all: use filepath

This makes package check portable, and removes nonportable behaviour from package pkg, pipewire, and system. All other packages remain nonportable due to their nature. No latency increase was observed due to this change on amd64 and arm64 linux.

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

vfs/mountinfo_test.go

@@ -5,7 +5,7 @@ import (
 	"errors"
 	"iter"
 	"os"
-	"path"
+	"path/filepath"
 	"reflect"
 	"slices"
 	"strconv"
@@ -394,7 +394,7 @@ func mn(
 		},
 		FirstChild:  firstChild,
 		NextSibling: nextSibling,
-		Clean:       path.Clean(target),
+		Clean:       filepath.Clean(target),
 		Covered:     covered,
 	}
 }

vfs/unfold.go

@@ -2,7 +2,7 @@ package vfs
 
 import (
 	"iter"
-	"path"
+	"path/filepath"
 	"strings"
 )
 
@@ -43,7 +43,7 @@ func (n *MountInfoNode) visit(yield func(*MountInfoNode) bool) bool {
 
 // Unfold unfolds the mount hierarchy and resolves covered paths.
 func (d *MountInfoDecoder) Unfold(target string) (*MountInfoNode, error) {
-	targetClean := path.Clean(target)
+	targetClean := filepath.Clean(target)
 
 	var mountinfoSize int
 	for range d.Entries() {
@@ -61,7 +61,7 @@ func (d *MountInfoDecoder) Unfold(target string) (*MountInfoNode, error) {
 	{
 		i := 0
 		for ent := range d.Entries() {
-			mountinfo[i] = &MountInfoNode{Clean: path.Clean(ent.Target), MountInfoEntry: ent}
+			mountinfo[i] = &MountInfoNode{Clean: filepath.Clean(ent.Target), MountInfoEntry: ent}
 			idIndex[ent.ID] = i
 			if mountinfo[i].Clean == targetClean {
 				targetIndex = i