Inconsistencies between juju debug-hooks and "normal" hook environment

[Merlijn Sebrechts]

Hi


I'm developing a Charm that installs the Juju client, among other things.
I'm having some trouble getting this to work. When I use juju debug-hooks
and manually run the install hook, everything works fine. However, when the
hook is executed by Juju automatically, I get strange errors such as
"error: cannot determine juju home, required environment variables are not
set"

Both the debug-hooks and the normal hook environment execute as root.
However, a lot of env vars are different, like the home dir.

Debug-hooks:
echo ~
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