buildenv: perl -> c++

[shlevy]

No description provided.

[grahamc]

Not to nit, but is this comment accurate? I don't see how $out/lib/pythonX.Y/site-packages/easy-install.pth is excluded by the below suffix list.

[shlevy]

Oops, I just copied the comment from the perl script but you're right. @edolstra any idea about this? Should that be on the list?

[edolstra]

I get:

$ ./inst/bin/nix-env -u subversion
building path(s) ‘/nix/store/xzglpy4plm5cpfx2iparghg9mj1q3cay-user-environment’
error: creating symlink from ‘/nix/store/xzglpy4plm5cpfx2iparghg9mj1q3cay-user-environment/nix-support’ to ‘/nix/store/hhs78ipwx5rz1692xns71086viy0yf6i-unrar-5.3.9/nix-support’: File exists
builder for ‘/nix/store/59p1rpz6x8b84kn1zib8v00dff2aw8lh-user-environment.drv’ failed with exit code 1
error: build of ‘/nix/store/59p1rpz6x8b84kn1zib8v00dff2aw8lh-user-environment.drv’ failed

Looks like /nix-support is not filtered correctly.

[edolstra]

BTW, it would be nice to change buildenv into a builtin derivation (see builtinFetchurl). That way, we wouldn't need any special hacks anymore for running in a chroot (the chrootDeps in corepkgs/config.nix.in).

[shlevy]

Oops, broke the filtering in a pre-push cleanup, fixing.

[shlevy]

@edolstra should be pretty straightforward to do the builtin derivation on top of this change, right? I'd rather focus my nix efforts on finishing up the perl rewrite.

[edolstra]

@shlevy Sure.

[shlevy]

@edolstra fixed