Added NanoPi Duo target.

targets/nanopi_duo.conf

@@ -0,0 +1,52 @@
+#!/bin/bash
+
+IMAGE_MB=512
+MIRROR=http://mirrors.kernel.org/debian
+SYSTEM=debian
+ARCH=armhf
+SUITE=stretch
+
+read -r -d '' EXTRA_PACKAGES << EOF
+crda
+dnsutils
+dosfstools
+ifupdown
+iputils-ping
+isc-dhcp-client
+kmod
+less
+locales
+net-tools
+openssh-client
+openssh-server
+parted
+rfkill
+systemd
+systemd-sysv
+udev
+vim-tiny
+wireless-tools
+wpasupplicant
+EOF
+
+HOSTNAME=nanopi_duo
+LOCALE=en_US.UTF-8
+
+post_install() {
+    find "${ROOTFS}/usr/share/doc" ! -name copyright -type f -delete
+    find "${ROOTFS}/usr/share/doc" -type d -delete > /dev/null 2>&1
+    rm -rf "${ROOTFS}/usr/share/man/"*
+    rm -rf "${ROOTFS}/usr/share/info/"*
+    rm -rf "${ROOTFS}/usr/share/lintian/"*
+
+    cat >> "${ROOTFS}/etc/securetty" << EOF
+
+ttys0
+EOF
+
+    cp -r "${DIBS}/targets/nanopi_duo_overlay/"* "${ROOTFS}"
+	sed -i "s/#PermitEmptyPasswords no/PermitEmptyPasswords yes/g" ${ROOTFS}/etc/ssh/sshd_config
+	sed -i "s/#PermitRootLogin prohibit-password/PermitRootLogin yes/g" ${ROOTFS}/etc/ssh/sshd_config
+	sed -i "s/UsePAM yes/UsePAM no/g" ${ROOTFS}/etc/ssh/sshd_config
+	run_target /usr/sbin/update-rc.d firstboot defaults
+}

targets/nanopi_duo_overlay/etc/apt/apt.conf.d/02nocache

@@ -0,0 +1,4 @@
+Dir::Cache {
+  srcpkgcache "";
+  pkgcache "";
+}

targets/nanopi_duo_overlay/etc/dpkg/dpkg.cfg.d/01_smalldisk

@@ -0,0 +1,13 @@
+# block documentation
+path-exclude /usr/share/doc/*
+# keep copyright files for legal reasons
+path-include /usr/share/doc/*/copyright
+path-exclude /usr/share/man/*
+path-exclude /usr/share/groff/*
+path-exclude /usr/share/info/*
+# lintian stuff is small, but really unnecessary
+path-exclude /usr/share/lintian/*
+path-exclude /usr/share/linda/*
+# block non-us locales
+path-exclude /usr/share/locale/*
+path-include /usr/share/locale/en*

targets/nanopi_duo_overlay/etc/fstab

@@ -0,0 +1 @@
+devpts		/dev/pts	devpts	defaults,gid=5,mode=620	0	0

targets/nanopi_duo_overlay/etc/init.d/firstboot

@@ -0,0 +1,21 @@
+#!/bin/sh
+### BEGIN INIT INFO
+# Provides:          firstboot
+# Required-Start:    $remote_fs $syslog
+# Required-Stop:
+# X-Start-Before:    sshd
+# Default-Start:     S
+# Default-Stop:
+# Short-Description: First boot configuration.
+### END INIT INFO
+
+PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
+
+test "$1" = "start" || exit 0
+
+#test -f /boot/firstboot.txt && . /boot/firstboot.txt
+
+/usr/bin/ssh-keygen -A
+update-rc.d firstboot disable
+
+exit 0

targets/nanopi_duo_overlay/etc/network/interfaces.d/eth0

@@ -0,0 +1,3 @@
+auto eth0
+allow-hotplug eth0
+iface eth0 inet dhcp

targets/nanopi_duo_overlay/etc/network/interfaces.d/wlan0

@@ -0,0 +1,4 @@
+auto wlan0
+allow-hotplug wlan0
+iface wlan0 inet dhcp
+    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

targets/nanopi_duo_overlay/etc/wpa_supplicant/wpa_supplicant.conf

@@ -0,0 +1 @@
+country=US