Total Nixification

[nightkr]

All services have been nixified. To build and load the docker images, install Nix, run ./nix-build.sh, and then run docker-compose up as usual.

TODO

• Windows support? (unlikely, no Docker support anyway)
• Mac support? (building probably works, but I have no idea whether the Docker images will be usable)
• web-frontend fails to build ATM
• Slow rebuilds, mostly due to Docker (on my computer building and importing the Docker images without the actual components takes ~1min 10s, whereas a full non-Docker build takes ~25s and basically once in a (computer's) lifetime)
• No more reloading code without a container rebuild, wouldn't be an issue if not for the above
• Generate list of apps automatically (default.nix)
• Generate lib dependencies automatically (workspace.nix)
• Update readme with instructions on how to build, run, gc etc using nix
• Migrate Travis scripts

[indrif]

Would be nice to:

• Generate list of apps automatically (default.nix)
• Generate lib dependencies automatically (workspace.nix)
• Update readme with instructions on how to build, run, gc etc using nix

[indrif]

Tried on my mac now and get the following:

api-photos_1                            | standard_init_linux.go:190: exec user process caused "exec format error"
be-photo-import_1                       | standard_init_linux.go:190: exec user process caused "exec format error"
gateway_1                               | standard_init_linux.go:190: exec user process caused "exec format error"

[nightkr]

Looks like yarn2nix doesn't support cross-compilation at the moment. Looking into what would be required for it to function.

[nightkr]

Another (although quite ugly) alternative would be to run the nix-builds inside https://hub.docker.com/r/nixos/nix/.

[nightkr]

It seems to work fine(-ish) on Windows, building using WSL and running the containers in Docker for Windows.

Steps:

1. Install Docker for Windows
2. Install WSL and Ubuntu for WSL
3. From WSL, run:

sudo mkdir -p /etc/nix
sudo echo "use-sqlite-wal = false" >> /etc/nix/nix.conf
curl https://nixos.org/nix/install | sh

(SQLite's WAL needs to be disabled due to microsoft/WSL#2395.)
4. Install Docker inside WSL following https://medium.com/@sebagomez/installing-the-docker-client-on-ubuntus-windows-subsystem-for-linux-612b392a44c4
5. From WSL, run ./docker-build.sh (inside photo-garden)
6. Run docker-compose up

Notes:

• In my testing the nix-build is very slow inside WSL. I have no idea how much of this is due to Windows problems and how much is due to it running poorly on KVM (which is, I suppose, also a Windows problem).
• In my testing the downloads seem to fail semi-spuriously. Adding --keep-going to the nix-build invocation in docker-build.sh lets it continue downloading the rest, and then you can pick up the last stragglers by running it a second time. This is a one-time issue when setting up a new machine.

[nightkr]

After some testing with @indrif we got it to work on Mac by following https://github.com/LnL7/nix-docker#running-as-a-remote-builder.