Initial commit

examples/crane/flake.nix

@@ -0,0 +1,43 @@
+{
+  description = "An example of a shell environment with a Crane-built package";
+
+  inputs = {
+    rust.url = "git+https://forgejo.alt0r.com/braunse/rust-part";
+    nixpkgs.follows = "rust/nixpkgs";
+    parts.follows = "rust/parts";
+    rustManifest.follows = "rust/rustManifest";
+  };
+
+  outputs = inputs: inputs.parts.lib.mkFlake { inherit inputs; } {
+    imports = [ inputs.rust.flakeModules.crane ];
+
+    systems = [ "x86_64-linux" ];
+
+    perSystem =
+      { pkgs, craneLib, self', ... }: {
+        packages.rusty-hello = craneLib.buildPackage {
+          src = craneLib.cleanCargoSource (craneLib.path ./.);
+          strictDeps = true;
+        };
+
+        checks = {
+          craneCompilesRustPackage = pkgs.stdenv.mkDerivation {
+            name = "check-crane-compiles-rust-package";
+            dontUnpack = true;
+            buildPhase = ''
+              set -euo pipefail
+
+              # Check that the compilation of our trivial package yielded something we can actually execute.
+              OUTPUT="$(${self'.packages.rusty-hello}/bin/rusty-hello)"
+              if [[ "$OUTPUT" != "Rusty-Hello" ]]; then
+                echo "Received output '$OUTPUT', expected 'Rusty-Hello'" >&2
+                exit 1
+              fi
+
+              touch $out
+            '';
+          };
+        };
+      };
+  };
+}