c6febe6250
* Add pkg/fall for Fallthrough Move this into it's own package to facilitate tests. Important bug was fixed: make the names fully qualified. Add fall package to hosts, reverse, etcd, and fix kubernetes and any tests. The k8s tests are still as-is, might need a future cleanup.
77 lines
1.6 KiB
Go
77 lines
1.6 KiB
Go
// Package fall handles the fallthrough logic used in plugins that support it.
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package fall
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import (
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"github.com/coredns/coredns/plugin"
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)
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// F can be nil to allow for no fallthrough, empty allow all zones to fallthrough or
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// contain a zone list that is checked.
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type F []string
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// New returns a new F.
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func New() *F { return new(F) }
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// Through will check if we should fallthrough for qname. Note that we've named the
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// variable in each plugin "Fall", so this then reads Fall.Through().
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func (f *F) Through(qname string) bool {
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if f == nil {
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return false
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}
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if len(*f) == 0 {
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return true
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}
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zone := plugin.Zones(*f).Matches(qname)
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return zone != ""
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}
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// SetZones will set zones in f.
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func (f *F) SetZones(zones []string) {
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for i := range zones {
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zones[i] = plugin.Host(zones[i]).Normalize()
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}
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*f = zones
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}
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// Example returns an F with example.org. as the zone name.
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var Example = func() *F {
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f := F([]string{"example.org."})
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return &f
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}()
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// Zero returns a zero valued F.
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var Zero = func() *F {
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f := F([]string{})
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return &f
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}
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// IsNil returns true is f is nil.
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func (f *F) IsNil() bool { return f == nil }
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// IsZero returns true is f is zero (and not nil).
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func (f *F) IsZero() bool {
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if f == nil {
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return false
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}
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return len(*f) == 0
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}
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// Equal returns true if f and g are equal. Only useful in tests, The (possible) zones
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// are *not* checked.
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func (f *F) Equal(g *F) bool {
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if f.IsNil() {
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if g.IsNil() {
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return true
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}
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return false
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}
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if f.IsZero() {
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if g.IsZero() {
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return true
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}
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}
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if len(*f) != len(*g) {
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return false
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}
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return true
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}
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