cmd/cloner: reduce diff noise when changing command

Spelling out the command to run for every type
means that changing the command makes for a large, repetitive diff.
Stop doing that.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>

cmd/cloner/cloner.go

@@ -149,7 +149,8 @@ const header = `// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserve
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Code generated by tailscale.com/cmd/cloner -type %s; DO NOT EDIT.
+// Code generated by the following command; DO NOT EDIT.
+//   tailscale.com/cmd/cloner -type %s
 
 package %s
 
@@ -178,8 +179,7 @@ func gen(buf *bytes.Buffer, imports map[string]struct{}, name string, typ *types
 		writeRegen := func(format string, args ...interface{}) {
 			fmt.Fprintf(regenBuf, format+"\n", args...)
 		}
-		writeRegen("// A compilation failure here means this code must be regenerated, with command:")
+		writeRegen("// A compilation failure here means this code must be regenerated, with the command at the top of this file.")
-		writeRegen("//   tailscale.com/cmd/cloner -type %s", *flagTypes)
 		writeRegen("var _%sNeedsRegeneration = %s(struct {", name, name)
 
 		name := typ.Obj().Name()

ipn/prefs_clone.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Code generated by tailscale.com/cmd/cloner -type Prefs; DO NOT EDIT.
+// Code generated by the following command; DO NOT EDIT.
+//   tailscale.com/cmd/cloner -type Prefs
 
 package ipn
 
@@ -30,8 +31,7 @@ func (src *Prefs) Clone() *Prefs {
 	return dst
 }
 
-// A compilation failure here means this code must be regenerated, with command:
+// A compilation failure here means this code must be regenerated, with the command at the top of this file.
-//   tailscale.com/cmd/cloner -type Prefs
 var _PrefsNeedsRegeneration = Prefs(struct {
 	ControlURL             string
 	RouteAll               bool

tailcfg/tailcfg_clone.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Code generated by tailscale.com/cmd/cloner -type User,Node,Hostinfo,NetInfo,Login,DNSConfig,RegisterResponse,DERPRegion,DERPMap,DERPNode; DO NOT EDIT.
+// Code generated by the following command; DO NOT EDIT.
+//   tailscale.com/cmd/cloner -type User,Node,Hostinfo,NetInfo,Login,DNSConfig,RegisterResponse,DERPRegion,DERPMap,DERPNode
 
 package tailcfg
 
@@ -27,8 +28,7 @@ func (src *User) Clone() *User {
 	return dst
 }
 
-// A compilation failure here means this code must be regenerated, with command:
+// A compilation failure here means this code must be regenerated, with the command at the top of this file.
-//   tailscale.com/cmd/cloner -type User,Node,Hostinfo,NetInfo,Login,DNSConfig,RegisterResponse,DERPRegion,DERPMap,DERPNode
 var _UserNeedsRegeneration = User(struct {
 	ID            UserID
 	LoginName     string
@@ -64,8 +64,7 @@ func (src *Node) Clone() *Node {
 	return dst
 }
 
-// A compilation failure here means this code must be regenerated, with command:
+// A compilation failure here means this code must be regenerated, with the command at the top of this file.
-//   tailscale.com/cmd/cloner -type User,Node,Hostinfo,NetInfo,Login,DNSConfig,RegisterResponse,DERPRegion,DERPMap,DERPNode
 var _NodeNeedsRegeneration = Node(struct {
 	ID                      NodeID
 	StableID                StableNodeID
@@ -108,8 +107,7 @@ func (src *Hostinfo) Clone() *Hostinfo {
 	return dst
 }
 
-// A compilation failure here means this code must be regenerated, with command:
+// A compilation failure here means this code must be regenerated, with the command at the top of this file.
-//   tailscale.com/cmd/cloner -type User,Node,Hostinfo,NetInfo,Login,DNSConfig,RegisterResponse,DERPRegion,DERPMap,DERPNode
 var _HostinfoNeedsRegeneration = Hostinfo(struct {
 	IPNVersion    string
 	FrontendLogID string
@@ -145,8 +143,7 @@ func (src *NetInfo) Clone() *NetInfo {
 	return dst
 }
 
-// A compilation failure here means this code must be regenerated, with command:
+// A compilation failure here means this code must be regenerated, with the command at the top of this file.
-//   tailscale.com/cmd/cloner -type User,Node,Hostinfo,NetInfo,Login,DNSConfig,RegisterResponse,DERPRegion,DERPMap,DERPNode
 var _NetInfoNeedsRegeneration = NetInfo(struct {
 	MappingVariesByDestIP opt.Bool
 	HairPinning           opt.Bool
@@ -172,8 +169,7 @@ func (src *Login) Clone() *Login {
 	return dst
 }
 
-// A compilation failure here means this code must be regenerated, with command:
+// A compilation failure here means this code must be regenerated, with the command at the top of this file.
-//   tailscale.com/cmd/cloner -type User,Node,Hostinfo,NetInfo,Login,DNSConfig,RegisterResponse,DERPRegion,DERPMap,DERPNode
 var _LoginNeedsRegeneration = Login(struct {
 	_             structs.Incomparable
 	ID            LoginID
@@ -213,8 +209,7 @@ func (src *DNSConfig) Clone() *DNSConfig {
 	return dst
 }
 
-// A compilation failure here means this code must be regenerated, with command:
+// A compilation failure here means this code must be regenerated, with the command at the top of this file.
-//   tailscale.com/cmd/cloner -type User,Node,Hostinfo,NetInfo,Login,DNSConfig,RegisterResponse,DERPRegion,DERPMap,DERPNode
 var _DNSConfigNeedsRegeneration = DNSConfig(struct {
 	Resolvers         []dnstype.Resolver
 	Routes            map[string][]dnstype.Resolver
@@ -239,8 +234,7 @@ func (src *RegisterResponse) Clone() *RegisterResponse {
 	return dst
 }
 
-// A compilation failure here means this code must be regenerated, with command:
+// A compilation failure here means this code must be regenerated, with the command at the top of this file.
-//   tailscale.com/cmd/cloner -type User,Node,Hostinfo,NetInfo,Login,DNSConfig,RegisterResponse,DERPRegion,DERPMap,DERPNode
 var _RegisterResponseNeedsRegeneration = RegisterResponse(struct {
 	User              User
 	Login             Login
@@ -264,8 +258,7 @@ func (src *DERPRegion) Clone() *DERPRegion {
 	return dst
 }
 
-// A compilation failure here means this code must be regenerated, with command:
+// A compilation failure here means this code must be regenerated, with the command at the top of this file.
-//   tailscale.com/cmd/cloner -type User,Node,Hostinfo,NetInfo,Login,DNSConfig,RegisterResponse,DERPRegion,DERPMap,DERPNode
 var _DERPRegionNeedsRegeneration = DERPRegion(struct {
 	RegionID   int
 	RegionCode string
@@ -291,8 +284,7 @@ func (src *DERPMap) Clone() *DERPMap {
 	return dst
 }
 
-// A compilation failure here means this code must be regenerated, with command:
+// A compilation failure here means this code must be regenerated, with the command at the top of this file.
-//   tailscale.com/cmd/cloner -type User,Node,Hostinfo,NetInfo,Login,DNSConfig,RegisterResponse,DERPRegion,DERPMap,DERPNode
 var _DERPMapNeedsRegeneration = DERPMap(struct {
 	Regions            map[int]*DERPRegion
 	OmitDefaultRegions bool
@@ -309,8 +301,7 @@ func (src *DERPNode) Clone() *DERPNode {
 	return dst
 }
 
-// A compilation failure here means this code must be regenerated, with command:
+// A compilation failure here means this code must be regenerated, with the command at the top of this file.
-//   tailscale.com/cmd/cloner -type User,Node,Hostinfo,NetInfo,Login,DNSConfig,RegisterResponse,DERPRegion,DERPMap,DERPNode
 var _DERPNodeNeedsRegeneration = DERPNode(struct {
 	Name             string
 	RegionID         int

types/dnstype/dnstype_clone.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Code generated by tailscale.com/cmd/cloner -type Resolver; DO NOT EDIT.
+// Code generated by the following command; DO NOT EDIT.
+//   tailscale.com/cmd/cloner -type Resolver
 
 package dnstype
 
@@ -22,8 +23,7 @@ func (src *Resolver) Clone() *Resolver {
 	return dst
 }
 
-// A compilation failure here means this code must be regenerated, with command:
+// A compilation failure here means this code must be regenerated, with the command at the top of this file.
-//   tailscale.com/cmd/cloner -type Resolver
 var _ResolverNeedsRegeneration = Resolver(struct {
 	Addr                string
 	BootstrapResolution []netaddr.IP

types/persist/persist_clone.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Code generated by tailscale.com/cmd/cloner -type Persist; DO NOT EDIT.
+// Code generated by the following command; DO NOT EDIT.
+//   tailscale.com/cmd/cloner -type Persist
 
 package persist
 
@@ -23,8 +24,7 @@ func (src *Persist) Clone() *Persist {
 	return dst
 }
 
-// A compilation failure here means this code must be regenerated, with command:
+// A compilation failure here means this code must be regenerated, with the command at the top of this file.
-//   tailscale.com/cmd/cloner -type Persist
 var _PersistNeedsRegeneration = Persist(struct {
 	_                               structs.Incomparable
 	LegacyFrontendPrivateMachineKey key.MachinePrivate

wgengine/filter/match_clone.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Code generated by tailscale.com/cmd/cloner -type Match; DO NOT EDIT.
+// Code generated by the following command; DO NOT EDIT.
+//   tailscale.com/cmd/cloner -type Match
 
 package filter
 
@@ -25,8 +26,7 @@ func (src *Match) Clone() *Match {
 	return dst
 }
 
-// A compilation failure here means this code must be regenerated, with command:
+// A compilation failure here means this code must be regenerated, with the command at the top of this file.
-//   tailscale.com/cmd/cloner -type Match
 var _MatchNeedsRegeneration = Match(struct {
 	IPProto []ipproto.Proto
 	Dsts    []NetPortRange

wgengine/wgcfg/clone.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Code generated by tailscale.com/cmd/cloner -type Config,Peer; DO NOT EDIT.
+// Code generated by the following command; DO NOT EDIT.
+//   tailscale.com/cmd/cloner -type Config,Peer
 
 package wgcfg
 
@@ -29,8 +30,7 @@ func (src *Config) Clone() *Config {
 	return dst
 }
 
-// A compilation failure here means this code must be regenerated, with command:
+// A compilation failure here means this code must be regenerated, with the command at the top of this file.
-//   tailscale.com/cmd/cloner -type Config,Peer
 var _ConfigNeedsRegeneration = Config(struct {
 	Name       string
 	PrivateKey wgkey.Private
@@ -52,8 +52,7 @@ func (src *Peer) Clone() *Peer {
 	return dst
 }
 
-// A compilation failure here means this code must be regenerated, with command:
+// A compilation failure here means this code must be regenerated, with the command at the top of this file.
-//   tailscale.com/cmd/cloner -type Config,Peer
 var _PeerNeedsRegeneration = Peer(struct {
 	PublicKey           wgkey.Key
 	DiscoKey            tailcfg.DiscoKey