Add scripts to modify a root filesystem for the vision pi
Change-Id: I6bbcafa92d8233914ce47c11f35d2a9dd24a1489
diff --git a/y2020/vision/rootfs/change_hostname.sh b/y2020/vision/rootfs/change_hostname.sh
new file mode 100755
index 0000000..1842504
--- /dev/null
+++ b/y2020/vision/rootfs/change_hostname.sh
@@ -0,0 +1,40 @@
+#!/bin/bash
+
+set -euo pipefail
+
+HOSTNAME="$1"
+
+if [[ ! "${HOSTNAME}" =~ ^pi-[0-9]*-[0-9]$ ]]; then
+ echo "Invalid hostname ${HOSTNAME}, needs to be pi-[team#]-[pi#]"
+ exit 1
+fi
+
+TEAM_NUMBER="$(echo ${HOSTNAME} | sed 's/pi-\(.*\)-.*/\1/')"
+PI_NUMBER="$(echo ${HOSTNAME} | sed 's/pi-.*-\(.*\)/\1/')"
+IP_BASE="$(echo ${TEAM_NUMBER} | sed 's/\(.*\)\(..\)/10.\1.\2/')"
+IP="${IP_BASE}.$(( 100 + ${PI_NUMBER}))"
+
+echo "Changing to team number ${TEAM_NUMBER}, IP ${IP}"
+
+sed -i "s/^static ip_address=.*$/static ip_address=${IP}\/24/" /etc/dhcpcd.conf
+
+sed -i "s/\(127\.0\.1\.1\t\).*$/\1${HOSTNAME}/" /etc/hosts
+
+echo "${HOSTNAME}" > /etc/hostname
+
+if grep /etc/hosts '^10\.[0-9]*\.[0-9]*\.[0-9]*\s*pi-[0-9]*-[0-9] pi[0-9]$' /etc/hosts >/dev/null ;
+then
+ sed -i "s/^10\.[0-9]*\.[0-9]*\(\.[0-9]*\s*pi-\)[0-9]*\(-[0-9] pi[0-9]\)$/${IP_BASE}\1${TEAM_NUMBER}\2/" /etc/hosts
+else
+ for i in {1..6}; do
+ echo -e "${IP_BASE}.$(( i + 100 ))\tpi-${TEAM_NUMBER}-${i} pi${i}" >> /etc/hosts
+ done
+fi
+
+if grep '^10\.[0-9]*\.[0-9]*\.2\s*roborio$' /etc/hosts >/dev/null;
+then
+ sed -i "s/^10\.[0-9]*\.[0-9]*\(\.2\s*roborio\)$/${IP_BASE}\1/" /etc/hosts
+else
+ echo -e "${IP_BASE}.2\troborio" >> /etc/hosts
+fi
+