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flake.nix
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flake.nix
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{
description = "SearXNG";
inputs = {
nixpkgs.url = "github:NixOS/nixpkgs";
flake-utils.url = "github:numtide/flake-utils";
pypi-deps-db = {
url = "github:DavHau/pypi-deps-db";
flake = false;
};
mach-nix-src.url = "github:DavHau/mach-nix";
mach-nix-src.inputs.pypi-deps-db.follows = "pypi-deps-db";
flake-compat = {
url = "github:edolstra/flake-compat";
flake = false;
};
};
outputs = { self, nixpkgs, flake-utils, mach-nix-src, pypi-deps-db, ... }:
let
# TODO : for some reason `nix flake show` results in error:
# ```error: a 'aarch64-darwin' with features {} is required to build '/nix/store/s79ixgs3xy250x1b9vyy90g7dzd6bsh4-conda-channels.json.drv',
# but I am a 'x86_64-linux' with features {benchmark, big-parallel, kvm, nixos-test}```
# Some internal part of mach-nix attempts to build derivation into target system and cross-build fails
supportedSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
#
# Helper function to generate an attrset '{ x86_64-linux = f "x86_64-linux"; ... }'.
forAllSystems = f:
nixpkgs.lib.genAttrs supportedSystems (system: f system);
python = "python38";
# if updating python dependencies results in error
# "The given requirements might contain package versions which are not yet part of the dependency DB"
# then
# run `nix flake lock --update-input pypi-deps-db` to set lock file to most recent pypi-deps-db
pypiDataRev = pypi-deps-db.rev;
pypiDataSha256 = pypi-deps-db.narHash;
# pypiDataSha256 = "1k66qyivkv6bhhpmddj2sw0i8mcq4fzrsnp6b3rlv7g5a0n1dbdf";
requirements = builtins.readFile ./requirements.txt;
nixpkgsFor = forAllSystems (
system:
import nixpkgs {
inherit system;
overlays = [ self.overlay ];
}
);
in
{
overlay = final: prev:
let
mach-nix = import mach-nix-src {
pkgs = prev;
inherit python pypiDataRev pypiDataSha256;
};
in
{
searxng = (
mach-nix.buildPythonPackage {
inherit requirements;
pname = "SearXNG";
version = "1.0";
src = ./.;
}
);
dev-python =
mach-nix.mkPython {
inherit python;
requirements = requirements;
};
};
packages = forAllSystems (
system:
{
inherit (nixpkgsFor.${system}) searxng;
}
);
# The default package for 'nix build'. This makes sense if the
# flake provides only one package or there is a clear "main"
# package.
# Returns Searx with plugin enabled
defaultPackage = forAllSystems (system: self.packages.${system}.searxng);
# To use as `nix develop`
# will provide shell with
# - make utility for `make run` and `make test`
# - python with dependencies, to run searx built with nix
# - env var pointing to default repository searx config
devShell = forAllSystems (
system: nixpkgsFor.${system}.mkShell
rec {
buildInputs = with nixpkgsFor.${system}; [
dev-python
gnumake
];
settingsFile = builtins.readFile ./searx/settings.yml;
SEARX_SETTINGS_PATH = "${settingsFile}";
}
);
nixosModules.searxng = { pkgs, ... }:
{
nixpkgs.overlays = [ self.overlay ];
};
};
}