From 1d780b6f4c4dc96332cce9b32685f4642e4505e8 Mon Sep 17 00:00:00 2001
From: dawn <dawn@tangled.org>
Date: Sat, 18 Jul 2026 23:49:45 +0300
Subject: [PATCH] spindle/engines/microvm: only build on linux

Signed-off-by: dawn <dawn@tangled.org>
---
 spindle/engine_microvm_linux.go                  | 16 ++++++++++++++++
 spindle/engine_microvm_other.go                  | 16 ++++++++++++++++
 spindle/engines/microvm/agent.go                 |  2 ++
 spindle/engines/microvm/args.go                  |  2 ++
 spindle/engines/microvm/budget.go                |  2 ++
 spindle/engines/microvm/cgroup.go                |  2 ++
 spindle/engines/microvm/cgroup_oom_test.go       |  2 ++
 spindle/engines/microvm/cgroup_test.go           |  2 ++
 spindle/engines/microvm/dns_proxy.go             |  2 ++
 spindle/engines/microvm/dns_proxy_test.go        |  2 ++
 spindle/engines/microvm/engine.go                |  2 ++
 spindle/engines/microvm/engine_test.go           |  2 ++
 spindle/engines/microvm/image.go                 |  2 ++
 spindle/engines/microvm/image_test.go            |  2 ++
 spindle/engines/microvm/models.go                |  2 ++
 spindle/engines/microvm/models_test.go           |  2 ++
 spindle/engines/microvm/networking.go            |  2 ++
 spindle/engines/microvm/nixos_toplevel_cache.go  |  2 ++
 spindle/engines/microvm/qemu.go                  |  2 ++
 spindle/engines/microvm/read_cache_proxy.go      |  2 ++
 spindle/engines/microvm/read_cache_proxy_test.go |  2 ++
 spindle/engines/microvm/runner.go                |  2 ++
 spindle/engines/microvm/upload_cache_http.go     |  2 ++
 spindle/engines/microvm/upload_cache_narinfo.go  |  2 ++
 .../engines/microvm/upload_cache_nix_store.go    |  2 ++
 .../microvm/upload_cache_nix_store_test.go       |  2 ++
 spindle/engines/microvm/upload_cache_proxy.go    |  2 ++
 .../engines/microvm/upload_cache_proxy_test.go   |  2 ++
 spindle/engines/microvm/vm.go                    |  2 ++
 spindle/server.go                                |  3 +--
 30 files changed, 87 insertions(+), 2 deletions(-)
 create mode 100644 spindle/engine_microvm_linux.go
 create mode 100644 spindle/engine_microvm_other.go

diff --git a/spindle/engine_microvm_linux.go b/spindle/engine_microvm_linux.go
new file mode 100644
index 00000000..5c5551b0
--- /dev/null
+++ b/spindle/engine_microvm_linux.go
@@ -0,0 +1,16 @@
+//go:build linux
+
+package spindle
+
+import (
+	"context"
+
+	"tangled.org/core/spindle/config"
+	"tangled.org/core/spindle/db"
+	"tangled.org/core/spindle/engines/microvm"
+	"tangled.org/core/spindle/models"
+)
+
+func newMicrovmEngine(ctx context.Context, cfg *config.Config, d *db.DB) (models.Engine, error) {
+	return microvm.New(ctx, cfg, d)
+}
diff --git a/spindle/engine_microvm_other.go b/spindle/engine_microvm_other.go
new file mode 100644
index 00000000..9da4c9fc
--- /dev/null
+++ b/spindle/engine_microvm_other.go
@@ -0,0 +1,16 @@
+//go:build !linux
+
+package spindle
+
+import (
+	"context"
+	"fmt"
+
+	"tangled.org/core/spindle/config"
+	"tangled.org/core/spindle/db"
+	"tangled.org/core/spindle/models"
+)
+
+func newMicrovmEngine(context.Context, *config.Config, *db.DB) (models.Engine, error) {
+	return nil, fmt.Errorf("microvm engine is only supported on Linux")
+}
diff --git a/spindle/engines/microvm/agent.go b/spindle/engines/microvm/agent.go
index 4a6e01f3..b4342e56 100644
--- a/spindle/engines/microvm/agent.go
+++ b/spindle/engines/microvm/agent.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/args.go b/spindle/engines/microvm/args.go
index 05b370af..0b4f1c42 100644
--- a/spindle/engines/microvm/args.go
+++ b/spindle/engines/microvm/args.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/budget.go b/spindle/engines/microvm/budget.go
index 20798344..27383266 100644
--- a/spindle/engines/microvm/budget.go
+++ b/spindle/engines/microvm/budget.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/cgroup.go b/spindle/engines/microvm/cgroup.go
index 40f6b736..c6d6970f 100644
--- a/spindle/engines/microvm/cgroup.go
+++ b/spindle/engines/microvm/cgroup.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/cgroup_oom_test.go b/spindle/engines/microvm/cgroup_oom_test.go
index 5754b96a..07857377 100644
--- a/spindle/engines/microvm/cgroup_oom_test.go
+++ b/spindle/engines/microvm/cgroup_oom_test.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/cgroup_test.go b/spindle/engines/microvm/cgroup_test.go
index e8c54108..dadb4518 100644
--- a/spindle/engines/microvm/cgroup_test.go
+++ b/spindle/engines/microvm/cgroup_test.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/dns_proxy.go b/spindle/engines/microvm/dns_proxy.go
index 16e6183a..e6b99a0c 100644
--- a/spindle/engines/microvm/dns_proxy.go
+++ b/spindle/engines/microvm/dns_proxy.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/dns_proxy_test.go b/spindle/engines/microvm/dns_proxy_test.go
index a38b0f4e..cb1de34c 100644
--- a/spindle/engines/microvm/dns_proxy_test.go
+++ b/spindle/engines/microvm/dns_proxy_test.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/engine.go b/spindle/engines/microvm/engine.go
index 469e17f7..034af619 100644
--- a/spindle/engines/microvm/engine.go
+++ b/spindle/engines/microvm/engine.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/engine_test.go b/spindle/engines/microvm/engine_test.go
index 13465cd5..5a5aac7b 100644
--- a/spindle/engines/microvm/engine_test.go
+++ b/spindle/engines/microvm/engine_test.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/image.go b/spindle/engines/microvm/image.go
index efe3b6be..7c37152d 100644
--- a/spindle/engines/microvm/image.go
+++ b/spindle/engines/microvm/image.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/image_test.go b/spindle/engines/microvm/image_test.go
index 3c5f66f0..1114937c 100644
--- a/spindle/engines/microvm/image_test.go
+++ b/spindle/engines/microvm/image_test.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/models.go b/spindle/engines/microvm/models.go
index 02f3c096..f80772c2 100644
--- a/spindle/engines/microvm/models.go
+++ b/spindle/engines/microvm/models.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/models_test.go b/spindle/engines/microvm/models_test.go
index b103e4f5..256fe1ec 100644
--- a/spindle/engines/microvm/models_test.go
+++ b/spindle/engines/microvm/models_test.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/networking.go b/spindle/engines/microvm/networking.go
index 30f12dfe..81597cbe 100644
--- a/spindle/engines/microvm/networking.go
+++ b/spindle/engines/microvm/networking.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/nixos_toplevel_cache.go b/spindle/engines/microvm/nixos_toplevel_cache.go
index 8333a65c..c5f8f784 100644
--- a/spindle/engines/microvm/nixos_toplevel_cache.go
+++ b/spindle/engines/microvm/nixos_toplevel_cache.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/qemu.go b/spindle/engines/microvm/qemu.go
index c9d5c426..c4a61a68 100644
--- a/spindle/engines/microvm/qemu.go
+++ b/spindle/engines/microvm/qemu.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/read_cache_proxy.go b/spindle/engines/microvm/read_cache_proxy.go
index 65d838c5..8c5ab2fe 100644
--- a/spindle/engines/microvm/read_cache_proxy.go
+++ b/spindle/engines/microvm/read_cache_proxy.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/read_cache_proxy_test.go b/spindle/engines/microvm/read_cache_proxy_test.go
index 9ec84325..b10dac2a 100644
--- a/spindle/engines/microvm/read_cache_proxy_test.go
+++ b/spindle/engines/microvm/read_cache_proxy_test.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/runner.go b/spindle/engines/microvm/runner.go
index c08e3d84..4ec712d1 100644
--- a/spindle/engines/microvm/runner.go
+++ b/spindle/engines/microvm/runner.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/upload_cache_http.go b/spindle/engines/microvm/upload_cache_http.go
index 0310ef09..b479616f 100644
--- a/spindle/engines/microvm/upload_cache_http.go
+++ b/spindle/engines/microvm/upload_cache_http.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/upload_cache_narinfo.go b/spindle/engines/microvm/upload_cache_narinfo.go
index 26645fcf..775d20bc 100644
--- a/spindle/engines/microvm/upload_cache_narinfo.go
+++ b/spindle/engines/microvm/upload_cache_narinfo.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/upload_cache_nix_store.go b/spindle/engines/microvm/upload_cache_nix_store.go
index 70b9adde..8ec22c47 100644
--- a/spindle/engines/microvm/upload_cache_nix_store.go
+++ b/spindle/engines/microvm/upload_cache_nix_store.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/upload_cache_nix_store_test.go b/spindle/engines/microvm/upload_cache_nix_store_test.go
index 413fb66d..bf9d4af7 100644
--- a/spindle/engines/microvm/upload_cache_nix_store_test.go
+++ b/spindle/engines/microvm/upload_cache_nix_store_test.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/upload_cache_proxy.go b/spindle/engines/microvm/upload_cache_proxy.go
index 9b9385d2..4cd65f90 100644
--- a/spindle/engines/microvm/upload_cache_proxy.go
+++ b/spindle/engines/microvm/upload_cache_proxy.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/upload_cache_proxy_test.go b/spindle/engines/microvm/upload_cache_proxy_test.go
index ef4e6405..5697f12f 100644
--- a/spindle/engines/microvm/upload_cache_proxy_test.go
+++ b/spindle/engines/microvm/upload_cache_proxy_test.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/engines/microvm/vm.go b/spindle/engines/microvm/vm.go
index a27f9020..039d0532 100644
--- a/spindle/engines/microvm/vm.go
+++ b/spindle/engines/microvm/vm.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package microvm
 
 import (
diff --git a/spindle/server.go b/spindle/server.go
index d631c578..7de46342 100644
--- a/spindle/server.go
+++ b/spindle/server.go
@@ -36,7 +36,6 @@ import (
 	"tangled.org/core/spindle/db"
 	"tangled.org/core/spindle/engine"
 	"tangled.org/core/spindle/engines/dummy"
-	"tangled.org/core/spindle/engines/microvm"
 	"tangled.org/core/spindle/engines/nixery"
 	"tangled.org/core/spindle/git"
 	"tangled.org/core/spindle/models"
@@ -352,7 +351,7 @@ func Run(ctx context.Context) error {
 		return err
 	}
 
-	microvmEng, err := microvm.New(ctx, cfg, d)
+	microvmEng, err := newMicrovmEngine(ctx, cfg, d)
 	if err != nil {
 		return err
 	}
-- 
2.51.2