liminix/make-image.nix
Daniel Barlow 85f7f7293d add bin/init to s6-rc module
... which suggests it could be better named; init is from
s6-linux-init not s6-rc
2022-09-26 21:11:07 +01:00

54 lines
1.5 KiB
Nix

{
stdenv
, busybox
, buildPackages
, callPackage
, pseudofile
, runCommand
, s6-init-files
, writeText
} : config :
let
pseudofiles = writeText "pseudofiles" ''
/ d 0755 0 0
/bin d 0755 0 0
/etc d 0755 0 0
/run d 0755 0 0
/dev d 0755 0 0
/dev/null c 0666 root root 1 3
/dev/zero c 0666 root root 1 5
/dev/tty1 c 0777 root root 4 1
/dev/tty2 c 0777 root root 4 2
/dev/tty3 c 0777 root root 4 3
/dev/tty4 c 0777 root root 4 4
/dev/tty c 0777 root root 5 0
/dev/console c 0600 root root 5 1
/proc d 0555 root root
/sys d 0555 root root
/dev/pts d 0755 0 0
/etc/init.d d 0755 0 0
/bin/sh s 0755 0 0 ${busybox}/bin/sh
/bin/busybox s 0755 0 0 ${busybox}/bin/busybox
'';
config-pseudofiles = pseudofile.write "config.etc"
(config.environment.contents);
storefs = callPackage <nixpkgs/nixos/lib/make-squashfs.nix> {
# add pseudofiles as packages to store so that the packages they
# depend on are also added
storeContents = [
pseudofiles
s6-init-files
config-pseudofiles
] ++ config.packages ;
};
in runCommand "frob-squashfs" {
nativeBuildInputs = with buildPackages; [ squashfsTools qprint ];
} ''
cp ${storefs} ./store.img
chmod +w store.img
mksquashfs - store.img -no-recovery -quiet -no-progress -root-becomes store -p "/ d 0755 0 0"
mksquashfs - store.img -no-recovery -quiet -no-progress -root-becomes nix -pf ${pseudofiles} -pf ${s6-init-files} -pf ${config-pseudofiles}
cp store.img $out
''