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fix: enlarge envSize by several times to not be close to nixpkgs size

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nixpkgs has 23000 attributes, and our previous limit would be hit if you
have more than one nixpkgs in the environment, for example, because
`repl-overlays` will load the new stuff from the environment on top of
the existing environment.

This is not really testable since if we did write such a test, it would
just be testing this constant tbh...

Fixes: lix-project/lix#337
Change-Id: I49197bfb4db55b082f914f0d70e84f5f5f110954
This commit is contained in:
jade 2024-05-22 16:58:35 -07:00
parent 06c1375e52
commit d05e0b9f1f
1 changed files with 7 additions and 1 deletions
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8
src/libcmd/repl.cc
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@ -90,7 +90,8 @@ struct NixRepl
Strings loadedFiles;
std::function<AnnotatedValues()> getValues;
const static int envSize = 32768;
// Uses 8MiB of memory. It's fine.
const static int envSize = 1 << 20;
std::shared_ptr<StaticEnv> staticEnv;
Env * env;
int displ;
@ -854,6 +855,11 @@ void NixRepl::loadReplOverlays()
replInitFilesFunction->determinePos(noPos)
);
// n.b. this does in fact load the stuff into the environment twice (once
// from the superset of the environment returned by repl-overlays and once
// from the thing itself), but it's not fixable because clearEnv here could
// lead to dangling references to the old environment in thunks.
// https://git.lix.systems/lix-project/lix/issues/337#issuecomment-3745
addAttrsToScope(newAttrs);
}