Ophestra
d16da6da8c
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This is less error-prone, and is quite easy to integrate considering internal/app has already migrated to container.Absolute. Closes #11. Signed-off-by: Ophestra <cat@gensokyo.uk>
51 lines
1.3 KiB
Go
51 lines
1.3 KiB
Go
package system
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import (
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"fmt"
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"hakurei.app/container"
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"hakurei.app/hst"
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)
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// Link calls LinkFileType with the [Process] criteria.
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func (sys *I) Link(oldname, newname *container.Absolute) *I {
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return sys.LinkFileType(Process, oldname, newname)
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}
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// LinkFileType maintains a hardlink until its [Enablement] is no longer satisfied.
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func (sys *I) LinkFileType(et hst.Enablement, oldname, newname *container.Absolute) *I {
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sys.ops = append(sys.ops, &hardlinkOp{et, newname.String(), oldname.String()})
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return sys
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}
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// hardlinkOp implements [I.LinkFileType].
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type hardlinkOp struct {
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et hst.Enablement
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dst, src string
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}
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func (l *hardlinkOp) Type() hst.Enablement { return l.et }
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func (l *hardlinkOp) apply(sys *I) error {
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sys.msg.Verbose("linking", l)
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return newOpError("hardlink", sys.link(l.src, l.dst), false)
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}
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func (l *hardlinkOp) revert(sys *I, ec *Criteria) error {
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if ec.hasType(l.Type()) {
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sys.msg.Verbosef("removing hard link %q", l.dst)
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return newOpError("hardlink", sys.remove(l.dst), true)
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} else {
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sys.msg.Verbosef("skipping hard link %q", l.dst)
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return nil
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}
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}
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func (l *hardlinkOp) Is(o Op) bool {
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target, ok := o.(*hardlinkOp)
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return ok && l != nil && target != nil && *l == *target
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}
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func (l *hardlinkOp) Path() string { return l.src }
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func (l *hardlinkOp) String() string { return fmt.Sprintf("%q from %q", l.dst, l.src) }
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