Rationale: Since RFCs 140 and 146, the old category-based hierarchy is
deprecated and obsolete, and a new approach took place: packages should be as
self-contained as possible.
This paradigm is reflected in many new strict checks that prohibit a package to
refer to files outside its directory tree.
Following this spirit, this commit essentially moves nixpkgs
pkgs/test/default.nix to ./tests/default.nix.
Further, to keep the top-level `tests` attribute, a green alias is kept in the
place of older file.
There's no need to use a Nix file in the path here. By using a different
file we won't cause rebuilds when we change the Nix file, in particular
also when the Nix file is reformatted.
The previously used pattern was introduced in #318614, but technically
leaked the default flags into the global scope. While this would
probably not make much of a practical difference, making concatTo
support default values is a much cleaner approach.
This adds a new `imageStream` option that can be used in conjunction
with `pkgs.dockerTools.streamLayeredImage` so that the image archive
never needs to be materialized in the `/nix/store`. This greatly
improves the disk utilization for systems that use container images
built using Nix because they only need to store image layers instead of
the full image. Additionally, when deploying the new system and only
new layers need to be built/copied.
This envvar is also added to lib.proxyImpureEnvVars since it's
typically required for https proxies.
This change also updates fetchgit and go module fetching to use this
envvar. NIX_GIT_SSL_CAINFO is still supported for backwards
compatibility in fetchgit.
Since version 2.0.0, proc-macro-crate has assumed it can exec()
`env::var("CARGO")` in order to run `cargo locate-project`.
This commit adds a crate override to proc-macro-crate which simply writes the
path to buildPlatform.cargo into the proc-macro-crate sources.
This way we don't need to set `env.CARGO` for every build that depends on
proc-macro-crate -- if we do that, the $CARGO environment variable would be
visible to the entire build. This could potentially lead to incredibly
hard-to-troubleshoot heisenbugs if there is some other crate that expects
`env::var("CARGO")` to exist -- that other crate would mysteriously work only
in projects that use proc-macro-crate but not anywhere else!
Fixes two bugs:
- pass a forgotten `{}` to `compressDrv`.
- remove incorrect usage of `lndir` in `compressDrv`. I added a brief
comment on why, see [this comment][1] for more details.
Tested with:
```
$ nix build .#legacyPackages.x86_64-linux.gitea.passthru.data-compressed
$ ls -lh result/public/assets/licenses.txt*
lrwxrwxrwx 1 root root 90 Jan 1 1970 result/public/assets/licenses.txt -> /nix/store/p21irsr57hckd3x3ym18aa0cr9zmm3an-gitea-1.22.1-data/./public/assets/licenses.txt
-r--r--r-- 1 root root 30K Jan 1 1970 result/public/assets/licenses.txt.br
-r--r--r-- 1 root root 82K Jan 1 1970 result/public/assets/licenses.txt.gz
```
[1]: https://github.com/NixOS/nixpkgs/pull/332752#discussion_r1721043286
