nixpkgs/pkgs/stdenv/generic
Jan Malakhovski d1d5ecb3bf stdenv: perform checks only when evaluating .drv and .out
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)"
2018-01-03 12:20:25 +00:00
..
builder.sh stdenvs: Distinguish between extraBuildInputs and extraNativeBuildInputs 2017-08-18 12:02:13 -04:00
check-meta.nix stdenv: perform checks only when evaluating .drv and .out 2018-01-03 12:20:25 +00:00
default-builder.sh * "." -> "source". 2005-12-05 14:11:09 +00:00
default.nix Get rid of most @rpath nonsense on Darwin 2017-10-08 16:13:46 -04:00
make-derivation.nix stdenv: perform checks only when evaluating .drv and .out 2018-01-03 12:20:25 +00:00
setup.sh stdenv-setup: Ease the transition with native builds 2017-12-30 22:04:23 -05:00