On 9 June 2015 at 16:07, Thijs Schreijer <th...@thijsschreijer.nl> wrote: > The config files are being read/executed in a sandbox. Hence the failure to > access the `os` table. > > I do see the usecase for `os.getenv`, but I'm no sandbox expert, so I'm > hesitating because I don't know what malicious things one could do with this > function exposed. > > Anyone else maybe?
Well, it is a readonly function accessing things that come from the user environment, so I suppose exposing it to the config loader wouldn't cause surprises. (This does not apply to the rockspec loader, because it would make rockspecs too fragile — it's better to have them interact with the "outside world" through external_dependencies only, which keeps well-defined boundaries and produces proper error messages.) We could add getenv support in the next release (as usual, patches are welcome). In the meantime, Fabio, if you use your $HOME in several machines and need config to change dynamically according which one you're logged in, you can keep several config-*.lua files in parallel and set $LUAROCKS_CONFIG to point to the appropriate config file. Example: $ hostname tennant $ ls ~/.luarocks config-tennant.lua config-smith.lua config-capaldi.lua $ echo 'export LUAROCKS_CONFIG=$HOME/.luarocks/config-$(hostname).lua' >> ~/.bashrc If you have tons of boxes, you could even make your .bashrc generate the appropriate config file based on a template during login if the file doesn't already exist. Hope this helps! -- Hisham >> -----Original Message----- >> From: Fabio Porcedda [mailto:fabio.porce...@gmail.com] >> Sent: dinsdag 9 juni 2015 6:30 >> To: luarocks-developers@lists.sourceforge.net >> Subject: [Luarocks-developers] Use an environment variable inside the >> config-5.1.lua >> >> Hi all, >> >> I need to use a linux environment variable inside the "config-5.1.lua" >> to set the "external_deps_dirs", I've used this istruction: >> >> external_deps_dirs = { os.getenv("GCC_SYSROOT") } >> >> but i got this error: >> >> Error running file: [string >> "/home/tetsuya/buildroot/br/output/host/usr/..."]:15: attempt to index >> global 'os' (a nil value) >> >> If i understand correctly the os library cannot be used in the >> "config-5.1.lua" file, there is some way to use it? >> >> Thanks and best regards >> -- >> Fabio Porcedda >> >> ---------------------------------------------------------------------------- >> -- >> _______________________________________________ >> Luarocks-developers mailing list >> Luarocks-developers@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/luarocks-developers > > ------------------------------------------------------------------------------ > _______________________________________________ > Luarocks-developers mailing list > Luarocks-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/luarocks-developers ------------------------------------------------------------------------------ _______________________________________________ Luarocks-developers mailing list Luarocks-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/luarocks-developers
