25180a5e6e
* Resolves #118 * Leverage flakes to manage package sources & hashes * Update documentation with an example. * Add `mkVersion` function to autogenerate a version string. * Add srcs package via overlay containing all sources defined in _pkgs/flake.nix_ * Extend `flk update` with the ability to only update the given input
74 lines
1.9 KiB
Markdown
74 lines
1.9 KiB
Markdown
# Packages
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Similar to [modules](../modules), the pkgs directory mirrors the upstream
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[nixpkgs/pkgs][pkgs], and for the same reason; if you ever want to upstream
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your package, it's as simple as dropping it into the nixpkgs/pkgs directory.
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The only minor difference is that, instead of adding the `callPackage` call to
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`all-packages.nix`, you just add it the the _default.nix_ in this directory,
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which is defined as a simple overlay.
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This overlay is set as the default `overlay` output attribute for the flake.
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And all the packages are exported via `packages.<system>.<pkg-name>`, for all
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the supported systems listed in the package's `meta.platforms` attribute.
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And, as usual, every package in the overlay is also available to any NixOS
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[host](../hosts).
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## Automatic Source Updates
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There is the added, but optional, convenience of declaring your sources in
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_pkgs/flake.nix_ as an input. This allows updates to be managed automatically
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by simply [updating](../doc/flk/update.md#updating-package-sources) the lock
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file. No more manually entering sha256 hashes!
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## Example
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pkgs/development/libraries/libinih/default.nix:
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```nix
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{ stdenv, meson, ninja, lib, srcs, ... }:
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let version = "r53";
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in
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stdenv.mkDerivation {
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pname = "libinih";
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inherit version;
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src = srcs.libinih;
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buildInputs = [ meson ninja ];
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mesonFlags = ''
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-Ddefault_library=shared
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-Ddistro_install=true
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'';
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meta = with lib; {
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description = "Simple .INI file parser in C";
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homepage = "https://github.com/benhoyt/inih";
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maintainers = [ maintainers.divnix ];
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license = licenses.bsd3;
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platforms = platforms.all;
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inherit version;
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};
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}
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```
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pkgs/default.nix:
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```nix
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final: prev: {
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libinih = prev.callPackage ./development/libraries/libinih { };
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}
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```
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pkgs/flake.nix:
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```nix
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{
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description = "Package sources";
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inputs = {
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libinih.url = "github:benhoyt/inih/r53";
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libinih.flake = false;
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};
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}
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```
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[pkgs]: https://github.com/NixOS/nixpkgs/tree/master/pkgs
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