container: use absolute for pathname

This is simultaneously more efficient and less error-prone. This change caused minor API changes in multiple other packages.

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

ldd/exec.go

@@ -33,14 +33,17 @@ func Exec(ctx context.Context, p string) ([]*Entry, error) {
 		return nil, err
 	}
 
-	z := container.NewCommand(c, toolPath.String(), lddName, p)
+	z := container.NewCommand(c, toolPath, lddName, p)
 	z.Hostname = "hakurei-" + lddName
 	z.SeccompFlags |= seccomp.AllowMultiarch
 	z.SeccompPresets |= seccomp.PresetStrict
 	stdout, stderr := new(bytes.Buffer), new(bytes.Buffer)
 	z.Stdout = stdout
 	z.Stderr = stderr
-	z.Bind(container.FHSRoot, container.FHSRoot, 0).Proc(container.FHSProc).Dev(container.FHSProc, false)
+	z.
+		Bind(container.AbsFHSRoot, container.AbsFHSRoot, 0).
+		Proc(container.AbsFHSProc).
+		Dev(container.AbsFHSDev, false)
 
 	if err := z.Start(); err != nil {
 		return nil, err

ldd/path.go

@@ -1,21 +1,20 @@
 package ldd
 
 import (
-	"path"
-	"slices"
+	"hakurei.app/container"
 )
 
 // Path returns a deterministic, deduplicated slice of absolute directory paths in entries.
-func Path(entries []*Entry) []string {
-	p := make([]string, 0, len(entries)*2)
+func Path(entries []*Entry) []*container.Absolute {
+	p := make([]*container.Absolute, 0, len(entries)*2)
 	for _, entry := range entries {
-		if path.IsAbs(entry.Path) {
-			p = append(p, path.Dir(entry.Path))
+		if a, err := container.NewAbs(entry.Path); err == nil {
+			p = append(p, a.Dir())
 		}
-		if path.IsAbs(entry.Name) {
-			p = append(p, path.Dir(entry.Name))
+		if a, err := container.NewAbs(entry.Name); err == nil {
+			p = append(p, a.Dir())
 		}
 	}
-	slices.Sort(p)
-	return slices.Compact(p)
+	container.SortAbs(p)
+	return container.CompactAbs(p)
 }