add forgejo action

.forgejo/workflows/build.nix

@@ -0,0 +1,12 @@
+{pkgs?import<nixpkgs>{}}:let
+  stdenv = pkgs.clang19Stdenv;
+  name = "tengri";
+  nativeBuildInputs = with pkgs; [ grcov time rustup cloc just pkg-config libclang ];
+  buildInputs = with pkgs; [ libclang ];
+  LIBCLANG_PATH = "${pkgs.libclang.lib.outPath}/lib";
+  LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath (with pkgs; []);
+in pkgs.mkShell.override {
+  inherit stdenv;
+} {
+  inherit name nativeBuildInputs buildInputs LIBCLANG_PATH LD_LIBRARY_PATH;
+}

.forgejo/workflows/build.yaml

@@ -0,0 +1,15 @@
+on: [push]
+jobs:
+  build:
+    container:
+      image: nixos/nix:latest
+    steps:
+      - run: nix-channel --list && nix-channel --update
+      - run: nix-shell --cores 4 -p git --command 'git clone --recursive $GITHUB_SERVER_URL/$GITHUB_REPOSITORY .'
+      - run: whoami && pwd && ls -al
+      - run: nix-shell --cores 4 --command 'cloc src/ && cloc .' .forgejo/workflows/build.nix
+      - run: nix-shell --cores 4 --command 'rustup install nightly && cargo version -vv' .forgejo/workflows/build.nix
+      - run: nix-shell --cores 4 --command 'just cov-md' .forgejo/workflows/build.nix
+      - run: nix-shell --cores 4 --command 'just doc' .forgejo/workflows/build.nix
+      #- run: nix-shell --cores 4 --command 'just build-release' .forgejo/workflows/build.nix
+      #- run: nix-shell -p docker --command "docker run --security-opt seccomp=unconfined -v $PWD:/volume xd009642/tarpaulin cargo tarpaulin --out Html --all-features"

Justfile

@@ -8,3 +8,5 @@ cov:
 cov-md:
   {{covfig}} time cargo test -j4 --workspace --exclude jack --profile coverage
   {{covfig}} time grcov . -s . {{grcov-binary}} {{grcov-ignore}} -t markdown | sort
+doc:
+  cargo doc