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util/cmpx: remove code that's in the stdlib now

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The cmpx.Compare function (and associated interface) are now available
in the standard library as cmp.Compare. Remove our version of it and use
the version from the standard library.

Updates #cleanup

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: I4be3ac63d466c05eb7a0babb25cb0d41816fbd53
This commit is contained in:
Andrew Dunham 2023-12-18 17:43:01 -05:00
parent 945cf836ee
commit a661287c4b
8 changed files with 15 additions and 51 deletions
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2
cmd/derper/depaware.txt
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@ -193,7 +193,7 @@ tailscale.com/cmd/derper dependencies: (generated by github.com/tailscale/depawa
golang.org/x/time/rate from tailscale.com/cmd/derper+
bufio from compress/flate+
bytes from bufio+
cmp from slices
cmp from slices+
compress/flate from compress/gzip+
compress/gzip from internal/profile+
container/list from crypto/tls+

4
cmd/netlogfmt/main.go
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@ -25,6 +25,7 @@
package main
import (
"cmp"
"encoding/base64"
"encoding/json"
"flag"
@ -45,7 +46,6 @@
"github.com/go-json-experiment/json/jsontext"
"tailscale.com/types/logid"
"tailscale.com/types/netlogtype"
"tailscale.com/util/cmpx"
"tailscale.com/util/must"
)
@ -155,7 +155,7 @@ func printMessage(msg message) {
slices.SortFunc(traffic, func(x, y netlogtype.ConnectionCounts) int {
nx := x.TxPackets + x.TxBytes + x.RxPackets + x.RxBytes
ny := y.TxPackets + y.TxBytes + y.RxPackets + y.RxBytes
return cmpx.Compare(ny, nx)
return cmp.Compare(ny, nx)
})
var sum netlogtype.Counts
for _, cc := range traffic {

4
cmd/tailscale/cli/exitnode.go
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@ -4,6 +4,7 @@
package cli
import (
"cmp"
"context"
"errors"
"flag"
@ -17,7 +18,6 @@
xmaps "golang.org/x/exp/maps"
"tailscale.com/ipn/ipnstate"
"tailscale.com/tailcfg"
"tailscale.com/util/cmpx"
)
var exitNodeCmd = &ffcli.Command{
@ -228,7 +228,7 @@ func filterFormatAndSortExitNodes(peers []*ipnstate.PeerStatus, filterBy string)
// by location.Priority, in order of highest priority.
func sortPeersByPriority(peers []*ipnstate.PeerStatus) {
slices.SortStableFunc(peers, func(a, b *ipnstate.PeerStatus) int {
return cmpx.Compare(b.Location.Priority, a.Location.Priority)
return cmp.Compare(b.Location.Priority, a.Location.Priority)
})
}

7
ipn/ipnlocal/local.go
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@ -4,6 +4,7 @@
package ipnlocal
import (
"cmp"
"context"
"encoding/base64"
"encoding/json"
@ -1332,7 +1333,7 @@ func (b *LocalBackend) UpdateNetmapDelta(muts []netmap.NodeMutation) (handled bo
nm.Peers = append(nm.Peers, p)
}
slices.SortFunc(nm.Peers, func(a, b tailcfg.NodeView) int {
return cmpx.Compare(a.ID(), b.ID())
return cmp.Compare(a.ID(), b.ID())
})
notify = &ipn.Notify{NetMap: nm}
} else if testenv.InTest() {
@ -1549,7 +1550,7 @@ func (b *LocalBackend) PeersForTest() []tailcfg.NodeView {
defer b.mu.Unlock()
ret := xmaps.Values(b.peers)
slices.SortFunc(ret, func(a, b tailcfg.NodeView) int {
return cmpx.Compare(a.ID(), b.ID())
return cmp.Compare(a.ID(), b.ID())
})
return ret
}
@ -4904,7 +4905,7 @@ func (b *LocalBackend) FileTargets() ([]*apitype.FileTarget, error) {
})
}
slices.SortFunc(ret, func(a, b *apitype.FileTarget) int {
return cmpx.Compare(a.Node.Name, b.Node.Name)
return cmp.Compare(a.Node.Name, b.Node.Name)
})
return ret, nil
}

4
ipn/ipnlocal/profiles.go
View File

@ -4,6 +4,7 @@
package ipnlocal
import (
"cmp"
"encoding/json"
"errors"
"fmt"
@ -17,7 +18,6 @@
"tailscale.com/ipn"
"tailscale.com/types/logger"
"tailscale.com/util/clientmetric"
"tailscale.com/util/cmpx"
)
var errAlreadyMigrated = errors.New("profile migration already completed")
@ -113,7 +113,7 @@ func (pm *profileManager) allProfiles() (out []*ipn.LoginProfile) {
}
}
slices.SortFunc(out, func(a, b *ipn.LoginProfile) int {
return cmpx.Compare(a.Name, b.Name)
return cmp.Compare(a.Name, b.Name)
})
return out
}

4
types/netmap/netmap.go
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@ -5,6 +5,7 @@
package netmap
import (
"cmp"
"encoding/json"
"fmt"
"net/netip"
@ -16,7 +17,6 @@
"tailscale.com/tka"
"tailscale.com/types/key"
"tailscale.com/types/views"
"tailscale.com/util/cmpx"
"tailscale.com/wgengine/filter"
)
@ -146,7 +146,7 @@ func (nm *NetworkMap) PeerIndexByNodeID(nodeID tailcfg.NodeID) int {
return -1
}
idx, ok := sort.Find(len(nm.Peers), func(i int) int {
return cmpx.Compare(nodeID, nm.Peers[i].ID())
return cmp.Compare(nodeID, nm.Peers[i].ID())
})
if !ok {
return -1

4
types/netmap/nodemut.go
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@ -4,6 +4,7 @@
package netmap
import (
"cmp"
"fmt"
"net/netip"
"reflect"
@ -13,7 +14,6 @@
"tailscale.com/tailcfg"
"tailscale.com/types/ptr"
"tailscale.com/util/cmpx"
)
// NodeMutation is the common interface for types that describe
@ -139,7 +139,7 @@ func MutationsFromMapResponse(res *tailcfg.MapResponse, now time.Time) (ret []No
}
}
slices.SortStableFunc(ret, func(a, b NodeMutation) int {
return cmpx.Compare(a.NodeIDBeingMutated(), b.NodeIDBeingMutated())
return cmp.Compare(a.NodeIDBeingMutated(), b.NodeIDBeingMutated())
})
return ret, true
}

37
util/cmpx/cmpx.go
View File

@ -20,40 +20,3 @@ func Or[T comparable](list ...T) T {
}
return zero
}
// Ordered is cmp.Ordered from Go 1.21.
type Ordered interface {
~int | ~int8 | ~int16 | ~int32 | ~int64 |
~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 | ~uintptr |
~float32 | ~float64 |
~string
}
// Compare returns
//
// -1 if x is less than y,
// 0 if x equals y,
// +1 if x is greater than y.
//
// For floating-point types, a NaN is considered less than any non-NaN,
// a NaN is considered equal to a NaN, and -0.0 is equal to 0.0.
func Compare[T Ordered](x, y T) int {
xNaN := isNaN(x)
yNaN := isNaN(y)
if xNaN && yNaN {
return 0
}
if xNaN || x < y {
return -1
}
if yNaN || x > y {
return +1
}
return 0
}
// isNaN reports whether x is a NaN without requiring the math package.
// This will always return false if T is not floating-point.
func isNaN[T Ordered](x T) bool {
return x != x
}