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stdenv: perform checks only when evaluating .drv and .out

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This pushes check-meta evaluation to derivation evaluation step, leaving all other
attributes accessible.

Before this commit:

> $ HOME=/homeless-shelter NIX_PATH=nixpkgs=$(pwd) nix-instantiate --eval --strict ./default.nix -A xen --argstr system aarch64-linux
> Package ‘xen-4.5.5’ in pkgs/applications/virtualization/xen/generic.nix:226 is not supported on ‘aarch64-linux’, refusing to evaluate.

as expected

> $ HOME=/homeless-shelter NIX_PATH=nixpkgs=$(pwd) nix-instantiate --eval --strict ./default.nix -A xen.name --argstr system aarch64-linux
> Package ‘xen-4.5.5’ in pkgs/applications/virtualization/xen/generic.nix:226 is not supported on ‘aarch64-linux’, refusing to evaluate.

> $ HOME=/homeless-shelter NIX_PATH=nixpkgs=$(pwd) nix-instantiate --eval --strict ./default.nix -A xen.meta.description --argstr system aarch64-linux
> Package ‘xen-4.5.5’ in pkgs/applications/virtualization/xen/generic.nix:226 is not supported on ‘aarch64-linux’, refusing to evaluate.

which is unfortunate since its impossible to use packages in autogenerated
documentation on all platforms.

After this commit:

> $ HOME=/homeless-shelter NIX_PATH=nixpkgs=$(pwd) nix-instantiate --eval --strict ./default.nix -A xen --argstr system aarch64-linux

still fails

> $ HOME=/homeless-shelter NIX_PATH=nixpkgs=$(pwd) nix-instantiate --eval --strict ./default.nix -A xen.name --argstr system aarch64-linux
> "xen-4.5.5"

> $ HOME=/homeless-shelter NIX_PATH=nixpkgs=$(pwd) nix-instantiate --eval --strict ./default.nix -A xen.meta.description --argstr system aarch64-linux
> "Xen hypervisor and related components (vanilla)"
This commit is contained in:
Jan Malakhovski
2018-01-03 12:20:25 +00:00
parent b1ca8517ee
commit d1d5ecb3bf
2 changed files with 29 additions and 29 deletions
Download Patch File Download Diff File Expand all files Collapse all files
pkgs/stdenv/generic/check-meta.nix
+9 -12
View File
@@ -1,6 +1,5 @@
# Extend a derivation with checks for brokenness, license, etc. Throw a
# descriptive error when the check fails; return `derivationArg` otherwise.
# Note: no dependencies are checked in this step.
# Checks derivation meta and attrs for problems (like brokenness,
# licenses, etc).
{ lib, config, system, meta, derivationArg, mkDerivationArg }:
@@ -196,13 +195,11 @@ let
{ valid = false; reason = "unknown-meta"; errormsg = "has an invalid meta attrset:${lib.concatMapStrings (x: "\n\t - " + x) res}"; }
else { valid = true; };
# Throw an error if trying to evaluate an non-valid derivation
validityCondition =
let v = checkValidity attrs;
in if !v.valid
then handleEvalIssue (removeAttrs v ["valid"])
else true;
validity = checkValidity attrs;
in
assert validityCondition;
derivationArg
in validity // {
# Throw an error if trying to evaluate an non-valid derivation
handled = if !validity.valid
then handleEvalIssue (removeAttrs validity ["valid"])
else true;
}