add buildGoModule override example

Signed-off-by: Xe Iaso <me@xeiaso.net>

3 files changed, 25 insertions, 1 deletions

diff --git a/flake.nix b/flake.nix
index 3317105..326e48b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -134,13 +134,20 @@
             echo "go-wasip1-dev-${wasigo.shortRev}" > $out/VERSION
             cp -vrf ${wasigo}/* $out
           '';
-        });
+        }) // {
+          GOOS = "wasip1";
+          GOARCH = "wasm";
+        };
 
         gowasi = pkgs.writeShellScriptBin "gowasi" ''
           export GOOS=wasip1
           export GOARCH=wasm
           exec ${wasigo'}/bin/go $*
         '';
+
+        buildGoWasiModule = pkgs.callPackage "${nixpkgs}/pkgs/build-support/go/module.nix" {
+          go = wasigo';
+        };
       in {
         overlays.default = final: prev:
           let
@@ -153,6 +160,13 @@
 
           wasigo = wasigo';
 
+          wasigoExample = buildGoWasiModule {
+            pname = "wasigo-example";
+            version = "latest";
+            src = ./wasm;
+            vendorHash = null;
+          };
+
           mastosan-wasm = naersk'.buildPackage {
             src = ./web/mastosan;
             targets = [ "wasm32-wasi" ];
diff --git a/wasm/go.mod b/wasm/go.mod
new file mode 100644
index 0000000..900b645
--- /dev/null
+++ b/wasm/go.mod
@@ -0,0 +1,3 @@
+module foo.bar/wasm
+
+go 1.20
diff --git a/wasm/main.go b/wasm/main.go
new file mode 100644
index 0000000..7eab755
--- /dev/null
+++ b/wasm/main.go
@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("testing a wasm module from buildGoWasiModule")
+}