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liminix/default.nix

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Nix

{
device
, liminix-config ? <liminix-config>
, phram ? false
, nixpkgs ? <nixpkgs>
}:
let
overlay = import ./overlay.nix;
pkgs = import nixpkgs (device.system // {
overlays = [overlay device.overlay];
config = {allowUnsupportedSystem = true; };
});
inherit (pkgs) callPackage writeText liminix fetchFromGitHub;
inherit (pkgs.lib) concatStringsSep;
config = (import ./merge-modules.nix) [
./modules/base.nix
({ lib, ... } : { config = { inherit (device) kernel; }; })
liminix-config
./modules/s6
./modules/users.nix
(if phram then ./modules/phram.nix else (args: {}))
] pkgs;
squashfs = liminix.builders.squashfs config.filesystem.contents;
openwrt = fetchFromGitHub {
name = "openwrt-source";
repo = "openwrt";
owner = "openwrt";
rev = "a5265497a4f6da158e95d6a450cb2cb6dc085cab";
hash = "sha256-YYi4gkpLjbOK7bM2MGQjAyEBuXJ9JNXoz/JEmYf8xE8=";
};
outputs = rec {
inherit squashfs;
kernel = pkgs.kernel.override {
inherit (config.kernel) config;
};
dtb = (callPackage ./kernel/dtb.nix {}) {
dts = "${openwrt}/target/linux/ath79/dts/qca9531_glinet_gl-ar750.dts";
includes = [
"${openwrt}/target/linux/ath79/dts"
"${kernel.headers}/include"
];
};
uimage = (callPackage ./kernel/uimage.nix {}) {
commandLine = concatStringsSep " " config.boot.commandLine;
inherit (device.boot) loadAddress entryPoint;
inherit kernel;
inherit dtb;
};
combined-image = pkgs.runCommand "firmware.bin" {
nativeBuildInputs = [ pkgs.buildPackages.ubootTools ];
} ''
mkdir $out
dd if=${uimage} of=$out/firmware.bin bs=128k conv=sync
dd if=${squashfs} of=$out/firmware.bin bs=128k conv=sync,nocreat,notrunc oflag=append
'';
boot-scr =
let
inherit (pkgs.lib.trivial) toHexString;
uimageStart = 10485760; # 0xa00000
squashfsStart = uimageStart + 4 * 1024 * 1024;
squashfsSize = 8;
cmd = "mtdparts=phram0:${toString squashfsSize}M(nix) phram.phram=phram0,0x${toHexString squashfsStart},${toString squashfsSize}Mi memmap=${toString squashfsSize}M\$0x${toHexString squashfsStart} root=1f00";
in
pkgs.buildPackages.writeScript "firmware.bin" ''
setenv serverip 192.168.8.148
setenv ipaddr 192.168.8.251
setenv bootargs '${concatStringsSep " " config.boot.commandLine} ${cmd}'
tftp 0x8${toHexString uimageStart} result/uimage ; tftp 0x8${toHexString squashfsStart} result/squashfs
bootm 0x${toHexString uimageStart}
'';
directory = pkgs.runCommand "liminix" {} (''
mkdir $out
cd $out
ln -s ${squashfs} squashfs
ln -s ${kernel} vmlinux
ln -s ${manifest} manifest
ln -s ${kernel.headers} build
'' +
(if device ? boot then ''
ln -s ${uimage} uimage
${if phram then "ln -s ${boot-scr} boot.scr" else ""}
ln -s ${boot-scr} flash.scr
'' else ""));
# this exists so that you can run "nix-store -q --tree" on it and find
# out what's in the image, which is nice if it's unexpectedly huge
manifest = writeText "manifest.json" (builtins.toJSON config.filesystem.contents);
tftpd = pkgs.buildPackages.tufted;
};
in {
outputs = outputs // { default = outputs.${device.outputs.default}; };
# this is just here as a convenience, so that we can get a
# cross-compiling nix-shell for any package we're customizing
inherit pkgs;
}