On Fri, Jun 17, 2016 at 2:42 PM, Pavneet Arora <pavneet_arora@waroc.com>
wrote:

> Unfortunately, while the mtxrun command works for a shell user:
>
>   $ mtxrun -script base --variables | grep cache
>   resolvers       | lists |   env: $SELFAUTOPARENT/texmf-cache
>   resolvers       | lists |   var: $SELFAUTOPARENT/texmf-cache
>   resolvers       | lists |   exp: /opt/context/tex/texmf-cache
>   resolvers       | lists |   res: /opt/context/tex/texmf-cache
>
> the result is the same for www-data:
>
>   $ sudo -u www-data bash -c ". /opt/context/tex/setuptex
> /opt/context/tex; mtxrun --script base --variables | grep cache"
>   resolvers       | caches | fatal error: there is no valid writable cache
> path defined
>
> I have to think that setuptex isn't able to set up the runtime
> environment for www-data, somehow?
>
>
Is  texmf-cache writable by www-data ?
When logged as  www-data, the cache writable should  be the
/home/www-data/luatex-cache/<..> folder, while the standard one is used as
readonly folder

Just make a test: in www-data home
# . /opt/context/tex/setuptex /opt/context/tex
then make a simple "Hello world" test.tex and  read the log.

-- 
luigi