From 2a2b1ac083e55c351ebc846fae6231de87d08541 Mon Sep 17 00:00:00 2001 From: Will Dietz Date: Thu, 22 Mar 2018 09:56:54 -0500 Subject: [PATCH] download: improve error for hash mismatch ("store mismatch") Fixes #1905 (cherry picked from commit 74da813912895015cf0f26da7aa520b278cb8071) --- src/libstore/download.cc | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/src/libstore/download.cc b/src/libstore/download.cc index c443887fd..8d0cf840a 100644 --- a/src/libstore/download.cc +++ b/src/libstore/download.cc @@ -725,8 +725,13 @@ Path Downloader::downloadCached(ref store, const string & url_, bool unpa storePath = unpackedStorePath; } - if (expectedStorePath != "" && storePath != expectedStorePath) - throw nix::Error("store path mismatch in file downloaded from '%s'", url); + if (expectedStorePath != "" && storePath != expectedStorePath) { + Hash gotHash = unpack + ? hashPath(expectedHash.type, store->toRealPath(storePath)).first + : hashFile(expectedHash.type, store->toRealPath(storePath)); + throw nix::Error("hash mismatch in file downloaded from '%s': expected hash '%s', got '%s'", + url, expectedHash.to_string(), gotHash.to_string()); + } return store->toRealPath(storePath); }