Initial scaffold

scripts/build-root.sh

@@ -0,0 +1,49 @@
+#!/usr/bin/env sh
+# build-root.sh — build a full Keru rootfs from scratch using Kama
+#
+# Given a make.conf (or the profile default), this:
+#   1. bootstraps the minimal toolchain (host -> cross/self)
+#   2. installs the base package set into $ROOT via Kama
+#   3. applies profile choices (init, libc, fs, net)
+#
+# This is the "fully from scratch" path — no binary base image is seeded.
+
+set -eu
+. "$(dirname "$0")/common.sh"
+
+# the target rootfs is the "$ROOT" from make.conf; default it here
+ROOT="${ROOT:-/tmp/keru/root}"
+MAKE_CONF="${1:-$KERU_ROOT/profile/make.conf}"
+[ -f "$MAKE_CONF" ] || die "make.conf not found: $MAKE_CONF"
+. "$MAKE_CONF"
+ROOT="${ROOT:-/tmp/keru/root}"
+
+KAMA="$KAMA_DIR/kama"
+[ -x "$KAMA" ] || die "kama not found at $KAMA (clone the kama repo or set KAMA_DIR)"
+[ -d "$PKGS_DIR" ] || die "kama-packages repo not found at $PKGS_DIR (set PKGS_DIR)"
+
+info "building Keru rootfs into $ROOT"
+info "profile: init=$INIT libc=$LIBC fs=$TARGET_FS kernel=$KERNEL"
+
+# stage 0 — bootstrap toolchain
+info "stage 0: bootstrap toolchain (gcc binutils glibc/musl)"
+for p in binutils gcc "$LIBC" toolchain; do
+    PKGDIR="$PKGS_DIR" "$KAMA" make "$p" || die "toolchain stage failed on $p"
+done
+
+# stage 1 — base system
+info "stage 1: base system"
+for p in "${BASE_PACKAGES[@]}"; do
+    PKGDIR="$PKGS_DIR" "$KAMA" make "$p" || die "base stage failed on $p"
+done
+
+# stage 2 — kernel + init + swappables
+info "stage 2: kernel + init"
+PKGDIR="$PKGS_DIR" "$KAMA" make "$KERNEL" || die "kernel build failed"
+PKGDIR="$PKGS_DIR" "$KAMA" make "$INIT"   || die "init build failed ($INIT)"
+
+# stage 3 — fstab/mkinitramfs for the chosen FS
+info "stage 3: finalize $TARGET_FS root"
+ROOT="$ROOT" "$KERU_ROOT/scripts/mkfs-root.sh" "$TARGET_FS"
+
+info "rootfs ready: $ROOT"