Merge lp:~cwayne/livecd-rootfs/machine-info-writable into lp:livecd-rootfs

[Chris Wayne]

Add hostname and machine-info to the writable paths, so that hostnamectl can change them to create a sane default bluetooth device name

[Chris Wayne (cwayne)]

This MR depends on the following MR to systemd:
https://code.launchpad.net/~cwayne18/ubuntu/trusty/systemd/symlink-support-hostnamed/+merge/201540

[Martin Pitt (pitti)]

Looks good, thanks! But please note that other programs might try to change /etc/hostname as well, so these might need to get updated for /etc/writable/ too.

review: Approve

[Martin Pitt (pitti)]

Please don't touch all files like that if they don't exist, that could easily lead to bugs in the future when adding more files to it. I think it would be better to move the symlink creation out of the "if [ -e /etc/$f ]" check: i. e. always create the symlink, but only move existing files into /etc/writable/. Then we don't accidentally create files in /etc/writable/ which is hard to revert.

review: Needs Fixing

[lp:~cwayne/livecd-rootfs/machine-info-writable]

873. By Chris Wayne on 2014-01-20

only touch /etc/writable/machine-info

[Martin Pitt (pitti)]

Ack, thanks!

review: Approve

=== modified file 'live-build/ubuntu-touch/hooks/03-etc-writable.chroot'
--- live-build/ubuntu-touch/hooks/03-etc-writable.chroot	2013-09-30 11:59:57 +0000
+++ live-build/ubuntu-touch/hooks/03-etc-writable.chroot	2014-01-20 14:22:45 +0000
@@ -3,8 +3,9 @@
 set -x
 
 mkdir -p /etc/writable
+touch /etc/writable/machine-info
 
-for f in timezone localtime; do
+for f in timezone localtime machine-info hostname; do
     if [ -e /etc/$f ]; then
         echo "I: Moving /etc/$f to /etc/writable/"
         mv /etc/$f /etc/writable/$f