system: move enablements from state package

This removes the unnecessary import of the state package.

Signed-off-by: Ophestra Umiker <cat@ophivana.moe>

internal/system/acl.go

@@ -6,7 +6,6 @@ import (
 
 	"git.ophivana.moe/cat/fortify/acl"
 	"git.ophivana.moe/cat/fortify/internal/fmsg"
-	"git.ophivana.moe/cat/fortify/internal/state"
 	"git.ophivana.moe/cat/fortify/internal/verbose"
 )
 
@@ -16,7 +15,7 @@ func (sys *I) UpdatePerm(path string, perms ...acl.Perm) {
 }
 
 // UpdatePermType appends an acl update Op.
-func (sys *I) UpdatePermType(et state.Enablement, path string, perms ...acl.Perm) {
+func (sys *I) UpdatePermType(et Enablement, path string, perms ...acl.Perm) {
 	sys.lock.Lock()
 	defer sys.lock.Unlock()
 
@@ -24,12 +23,12 @@ func (sys *I) UpdatePermType(et state.Enablement, path string, perms ...acl.Perm
 }
 
 type ACL struct {
-	et    state.Enablement
+	et    Enablement
 	path  string
 	perms []acl.Perm
 }
 
-func (a *ACL) Type() state.Enablement {
+func (a *ACL) Type() Enablement {
 	return a.et
 }
 

internal/system/dbus.go

@@ -7,7 +7,6 @@ import (
 
 	"git.ophivana.moe/cat/fortify/dbus"
 	"git.ophivana.moe/cat/fortify/internal/fmsg"
-	"git.ophivana.moe/cat/fortify/internal/state"
 	"git.ophivana.moe/cat/fortify/internal/verbose"
 )
 
@@ -69,7 +68,7 @@ type DBus struct {
 	done chan struct{}
 }
 
-func (d *DBus) Type() state.Enablement {
+func (d *DBus) Type() Enablement {
 	return Process
 }
 

internal/system/enablement.go

@@ -0,0 +1,46 @@
+package system
+
+type (
+	// Enablement represents an optional system resource
+	Enablement uint8
+	// Enablements represents optional system resources to share
+	Enablements uint64
+)
+
+const (
+	EWayland Enablement = iota
+	EX11
+	EDBus
+	EPulse
+)
+
+var enablementString = [...]string{
+	EWayland: "Wayland",
+	EX11:     "X11",
+	EDBus:    "D-Bus",
+	EPulse:   "PulseAudio",
+}
+
+const ELen = len(enablementString)
+
+func (e Enablement) String() string {
+	return enablementString[e]
+}
+
+func (e Enablement) Mask() Enablements {
+	return 1 << e
+}
+
+// Has returns whether a feature is enabled
+func (es *Enablements) Has(e Enablement) bool {
+	return *es&e.Mask() != 0
+}
+
+// Set enables a feature
+func (es *Enablements) Set(e Enablement) {
+	if es.Has(e) {
+		panic("enablement " + e.String() + " set twice")
+	}
+
+	*es |= e.Mask()
+}

internal/system/mkdir.go

@@ -6,7 +6,6 @@ import (
 	"os"
 
 	"git.ophivana.moe/cat/fortify/internal/fmsg"
-	"git.ophivana.moe/cat/fortify/internal/state"
 	"git.ophivana.moe/cat/fortify/internal/verbose"
 )
 
@@ -19,7 +18,7 @@ func (sys *I) Ensure(name string, perm os.FileMode) {
 }
 
 // Ephemeral ensures the temporary existence and mode of a directory through the life of et.
-func (sys *I) Ephemeral(et state.Enablement, name string, perm os.FileMode) {
+func (sys *I) Ephemeral(et Enablement, name string, perm os.FileMode) {
 	sys.lock.Lock()
 	defer sys.lock.Unlock()
 
@@ -27,13 +26,13 @@ func (sys *I) Ephemeral(et state.Enablement, name string, perm os.FileMode) {
 }
 
 type Mkdir struct {
-	et        state.Enablement
+	et        Enablement
 	path      string
 	perm      os.FileMode
 	ephemeral bool
 }
 
-func (m *Mkdir) Type() state.Enablement {
+func (m *Mkdir) Type() Enablement {
 	return m.et
 }
 

internal/system/op.go

@@ -4,19 +4,17 @@ import (
 	"errors"
 	"fmt"
 	"sync"
-
-	"git.ophivana.moe/cat/fortify/internal/state"
 )
 
 const (
-	// Process type is unconditionally reverted on exit.
-	Process = state.EnableLength + 1
 	// User type is reverted at final launcher exit.
-	User = state.EnableLength
+	User = Enablement(ELen)
+	// Process type is unconditionally reverted on exit.
+	Process = Enablement(ELen + 1)
 )
 
 type Criteria struct {
-	*state.Enablements
+	*Enablements
 }
 
 func (ec *Criteria) hasType(o Op) bool {
@@ -31,7 +29,7 @@ func (ec *Criteria) hasType(o Op) bool {
 // Op is a reversible system operation.
 type Op interface {
 	// Type returns Op's enablement type.
-	Type() state.Enablement
+	Type() Enablement
 
 	// apply the Op
 	apply(sys *I) error
@@ -43,7 +41,7 @@ type Op interface {
 	String() string
 }
 
-func TypeString(e state.Enablement) string {
+func TypeString(e Enablement) string {
 	switch e {
 	case User:
 		return "User"

internal/system/tmpfiles.go

@@ -9,7 +9,6 @@ import (
 
 	"git.ophivana.moe/cat/fortify/acl"
 	"git.ophivana.moe/cat/fortify/internal/fmsg"
-	"git.ophivana.moe/cat/fortify/internal/state"
 	"git.ophivana.moe/cat/fortify/internal/verbose"
 )
 
@@ -19,7 +18,7 @@ func (sys *I) CopyFile(dst, src string) {
 }
 
 // CopyFileType registers a file copying Op labelled with type et.
-func (sys *I) CopyFileType(et state.Enablement, dst, src string) {
+func (sys *I) CopyFileType(et Enablement, dst, src string) {
 	sys.lock.Lock()
 	sys.ops = append(sys.ops, &Tmpfile{et, tmpfileCopy, dst, src})
 	sys.lock.Unlock()
@@ -33,7 +32,7 @@ func (sys *I) Link(oldname, newname string) {
 }
 
 // LinkFileType registers a file linking Op labelled with type et.
-func (sys *I) LinkFileType(et state.Enablement, oldname, newname string) {
+func (sys *I) LinkFileType(et Enablement, oldname, newname string) {
 	sys.lock.Lock()
 	defer sys.lock.Unlock()
 
@@ -46,7 +45,7 @@ func (sys *I) Write(dst, src string) {
 }
 
 // WriteType registers a file writing Op labelled with type et.
-func (sys *I) WriteType(et state.Enablement, dst, src string) {
+func (sys *I) WriteType(et Enablement, dst, src string) {
 	sys.lock.Lock()
 	sys.ops = append(sys.ops, &Tmpfile{et, tmpfileWrite, dst, src})
 	sys.lock.Unlock()
@@ -61,12 +60,12 @@ const (
 )
 
 type Tmpfile struct {
-	et       state.Enablement
+	et       Enablement
 	method   uint8
 	dst, src string
 }
 
-func (t *Tmpfile) Type() state.Enablement {
+func (t *Tmpfile) Type() Enablement {
 	return t.et
 }
 

internal/system/xhost.go

@@ -4,7 +4,6 @@ import (
 	"fmt"
 
 	"git.ophivana.moe/cat/fortify/internal/fmsg"
-	"git.ophivana.moe/cat/fortify/internal/state"
 	"git.ophivana.moe/cat/fortify/internal/verbose"
 	"git.ophivana.moe/cat/fortify/xcb"
 )
@@ -19,8 +18,8 @@ func (sys *I) ChangeHosts(username string) {
 
 type XHost string
 
-func (x XHost) Type() state.Enablement {
-	return state.EnableX
+func (x XHost) Type() Enablement {
+	return EX11
 }
 
 func (x XHost) apply(_ *I) error {