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* build-sandbox: Move to top-level build-supportaszlig2017-11-301-75/+0
| | | | | | | This is not only useful for packaging games, so let's make it available from the vuizvui scope, so we can use it from other packages as well. Signed-off-by: aszlig <aszlig@nix.build>
* pkgs/sandbox: Handle non-existing pathsaszlig2017-11-211-9/+22
| | | | | | | | | | | | | | | | | | We now distinguish between paths that have to exist and paths that are fine to skip during bind mounting. So far we had hard failures whenever a path that needed to be mounted didn't exist, for example something like $XDG_CONFIG_HOME/unity3d failed whenever the directory didn't exist. Apart from that we now have a more clean attribute structure for sandbox parameters, which are now: * paths.required: Created prior to bind-mounting * paths.wanted: Skipped if it doesn't exist * paths.runtimeVars: Extracted from PATH-like environment variables Signed-off-by: aszlig <aszlig@nix.build>
* pkgs/build-game: Enable sandbox by defaultaszlig2017-10-031-3/+3
| | | | | | | | | This is using buildSandbox with the addition of adding LD_LIBRARY_PATH to the default runtimePathVars. I've also renamed the attribute to be called runtimePathVars instead of runtimePathVariables, simply because it's shorter. Signed-off-by: aszlig <aszlig@redmoonstudios.org>
* pkgs/sandbox: Mount paths from path-like variablesaszlig2017-10-031-3/+12
| | | | | | | | | | | | | | | | | | | | | On NixOS the LD_LIBRARY_PATH looks similar to this (depending on the configuration): /run/opengl-driver/lib:/run/opengl-driver-32/lib However, we don't have these paths available within the sandbox, because so far we've only used exportReferencesGraph to gather the runtime dependencies after the build has succeeded. This obviously doesn't take into account runtime dependencies from the system itself. We are now taking care of this by using the Nix store library to query the requisities of all the paths that are contained inside path-like variables (multiple paths delimited by colons) and mount them during sandbox setup. Signed-off-by: aszlig <aszlig@redmoonstudios.org>
* pkgs/sandbox: Factor out setup routineaszlig2017-10-031-1/+2
| | | | | | | | | | This leaves sandbox.c with only the main() function and nothing else, so that whenever we have a lot of binaries to generate, the compilation time should be much lower now. The change doesn't change anything in functionality. Signed-off-by: aszlig <aszlig@redmoonstudios.org>
* pkgs/sandbox: Prepare for querying runtime pathsaszlig2017-10-031-17/+8
| | | | | | | | | | We're now using a makefile for building the sandbox and use pkg-config to pass in the flags we need for compiling against lib(nix)store. Right now the sandbox itself doesn't do anything different because we're not actually using the (incomplete) code for querying the store. Signed-off-by: aszlig <aszlig@redmoonstudios.org>
* pkgs/sandbox: Include basic runtime pathsaszlig2017-10-031-2/+2
| | | | | | | | | | | These paths are things such as /etc and /run but also the .Xauthority file, which contains the cookie to connect to the X server. What is still missing is access to the DRI libraries, which is a bit trickier, because we need to add those store paths at runtime and we need to also mount all of the dependencies. Signed-off-by: aszlig <aszlig@redmoonstudios.org>
* pkgs/sandbox: Use own store path as root directoryaszlig2017-10-031-0/+1
| | | | | | | | | | | | | | | | | | | I've already pointed out in the previous commit that using /tmp for the root directory isn't a very good idea, mainly because we can't access sockets from /tmp (eg. the X server sockets). So what we're now doing is using the store path that contains the sandbox wrappers, because that very path won't be mounted into the sandbox anyway, so we get a free directory just as an entry point. This has the main advantage that we don't need to create any temporary directories which we later need to clean up nor do we need to assume that some paths might exist in the system. For example if we'd use /usr we still have /usr/bin/env on NixOS, but if that's going to go away in the future or we are on a distro that doesn't have it at all, the sandbox setup will fail. Signed-off-by: aszlig <aszlig@redmoonstudios.org>
* pkgs/build-game: Introduce buildSandboxaszlig2017-10-031-0/+60
So far creating the sandbox has been a setup hook, however it's a bit ugly how we gathered the needed paths for the chroot file system by recursively searching for store paths. While I'd like to have the sandbox being built within the main derivation, it really isn't very practical when the build takes longer than 10 minutes. With this implementation however the sandbox builds really fast and we can also modify the sandbox without needing to rebuild a particular game. Signed-off-by: aszlig <aszlig@redmoonstudios.org>