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getSourceExpr(): Handle channels

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Fixes #1892.
Fixes #1865.
Fixes #3119.

(cherry picked from commit e6e61f0a54dac0174df996e93fcfedcac7769ab4)
This commit is contained in:
Eelco Dolstra 2019-10-09 15:36:51 +02:00
parent 22d4ea7a98
commit 1d5cb6ad48
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GPG key ID: 8170B4726D7198DE
1 changed files with 16 additions and 15 deletions
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31
src/nix/installables.cc
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@ -45,25 +45,26 @@ Value * SourceExprCommand::getSourceExpr(EvalState & state)
std::unordered_set<std::string> seen;
for (auto & i : searchPath) {
if (i.first == "") continue;
if (seen.count(i.first)) continue;
seen.insert(i.first);
#if 0
auto res = state.resolveSearchPathElem(i);
if (!res.first) continue;
if (!pathExists(res.second)) continue;
mkApp(*state.allocAttr(*vSourceExpr, state.symbols.create(i.first)),
state.getBuiltin("import"),
mkString(*state.allocValue(), res.second));
#endif
auto addEntry = [&](const std::string & name) {
if (name == "") return;
if (!seen.insert(name).second) return;
Value * v1 = state.allocValue();
mkPrimOpApp(*v1, state.getBuiltin("findFile"), state.getBuiltin("nixPath"));
Value * v2 = state.allocValue();
mkApp(*v2, *v1, mkString(*state.allocValue(), i.first));
mkApp(*state.allocAttr(*vSourceExpr, state.symbols.create(i.first)),
mkApp(*v2, *v1, mkString(*state.allocValue(), name));
mkApp(*state.allocAttr(*vSourceExpr, state.symbols.create(name)),
state.getBuiltin("import"), *v2);
}
};
for (auto & i : searchPath)
/* Hack to handle channels. */
if (i.first.empty() && pathExists(i.second + "/manifest.nix")) {
for (auto & j : readDirectory(i.second))
if (j.name != "manifest.nix"
&& pathExists(fmt("%s/%s/default.nix", i.second, j.name)))
addEntry(j.name);
} else
addEntry(i.first);
vSourceExpr->attrs->sort();
}