From 6c552a2c6fe216757450c6ae07fa2e0a1b1102df Mon Sep 17 00:00:00 2001
From: Ralph Ronnquist <rrq@rrq.au>
Date: Fri, 11 Oct 2024 20:39:55 +1100
Subject: [PATCH] added debootstrapp install option

---
 trial-arm64-upgrade.sh | 72 ++++++++++++++++++++++++++++++++++++++----
 1 file changed, 65 insertions(+), 7 deletions(-)

diff --git a/trial-arm64-upgrade.sh b/trial-arm64-upgrade.sh
index 77c79a3..2ff247f 100755
--- a/trial-arm64-upgrade.sh
+++ b/trial-arm64-upgrade.sh
@@ -2,7 +2,7 @@
 # This is the boot system build script.
 : ${REPO_URL:=http://deb.devuan.org/merged}
 : ${ARCH:=arm64}
-: ${CODENAME:=daedalus}
+: ${CODENAME:=ceres}
 : ${BUILD:=$ARCH/build}
 : ${SOURCES:=$ARCH/sources}
 : ${INITRD:=$ARCH/build/initrd}
@@ -55,10 +55,13 @@ do_depends() { # package depend-tag directory
 	while read D ; do [ -z "$D" ] || unpack $D $3 || exit 1 ; done
 }
 
+typeset -A SKIP
+
 unpack() { # package directory
     local F="$(debattr $1 Filename)"
     local URL="${REPO_URL%/*}/$F"
     local DST="$MEDIA/$F"
+    [ -z "${SKIP[$1]}" ] || return 0
     [ -z "$F" ] && die "Unknown package $1"
     [ -f "$DST" ] && return 0
     local URL="${REPO_URL}/$F"
@@ -66,14 +69,27 @@ unpack() { # package directory
     note "${INDENT}Get $1"
     if ! wget -q -O $DST $URL ; then rm "$DST" ; exit 1 ; fi
     mkdir -p "$2"
-    ar p $DST data.tar.xz | tar -xJf - -C $2
+    if ar t $DST | grep -q data.tar.xz ; then
+	ar p $DST data.tar.xz | tar -xJf - --keep-directory-symlink  -C $2
+    elif ar t $DST | grep -q data.tar.gz ; then
+	 ar p $DST data.tar.gz | tar -xzf - --keep-directory-symlink -C $2
+    else
+	die unknow format $DST
+    fi
     INDENT="$INDENT  " do_depends "$1" Pre-Depends "$2" || exit 1
     INDENT="$INDENT  " do_depends "$1" Depends "$2" || exit 1
 }
 
+sillylinks() {
+    for D in bin sbin lib lib64 ; do
+	mkdir -p $INITRD/usr/$D
+	ln -s usr/$D $INITRD/$d
+    done
+}
 #=================================================================
 SECTIONS="main main/debian-installer"
 for S in $SECTIONS ; do get_source $S || die $S ; done
+sillylinks
 LINUX="$(debattr linux-image-$ARCH Depends | sed 's| .*||' )"
 VERSION="${LINUX#linux-image-}"
 KERNEL="kernel-image-$VERSION-di"
@@ -86,18 +102,16 @@ EOF
 for P in $($INITRD/bin/busybox --list) ; do
     [ -e "$INITRD/bin/$P" ] || ln -sTf busybox "$INITRD/bin/$P"
 done
-
 note "Prepare modules.dep for ${LINUX#linux-image-}"
+find $INITRD/lib/modules/$VERSION -name '*.xz' -exec unxz '{}' ';'
 ( cd $INITRD; bin/depmod -b . ${LINUX#linux-image-} )
 
-# root:toor
+# root:toor login
 heredoc $INITRD/etc/passwd <<EOF
 root:\$5\$2GEhUQzfYu.hsf7H\$b8AIIGkhToQx.VFH77MGVNcQRkPjMgYJ90.h6dqmz.7:0:0:root:/root:/bin/sh
 EOF
 
-heredoc $INITRD/etc/hostname <<EOF
-tiniest
-EOF
+echo tiniest > $INITRD/etc/hostname
 
 herescript $INITRD/sbin/boot-modules-probe <<EOF
 #!/bin/sh
@@ -123,6 +137,50 @@ boot-modules-probe
 exec /bin/setsid /bin/cttyhack /bin/sh
 EOF
 
+#======================================================================
+# Install on vda1 as ext4
+SKIP[busybox-udeb]=true       # stay with busybox-static
+SKIP[rootskel]=true           # not to install
+SKIP[mounted-partitions]=true # Provided by partman-base (not to install)
+SKIP[created-fstab]=true      # Provided by partman-base (not to install)
+
+for M in $(sed 's/#.*//') ; do unpack $M $INITRD || exit 1 ; done <<EOF
+e2fsprogs-udeb bootstrap-base devuan-keyring-udeb
+EOF
+
+sed '/fsys-tarfile/s|dpkg-deb|dpkg-debfix|' \
+    -i $INITRD/usr/share/debootstrap/functions
+herescript $INITRD/bin/dpkg-debfix <<EOF
+#/bin/sh
+if ar t "\$2" | grep -q data.tar.xz ; then
+    ar p "\$2" data.tar.xz | unxz 
+elif ar t "\$2" | grep -q data.tar.gz ; then
+    ar p "\$2" data.tar.gz | gunzip
+else
+    ar t "\$2" >&2
+    echo "unknown format: \$*" >&2
+    exit 1
+fi
+EOF
+
+herescript $INITRD/install <<EOF
+#!/bin/sh
+set -x
+modprobe -a ext4 crc32c
+mkfs.ext4 -F -m0 /dev/vda1
+mkdir -p /target
+mount -t ext4 /dev/vda1 /target
+
+ifconfig lo up
+ifconfig eth0 10.10.10.64 netmask 255.255.255.0 up
+ip route add default via 10.10.10.100 dev eth0
+
+export http_proxy=$http_proxy
+debootstrap --foreign --arch=$ARCH $CODENAME /target $REPO_URL
+chroot /target debootstrap/debootstrap --second-stage
+EOF
+
+#======================================================================
 note "Prepare $ARCH/initrd.gz"
 cp $INITRD/boot/vmlinuz* $ARCH/vmlinuz
 ( cd $INITRD ; find . | fakeroot cpio -o -H newc ) | gzip > $ARCH/initrd.gz
-- 
2.39.2