Comments (5)
andreabedini
commented on August 15, 2024
1
@nomeata Thanks for the updates. I haven't had the chance of looking into this but I just want to say it didn't go unnoticed.
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andreabedini
commented on August 15, 2024
1
Ok, I spent some times on this and I haven't got the bottom of it unfortunately. There must be something wrong with which pkgs is being used for the evaluating plan.
If I reproduced this correctly:
❯ nix-build -A windows-exe --arg checkMaterialization true
...
> Calculated hash for haskell-project-plan-to-nix-pkgs was not 0674c017qxng0xil4yi4wsf2kr7yb9dyzpzxq7jd50dflzvm3qzz. New hash is :
> plan-sha256 = "0jmcpd8l6smj0zqkx4cx6ma2v3cvxmwws0s92ssrc6ginpis3gkb";
For full logs, run 'nix log /nix/store/swa7qajzskxhad4pvbng24aamkls5v9b-haskell-project-plan-to-nix-pkgs.drv'.
❯ nix log /nix/store/swa7qajzskxhad4pvbng24aamkls5v9b-haskell-project-plan-to-nix-pkgs.drv
Changes to haskell-project-plan-to-nix-pkgs not reflected in plan-sha256
diff -ru /nix/store/giba13w486j458p7l3jwg0rqc2zvw4fd-haskell-project-plan-to-nix-pkgs/default.nix /nix/store/6c8mdm4a5a151nxn8yjm04mc1a2hq7zz-haskell-project-plan-to-nix-pkgs/default.nix
...
Calculated hash for haskell-project-plan-to-nix-pkgs was not 0674c017qxng0xil4yi4wsf2kr7yb9dyzpzxq7jd50dflzvm3qzz. New hash is :
plan-sha256 = "0jmcpd8l6smj0zqkx4cx6ma2v3cvxmwws0s92ssrc6ginpis3gkb";
The script calculateMaterializedSha computes the hash of calculateNoHash, but if I call it
❯ nix-build -A windows-exe.project.plan-nix.passthru.calculateMaterializedSha
/nix/store/9wazjkh39l2bi8pwgrx6d9sq5j24v9fk-calculateSha
❯ /nix/store/9wazjkh39l2bi8pwgrx6d9sq5j24v9fk-calculateSha
0674c017qxng0xil4yi4wsf2kr7yb9dyzpzxq7jd50dflzvm3qzz
which is the hash we have passed! Let's see how the check is done:
❯ nix derivation show /nix/store/swa7qajzskxhad4pvbng24aamkls5v9b-haskell-project-plan-to-nix-pkgs.drv^* | jq -r '.[].env.buildCommand'
ERR=$(mktemp -d)/errors.txt
NEW_HASH=$(/nix/store/g3bd66c23mzspxdqik6hr4ppgal3k08x-calculateSha)
if [[ 0674c017qxng0xil4yi4wsf2kr7yb9dyzpzxq7jd50dflzvm3qzz != $NEW_HASH ]]; then
echo Changes to haskell-project-plan-to-nix-pkgs not reflected in plan-sha256
diff -ru /nix/store/giba13w486j458p7l3jwg0rqc2zvw4fd-haskell-project-plan-to-nix-pkgs /nix/store/6c8mdm4a5a151nxn8yjm04mc1a2hq7zz-haskell-project-plan-to-nix-pkgs || true
echo "Calculated hash for haskell-project-plan-to-nix-pkgs was not 0674c017qxng0xil4yi4wsf2kr7yb9dyzpzxq7jd50dflzvm3qzz. New hash is :" >> $ERR
echo " plan-sha256 = \"$NEW_HASH\";" >> $ERR
else
echo plan-sha256 used for haskell-project-plan-to-nix-pkgs is correct
fi
if [[ -e $ERR ]]; then
cat $ERR
false
else
cp -Lr /nix/store/giba13w486j458p7l3jwg0rqc2zvw4fd-haskell-project-plan-to-nix-pkgs $out
# Make sure output files can be removed from the sandbox
chmod -R +w $out
fi
where NEW_HASH is
❯ /nix/store/g3bd66c23mzspxdqik6hr4ppgal3k08x-calculateSha
0jmcpd8l6smj0zqkx4cx6ma2v3cvxmwws0s92ssrc6ginpis3gkb
which is the other hash.
Surely we should not say Calculated hash for haskell-project-plan-to-nix-pkgs was not 0674c017qxng0xil4yi4wsf2kr7yb9dyzpzxq7jd50dflzvm3qzz if project.plan-nix.passthru.calculateMaterializedSha returns that exact hash.
One thing I don't understand is that looking at
diff -ru /nix/store/giba13w486j458p7l3jwg0rqc2zvw4fd-haskell-project-plan-to-nix-pkgs /nix/store/6c8mdm4a5a151nxn8yjm04mc1a2hq7zz-haskell-project-plan-to-nix-pkgs
one can identify
haskell.nix/lib/materialize.nix
Line 78 in 1ad94ae
calculateUseHash->/nix/store/giba13w486j458p7l3jwg0rqc2zvw4fd-haskell-project-plan-to-nix-pkgscalculateNoHash->/nix/store/6c8mdm4a5a151nxn8yjm04mc1a2hq7zz-haskell-project-plan-to-nix-pkgs
Whose definition is
haskell.nix/lib/materialize.nix
Lines 131 to 139 in 1ad94ae
One would expect calculateUseHash to be a wrapper around calculateNoHash but
❯ nix derivation show /nix/store/giba13w486j458p7l3jwg0rqc2zvw4fd-haskell-project-plan-to-nix-pkgs | jq -r '.[].env.buildCommand'
cp -Lr /nix/store/20s0023rxwcik9qj5yww8avz156i821h-haskell-project-plan-to-nix-pkgs $out
# Make sure output files can be removed from the sandbox
chmod -R +w $out
which is "the other" plan.
Maybe @hamishmack has better insight.
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nomeata
commented on August 15, 2024
Adding --show-trace shows that somehow c2hs is involved:
… while evaluating the attribute 'buildPackages.c2hs.components.exes.c2hs'
So here is a theory: It tries to build c2hs as a build tool in the non-cross way, and in order to do so it checks the build plan of that tool?
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nomeata
commented on August 15, 2024
I found this work-around; not sure how idiomatic that is:
diff --git a/default.nix b/default.nix
index 6f06728..487dfc3 100644
--- a/default.nix
+++ b/default.nix
@@ -53,6 +53,9 @@ let
modules = [{
# smaller files
packages.tttool.dontStrip = false;
+ packages.proteaaudio.components.library.build-tools = pkgs.lib.mkForce [
+ pkgs.buildPackages.haskellPackages.c2hs
+ ];
}] ++
pkgs.lib.optional pkgs.hostPlatform.isMusl {
packages.tttool.configureFlags = [ "--ghc-option=-static" ];
~
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stale
commented on August 15, 2024
This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.
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