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print type and value in "flake attr is not a derivation" errors

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This turns errors like:

error: flake output attribute 'hydraJobs' is not a derivation or path

into errors like:

error: expected flake output attribute 'hydraJobs' to be a derivation or
path but found a set: { binaryTarball = «thunk»; build = «thunk»; etc> }

This change affects all InstallableFlake commands.

Source: 20981461d4
Signed-off-by: Jörg Thalheim <joerg@thalheim.io>
This commit is contained in:
Qyriad 2024-05-21 05:29:52 -06:00 • committed by Valentin Gagarin
parent e2182d07d9
commit 18ac6545fc
2 changed files with 25 additions and 2 deletions
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9
src/libcmd/installable-flake.cc
View file

@ -106,9 +106,14 @@ DerivedPathsWithInfo InstallableFlake::toDerivedPaths()
fmt("while evaluating the flake output attribute '%s'", attrPath)))
{
return { *derivedPathWithInfo };
} else {
throw Error(
"expected flake output attribute '%s' to be a derivation or path but found %s: %s",
attrPath,
showType(v),
ValuePrinter(*this->state, v, errorPrintOptions)
);
}
else
throw Error("flake output attribute '%s' is not a derivation or path", attrPath);
}
auto drvPath = attr->forceDerivation();