liminix/pkgs/liminix-tools/builders/squashfs.nix

{
  stdenv
, busybox
, buildPackages
, callPackage
, pseudofile
, runCommand
, writeText
} : filesystem :
let
  pseudofiles = pseudofile.write "files.pf" filesystem;

  storefs = callPackage <nixpkgs/nixos/lib/make-squashfs.nix> {
    # 1) Every required package is referenced from somewhere
    # outside /nix/store. 2) Every file outside the store is
    # specified by config.filesystem. 3) Therefore, closing over
    # the pseudofile will give us all the needed packages
    storeContents = [ pseudofiles ];
  };
in runCommand "frob-squashfs" {
    nativeBuildInputs = with buildPackages; [ squashfsTools qprint ];
} ''
    cp ${storefs} ./store.img
    chmod +w store.img
    mksquashfs - store.img -exit-on-error -no-recovery -quiet -no-progress  -root-becomes store -p "/ d 0755 0 0"
    mksquashfs - store.img -exit-on-error -no-recovery -quiet -no-progress  -root-becomes nix  -p "/ d 0755 0 0" -pf ${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`
squashfs builder just needs filesystem not entire config 2022-09-27 23:06:36 +02:00			`} : filesystem :`
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`
squashfs builder just needs filesystem not entire config 2022-09-27 23:06:36 +02:00			`pseudofiles = pseudofile.write "files.pf" filesystem;`
add config environment.etc which gets converted to pseudofiles 2022-09-26 21:45:00 +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			`storefs = callPackage <nixpkgs/nixos/lib/make-squashfs.nix> {`
rename systemPackages as defaultProfile.packages it doesn't work the same way as in nixos, so don't name it the same way 2022-09-27 17:17:55 +02:00			`# 1) Every required package is referenced from somewhere`
			`# outside /nix/store. 2) Every file outside the store is`
rename config.environment as config.filesystem 2022-09-27 17:33:58 +02:00			`# specified by config.filesystem. 3) Therefore, closing over`
rename systemPackages as defaultProfile.packages it doesn't work the same way as in nixos, so don't name it the same way 2022-09-27 17:17:55 +02:00			`# the pseudofile will give us all the needed packages`
			`storeContents = [ 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			`};`
			`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`
make mksquashfs fail on error 2022-09-27 18:36:25 +02:00			`mksquashfs - store.img -exit-on-error -no-recovery -quiet -no-progress -root-becomes store -p "/ d 0755 0 0"`
			`mksquashfs - store.img -exit-on-error -no-recovery -quiet -no-progress -root-becomes nix -p "/ d 0755 0 0" -pf ${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			`''`