container/check: move absolute pathname

This allows use of absolute pathname values without importing container.

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

1 files changed, 0 insertions, 107 deletions

diff --git a/container/absolute.go b/container/absolute.go
deleted file mode 100644
index 637b035c..00000000
--- a/container/absolute.go
+++ /dev/null
@@ -1,107 +0,0 @@
-package container
-
-import (
-	"encoding/json"
-	"errors"
-	"fmt"
-	"path"
-	"slices"
-	"strings"
-	"syscall"
-)
-
-// AbsoluteError is returned by [NewAbs] and holds the invalid pathname.
-type AbsoluteError struct {
-	Pathname string
-}
-
-func (e *AbsoluteError) Error() string { return fmt.Sprintf("path %q is not absolute", e.Pathname) }
-func (e *AbsoluteError) Is(target error) bool {
-	var ce *AbsoluteError
-	if !errors.As(target, &ce) {
-		return errors.Is(target, syscall.EINVAL)
-	}
-	return *e == *ce
-}
-
-// Absolute holds a pathname checked to be absolute.
-type Absolute struct {
-	pathname string
-}
-
-// isAbs wraps [path.IsAbs] in case additional checks are added in the future.
-func isAbs(pathname string) bool { return path.IsAbs(pathname) }
-
-func (a *Absolute) String() string {
-	if a.pathname == zeroString {
-		panic("attempted use of zero Absolute")
-	}
-	return a.pathname
-}
-
-func (a *Absolute) Is(v *Absolute) bool {
-	if a == nil && v == nil {
-		return true
-	}
-	return a != nil && v != nil &&
-		a.pathname != zeroString && v.pathname != zeroString &&
-		a.pathname == v.pathname
-}
-
-// NewAbs checks pathname and returns a new [Absolute] if pathname is absolute.
-func NewAbs(pathname string) (*Absolute, error) {
-	if !isAbs(pathname) {
-		return nil, &AbsoluteError{pathname}
-	}
-	return &Absolute{pathname}, nil
-}
-
-// MustAbs calls [NewAbs] and panics on error.
-func MustAbs(pathname string) *Absolute {
-	if a, err := NewAbs(pathname); err != nil {
-		panic(err.Error())
-	} else {
-		return a
-	}
-}
-
-// Append calls [path.Join] with [Absolute] as the first element.
-func (a *Absolute) Append(elem ...string) *Absolute {
-	return &Absolute{path.Join(append([]string{a.String()}, elem...)...)}
-}
-
-// Dir calls [path.Dir] with [Absolute] as its argument.
-func (a *Absolute) Dir() *Absolute { return &Absolute{path.Dir(a.String())} }
-
-func (a *Absolute) GobEncode() ([]byte, error) { return []byte(a.String()), nil }
-func (a *Absolute) GobDecode(data []byte) error {
-	pathname := string(data)
-	if !isAbs(pathname) {
-		return &AbsoluteError{pathname}
-	}
-	a.pathname = pathname
-	return nil
-}
-
-func (a *Absolute) MarshalJSON() ([]byte, error) { return json.Marshal(a.String()) }
-func (a *Absolute) UnmarshalJSON(data []byte) error {
-	var pathname string
-	if err := json.Unmarshal(data, &pathname); err != nil {
-		return err
-	}
-	if !isAbs(pathname) {
-		return &AbsoluteError{pathname}
-	}
-	a.pathname = pathname
-	return nil
-}
-
-// SortAbs calls [slices.SortFunc] for a slice of [Absolute].
-func SortAbs(x []*Absolute) {
-	slices.SortFunc(x, func(a, b *Absolute) int { return strings.Compare(a.String(), b.String()) })
-}
-
-// CompactAbs calls [slices.CompactFunc] for a slice of [Absolute].
-func CompactAbs(s []*Absolute) []*Absolute {
-	return slices.CompactFunc(s, func(a *Absolute, b *Absolute) bool { return a.String() == b.String() })
-}