This patch add a new argument to Nixpkgs default expression named "overlays".
By default, the value of the argument is either taken from the environment variable `NIXPKGS_OVERLAYS`,
or from the directory `~/.nixpkgs/overlays/`. If the environment variable does not name a valid directory
then this mechanism would fallback on the home directory. If the home directory does not exists it will
fallback on an empty list of overlays.
The overlays directory should contain the list of extra Nixpkgs stages which would be used to extend the
content of Nixpkgs, with additional set of packages. The overlays, i-e directory, files, symbolic links
are used in alphabetical order.
The simplest overlay which extends Nixpkgs with nothing looks like:
```nix
self: super: {
}
```
More refined overlays can use `super` as the basis for building new packages, and `self` as a way to query
the final result of the fix-point.
An example of overlay which extends Nixpkgs with a small set of packages can be found at:
https://github.com/nbp/nixpkgs-mozilla/blob/nixpkgs-overlay/moz-overlay.nix
To use this file, checkout the repository and add a symbolic link to
the `moz-overlay.nix` file in `~/.nixpkgs/overlays` directory.
* gtk2-x11: Add gtk2 configuration with X11 backend
After making quartz the default for darwin, some builds started to fail since
they only support gtk with the X11 backend.
* apvlv: Use gtk2-x11 on darwin
* gpicview: Use gtk2-x11 for darwin
* lxappearance: Use gtk2-x11 for darwin
* fontforge-gtk: Use gtk2-x11 for darwin
* gbdfed: Use gtk2-x11 for darwin
`gcc-unwrapped` basically replaces `gccPlain`. It may seem like an ugly
polution to stick it in all-packages, but a future PR will enshrine this
`*-unwrapped` pattern. In any event, the long term goal is stdenvs might
need to tweak how compilers are booted and wrapped, but the code to build
the unwrapped compilers themselves should be generic.
Introduce new abstraction, `stdenv/booter.nix` for composing bootstraping
stages, and use it everywhere for consistency. See that file for more doc.
Stdenvs besides Linux and Darwin are completely refactored to utilize this.
Those two, due to their size and complexity, are minimally edited for
easier reviewing.
No hashes should be changed.
ckb is a driver for Corsair keyboards/mice. It also contains a graphical tool for configuring their LED backlight settings.
The driver is implemented as a userland daemon. A NixOS module is included that runs this as a systemd service.
This PR makes a few changes to how things are done:
a) build and install "koch" - the nim make-type tool
b) use "koch" to bootstrap nim
c) build additional supporting tools such as nimble, nimgrep and nimsuggest
d) nim can use other c compilers than gcc, so instead of forcing gcc we use the one from stdenv
e) run the full test suite
We do not need the "nimble" package any longer as it is part of nim.
