internal/outcome: integrate pipewire server

This is very simple and takes almost no inputs. This is not yet hooked up to anything to prevent breaking any existing behaviour.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/outcome/sppipewire.go

@@ -0,0 +1,31 @@
+package outcome
+
+import (
+	"encoding/gob"
+
+	"hakurei.app/hst"
+	"hakurei.app/internal/pipewire"
+)
+
+func init() { gob.Register(spPipeWireOp{}) }
+
+// spPipeWireOp exports the PipeWire server to the container via SecurityContext.
+// Runs after spRuntimeOp.
+type spPipeWireOp struct{}
+
+func (s spPipeWireOp) toSystem(state *outcomeStateSys) error {
+	if state.et&hst.EPipeWire == 0 {
+		return errNotEnabled
+	}
+
+	state.sys.PipeWire(state.instance().Append("pipewire"))
+	return nil
+}
+
+func (s spPipeWireOp) toContainer(state *outcomeStateParams) error {
+	innerPath := state.runtimeDir.Append(pipewire.PW_DEFAULT_REMOTE)
+	state.env[pipewire.Remote] = innerPath.String()
+	state.params.Bind(state.instancePath().Append("pipewire"), innerPath, 0)
+
+	return nil
+}

internal/outcome/sppipewire_test.go

@@ -0,0 +1,43 @@
+package outcome
+
+import (
+	"testing"
+
+	"hakurei.app/container"
+	"hakurei.app/container/stub"
+	"hakurei.app/hst"
+	"hakurei.app/internal/pipewire"
+	"hakurei.app/internal/system"
+)
+
+func TestSpPipeWireOp(t *testing.T) {
+	t.Parallel()
+	config := hst.Template()
+
+	checkOpBehaviour(t, []opBehaviourTestCase{
+		{"not enabled", func(bool, bool) outcomeOp {
+			return spPipeWireOp{}
+		}, func() *hst.Config {
+			c := hst.Template()
+			*c.Enablements = 0
+			return c
+		}, nil, nil, nil, nil, errNotEnabled, nil, nil, nil, nil, nil},
+
+		{"success", func(bool, bool) outcomeOp {
+			return spPipeWireOp{}
+		}, hst.Template, nil, []stub.Call{}, newI().
+			// state.instance
+			Ephemeral(system.Process, m(wantInstancePrefix), 0711).
+			// toSystem
+			PipeWire(
+				m(wantInstancePrefix + "/pipewire"),
+			), sysUsesInstance(nil), nil, insertsOps(afterSpRuntimeOp(nil)), []stub.Call{
+			// this op configures the container state and does not make calls during toContainer
+		}, &container.Params{
+			Ops: new(container.Ops).
+				Bind(m(wantInstancePrefix+"/pipewire"), m("/run/user/1000/pipewire-0"), 0),
+		}, paramsWantEnv(config, map[string]string{
+			pipewire.Remote: "/run/user/1000/pipewire-0",
+		}, nil), nil},
+	})
+}