From ccfa6b3eee9f5e613152a4b373f67ff05696adf8 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Mon, 15 Jun 2020 16:12:27 +0200
Subject: [PATCH] Give better error message about <...> in pure eval mode
---
src/libexpr/parser.y | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/src/libexpr/parser.y b/src/libexpr/parser.y
index a1188dec0..a639be64e 100644
--- a/src/libexpr/parser.y
+++ b/src/libexpr/parser.y
@@ -689,7 +689,10 @@ Path EvalState::findFile(SearchPath & searchPath, const string & path, const Pos
if (pathExists(res)) return canonPath(res);
}
throw ThrownError({
- .hint = hintfmt("file '%1%' was not found in the Nix search path (add it using $NIX_PATH or -I)", path),
+ .hint = hintfmt(evalSettings.pureEval
+ ? "cannot look up '<%s>' in pure evaluation mode (use '--impure' to override)"
+ : "file '%s' was not found in the Nix search path (add it using $NIX_PATH or -I)",
+ path),
.nixCode = NixCode { .errPos = pos }
});
}
--
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