APT_PROXY empty value

[Lesik]

Hey,

I use no proxy to connect to the internet, and according to the README the proxy is unset by default. However, 10-bootstrap.sh still fails:

+ http_proxy=localhost:3142 debootstrap --arch=arm64 [...]
I: Retrieving InRelease 
I: Retrieving Release 
E: Failed getting release file http://ftp.debian.org/debian/dists/stretch/Release

Notice the http_proxy being set. So I try to overwrite the proxy by setting APT_PROXY="", but that doesn't help either, because of this line:

APT_PROXY=${APT_PROXY:="localhost:3142"}

If APT_PROXY is set but empty, it will be still set to localhost:3142. Check out this simplified example:

$ myvar=""
$ othervar=${myvar:="notempty"}
$ echo $othervar
notempty

[nwildner]

Maybe this proxy variable is enforced cause the instructions suggest you to install apt-cache-ng

https://github.com/michaelfranzl/rpi23-gen-image#set-up-caching-for-apt

It is zero configuration as this readme states. Install apt-proxy-ng to make localcache of all packages downloaded, so you dont have get all again whenever you need to create a new image,.

[Lesik]

Yes, I read the README. But I do not want to use apt-cache-ng.

And this line:

APT_PROXY=""

seems to suggest that if I leave the variable empty, the default value will be "".

[paulghill]

Edit the rpi23-gen-image.sh and look for APT_PROXY and change it to as follows: APT_PROXY=${APT_PROXY:=""}

[Lesik]

I fixed this for myself the second I found the bug. The point of this bug report is that it's fixed for others who may not want/be able to read (ba)sh.