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nix-super/doc/manual/rl-next/print-value-in-installable-flake-error.md
Qyriad 18ac6545fc print type and value in "flake attr is not a derivation" errors 
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>
2024-05-29 20:51:32 +02:00

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synopsis prs
New-cli flake commands that expect derivations now print the failing value and its type 10778

In errors like flake output attribute 'nixosConfigurations.yuki.config' is not a derivation or path, the message now includes the failing value and type.

Before:

    error: flake output attribute 'nixosConfigurations.yuki.config' is not a derivation or path

After:

    error: expected flake output attribute 'nixosConfigurations.yuki.config' to be a derivation or path but found a set: { appstream = «thunk»; assertions = «thunk»; boot = { bcache = «thunk»; binfmt = «thunk»; binfmtMiscRegistrations = «thunk»; blacklistedKernelModules = «thunk»; bootMount = «thunk»; bootspec = «thunk»; cleanTmpDir = «thunk»; consoleLogLevel = «thunk»; «43 attributes elided» }; «48 attributes elided» }