system: move out of internal

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

internal/system/mkdir.go

@@ -1,86 +0,0 @@
-package system
-
-import (
-	"errors"
-	"fmt"
-	"os"
-)
-
-// Ensure the existence and mode of a directory.
-func (sys *I) Ensure(name string, perm os.FileMode) *I {
-	sys.lock.Lock()
-	defer sys.lock.Unlock()
-
-	sys.ops = append(sys.ops, &Mkdir{User, name, perm, false})
-
-	return sys
-}
-
-// Ephemeral ensures the temporary existence and mode of a directory through the life of et.
-func (sys *I) Ephemeral(et Enablement, name string, perm os.FileMode) *I {
-	sys.lock.Lock()
-	defer sys.lock.Unlock()
-
-	sys.ops = append(sys.ops, &Mkdir{et, name, perm, true})
-
-	return sys
-}
-
-type Mkdir struct {
-	et        Enablement
-	path      string
-	perm      os.FileMode
-	ephemeral bool
-}
-
-func (m *Mkdir) Type() Enablement {
-	return m.et
-}
-
-func (m *Mkdir) apply(sys *I) error {
-	sys.println("ensuring directory", m)
-
-	// create directory
-	err := os.Mkdir(m.path, m.perm)
-	if !errors.Is(err, os.ErrExist) {
-		return sys.wrapErrSuffix(err,
-			fmt.Sprintf("cannot create directory %q:", m.path))
-	}
-
-	// directory exists, ensure mode
-	return sys.wrapErrSuffix(os.Chmod(m.path, m.perm),
-		fmt.Sprintf("cannot change mode of %q to %s:", m.path, m.perm))
-}
-
-func (m *Mkdir) revert(sys *I, ec *Criteria) error {
-	if !m.ephemeral {
-		// skip non-ephemeral dir and do not log anything
-		return nil
-	}
-
-	if ec.hasType(m) {
-		sys.println("destroying ephemeral directory", m)
-		return sys.wrapErrSuffix(os.Remove(m.path),
-			fmt.Sprintf("cannot remove ephemeral directory %q:", m.path))
-	} else {
-		sys.println("skipping ephemeral directory", m)
-		return nil
-	}
-}
-
-func (m *Mkdir) Is(o Op) bool {
-	m0, ok := o.(*Mkdir)
-	return ok && m0 != nil && *m == *m0
-}
-
-func (m *Mkdir) Path() string {
-	return m.path
-}
-
-func (m *Mkdir) String() string {
-	t := "Ensure"
-	if m.ephemeral {
-		t = TypeString(m.Type())
-	}
-	return fmt.Sprintf("mode: %s type: %s path: %q", m.perm.String(), t, m.path)
-}