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authorTaeer Bar-Yam <taeer.bar-yam@tweag.io>2023-01-16 10:37:04 -0500
committerTaeer Bar-Yam <taeer.bar-yam@tweag.io>2023-01-17 08:28:56 -0500
commitb2752a4f74bf2697ed9be4e9cb913de03b1b1660 (patch)
tree82c607b01098645664d15aab745879d02952e1cb /src/nix-store/nix-store.cc
parent1df3d62c769dc68c279e89f68fdd3723ed3bcb5a (diff)
add comments
Diffstat (limited to 'src/nix-store/nix-store.cc')
-rw-r--r--src/nix-store/nix-store.cc3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/nix-store/nix-store.cc b/src/nix-store/nix-store.cc
index 3bbefedbe..6b79c373f 100644
--- a/src/nix-store/nix-store.cc
+++ b/src/nix-store/nix-store.cc
@@ -72,11 +72,13 @@ static PathSet realisePath(StorePathWithOutputs path, bool build = true)
Derivation drv = store->derivationFromPath(path.path);
rootNr++;
+ /* FIXME: Encode this empty special case explicitly in the type. */
if (path.outputs.empty())
for (auto & i : drv.outputs) path.outputs.insert(i.first);
PathSet outputs;
for (auto & j : path.outputs) {
+ /* Match outputs of a store path with outputs of the derivation that produces it. */
DerivationOutputs::iterator i = drv.outputs.find(j);
if (i == drv.outputs.end())
throw Error("derivation '%s' does not have an output named '%s'",
@@ -141,6 +143,7 @@ static void opRealise(Strings opFlags, Strings opArgs)
toDerivedPaths(paths),
willBuild, willSubstitute, unknown, downloadSize, narSize);
+ /* Filter out unknown paths from `paths`. */
if (ignoreUnknown) {
std::vector<StorePathWithOutputs> paths2;
for (auto & i : paths)