container/ops: move Op type to init file

This helps with the eventual separation of all setup ops into individual files.

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

container/init.go

@@ -9,6 +9,7 @@ import (
 	"os/signal"
 	"path"
 	"runtime"
+	"slices"
 	"strconv"
 	. "syscall"
 	"time"
@@ -37,6 +38,39 @@ const (
 	setupEnv = "HAKUREI_SETUP"
 )
 
+type (
+	// Ops is a collection of [Op].
+	Ops []Op
+
+	// Op is a generic setup step ran inside the container init.
+	// Implementations of this interface are sent as a stream of gobs.
+	Op interface {
+		// early is called in host root.
+		early(state *setupState) error
+		// apply is called in intermediate root.
+		apply(state *setupState) error
+
+		prefix() string
+		Is(op Op) bool
+		fmt.Stringer
+	}
+
+	// setupState persists context between Ops.
+	setupState struct {
+		nonrepeatable uintptr
+		*Params
+	}
+)
+
+// Grow grows the slice Ops points to using [slices.Grow].
+func (f *Ops) Grow(n int) { *f = slices.Grow(*f, n) }
+
+const (
+	nrAutoEtc = 1 << iota
+	nrAutoRoot
+)
+
+// initParams are params passed from parent.
 type initParams struct {
 	Params
 

container/ops.go

@@ -24,36 +24,6 @@ const (
 	intermediatePatternTmpfile = "tmp.*"
 )
 
-const (
-	nrAutoEtc = 1 << iota
-	nrAutoRoot
-)
-
-type (
-	Ops []Op
-
-	// Op is a generic setup step ran inside the container init.
-	// Implementations of this interface are sent as a stream of gobs.
-	Op interface {
-		// early is called in host root.
-		early(state *setupState) error
-		// apply is called in intermediate root.
-		apply(state *setupState) error
-
-		prefix() string
-		Is(op Op) bool
-		fmt.Stringer
-	}
-
-	setupState struct {
-		nonrepeatable uintptr
-		*Params
-	}
-)
-
-// Grow grows the slice Ops points to using [slices.Grow].
-func (f *Ops) Grow(n int) { *f = slices.Grow(*f, n) }
-
 func init() { gob.Register(new(RemountOp)) }
 
 // Remount appends an [Op] that applies [RemountOp.Flags] on container path [RemountOp.Target].