[CLI] implement forgejo-cli actions register

cmd/forgejo/actions.go

@@ -5,7 +5,11 @@ package forgejo
 
 import (
 	"context"
+	"encoding/hex"
 	"fmt"
+	"io"
+	"os"
+	"strings"
 
 	actions_model "code.gitea.io/gitea/models/actions"
 	"code.gitea.io/gitea/modules/private"
@@ -21,6 +25,7 @@ func CmdActions(ctx context.Context) cli.Command {
 		Subcommands: []cli.Command{
 			SubcmdActionsGenerateRunnerToken(ctx),
 			SubcmdActionsGenerateRunnerSecret(ctx),
+			SubcmdActionsRegister(ctx),
 		},
 	}
 }
@@ -48,6 +53,129 @@ func SubcmdActionsGenerateRunnerSecret(ctx context.Context) cli.Command {
 	}
 }
 
+func SubcmdActionsRegister(ctx context.Context) cli.Command {
+	return cli.Command{
+		Name:   "register",
+		Usage:  "Idempotent registration of a runner using a shared secret",
+		Action: func(cliCtx *cli.Context) error { return RunRegister(ctx, cliCtx) },
+		Flags: []cli.Flag{
+			cli.StringFlag{
+				Name:  "secret",
+				Usage: "the secret the runner will use to connect as a 40 character hexadecimal string",
+			},
+			cli.StringFlag{
+				Name:  "secret-stdin",
+				Usage: "the secret the runner will use to connect as a 40 character hexadecimal string, read from stdin",
+			},
+			cli.StringFlag{
+				Name:  "secret-file",
+				Usage: "path to the file containing the secret the runner will use to connect as a 40 character hexadecimal string",
+			},
+			cli.StringFlag{
+				Name:  "scope, s",
+				Value: "",
+				Usage: "{owner}[/{repo}] - leave empty for a global runner",
+			},
+			cli.StringFlag{
+				Name:  "labels",
+				Value: "",
+				Usage: "comma separated list of labels supported by the runner (e.g. docker,ubuntu-latest,self-hosted)  (not required since v1.21)",
+			},
+			cli.StringFlag{
+				Name:  "name",
+				Value: "runner",
+				Usage: "name of the runner (default runner)",
+			},
+			cli.StringFlag{
+				Name:  "version",
+				Value: "",
+				Usage: "version of the runner (not required since v1.21)",
+			},
+		},
+	}
+}
+
+func readSecret(ctx context.Context, cliCtx *cli.Context) (string, error) {
+	if cliCtx.IsSet("secret") {
+		return cliCtx.String("secret"), nil
+	}
+	if cliCtx.IsSet("secret-stdin") {
+		buf, err := io.ReadAll(ContextGetStdin(ctx))
+		if err != nil {
+			return "", err
+		}
+		return string(buf), nil
+	}
+	if cliCtx.IsSet("secret-file") {
+		path := cliCtx.String("secret-file")
+		buf, err := os.ReadFile(path)
+		if err != nil {
+			return "", err
+		}
+		return string(buf), nil
+	}
+	return "", fmt.Errorf("at least one of the --secret, --secret-stdin, --secret-file options is required")
+}
+
+func validateSecret(secret string) error {
+	secretLen := len(secret)
+	if secretLen != 40 {
+		return fmt.Errorf("the secret must be exactly 40 characters long, not %d: generate-secret can provide a secret matching the requirements", secretLen)
+	}
+	if _, err := hex.DecodeString(secret); err != nil {
+		return fmt.Errorf("the secret must be an hexadecimal string: %w", err)
+	}
+	return nil
+}
+
+func RunRegister(ctx context.Context, cliCtx *cli.Context) error {
+	if !ContextGetNoInstallSignals(ctx) {
+		var cancel context.CancelFunc
+		ctx, cancel = installSignals(ctx)
+		defer cancel()
+	}
+	setting.MustInstalled()
+
+	secret, err := readSecret(ctx, cliCtx)
+	if err != nil {
+		return err
+	}
+	if err := validateSecret(secret); err != nil {
+		return err
+	}
+	scope := cliCtx.String("scope")
+	labels := cliCtx.String("labels")
+	name := cliCtx.String("name")
+	version := cliCtx.String("version")
+
+	//
+	// There are two kinds of tokens
+	//
+	// - "registration token" only used when a runner interacts to
+	//   register
+	//
+	// - "token" obtained after a successful registration and stored by
+	//   the runner to authenticate
+	//
+	// The register subcommand does not need a "registration token", it
+	// needs a "token". Using the same name is confusing and secret is
+	// preferred for this reason in the cli.
+	//
+	// The ActionsRunnerRegister argument is token to be consistent with
+	// the internal naming. It is still confusing to the developer but
+	// not to the user.
+	//
+	respText, extra := private.ActionsRunnerRegister(ctx, secret, scope, strings.Split(labels, ","), name, version)
+	if extra.HasError() {
+		return handleCliResponseExtra(ctx, extra)
+	}
+
+	if _, err := fmt.Fprintf(ContextGetStdout(ctx), "%s", respText); err != nil {
+		panic(err)
+	}
+	return nil
+}
+
 func RunGenerateSecret(ctx context.Context, cliCtx *cli.Context) error {
 	setting.MustInstalled()
 
@@ -74,7 +202,7 @@ func RunGenerateActionsRunnerToken(ctx context.Context, cliCtx *cli.Context) err
 
 	respText, extra := private.GenerateActionsRunnerToken(ctx, scope)
 	if extra.HasError() {
-		return handleCliResponseExtra(extra)
+		return handleCliResponseExtra(ctx, extra)
 	}
 	if _, err := fmt.Fprintf(ContextGetStdout(ctx), "%s", respText); err != nil {
 		panic(err)

models/actions/forgejo.go

@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: MIT
+
+package actions
+
+import (
+	"context"
+	"encoding/hex"
+	"fmt"
+
+	auth_model "code.gitea.io/gitea/models/auth"
+	"code.gitea.io/gitea/models/db"
+	"code.gitea.io/gitea/modules/util"
+
+	gouuid "github.com/google/uuid"
+)
+
+func RegisterRunner(ctx context.Context, ownerID, repoID int64, token string, labels []string, name, version string) (*ActionRunner, error) {
+	uuid, err := gouuid.FromBytes([]byte(token[:16]))
+	if err != nil {
+		return nil, fmt.Errorf("gouuid.FromBytes %v", err)
+	}
+	uuidString := uuid.String()
+
+	var runner ActionRunner
+
+	has, err := db.GetEngine(ctx).Where("uuid=?", uuidString).Get(&runner)
+	if err != nil {
+		return nil, fmt.Errorf("GetRunner %v", err)
+	} else if !has {
+		//
+		// The runner does not exist yet, create it
+		//
+		saltBytes, err := util.CryptoRandomBytes(16)
+		if err != nil {
+			return nil, fmt.Errorf("CryptoRandomBytes %v", err)
+		}
+		salt := hex.EncodeToString(saltBytes)
+
+		hash := auth_model.HashToken(token, salt)
+
+		runner = ActionRunner{
+			UUID:      uuidString,
+			TokenHash: hash,
+			TokenSalt: salt,
+		}
+
+		if err := CreateRunner(ctx, &runner); err != nil {
+			return &runner, fmt.Errorf("can't create new runner %w", err)
+		}
+	}
+
+	//
+	// Update the existing runner
+	//
+	name, _ = util.SplitStringAtByteN(name, 255)
+
+	runner.Name = name
+	runner.OwnerID = ownerID
+	runner.RepoID = repoID
+	runner.Version = version
+	runner.AgentLabels = labels
+
+	if err := UpdateRunner(ctx, &runner, "name", "owner_id", "repo_id", "version", "agent_labels"); err != nil {
+		return &runner, fmt.Errorf("can't update the runner %+v %w", runner, err)
+	}
+
+	return &runner, nil
+}

models/actions/forgejo_test.go

@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: MIT
+
+package actions
+
+import (
+	"crypto/subtle"
+	"testing"
+
+	auth_model "code.gitea.io/gitea/models/auth"
+	"code.gitea.io/gitea/models/db"
+	"code.gitea.io/gitea/models/unittest"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestActions_RegisterRunner(t *testing.T) {
+	assert.NoError(t, unittest.PrepareTestDatabase())
+	ownerID := int64(0)
+	repoID := int64(0)
+	token := "0123456789012345678901234567890123456789"
+	labels := []string{}
+	name := "runner"
+	version := "v1.2.3"
+	runner, err := RegisterRunner(db.DefaultContext, ownerID, repoID, token, labels, name, version)
+	assert.NoError(t, err)
+	assert.EqualValues(t, name, runner.Name)
+
+	assert.EqualValues(t, 1, subtle.ConstantTimeCompare([]byte(runner.TokenHash), []byte(auth_model.HashToken(token, runner.TokenSalt))), "the token cannot be verified with the same method as routers/api/actions/runner/interceptor.go as of 8228751c55d6a4263f0fec2932ca16181c09c97d")
+}

models/actions/main_test.go

@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: MIT
+
+package actions_test
+
+import (
+	"path/filepath"
+	"testing"
+
+	"code.gitea.io/gitea/models/unittest"
+
+	_ "code.gitea.io/gitea/models"
+)
+
+func TestMain(m *testing.M) {
+	unittest.MainTest(m, &unittest.TestOptions{
+		GiteaRootPath: filepath.Join("..", ".."),
+	})
+}

modules/private/forgejo_actions.go

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: MIT
+
+package private
+
+import (
+	"context"
+
+	"code.gitea.io/gitea/modules/setting"
+)
+
+type ActionsRunnerRegisterRequest struct {
+	Token   string
+	Scope   string
+	Labels  []string
+	Name    string
+	Version string
+}
+
+func ActionsRunnerRegister(ctx context.Context, token, scope string, labels []string, name, version string) (string, ResponseExtra) {
+	reqURL := setting.LocalURL + "api/internal/actions/register"
+
+	req := newInternalRequest(ctx, reqURL, "POST", ActionsRunnerRegisterRequest{
+		Token:   token,
+		Scope:   scope,
+		Labels:  labels,
+		Name:    name,
+		Version: version,
+	})
+
+	resp, extra := requestJSONResp(req, &responseText{})
+	return resp.Text, extra
+}

routers/private/forgejo.go

@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: MIT
+
+package private
+
+import (
+	"fmt"
+	"net/http"
+
+	actions_model "code.gitea.io/gitea/models/actions"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/json"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/private"
+)
+
+func ActionsRunnerRegister(ctx *context.PrivateContext) {
+	var registerRequest private.ActionsRunnerRegisterRequest
+	rd := ctx.Req.Body
+	defer rd.Close()
+
+	if err := json.NewDecoder(rd).Decode(&registerRequest); err != nil {
+		log.Error("%v", err)
+		ctx.JSON(http.StatusInternalServerError, private.Response{
+			Err: err.Error(),
+		})
+		return
+	}
+
+	owner, repo, err := parseScope(ctx, registerRequest.Scope)
+	if err != nil {
+		log.Error("%v", err)
+		ctx.JSON(http.StatusInternalServerError, private.Response{
+			Err: err.Error(),
+		})
+	}
+
+	runner, err := actions_model.RegisterRunner(ctx, owner, repo, registerRequest.Token, registerRequest.Labels, registerRequest.Name, registerRequest.Version)
+	if err != nil {
+		err := fmt.Sprintf("error while registering runner: %v", err)
+		log.Error("%v", err)
+		ctx.JSON(http.StatusInternalServerError, private.Response{
+			Err: err,
+		})
+		return
+	}
+
+	ctx.PlainText(http.StatusOK, runner.UUID)
+}

routers/private/internal.go

@@ -56,6 +56,7 @@ func Routes() *web.Route {
 	// Since internal API will be sent only from Gitea sub commands and it's under control (checked by InternalToken), we can trust the headers.
 	r.Use(chi_middleware.RealIP)
 
+	r.Post("/actions/register", ActionsRunnerRegister)
 	r.Post("/ssh/authorized_keys", AuthorizedPublicKeyByContent)
 	r.Post("/ssh/{id}/update/{repoid}", UpdatePublicKeyInRepo)
 	r.Post("/ssh/log", bind(private.SSHLogOption{}), SSHLog)

tests/integration/cmd_forgejo_actions_test.go

@@ -3,9 +3,16 @@
 package integration
 
 import (
+	gocontext "context"
 	"net/url"
+	"os"
+	"strings"
 	"testing"
 
+	actions_model "code.gitea.io/gitea/models/actions"
+	repo_model "code.gitea.io/gitea/models/repo"
+	"code.gitea.io/gitea/models/unittest"
+	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/test"
 
@@ -16,12 +23,191 @@ func Test_CmdForgejo_Actions(t *testing.T) {
 	onGiteaRun(t, func(*testing.T, *url.URL) {
 		defer test.MockVariable(&setting.Actions.Enabled, true)()
 
-		var output string
+		token, err := cmdForgejoCaptureOutput(t, []string{"forgejo-cli", "actions", "generate-runner-token"})
+		assert.NoError(t, err)
+		assert.EqualValues(t, 40, len(token))
 
-		output = cmdForgejoCaptureOutput(t, []string{"forgejo-cli", "actions", "generate-runner-token"})
+		secret, err := cmdForgejoCaptureOutput(t, []string{"forgejo-cli", "actions", "generate-secret"})
-		assert.EqualValues(t, 40, len(output))
+		assert.NoError(t, err)
+		assert.EqualValues(t, 40, len(secret))
 
-		output = cmdForgejoCaptureOutput(t, []string{"forgejo-cli", "actions", "generate-secret"})
+		_, err = cmdForgejoCaptureOutput(t, []string{"forgejo-cli", "actions", "register"})
-		assert.EqualValues(t, 40, len(output))
+		assert.ErrorContains(t, err, "at least one of the --secret")
+
+		for _, testCase := range []struct {
+			testName     string
+			scope        string
+			secret       string
+			errorMessage string
+		}{
+			{
+				testName:     "bad user",
+				scope:        "baduser",
+				secret:       "0123456789012345678901234567890123456789",
+				errorMessage: "user does not exist",
+			},
+			{
+				testName:     "bad repo",
+				scope:        "org25/badrepo",
+				secret:       "0123456789012345678901234567890123456789",
+				errorMessage: "repository does not exist",
+			},
+			{
+				testName:     "secret length != 40",
+				scope:        "org25",
+				secret:       "0123456789",
+				errorMessage: "40 characters long",
+			},
+			{
+				testName:     "secret is not a hexadecimal string",
+				scope:        "org25",
+				secret:       "ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ",
+				errorMessage: "must be an hexadecimal string",
+			},
+		} {
+			t.Run(testCase.testName, func(t *testing.T) {
+				cmd := []string{"forgejo-cli", "actions", "register", "--secret", testCase.secret, "--scope", testCase.scope}
+				output, err := cmdForgejoCaptureOutput(t, cmd)
+				assert.ErrorContains(t, err, testCase.errorMessage)
+				assert.EqualValues(t, "", output)
+			})
+		}
+
+		secret = "DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD"
+		expecteduuid := "44444444-4444-4444-4444-444444444444"
+
+		for _, testCase := range []struct {
+			testName     string
+			secretOption func() string
+			stdin        []string
+		}{
+			{
+				testName: "secret from argument",
+				secretOption: func() string {
+					return "--secret=" + secret
+				},
+			},
+			{
+				testName: "secret from stdin",
+				secretOption: func() string {
+					return "--secret-stdin"
+				},
+				stdin: []string{secret},
+			},
+			{
+				testName: "secret from file",
+				secretOption: func() string {
+					secretFile := t.TempDir() + "/secret"
+					assert.NoError(t, os.WriteFile(secretFile, []byte(secret), 0o644))
+					return "--secret-file=" + secretFile
+				},
+			},
+		} {
+			t.Run(testCase.testName, func(t *testing.T) {
+				cmd := []string{"forgejo-cli", "actions", "register", testCase.secretOption(), "--scope=org26"}
+				uuid, err := cmdForgejoCaptureOutput(t, cmd, testCase.stdin...)
+				assert.NoError(t, err)
+				assert.EqualValues(t, expecteduuid, uuid)
+			})
+		}
+
+		secret = "0123456789012345678901234567890123456789"
+		expecteduuid = "30313233-3435-3637-3839-303132333435"
+
+		for _, testCase := range []struct {
+			testName string
+			scope    string
+			secret   string
+			name     string
+			labels   string
+			version  string
+			uuid     string
+		}{
+			{
+				testName: "org",
+				scope:    "org25",
+				secret:   "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA",
+				uuid:     "41414141-4141-4141-4141-414141414141",
+			},
+			{
+				testName: "user and repo",
+				scope:    "user2/repo2",
+				secret:   "BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB",
+				uuid:     "42424242-4242-4242-4242-424242424242",
+			},
+			{
+				testName: "labels",
+				scope:    "org25",
+				name:     "runnerName",
+				labels:   "label1,label2,label3",
+				version:  "v1.2.3",
+				secret:   "CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC",
+				uuid:     "43434343-4343-4343-4343-434343434343",
+			},
+			{
+				testName: "insert a runner",
+				scope:    "user3/repo5",
+				name:     "runnerName",
+				labels:   "label1,label2,label3",
+				version:  "v1.2.3",
+				secret:   secret,
+				uuid:     expecteduuid,
+			},
+			{
+				testName: "update an existing runner",
+				scope:    "user5/repo4",
+				name:     "runnerNameChanged",
+				labels:   "label1,label2,label3,more,label",
+				version:  "v1.2.3-suffix",
+				secret:   secret,
+				uuid:     expecteduuid,
+			},
+		} {
+			t.Run(testCase.testName, func(t *testing.T) {
+				cmd := []string{
+					"forgejo-cli", "actions", "register",
+					"--secret", testCase.secret, "--scope", testCase.scope,
+				}
+				if testCase.name != "" {
+					cmd = append(cmd, "--name", testCase.name)
+				}
+				if testCase.labels != "" {
+					cmd = append(cmd, "--labels", testCase.labels)
+				}
+				if testCase.version != "" {
+					cmd = append(cmd, "--version", testCase.version)
+				}
+				//
+				// Run twice to verify it is idempotent
+				//
+				for i := 0; i < 2; i++ {
+					uuid, err := cmdForgejoCaptureOutput(t, cmd)
+					assert.NoError(t, err)
+					if assert.EqualValues(t, testCase.uuid, uuid) {
+						ownerName, repoName, found := strings.Cut(testCase.scope, "/")
+						action, err := actions_model.GetRunnerByUUID(gocontext.Background(), uuid)
+						assert.NoError(t, err)
+
+						user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: action.OwnerID})
+						assert.Equal(t, ownerName, user.Name, action.OwnerID)
+
+						if found {
+							repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: action.RepoID})
+							assert.Equal(t, repoName, repo.Name, action.RepoID)
+						}
+						if testCase.name != "" {
+							assert.EqualValues(t, testCase.name, action.Name)
+						}
+						if testCase.labels != "" {
+							labels := strings.Split(testCase.labels, ",")
+							assert.EqualValues(t, labels, action.AgentLabels)
+						}
+						if testCase.version != "" {
+							assert.EqualValues(t, testCase.version, action.Version)
+						}
+					}
+				}
+			})
+		}
 	})
 }

tests/integration/cmd_forgejo_test.go

@@ -17,7 +17,7 @@ import (
 	"github.com/urfave/cli"
 )
 
-func cmdForgejoCaptureOutput(t *testing.T, args []string) (string, error) {
+func cmdForgejoCaptureOutput(t *testing.T, args []string, stdin ...string) (string, error) {
 	r, w, err := os.Pipe()
 	assert.NoError(t, err)
 	set := flag.NewFlagSet("forgejo-cli", 0)