Some personalization from `/boot`

[hkfuertes]

I was going to pitch this idea as a comment on another PR but its easier if I do it and show you. This PR:

• Loads the environment file as a shell script (with source)
• Mounts /boot partition
• Moves any variables file from /boot to /etc/variables.sh
• Moves any hostapd file from /boot to /etc/hostapd.conf

Its a suggestion, I'm open to anything, but this adds a layer of personalization on top, if anyone wants to use the bare images customized, without needing to build it.

[hkfuertes]

Credit to @Ioniq3 on #50 for the Bluetooth example commented on variables.sh.

[Ioniq3]

HI, in my personalization brach i use this sentences in the first boot if you need it:

   sed -i 's/wpa_passphrase=ConnectAAWirelessDongle/wpa_passphrase=1234567890/' /etc/hostapd.conf
   sed -i 's/ssid=AAWirelessDongle/ssid=AndroidAuto_'$xx'/' /etc/hostapd.conf

[nisargjhaveri]

@hkfuertes Here are some thoughts:

• Instead of calling mount directly from a new init script, we can update /etc/fstab to mount the /boot as well.
• Instead of copying the files on boot, can we directly refer to and source /boot/aawg.env.sh? Let's move /etc/aawgd.env to /boot/aawg.env.sh and source it directly.
• For the hostapd.conf:
  • If the idea behind bluetooth and wifi customization is simply to have a unique name, let's just do that for everyone without having the customize it individually.
  • In any case, I'd prefer if we can simply look at those variables and update the hostapd.conf outself, without having to update the SSID/password at both the places. This can be done via some init script later.
  • In future, we can source /boot/aawg.env.sh very early in init sequence and make the variable available to more init scripts to update hostapd.conf or to updated the syslogd log path, etc. This might help having a single file to update for customizations.

[hkfuertes]

I know this is pretty custom to my needs... I don't know if anyone is related to this changes.... or if they make any sense in any case.... I will close the PR for now. This will be here if in the future is wanted to be opened again...