feat(sterni/exercises/aoc/2022): add basic scaffolding r/5363

I currently plan doing BQN and Nix (where it is not too annoying,
respectively). All solutions can either be executed together in a
derivation using CBQN and Tvix (!!!) or executed individually (I'll do
one file per solution for BQN and an attribute set of solutions for Nix
in a single file).

Change-Id: I7cff2ea60d06ae0f586d07779f14f5edd8f87aae
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7489
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI

4 files changed, 79 insertions, 0 deletions

diff --git a/users/sterni/exercises/aoc/2022/.skip-subtree b/users/sterni/exercises/aoc/2022/.skip-subtree
new file mode 100644
index 000000000000..39d1894495b3
--- /dev/null
+++ b/users/sterni/exercises/aoc/2022/.skip-subtree
@@ -0,0 +1 @@
+nix solutions don't use readTree and the rest is non-nix
diff --git a/users/sterni/exercises/aoc/2022/README.md b/users/sterni/exercises/aoc/2022/README.md
new file mode 100644
index 000000000000..9274265305a6
--- /dev/null
+++ b/users/sterni/exercises/aoc/2022/README.md
@@ -0,0 +1,8 @@
+# sterni's [Advent of Code 2022](adventofcode.com/2022)
+
+I'm trying to do it in BQN again to redeem myself for my unfinished [AoC 2021](../2021),
+but will allow myself falling back to another language if I get stuck, so I actually
+complete this one.
+I also plan to write additional solutions in Nix (when I have the time) in order to
+throw `//tvix/eval` against some new problems.
+We'll see how it goes, as my December promises to be quite busy.
diff --git a/users/sterni/exercises/aoc/2022/default.nix b/users/sterni/exercises/aoc/2022/default.nix
new file mode 100644
index 000000000000..ef03cd87e173
--- /dev/null
+++ b/users/sterni/exercises/aoc/2022/default.nix
@@ -0,0 +1,67 @@
+{ depot, pkgs, lib, ... }:
+
+let
+  inherit (pkgs.buildPackages) cbqn;
+
+  # input files are not checked in
+  meta.ci.skip = true;
+in
+
+depot.nix.readTree.drvTargets {
+  shell = pkgs.mkShell {
+    name = "aoc-2022-shell";
+    packages = [
+      cbqn
+      depot.tvix.eval
+    ];
+  };
+
+  bqn = pkgs.runCommand "bqn-aoc-2022"
+    {
+      nativeBuildInputs = [
+        cbqn
+      ];
+
+      aoc = builtins.path {
+        name = "bqn-aoc-2022";
+        path = ./../.;
+        # Need lib.bqn from ../ and all inputs as well as bqn files from ./*
+        filter = path: type:
+          lib.hasSuffix ".bqn" path || (
+            lib.hasPrefix (toString ./.) path
+            && (
+              type == "directory"
+              || lib.hasSuffix "/input" path
+            )
+          );
+      };
+
+      inherit meta;
+    }
+    ''
+      find "$aoc/2022" -name '*.bqn' -exec BQN {} \; | tee "$out"
+    '';
+
+  nix = import ./nix.nix { inherit lib; };
+
+  tvixed-nix = pkgs.runCommand "tvix-aoc-2022"
+    {
+      nativeBuildInputs = [
+        depot.tvix.eval
+      ];
+      solutions = builtins.path {
+        name = "nix-aoc-2022";
+        path = ./.;
+        filter = path: type:
+          type == "directory"
+          || lib.hasSuffix "nix.nix" path
+          || lib.hasSuffix "/input" path;
+      };
+
+      inherit meta;
+    }
+    ''
+      tvix-eval -E "import $solutions/nix.nix { lib = import ${pkgs.path}/lib; }" \
+        | tee "$out"
+    '';
+}
diff --git a/users/sterni/exercises/aoc/2022/nix.nix b/users/sterni/exercises/aoc/2022/nix.nix
new file mode 100644
index 000000000000..5bd3e36b5397
--- /dev/null
+++ b/users/sterni/exercises/aoc/2022/nix.nix
@@ -0,0 +1,3 @@
+{ ... }:
+
+{ }