First version

.github/workflows/release.yml

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+name: "release"
+
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  release:
+    name: "Release"
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/[email protected]
+    - uses: cachix/install-nix-action@v13
+      with:
+        nix_path: nixpkgs=channel:nixos-21.05
+    - uses: cachix/cachix-action@v10
+      with:
+        name: ninegua
+        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+    - run: nix-build
+    - name: Upload release package
+      uses: svenstaro/upload-release-action@v2
+      with:
+        repo_token: ${{ secrets.GITHUB_TOKEN }}
+        tag: ${{ github.ref }}
+        file: result/bin/*
+        file_glob: true

Makefile

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+CANISTERS=blackhole
+SRC=$(CANISTERS:%=src/%.mo)
+OBJ=$(CANISTERS:%=dist/%.wasm)
+OBJ_OPT=$(CANISTERS:%=dist/%-opt.wasm)
+IDL=$(CANISTERS:%=dist/%.did)
+MOC_OPT=--package base .vessel/base/927119e172964f4038ebc7018f9cc1b688544bfa/src
+
+build: $(OBJ) $(IDL) $(OBJ_OPT)
+
+clean:
+	rm -f dist
+
+dist:
+	@mkdir -p $@
+
+dist/%.wasm: src/%.mo | dist
+	moc $(MOC_OPT) -o $@ $<
+
+dist/%.did: src/%.mo | dist
+	moc $(MOC_OPT) --idl -o $@ $<
+
+.PHONY: build clean really-clean
+
+UTIL_DIR?=/nix/store/4gaariri115lys3l5mfip6knn0v78clp-ic-utils
+include $(UTIL_DIR)/share/mk/inc.mk

default.nix

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+{ pkgs ? import <nixpkgs> { } }:
+let
+  ic-utils = import (builtins.fetchGit {
+    url = "http://github.com/ninegua/ic-utils";
+    rev = "56d404d73dd5253372a1d50997df51e2ddc4d6fb";
+  }) { inherit pkgs; };
+  motoko-base = builtins.fetchGit {
+    url = "https://github.com/dfinity/motoko-base";
+    rev = "927119e172964f4038ebc7018f9cc1b688544bfa";
+  };
+in pkgs.stdenv.mkDerivation {
+  name = "ic-blackhole";
+  version = "0.0.0";
+  phases = [ "buildPhase" "installPhase" ];
+  src = ./.;
+  nativeBuildInputs = [ pkgs.binaryen ];
+  buildPhase = ''
+    export PATH=${ic-utils}/bin:$PATH
+    cp -r $src/* .
+    make MOC_OPT='--package base ${motoko-base}/src/' UTIL_DIR='${ic-utils}'
+  '';
+  installPhase = "mkdir -p $out/bin && install -m 644 dist/* $out/bin/";
+}

src/blackhole.mo

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+import Nat "mo:base/Nat";
+import Nat8 "mo:base/Nat8";
+import Principal "mo:base/Principal";
+
+actor {
+  public type canister_id = Principal;
+
+  public type definite_canister_settings = {
+    freezing_threshold : Nat;
+    controllers : [Principal];
+    memory_allocation : Nat;
+    compute_allocation : Nat;
+  };
+
+  public type canister_status = {
+     status : { #stopped; #stopping; #running };
+     memory_size : Nat;
+     cycles : Nat;
+     settings : definite_canister_settings;
+     module_hash : ?[Nat8];
+  };
+
+  public type IC = actor {
+   canister_status : { canister_id : canister_id } -> async canister_status;
+  };
+
+  let ic : IC = actor("aaaaa-aa");
+
+  public func canister_status(request : { canister_id : canister_id }) : async canister_status {
+    await ic.canister_status(request)
+  }
+}