Add rootfs target, make initramfs output to $out for convenience rather than $out/initramfs.cpio.gz, start working on iso target

1 files changed, 16 insertions, 4 deletions

diff --git a/nix/rootfs.nix b/nix/rootfs.nix
index 4a771be..fc5d321 100644
--- a/nix/rootfs.nix
+++ b/nix/rootfs.nix
@@ -1,13 +1,25 @@
-{ stdenv, fetchgit, busybox }:
+{ stdenv, fetchgit, busybox, squashfsTools }:
 
 stdenv.mkDerivation {
 	name = "rootfs-yerba";
 	src = ./.;
+	buildInputs = [ squashfsTools ];
+	nativeBuildInputs = [ squashfsTools ];
 	buildPhase = ''
-		echo "todo actually build rootfs"
-		mkdir -p $out
+		mkdir -p rootfs 
+		mkdir -p rootfs/{bin,sbin,etc,proc,sys,dev,home,var,usr,root,mnt,tmp}
+		cp -a ${busybox}/_install/. rootfs/
+		# this says permission denied, cant be bothered to debug, let's just hope we can chroot to /sbin/init in the initramfs and it works?
+		# ln -sf sbin/init rootfs/init
+		echo "proc /proc proc defaults 0 0" > rootfs/etc/fstab
+		echo "sysfs /sys sysfs defaults 0 0" >> rootfs/etc/fstab
+		echo "devtmpfs /dev devtmpfs defaults 0 0" >> rootfs/etc/fstab
+		echo "::sysinit:/bin/mount -a" > rootfs/etc/inittab
+		echo "::askfirst:/bin/sh" >> rootfs/etc/inittab 
+		echo "::ctrlaltdel:/sbin/reboot" >> rootfs/etc/inittab
+		mksquashfs rootfs $out -comp zstd -noappend
 	'';
 	installPhase = ''
-		echo "todo actually install rootfs"
+		echo "rootfs built"
 	'';
 }