From 9dad8b47c18fd4b2d919d90b33b8d7d093a3dac2 Mon Sep 17 00:00:00 2001
From: Arslaan Pathan <arslaan@arslaancodes.com>
Date: Mon, 8 Jun 2026 13:10:01 +1200
Subject: Add rootfs target, make initramfs output to $out for convenience
 rather than $out/initramfs.cpio.gz, start working on iso target

---
 nix/initramfs.nix | 29 ++++++++++++++---------------
 nix/iso.nix       | 13 +++++++++----
 nix/rootfs.nix    | 20 ++++++++++++++++----
 3 files changed, 39 insertions(+), 23 deletions(-)

(limited to 'nix')

diff --git a/nix/initramfs.nix b/nix/initramfs.nix
index db2b313..5d023c4 100644
--- a/nix/initramfs.nix
+++ b/nix/initramfs.nix
@@ -1,19 +1,18 @@
 { stdenv, kernel, busybox, cpio }:
 
 stdenv.mkDerivation {
-  name = "initramfs-yerba";
-  src = ./.;
-  buildInputs = [ cpio ];
-  buildPhase = ''
-    mkdir -p $out
-    mkdir -p initramfs/bin
-    cp -a ${busybox}/_install/* initramfs/
-    cp ${../initramfs_init} initramfs/init
-    chmod +x initramfs/init
-    cd initramfs
-    find . | cpio -o -H newc | gzip > $out/initramfs.cpio.gz
-  '';
-  installPhase = ''
-    echo "initramfs built"
-  '';
+	name = "initramfs-yerba";
+	src = ./.;
+	buildInputs = [ cpio ];
+	buildPhase = ''
+		mkdir -p initramfs/bin
+		cp -a ${busybox}/_install/* initramfs/
+		cp ${../initramfs_init} initramfs/init
+		chmod +x initramfs/init
+		cd initramfs
+		find . | cpio -o -H newc | gzip > $out
+	'';
+	installPhase = ''
+		echo "initramfs built"
+	'';
 }
diff --git a/nix/iso.nix b/nix/iso.nix
index 3c220a2..36cabf0 100644
--- a/nix/iso.nix
+++ b/nix/iso.nix
@@ -1,13 +1,18 @@
-{ stdenv, fetchgit, kernel, initramfs, limine, rootfs }:
+{ stdenv, fetchgit, kernel, initramfs, limine, rootfs, xorriso }:
 
 stdenv.mkDerivation {
 	name = "iso-yerba";
 	src = ./.;
+	buildInputs = [ xorriso ];
+	nativeBuildInputs = [ xorriso ];
 	buildPhase = ''
-		echo "todo actually build iso"
-		mkdir -p $out
+		mkdir -p iso/boot/limine 
+		mkdir -p iso/EFI/BOOT 
+		mkdir -p iso/yerba
+		cp ${linux} iso/boot/bzImage
+		cp ${initramfs} iso/boot/initramfs.cpio.gz
 	'';
 	installPhase = ''
-		echo "todo actually install iso"
+		echo "iso built"
 	'';
 }
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"
 	'';
 }
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