Need a tool to easily configure environment variables one at a time

[Kristin Chuang]

The current ways to modify checkbox environment variables are:

(1) Manually create or go-through the contents of ~/snap/[snap name]/current/.config/checkbox.conf

(2) Use `checkbox-project.configure` (if it exists).
This tool will overwrite the whole ~/snap/[snap name]/current/.config/checkbox.conf file.

An additional tool to more easily modify certain environment variables is desired.

For example, say I already have an existing checkbox.conf, but I would like to update the BT MAC address only.
Currently I can either
 (1) manually locate checkbox.conf and edit the contents, or
 (2) run `checkbox-project.configure` and provide all environment variables again.
It would be more convenient to have a tool that allows us to only modify BT mac address and leave other variables untouched, e.g. something like `checkbox-project.configure --BT_ADDR xx.xx.xx.xx.xx.xx`

[Alfie Huang (alfie073)]

Attach the configure value for reference.
https://pastebin.canonical.com/197087/

[Kristin Chuang (kristinchuang)]

@kissiel,

Thanks for the fix!
Could you provide some detailed steps directly to this bug on how we can use this feature?

Thanks!

[Maciej Kisielewski (kissiel)]

Once snaps with this patch are released it will be possible to edit checkbox config using command line, like so:

$ sudo checkbox-snappy.configure OPEN_N_SSID=TestWifi WPA_N_PSK=unhackable OBEX_TARGET=D8:FB:5E:92:4E:0D

Thanks to your query I found a little bug with how numeric values were processed, and the patch for that landed here:
https://code.launchpad.net/~kissiel/checkbox-support/+git/checkbox-support/+merge/333875