Can env vars be referenced in shibboleth2.xml?

[Peter Schober]

* Wessel, Keith <kwessel at illinois.edu> [2020-10-05 23:45]:
> Just for reference, what do the substitutions look like inside your
> shibboleth2.xml? That is, what do the tokens look like that envsubst
> is replacing with values from env vars?

https://www.gnu.org/software/gettext/manual/html_node/envsubst-Invocation.html
(I wasn't aware of that too, thanks for the pointer, Ryan.)

> I guess this is just a slightly more elegant version of what I'm currently doing with sed:
> 
> sed -i "s|%SP_ENTITY_ID|$SP_ENTITY_ID|" /etc/shibboleth/shibboleth2.xml

Yup, $SP_ENTITY_ID or ${SP_ENTITY_ID}.

-peter