalSettings.pureEval && rev == "")
throw Error("in pure evaluation mode, 'fetchMercurial' requires a Mercurial revision");
auto hgInfo = exportMercurial(state.store, url, rev, name);
state.mkAttrs(v, 8);