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package system
import (
"errors"
"fmt"
"os"
"syscall"
"hakurei.app/check"
"hakurei.app/hst"
)
// Ensure ensures the existence of a directory.
func (sys *I) Ensure(name *check.Absolute, perm os.FileMode, skipChmod bool) *I {
sys.ops = append(sys.ops, &mkdirOp{
et: User,
path: name.String(),
perm: perm,
skipChmod: skipChmod,
})
return sys
}
// Ephemeral ensures the existence of a directory until its [hst.Enablements] is
// no longer satisfied.
func (sys *I) Ephemeral(et hst.Enablements, name *check.Absolute, perm os.FileMode, skipChmod bool) *I {
sys.ops = append(sys.ops, &mkdirOp{
et: et,
path: name.String(),
perm: perm,
ephemeral: true,
skipChmod: skipChmod,
})
return sys
}
// mkdirOp implements [I.Ensure] and [I.Ephemeral].
type mkdirOp struct {
et hst.Enablements
path string
perm os.FileMode
ephemeral bool
skipChmod bool
}
func (m *mkdirOp) Type() hst.Enablements { return m.et }
func (m *mkdirOp) apply(sys *I) error {
sys.msg.Verbose("ensuring directory", m)
if fi, err := sys.stat(m.path); err == nil {
if !fi.IsDir() {
return newOpError("mkdir", syscall.ENOTDIR, false)
}
if !m.skipChmod && fi.Mode().Perm() != m.perm {
// directory exists, ensure mode
return newOpError("mkdir", sys.chmod(m.path, m.perm), false)
}
return nil
} else if !errors.Is(err, os.ErrNotExist) {
return newOpError("mkdir", err, false)
}
if err := sys.mkdir(m.path, m.perm); err != nil {
return newOpError("mkdir", err, false)
} else {
return nil
}
}
func (m *mkdirOp) revert(sys *I, ec *Criteria) error {
if !m.ephemeral {
// skip non-ephemeral dir and do not log anything
return nil
}
if ec.hasType(m.Type()) {
sys.msg.Verbose("destroying ephemeral directory", m)
return newOpError("mkdir", sys.remove(m.path), true)
} else {
sys.msg.Verbose("skipping ephemeral directory", m)
return nil
}
}
func (m *mkdirOp) Is(o Op) bool {
target, ok := o.(*mkdirOp)
return ok && m != nil && target != nil && *m == *target
}
func (m *mkdirOp) Path() string { return m.path }
func (m *mkdirOp) 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)
}
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