liminix/make-image.nix

{
  stdenv
, busybox
, buildPackages
, callPackage
, pseudofile
, runCommand
, writeText
} : config :
let
  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 = [
      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  -p "/ d 0755 0 0" -pf ${config-pseudofiles}
    cp store.img $out
''
callPackageify make-image.nix 2022-09-26 17:19:14 +02:00			`{`
			`stdenv`
			`, busybox`
			`, buildPackages`
			`, callPackage`
add config environment.etc which gets converted to pseudofiles 2022-09-26 21:45:00 +02:00			`, pseudofile`
callPackageify make-image.nix 2022-09-26 17:19:14 +02:00			`, runCommand`
			`, writeText`
			`} : config :`
generate a mips squashfs with some s6-rc services haven't even tried booting it but I don't expect it to work. Needs - s6-linux-init or some other pid 1 program - a kernel 2022-09-20 00:51:38 +02:00			`let`
add config environment.etc which gets converted to pseudofiles 2022-09-26 21:45:00 +02:00			`config-pseudofiles = pseudofile.write "config.etc"`
			`(config.environment.contents);`

switch to s6-linux-init and s6-rc This is at the point where it runs a getty and a pile of s6-supervise processes, though it doesn't seem to run the things being supervised 2022-09-22 00:01:21 +02:00			`storefs = callPackage <nixpkgs/nixos/lib/make-squashfs.nix> {`
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 22:11:07 +02:00			`# add pseudofiles as packages to store so that the packages they`
make s6-rc-database a package 2022-09-26 16:59:21 +02:00			`# depend on are also added`
add config environment.etc which gets converted to pseudofiles 2022-09-26 21:45:00 +02:00			`storeContents = [`
			`config-pseudofiles`
			`] ++ config.packages ;`
switch to s6-linux-init and s6-rc This is at the point where it runs a getty and a pile of s6-supervise processes, though it doesn't seem to run the things being supervised 2022-09-22 00:01:21 +02:00			`};`
			`in runCommand "frob-squashfs" {`
callPackageify make-image.nix 2022-09-26 17:19:14 +02:00			`nativeBuildInputs = with buildPackages; [ squashfsTools qprint ];`
move all remaining pseudofiles to base module 2022-09-27 15:06:07 +02:00			`} ''`
switch to s6-linux-init and s6-rc This is at the point where it runs a getty and a pile of s6-supervise processes, though it doesn't seem to run the things being supervised 2022-09-22 00:01:21 +02:00			`cp ${storefs} ./store.img`
			`chmod +w store.img`
			`mksquashfs - store.img -no-recovery -quiet -no-progress -root-becomes store -p "/ d 0755 0 0"`
move all remaining pseudofiles to base module 2022-09-27 15:06:07 +02:00			`mksquashfs - store.img -no-recovery -quiet -no-progress -root-becomes nix -p "/ d 0755 0 0" -pf ${config-pseudofiles}`
switch to s6-linux-init and s6-rc This is at the point where it runs a getty and a pile of s6-supervise processes, though it doesn't seem to run the things being supervised 2022-09-22 00:01:21 +02:00			`cp store.img $out`
move all remaining pseudofiles to base module 2022-09-27 15:06:07 +02:00			`''`