syncthing-relay module: init

[delroth]

Motivation for this change

Adds a new NixOS module for the Syncthing relay server, used to improve Syncthing connectivity for users behind NATed or firewalled networks.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Fits CONTRIBUTING.md.

---

[delroth]

Thanks for the quick round of review! Addressed your comments, PTAL.

[samueldr]

Oh, I like how you have a test here.

@GrahamcOfBorg test syncthing-relay

[samueldr]

Hmmm, looks like the test infra still has the issue. Sorry for the amount of messages.

@GrahamcOfBorg build nixosTests.syncthing-relay

[GrahamcOfBorg]

Success on aarch64-linux (full log)

Attempted: nixosTests.syncthing-relay

Partial log (click to expand)

machine: exit status 1
syncing
machine: running command: sync
machine: exit status 0
test script finished in 15.86s
cleaning up
killing machine (pid 631)
vde_switch: EOF on stdin, cleaning up and exiting
vde_switch: Could not remove ctl dir '/build/vde1.ctl': Directory not empty
/nix/store/ka2ilz37f9710qj54wqh26qz8q26zx26-vm-test-run-syncthing-relay

[GrahamcOfBorg]

Success on x86_64-linux (full log)

Attempted: nixosTests.syncthing-relay

Partial log (click to expand)

machine: exit status 1
syncing
machine: running command: sync
machine: exit status 0
test script finished in 157.94s
cleaning up
killing machine (pid 600)
vde_switch: EOF on stdin, cleaning up and exiting
vde_switch: Could not remove ctl dir '/build/vde1.ctl': Directory not empty
/nix/store/6pqa87qrj0pdd8azfyyn4rbcjkl7zkpb-vm-test-run-syncthing-relay

[GrahamcOfBorg]

No attempt on x86_64-darwin (full log)

The following builds were skipped because they don't evaluate on x86_64-darwin: nixosTests.syncthing-relay

Partial log (click to expand)

while evaluating the attribute 'linux_4_14' at /private/var/lib/ofborg/repo/38dca4e3aa6bca43ea96d2fcc04e8229/builder/lnl7-mac/pkgs/top-level/all-packages.nix:14356:3:
while evaluating 'callPackageWith' at /private/var/lib/ofborg/repo/38dca4e3aa6bca43ea96d2fcc04e8229/builder/lnl7-mac/lib/customisation.nix:108:35, called from /private/var/lib/ofborg/repo/38dca4e3aa6bca43ea96d2fcc04e8229/builder/lnl7-mac/pkgs/top-level/all-packages.nix:14356:16:
while evaluating 'makeOverridable' at /private/var/lib/ofborg/repo/38dca4e3aa6bca43ea96d2fcc04e8229/builder/lnl7-mac/lib/customisation.nix:67:24, called from /private/var/lib/ofborg/repo/38dca4e3aa6bca43ea96d2fcc04e8229/builder/lnl7-mac/lib/customisation.nix:112:8:
while evaluating anonymous function at /private/var/lib/ofborg/repo/38dca4e3aa6bca43ea96d2fcc04e8229/builder/lnl7-mac/pkgs/os-specific/linux/kernel/linux-4.14.nix:1:1, called from /private/var/lib/ofborg/repo/38dca4e3aa6bca43ea96d2fcc04e8229/builder/lnl7-mac/lib/customisation.nix:69:12:
while evaluating 'buildLinux' at /private/var/lib/ofborg/repo/38dca4e3aa6bca43ea96d2fcc04e8229/builder/lnl7-mac/pkgs/top-level/all-packages.nix:14654:16, called from /private/var/lib/ofborg/repo/38dca4e3aa6bca43ea96d2fcc04e8229/builder/lnl7-mac/pkgs/os-specific/linux/kernel/linux-4.14.nix:5:1:
while evaluating 'callPackageWith' at /private/var/lib/ofborg/repo/38dca4e3aa6bca43ea96d2fcc04e8229/builder/lnl7-mac/lib/customisation.nix:108:35, called from /private/var/lib/ofborg/repo/38dca4e3aa6bca43ea96d2fcc04e8229/builder/lnl7-mac/pkgs/top-level/all-packages.nix:14654:23:
while evaluating 'makeOverridable' at /private/var/lib/ofborg/repo/38dca4e3aa6bca43ea96d2fcc04e8229/builder/lnl7-mac/lib/customisation.nix:67:24, called from /private/var/lib/ofborg/repo/38dca4e3aa6bca43ea96d2fcc04e8229/builder/lnl7-mac/lib/customisation.nix:112:8:
while evaluating anonymous function at /private/var/lib/ofborg/repo/38dca4e3aa6bca43ea96d2fcc04e8229/builder/lnl7-mac/pkgs/os-specific/linux/kernel/generic.nix:1:1, called from /private/var/lib/ofborg/repo/38dca4e3aa6bca43ea96d2fcc04e8229/builder/lnl7-mac/lib/customisation.nix:69:12:
assertion failed at /private/var/lib/ofborg/repo/38dca4e3aa6bca43ea96d2fcc04e8229/builder/lnl7-mac/pkgs/os-specific/linux/kernel/generic.nix:51:1