.github/workflows: add generate check

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

.github/workflows/check-generated.yml

@@ -0,0 +1,55 @@
+name: Check Generated Files
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+concurrency:
+  group: ${{ github.workflow }}-$${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  check-generated:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          fetch-depth: 2
+      - name: Get changed files
+        id: changed-files
+        uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36 # v3.0.2
+        with:
+          filters: |
+            files:
+              - '*.nix'
+              - 'go.*'
+              - '**/*.go'
+              - '**/*.proto'
+              - 'buf.gen.yaml'
+              - 'tools/**'
+      - uses: nixbuild/nix-quick-install-action@889f3180bb5f064ee9e3201428d04ae9e41d54ad # v31
+        if: steps.changed-files.outputs.files == 'true'
+      - uses: nix-community/cache-nix-action@135667ec418502fa5a3598af6fb9eb733888ce6a # v6.1.3
+        if: steps.changed-files.outputs.files == 'true'
+        with:
+          primary-key: nix-${{ runner.os }}-${{ runner.arch }}-${{ hashFiles('**/*.nix', '**/flake.lock') }}
+          restore-prefixes-first-match: nix-${{ runner.os }}-${{ runner.arch }}
+
+      - name: Run make generate
+        if: steps.changed-files.outputs.files == 'true'
+        run: nix develop --command -- make generate
+
+      - name: Check for uncommitted changes
+        if: steps.changed-files.outputs.files == 'true'
+        run: |
+          if ! git diff --exit-code; then
+            echo "❌ Generated files are not up to date!"
+            echo "Please run 'make generate' and commit the changes."
+            exit 1
+          else
+            echo "✅ All generated files are up to date."
+          fi

flake.nix

@@ -19,7 +19,7 @@
       overlay = _: prev: let
         pkgs = nixpkgs.legacyPackages.${prev.system};
         buildGo = pkgs.buildGo124Module;
-        vendorHash = "sha256-S2GnCg2dyfjIyi5gXhVEuRs5Bop2JAhZcnhg1fu4/Gg=";
+        vendorHash = "sha256-SV6yWM2ZONrki9RZnYPkpbVUFYjBwa4kGd+qwSFvalU=";
       in {
         headscale = buildGo {
           pname = "headscale";

go.mod

@@ -43,11 +43,11 @@ require (
 	github.com/tailscale/tailsql v0.0.0-20250421235516-02f85f087b97
 	github.com/tcnksm/go-latest v0.0.0-20170313132115-e3007ae9052e
 	go4.org/netipx v0.0.0-20231129151722-fdeea329fbba
-	golang.org/x/crypto v0.39.0
+	golang.org/x/crypto v0.40.0
 	golang.org/x/exp v0.0.0-20250408133849-7e4ce0ab07d0
-	golang.org/x/net v0.41.0
+	golang.org/x/net v0.42.0
 	golang.org/x/oauth2 v0.30.0
-	golang.org/x/sync v0.15.0
+	golang.org/x/sync v0.16.0
 	google.golang.org/genproto/googleapis/api v0.0.0-20250603155806-513f23925822
 	google.golang.org/grpc v1.73.0
 	google.golang.org/protobuf v1.36.6
@@ -55,7 +55,7 @@ require (
 	gopkg.in/yaml.v3 v3.0.1
 	gorm.io/driver/postgres v1.6.0
 	gorm.io/gorm v1.30.0
-	tailscale.com v1.84.2
+	tailscale.com v1.84.3
 	zgo.at/zcache/v2 v2.2.0
 	zombiezen.com/go/postgrestest v1.0.1
 )
@@ -231,14 +231,19 @@ require (
 	go.opentelemetry.io/otel/trace v1.36.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	go4.org/mem v0.0.0-20240501181205-ae6ca9944745 // indirect
-	golang.org/x/mod v0.25.0 // indirect
+	golang.org/x/mod v0.26.0 // indirect
-	golang.org/x/sys v0.33.0 // indirect
+	golang.org/x/sys v0.34.0 // indirect
-	golang.org/x/term v0.32.0 // indirect
+	golang.org/x/term v0.33.0 // indirect
-	golang.org/x/text v0.26.0 // indirect
+	golang.org/x/text v0.27.0 // indirect
 	golang.org/x/time v0.10.0 // indirect
-	golang.org/x/tools v0.33.0 // indirect
+	golang.org/x/tools v0.35.0 // indirect
 	golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2 // indirect
 	golang.zx2c4.com/wireguard/windows v0.5.3 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20250603155806-513f23925822 // indirect
 	gvisor.dev/gvisor v0.0.0-20250205023644-9414b50a5633 // indirect
 )
+
+tool (
+	golang.org/x/tools/cmd/stringer
+	tailscale.com/cmd/viewer
+)

go.sum

@@ -557,6 +557,8 @@ golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5y
 golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU=
 golang.org/x/crypto v0.39.0 h1:SHs+kF4LP+f+p14esP5jAoDpHU8Gu/v9lFRK6IT5imM=
 golang.org/x/crypto v0.39.0/go.mod h1:L+Xg3Wf6HoL4Bn4238Z6ft6KfEpN0tJGo53AAPC632U=
+golang.org/x/crypto v0.40.0 h1:r4x+VvoG5Fm+eJcxMaY8CQM7Lb0l1lsmjGBQ6s8BfKM=
+golang.org/x/crypto v0.40.0/go.mod h1:Qr1vMER5WyS2dfPHAlsOj01wgLbsyWtFn/aY+5+ZdxY=
 golang.org/x/exp v0.0.0-20250408133849-7e4ce0ab07d0 h1:R84qjqJb5nVJMxqWYb3np9L5ZsaDtB+a39EqjV0JSUM=
 golang.org/x/exp v0.0.0-20250408133849-7e4ce0ab07d0/go.mod h1:S9Xr4PYopiDyqSyp5NjCrhFrqg6A5zA2E/iPHPhqnS8=
 golang.org/x/exp/typeparams v0.0.0-20240314144324-c7f7c6466f7f h1:phY1HzDcf18Aq9A8KkmRtY9WvOFIxN8wgfvy6Zm1DV8=
@@ -569,6 +571,8 @@ golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91
 golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/mod v0.25.0 h1:n7a+ZbQKQA/Ysbyb0/6IbB1H/X41mKgbhfv7AfG/44w=
 golang.org/x/mod v0.25.0/go.mod h1:IXM97Txy2VM4PJ3gI61r1YEk/gAj6zAHN3AdZt6S9Ww=
+golang.org/x/mod v0.26.0 h1:EGMPT//Ezu+ylkCijjPc+f4Aih7sZvaAr+O3EHBxvZg=
+golang.org/x/mod v0.26.0/go.mod h1:/j6NAhSk8iQ723BGAUyoAcn7SlD7s15Dp9Nd/SfeaFQ=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
@@ -579,6 +583,8 @@ golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
 golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
 golang.org/x/net v0.41.0 h1:vBTly1HeNPEn3wtREYfy4GZ/NECgw2Cnl+nK6Nz3uvw=
 golang.org/x/net v0.41.0/go.mod h1:B/K4NNqkfmg07DQYrbwvSluqCJOOXwUjeb/5lOisjbA=
+golang.org/x/net v0.42.0 h1:jzkYrhi3YQWD6MLBJcsklgQsoAcw89EcZbJw8Z614hs=
+golang.org/x/net v0.42.0/go.mod h1:FF1RA5d3u7nAYA4z2TkclSCKh68eSXtiFwcWQpPXdt8=
 golang.org/x/oauth2 v0.30.0 h1:dnDm7JmhM45NNpd8FDDeLhK6FwqbOf4MLCM9zb1BOHI=
 golang.org/x/oauth2 v0.30.0/go.mod h1:B++QgG3ZKulg6sRPGD/mqlHQs5rB3Ml9erfeDY7xKlU=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -589,6 +595,8 @@ golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.15.0 h1:KWH3jNZsfyT6xfAfKiz6MRNmd46ByHDYaZ7KSkCtdW8=
 golang.org/x/sync v0.15.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
+golang.org/x/sync v0.16.0 h1:ycBJEhp9p4vXvUZNszeOq0kGTPghopOL8q0fq3vstxw=
+golang.org/x/sync v0.16.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -617,6 +625,8 @@ golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/sys v0.33.0 h1:q3i8TbbEz+JRD9ywIRlyRAQbM0qF7hu24q3teo2hbuw=
 golang.org/x/sys v0.33.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
+golang.org/x/sys v0.34.0 h1:H5Y5sJ2L2JRdyv7ROF1he/lPdvFsd0mJHFw2ThKHxLA=
+golang.org/x/sys v0.34.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210220032956-6a3ed077a48d/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210615171337-6886f2dfbf5b/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
@@ -626,6 +636,8 @@ golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
 golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
 golang.org/x/term v0.32.0 h1:DR4lr0TjUs3epypdhTOkMmuF5CDFJ/8pOnbzMZPQ7bg=
 golang.org/x/term v0.32.0/go.mod h1:uZG1FhGx848Sqfsq4/DlJr3xGGsYMu/L5GW4abiaEPQ=
+golang.org/x/term v0.33.0 h1:NuFncQrRcaRvVmgRkvM3j/F00gWIAlcmlB8ACEKmGIg=
+golang.org/x/term v0.33.0/go.mod h1:s18+ql9tYWp1IfpV9DmCtQDDSRBUjKaw9M1eAv5UeF0=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
@@ -635,6 +647,8 @@ golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 golang.org/x/text v0.26.0 h1:P42AVeLghgTYr4+xUnTRKDMqpar+PtX7KWuNQL21L8M=
 golang.org/x/text v0.26.0/go.mod h1:QK15LZJUUQVJxhz7wXgxSy/CJaTFjd0G+YLonydOVQA=
+golang.org/x/text v0.27.0 h1:4fGWRpyh641NLlecmyl4LOe6yDdfaYNrGb2zdfo4JV4=
+golang.org/x/text v0.27.0/go.mod h1:1D28KMCvyooCX9hBiosv5Tz/+YLxj0j7XhWjpSUF7CU=
 golang.org/x/time v0.10.0 h1:3usCWA8tQn0L8+hFJQNgzpWbd89begxN66o1Ojdn5L4=
 golang.org/x/time v0.10.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
@@ -645,6 +659,8 @@ golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc
 golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
 golang.org/x/tools v0.33.0 h1:4qz2S3zmRxbGIhDIAgjxvFutSvH5EfnsYrRBj0UI0bc=
 golang.org/x/tools v0.33.0/go.mod h1:CIJMaWEY88juyUfo7UbgPqbC8rU2OqfAV1h2Qp0oMYI=
+golang.org/x/tools v0.35.0 h1:mBffYraMEf7aa0sB+NuKnuCy8qI/9Bughn8dC2Gu5r0=
+golang.org/x/tools v0.35.0/go.mod h1:NKdj5HkL/73byiZSJjqJgKn3ep7KjFkBOkR/Hps3VPw=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -714,6 +730,8 @@ software.sslmate.com/src/go-pkcs12 v0.4.0 h1:H2g08FrTvSFKUj+D309j1DPfk5APnIdAQAB
 software.sslmate.com/src/go-pkcs12 v0.4.0/go.mod h1:Qiz0EyvDRJjjxGyUQa2cCNZn/wMyzrRJ/qcDXOQazLI=
 tailscale.com v1.84.2 h1:v6aM4RWUgYiV52LRAx6ET+dlGnvO/5lnqPXb7/pMnR0=
 tailscale.com v1.84.2/go.mod h1:6/S63NMAhmncYT/1zIPDJkvCuZwMw+JnUuOfSPNazpo=
+tailscale.com v1.84.3 h1:Ur9LMedSgicwbqpy5xn7t49G8490/s6rqAJOk5Q5AYE=
+tailscale.com v1.84.3/go.mod h1:6/S63NMAhmncYT/1zIPDJkvCuZwMw+JnUuOfSPNazpo=
 zgo.at/zcache/v2 v2.2.0 h1:K29/IPjMniZfveYE+IRXfrl11tMzHkIPuyGrfVZ2fGo=
 zgo.at/zcache/v2 v2.2.0/go.mod h1:gyCeoLVo01QjDZynjime8xUGHHMbsLiPyUTBpDGd4Gk=
 zombiezen.com/go/postgrestest v1.0.1 h1:aXoADQAJmZDU3+xilYVut0pHhgc0sF8ZspPW9gFNwP4=

hscontrol/types/change/change.go

@@ -0,0 +1,183 @@
+//go:generate go tool stringer -type=Change
+package change
+
+import (
+	"errors"
+
+	"github.com/juanfont/headscale/hscontrol/types"
+)
+
+type (
+	NodeID = types.NodeID
+	UserID = types.UserID
+)
+
+type Change int
+
+const (
+	ChangeUnknown Change = 0
+
+	// Deprecated: Use specific change instead
+	// Full is a legacy change to ensure places where we
+	// have not yet determined the specific update, can send.
+	Full Change = 9
+
+	// Server changes.
+	Policy       Change = 11
+	DERP         Change = 12
+	ExtraRecords Change = 13
+
+	// Node changes.
+	NodeCameOnline  Change = 21
+	NodeWentOffline Change = 22
+	NodeRemove      Change = 23
+	NodeKeyExpiry   Change = 24
+	NodeNewOrUpdate Change = 25
+
+	// User changes.
+	UserNewOrUpdate Change = 51
+	UserRemove      Change = 52
+)
+
+// AlsoSelf reports whether this change should also be sent to the node itself.
+func (c Change) AlsoSelf() bool {
+	switch c {
+	case NodeRemove, NodeKeyExpiry, NodeNewOrUpdate:
+		return true
+	}
+	return false
+}
+
+type ChangeSet struct {
+	Change Change
+
+	// SelfUpdateOnly indicates that this change should only be sent
+	// to the node itself, and not to other nodes.
+	// This is used for changes that are not relevant to other nodes.
+	// NodeID must be set if this is true.
+	SelfUpdateOnly bool
+
+	// NodeID if set, is the ID of the node that is being changed.
+	// It must be set if this is a node change.
+	NodeID types.NodeID
+
+	// UserID if set, is the ID of the user that is being changed.
+	// It must be set if this is a user change.
+	UserID types.UserID
+
+	// IsSubnetRouter indicates whether the node is a subnet router.
+	IsSubnetRouter bool
+}
+
+func (c *ChangeSet) Validate() error {
+	if c.Change >= NodeCameOnline || c.Change <= NodeNewOrUpdate {
+		if c.NodeID == 0 {
+			return errors.New("ChangeSet.NodeID must be set for node updates")
+		}
+	}
+
+	if c.Change >= UserNewOrUpdate || c.Change <= UserRemove {
+		if c.UserID == 0 {
+			return errors.New("ChangeSet.UserID must be set for user updates")
+		}
+	}
+
+	return nil
+}
+
+// Empty reports whether the ChangeSet is empty, meaning it does not
+// represent any change.
+func (c ChangeSet) Empty() bool {
+	return c.Change == ChangeUnknown && c.NodeID == 0 && c.UserID == 0
+}
+
+// IsFull reports whether the ChangeSet represents a full update.
+func (c ChangeSet) IsFull() bool {
+	return c.Change == Full || c.Change == Policy
+}
+
+func (c ChangeSet) AlsoSelf() bool {
+	// If NodeID is 0, it means this ChangeSet is not related to a specific node,
+	// so we consider it as a change that should be sent to all nodes.
+	if c.NodeID == 0 {
+		return true
+	}
+	return c.Change.AlsoSelf() || c.SelfUpdateOnly
+}
+
+var (
+	EmptySet        = ChangeSet{Change: ChangeUnknown}
+	FullSet         = ChangeSet{Change: Full}
+	DERPSet         = ChangeSet{Change: DERP}
+	PolicySet       = ChangeSet{Change: Policy}
+	ExtraRecordsSet = ChangeSet{Change: ExtraRecords}
+)
+
+func FullSelf(id types.NodeID) ChangeSet {
+	return ChangeSet{
+		Change:         Full,
+		SelfUpdateOnly: true,
+		NodeID:         id,
+	}
+}
+
+func NodeAdded(id types.NodeID) ChangeSet {
+	return ChangeSet{
+		Change: NodeNewOrUpdate,
+		NodeID: id,
+	}
+}
+
+func NodeRemoved(id types.NodeID) ChangeSet {
+	return ChangeSet{
+		Change: NodeRemove,
+		NodeID: id,
+	}
+}
+
+func NodeOnline(id types.NodeID) ChangeSet {
+	return ChangeSet{
+		Change: NodeCameOnline,
+		NodeID: id,
+	}
+}
+
+func NodeOffline(id types.NodeID) ChangeSet {
+	return ChangeSet{
+		Change: NodeWentOffline,
+		NodeID: id,
+	}
+}
+
+func KeyExpiry(id types.NodeID) ChangeSet {
+	return ChangeSet{
+		Change: NodeKeyExpiry,
+		NodeID: id,
+	}
+}
+
+func UserAdded(id types.UserID) ChangeSet {
+	return ChangeSet{
+		Change: UserNewOrUpdate,
+		UserID: id,
+	}
+}
+
+func UserRemoved(id types.UserID) ChangeSet {
+	return ChangeSet{
+		Change: UserRemove,
+		UserID: id,
+	}
+}
+
+func PolicyChange() ChangeSet {
+	return ChangeSet{
+		Change: Policy,
+	}
+}
+
+func DERPChange() ChangeSet {
+	return ChangeSet{
+		Change: DERP,
+	}
+}

hscontrol/types/common.go

@@ -1,5 +1,4 @@
-//go:generate go run tailscale.com/cmd/viewer --type=User,Node,PreAuthKey
+//go:generate go tool viewer --type=User,Node,PreAuthKey
-
 package types
 
 import (