From 82c90dad16a6a3e01688621c746114da7ddc0c8e Mon Sep 17 00:00:00 2001
From: Johan Gunnarsson <johan.gunnarsson@gmail.com>
Date: Sat, 16 Mar 2019 21:33:09 +0100
Subject: [PATCH] Code dump

Support for Banana Pi M1 only for now.
---
 Dockerfile                                    | 20 +++++
 build-boot-allwinner                          | 22 +++++
 build-debian                                  | 83 +++++++++++++++++++
 build-image                                   | 14 ++++
 build-u_boot                                  | 40 +++++++++
 post-2nd-stage-files/etc/fstab                |  3 +
 post-2nd-stage-files/etc/hostname             |  1 +
 .../etc/network/interfaces.d/eth0             |  2 +
 .../etc/network/interfaces.d/lo               |  2 +
 post-2nd-stage-files/root/README.txt          | 21 +++++
 .../initramfs/post-update.d/zz-update-uimg    | 21 +++++
 .../etc/kernel/postrm.d/zz-remove-uimg        |  8 ++
 rebuild                                       | 16 ++++
 13 files changed, 253 insertions(+)
 create mode 100644 Dockerfile
 create mode 100755 build-boot-allwinner
 create mode 100755 build-debian
 create mode 100755 build-image
 create mode 100755 build-u_boot
 create mode 100755 post-2nd-stage-files/etc/fstab
 create mode 100755 post-2nd-stage-files/etc/hostname
 create mode 100644 post-2nd-stage-files/etc/network/interfaces.d/eth0
 create mode 100644 post-2nd-stage-files/etc/network/interfaces.d/lo
 create mode 100755 post-2nd-stage-files/root/README.txt
 create mode 100755 pre-2nd-stage-files/etc/initramfs/post-update.d/zz-update-uimg
 create mode 100755 pre-2nd-stage-files/etc/kernel/postrm.d/zz-remove-uimg
 create mode 100755 rebuild

diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..2f899e8
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,20 @@
+FROM debian:latest
+RUN apt-get update
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get -y install debootstrap \
+                       debian-archive-keyring \
+                       git \
+                       crossbuild-essential-arm64 \
+                       crossbuild-essential-armhf \
+                       qemu-user-static \
+                       device-tree-compiler \
+                       bison \
+                       flex \
+                       python-dev \
+                       swig \
+                       parted \
+                       e2fsprogs \
+                       pwgen
+ENV PATH="/debimg:${PATH}"
+COPY . /debimg
+WORKDIR /debimg
diff --git a/build-boot-allwinner b/build-boot-allwinner
new file mode 100755
index 0000000..2f07682
--- /dev/null
+++ b/build-boot-allwinner
@@ -0,0 +1,22 @@
+#!/bin/sh
+# Build SD card image
+
+IMAGE="${1}" # For example "boot-bananapi.bin"
+DEFCONFIG="${2}" # For example "Bananapi_defconfig"
+TUPLE="${3}" # For example "arm-linux-gnueabihf"
+
+set -e
+
+# Create fresh empty directory
+TMP=$(mktemp -d tmp.XXXXXX)
+cd "${TMP}"
+
+build-image tmp.img
+build-u_boot u-boot "${DEFCONFIG}" "${TUPLE}"
+
+# Copy U-Boot to 8192 bytes from start
+dd if=u-boot/u-boot-sunxi-with-spl.bin of=tmp.img bs=1K seek=8
+
+truncate -s 32M tmp.img
+gzip tmp.img
+cp tmp.img.gz "${IMAGE}.bin.gz"
diff --git a/build-debian b/build-debian
new file mode 100755
index 0000000..c238976
--- /dev/null
+++ b/build-debian
@@ -0,0 +1,83 @@
+#!/bin/sh
+# Build Debian root filesystem
+
+IMAGE2="$1"
+ARCH="$2"
+DIST="$3"
+
+set -e
+
+case "${ARCH}" in
+armhf)
+	KERNEL=linux-image-armmp
+	;;
+arm64)
+	KERNEL=linux-image-arm64
+	;;
+*)
+	echo "Can't decide kernel package for \"${ARCH}\""
+	exit 1
+	;;
+esac
+
+# Create fresh empty directory
+TMP=$(mktemp -d tmp.XXXXXX)
+cd "${TMP}"
+
+# Build a Debian root filesystem (first stage)
+debootstrap \
+  --arch="${ARCH}" \
+  --verbose \
+  --variant=minbase \
+  --foreign \
+  --include=\
+netbase,\
+ifupdown,\
+net-tools,\
+isc-dhcp-client,\
+${KERNEL},\
+systemd-sysv,\
+u-boot-tools,\
+openssh-server \
+  "${DIST}" \
+  debian \
+  "http://ftp.se.debian.org/debian/"
+
+# Randomly generated root password
+PASSWORD=$(pwgen -B -A 8 1)
+
+cp -rv --preserve=mode ../pre-2nd-stage-files/* debian
+
+# Copy ARM emulation stuff
+cp /usr/bin/qemu-*-static debian/usr/bin
+
+# Build a Debian root filesystem (second stage)
+chroot debian sh -e <<- EOF
+	/debootstrap/debootstrap --second-stage
+	/usr/bin/apt-get clean
+	/bin/rm -rf /var/lib/apt/lists/*
+	/bin/rm -f /var/log/*.log
+	/bin/echo root:${PASSWORD} | /usr/sbin/chpasswd
+	/bin/sed -i "s/#*\s*PermitRootLogin .*/PermitRootLogin yes/" /etc/ssh/sshd_config
+EOF
+
+# Remove ARM emulation stuff again
+rm debian/usr/bin/qemu-*-static
+
+cp -rv --preserve=mode ../post-2nd-stage-files/* debian
+
+# Write apt sources config
+cat <<- EOF > debian/etc/apt/sources.list
+	deb http://deb.debian.org/debian ${DIST} main
+	deb-src http://deb.debian.org/debian ${DIST} main
+	deb http://security.debian.org/debian-security ${DIST}/updates main
+	deb-src http://security.debian.org/debian-security ${DIST}/updates main
+EOF
+
+# Make a ext4 filesystem of this and put it into the image
+rm -f ext4.img
+fallocate -l 900MiB ext4.img
+mkfs.ext4 -d debian ext4.img
+gzip ext4.img
+
+cp ext4.img.gz "${IMAGE2}-${PASSWORD}.bin.gz"
diff --git a/build-image b/build-image
new file mode 100755
index 0000000..a7f6f01
--- /dev/null
+++ b/build-image
@@ -0,0 +1,14 @@
+#!/bin/sh
+# Build empty image
+
+IMAGE="${1}"
+
+set -e
+
+rm -f "${IMAGE}"
+fallocate -l 1GB "${IMAGE}" # 1,000,000,000 bytes
+
+parted -s "${IMAGE}" mklabel msdos
+parted -s "${IMAGE}" mkpart primary fat32 -- 1MiB 32MiB # 31 MiB (32,505,856 bytes)
+parted -s "${IMAGE}" mkpart primary ext2 -- 32MiB -1
+parted -s "${IMAGE}" set 2 boot on
diff --git a/build-u_boot b/build-u_boot
new file mode 100755
index 0000000..1b24ebf
--- /dev/null
+++ b/build-u_boot
@@ -0,0 +1,40 @@
+#!/bin/sh
+# Download and build latest version of U-Boot
+
+UBOOTDIR="${1}"
+DEFCONFIG="${2}"
+TUPLE="${3}"
+
+set -e
+
+# U-Boot version to build
+VERSION=$(git ls-remote --tags --refs "git://git.denx.de/u-boot.git" "v????.??" | \
+          cut -f 2 | \
+          grep -o "v....\..." | \
+          tail -n 1)
+
+# Download U-Boot
+git clone -b "$VERSION" --depth 1 "git://git.denx.de/u-boot.git" "${UBOOTDIR}"
+
+# Step into U-Boot directory
+cd "${UBOOTDIR}"
+
+# Setup ARCH
+case "${TUPLE}" in
+arm-*)
+	export ARCH="arm"
+	;;
+aarch64-*)
+	export ARCH="aarch64"
+	;;
+*)
+	echo "Can't decide \$ARCH for tuple \"${TUPLE}\""
+	exit 1
+	;;
+esac
+
+# CROSS_COMPILE must point to a valid compiler path prefix
+export CROSS_COMPILE=$(dirname $(which "${TUPLE}-gcc"))/"${TUPLE}-"
+
+# Build U-Boot
+make "${DEFCONFIG}" && make
diff --git a/post-2nd-stage-files/etc/fstab b/post-2nd-stage-files/etc/fstab
new file mode 100755
index 0000000..2f89eb6
--- /dev/null
+++ b/post-2nd-stage-files/etc/fstab
@@ -0,0 +1,3 @@
+# <file system> <mount point>   <type>  <options>       <dump>  <pass>
+tmpfs           /tmp            tmpfs   nodev,nosuid    0       0
+tmpfs           /var/tmp        tmpfs   nodev,nosuid    0       0
diff --git a/post-2nd-stage-files/etc/hostname b/post-2nd-stage-files/etc/hostname
new file mode 100755
index 0000000..2dee175
--- /dev/null
+++ b/post-2nd-stage-files/etc/hostname
@@ -0,0 +1 @@
+debian
diff --git a/post-2nd-stage-files/etc/network/interfaces.d/eth0 b/post-2nd-stage-files/etc/network/interfaces.d/eth0
new file mode 100644
index 0000000..81922ce
--- /dev/null
+++ b/post-2nd-stage-files/etc/network/interfaces.d/eth0
@@ -0,0 +1,2 @@
+auto eth0
+iface eth0 inet dhcp
diff --git a/post-2nd-stage-files/etc/network/interfaces.d/lo b/post-2nd-stage-files/etc/network/interfaces.d/lo
new file mode 100644
index 0000000..f1bd92e
--- /dev/null
+++ b/post-2nd-stage-files/etc/network/interfaces.d/lo
@@ -0,0 +1,2 @@
+auto lo
+iface lo inet loopback
diff --git a/post-2nd-stage-files/root/README.txt b/post-2nd-stage-files/root/README.txt
new file mode 100755
index 0000000..398131f
--- /dev/null
+++ b/post-2nd-stage-files/root/README.txt
@@ -0,0 +1,21 @@
+HOW TO CHANGE ROOT PASSWORD
+---------------------------
+
+1. It is strongly recommended that you change the root password:
+
+# passwd root
+
+HOW TO RESIZE ROOT FILESYSTEM PARTITION
+---------------------------------------
+
+1. Maximize size of rootfs partition in:
+
+# parted -s /dev/mmcblk0 resizepart -- 2 -1
+
+2. Reload partition table:
+
+# partprobe
+
+3. Expand ext4 filesystem:
+
+# resize2fs /dev/mmcblk0p2
diff --git a/pre-2nd-stage-files/etc/initramfs/post-update.d/zz-update-uimg b/pre-2nd-stage-files/etc/initramfs/post-update.d/zz-update-uimg
new file mode 100755
index 0000000..d7208d9
--- /dev/null
+++ b/pre-2nd-stage-files/etc/initramfs/post-update.d/zz-update-uimg
@@ -0,0 +1,21 @@
+#!/bin/sh
+# Generate initrd.uimg and update U-Boot boot.scr
+
+# Kernel ABI string
+ABI="${1}"
+
+# Create U-Boot ramdisk image
+mkimage -A arm -T ramdisk -C none -d "/boot/initrd.img-${ABI}" "/boot/initrd.uimg-${ABI}"
+
+# Create U-Boot boot script
+cat << EOF > /boot/boot.cmd
+mmc dev 0
+ext4load mmc 0:2 \${kernel_addr_r} /boot/vmlinuz-${ABI}
+ext4load mmc 0:2 \${ramdisk_addr_r} /boot/initrd.uimg-${ABI}
+ext4load mmc 0:2 \${fdt_addr_r} /usr/lib/linux-image-${ABI}/\${fdtfile}
+setenv bootargs "root=/dev/mmcblk0p2 rw rootwait earlyprintk"
+bootz \${kernel_addr_r} \${ramdisk_addr_r} \${fdt_addr_r}
+EOF
+
+# Create U-Boot boot script
+mkimage -A arm -T script -C none -d /boot/boot.cmd /boot/boot.scr
diff --git a/pre-2nd-stage-files/etc/kernel/postrm.d/zz-remove-uimg b/pre-2nd-stage-files/etc/kernel/postrm.d/zz-remove-uimg
new file mode 100755
index 0000000..432b096
--- /dev/null
+++ b/pre-2nd-stage-files/etc/kernel/postrm.d/zz-remove-uimg
@@ -0,0 +1,8 @@
+#!/bin/sh
+# Generate initrd.uimg and update U-Boot boot.scr
+
+# Kernel ABI string
+ABI="${1}"
+
+# Delete U-Boot ramdisk image
+rm -f "/boot/initrd.uimg-${ABI}"
diff --git a/rebuild b/rebuild
new file mode 100755
index 0000000..e9a6af6
--- /dev/null
+++ b/rebuild
@@ -0,0 +1,16 @@
+#!/bin/sh
+# Rebuild everything
+
+DOCKEROPTS1="--rm -v /tmp/artifacts:/artifacts"
+DOCKEROPTS2="--privileged $DOCKEROPTS1"
+
+mkdir -p /tmp/artifacts || exit
+
+# Build Docker image
+docker build -t debimg .
+
+# Build bootloaders
+docker run $DOCKEROPTS1 debimg build-boot-allwinner "/artifacts/boot-bananapi" "Bananapi_defconfig" "arm-linux-gnueabihf"
+
+# Build root filesystems
+docker run $DOCKEROPTS2 debimg build-debian "/artifacts/debian-buster-armhf" "armhf" "buster"