forked from rosa/hakurei
Ophestra
560cb626a1
The go116 behaviour of built-in new function makes this cleaner. Signed-off-by: Ophestra <cat@gensokyo.uk>
51 lines
1.3 KiB
Go
51 lines
1.3 KiB
Go
package system
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"hakurei.app/check"
|
|
"hakurei.app/hst"
|
|
)
|
|
|
|
// Link calls LinkFileType with the [Process] criteria.
|
|
func (sys *I) Link(oldname, newname *check.Absolute) *I {
|
|
return sys.LinkFileType(Process, oldname, newname)
|
|
}
|
|
|
|
// LinkFileType maintains a hardlink until its [hst.Enablements] is no longer satisfied.
|
|
func (sys *I) LinkFileType(et hst.Enablements, oldname, newname *check.Absolute) *I {
|
|
sys.ops = append(sys.ops, &hardlinkOp{et, newname.String(), oldname.String()})
|
|
return sys
|
|
}
|
|
|
|
// hardlinkOp implements [I.LinkFileType].
|
|
type hardlinkOp struct {
|
|
et hst.Enablements
|
|
dst, src string
|
|
}
|
|
|
|
func (l *hardlinkOp) Type() hst.Enablements { return l.et }
|
|
|
|
func (l *hardlinkOp) apply(sys *I) error {
|
|
sys.msg.Verbose("linking", l)
|
|
return newOpError("hardlink", sys.link(l.src, l.dst), false)
|
|
}
|
|
|
|
func (l *hardlinkOp) revert(sys *I, ec *Criteria) error {
|
|
if ec.hasType(l.Type()) {
|
|
sys.msg.Verbosef("removing hard link %q", l.dst)
|
|
return newOpError("hardlink", sys.remove(l.dst), true)
|
|
} else {
|
|
sys.msg.Verbosef("skipping hard link %q", l.dst)
|
|
return nil
|
|
}
|
|
}
|
|
|
|
func (l *hardlinkOp) Is(o Op) bool {
|
|
target, ok := o.(*hardlinkOp)
|
|
return ok && l != nil && target != nil && *l == *target
|
|
}
|
|
|
|
func (l *hardlinkOp) Path() string { return l.src }
|
|
func (l *hardlinkOp) String() string { return fmt.Sprintf("%q from %q", l.dst, l.src) }
|