Implement actions (#21937)

Close #13539.

Co-authored by: @lunny @appleboy @fuxiaohei and others.

Related projects:
- https://gitea.com/gitea/actions-proto-def
- https://gitea.com/gitea/actions-proto-go
- https://gitea.com/gitea/act
- https://gitea.com/gitea/act_runner

### Summary

The target of this PR is to bring a basic implementation of "Actions",
an internal CI/CD system of Gitea. That means even though it has been
merged, the state of the feature is **EXPERIMENTAL**, and please note
that:

- It is disabled by default;
- It shouldn't be used in a production environment currently;
- It shouldn't be used in a public Gitea instance currently;
- Breaking changes may be made before it's stable.

**Please comment on #13539 if you have any different product design
ideas**, all decisions reached there will be adopted here. But in this
PR, we don't talk about **naming, feature-creep or alternatives**.

### ⚠️ Breaking

`gitea-actions` will become a reserved user name. If a user with the
name already exists in the database, it is recommended to rename it.

### Some important reviews

- What is `DEFAULT_ACTIONS_URL` in `app.ini` for?
  - https://github.com/go-gitea/gitea/pull/21937#discussion_r1055954954
- Why the api for runners is not under the normal `/api/v1` prefix?
  - https://github.com/go-gitea/gitea/pull/21937#discussion_r1061173592
- Why DBFS?
  - https://github.com/go-gitea/gitea/pull/21937#discussion_r1061301178
- Why ignore events triggered by `gitea-actions` bot?
  - https://github.com/go-gitea/gitea/pull/21937#discussion_r1063254103
- Why there's no permission control for actions?
  - https://github.com/go-gitea/gitea/pull/21937#discussion_r1090229868

### What it looks like

<details>

#### Manage runners

<img width="1792" alt="image"
src="https://user-images.githubusercontent.com/9418365/205870657-c72f590e-2e08-4cd4-be7f-2e0abb299bbf.png">

#### List runs

<img width="1792" alt="image"
src="https://user-images.githubusercontent.com/9418365/205872794-50fde990-2b45-48c1-a178-908e4ec5b627.png">


#### View logs

<img width="1792" alt="image"
src="https://user-images.githubusercontent.com/9418365/205872501-9b7b9000-9542-4991-8f55-18ccdada77c3.png">



</details>

### How to try it

<details>

#### 1. Start Gitea

Clone this branch and [install from
source](https://docs.gitea.io/en-us/install-from-source).

Add additional configurations in `app.ini` to enable Actions:

```ini
[actions]
ENABLED = true
```

Start it.

If all is well, you'll see the management page of runners:

<img width="1792" alt="image"
src="https://user-images.githubusercontent.com/9418365/205877365-8e30a780-9b10-4154-b3e8-ee6c3cb35a59.png">


#### 2. Start runner

Clone the [act_runner](https://gitea.com/gitea/act_runner), and follow
the
[README](https://gitea.com/gitea/act_runner/src/branch/main/README.md)
to start it.

If all is well, you'll see a new runner has been added:

<img width="1792" alt="image"
src="https://user-images.githubusercontent.com/9418365/205878000-216f5937-e696-470d-b66c-8473987d91c3.png">

#### 3. Enable actions for a repo

Create a new repo or open an existing one, check the `Actions` checkbox
in settings and submit.

<img width="1792" alt="image"
src="https://user-images.githubusercontent.com/9418365/205879705-53e09208-73c0-4b3e-a123-2dcf9aba4b9c.png">
<img width="1792" alt="image"
src="https://user-images.githubusercontent.com/9418365/205879383-23f3d08f-1a85-41dd-a8b3-54e2ee6453e8.png">

If all is well, you'll see a new tab "Actions":

<img width="1792" alt="image"
src="https://user-images.githubusercontent.com/9418365/205881648-a8072d8c-5803-4d76-b8a8-9b2fb49516c1.png">

#### 4. Upload workflow files

Upload some workflow files to `.gitea/workflows/xxx.yaml`, you can
follow the [quickstart](https://docs.github.com/en/actions/quickstart)
of GitHub Actions. Yes, Gitea Actions is compatible with GitHub Actions
in most cases, you can use the same demo:

```yaml
name: GitHub Actions Demo
run-name: ${{ github.actor }} is testing out GitHub Actions 🚀
on: [push]
jobs:
  Explore-GitHub-Actions:
    runs-on: ubuntu-latest
    steps:
      - run: echo "🎉 The job was automatically triggered by a ${{ github.event_name }} event."
      - run: echo "🐧 This job is now running on a ${{ runner.os }} server hosted by GitHub!"
      - run: echo "🔎 The name of your branch is ${{ github.ref }} and your repository is ${{ github.repository }}."
      - name: Check out repository code
        uses: actions/checkout@v3
      - run: echo "💡 The ${{ github.repository }} repository has been cloned to the runner."
      - run: echo "🖥️ The workflow is now ready to test your code on the runner."
      - name: List files in the repository
        run: |
          ls ${{ github.workspace }}
      - run: echo "🍏 This job's status is ${{ job.status }}."
```

If all is well, you'll see a new run in `Actions` tab:

<img width="1792" alt="image"
src="https://user-images.githubusercontent.com/9418365/205884473-79a874bc-171b-4aaf-acd5-0241a45c3b53.png">

#### 5. Check the logs of jobs

Click a run and you'll see the logs:

<img width="1792" alt="image"
src="https://user-images.githubusercontent.com/9418365/205884800-994b0374-67f7-48ff-be9a-4c53f3141547.png">

#### 6. Go on

You can try more examples in [the
documents](https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions)
of GitHub Actions, then you might find a lot of bugs.

Come on, PRs are welcome.

</details>

See also: [Feature Preview: Gitea
Actions](https://blog.gitea.io/2022/12/feature-preview-gitea-actions/)

---------

Co-authored-by: a1012112796 <1012112796@qq.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: delvh <dev.lh@web.de>
Co-authored-by: ChristopherHX <christopher.homberger@web.de>
Co-authored-by: John Olheiser <john.olheiser@gmail.com>

7 files changed, 585 insertions, 4 deletions

diff --git a/routers/api/actions/actions.go b/routers/api/actions/actions.go
new file mode 100644
index 0000000000..bdcac41206
--- /dev/null
+++ b/routers/api/actions/actions.go
@@ -0,0 +1,25 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package actions
+
+import (
+	"context"
+	"net/http"
+
+	"code.gitea.io/gitea/modules/web"
+	"code.gitea.io/gitea/routers/api/actions/ping"
+	"code.gitea.io/gitea/routers/api/actions/runner"
+)
+
+func Routes(_ context.Context, prefix string) *web.Route {
+	m := web.NewRoute()
+
+	path, handler := ping.NewPingServiceHandler()
+	m.Post(path+"*", http.StripPrefix(prefix, handler).ServeHTTP)
+
+	path, handler = runner.NewRunnerServiceHandler()
+	m.Post(path+"*", http.StripPrefix(prefix, handler).ServeHTTP)
+
+	return m
+}
diff --git a/routers/api/actions/ping/ping.go b/routers/api/actions/ping/ping.go
new file mode 100644
index 0000000000..55219fe12b
--- /dev/null
+++ b/routers/api/actions/ping/ping.go
@@ -0,0 +1,38 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package ping
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+
+	"code.gitea.io/gitea/modules/log"
+
+	pingv1 "code.gitea.io/actions-proto-go/ping/v1"
+	"code.gitea.io/actions-proto-go/ping/v1/pingv1connect"
+	"github.com/bufbuild/connect-go"
+)
+
+func NewPingServiceHandler() (string, http.Handler) {
+	return pingv1connect.NewPingServiceHandler(&Service{})
+}
+
+var _ pingv1connect.PingServiceHandler = (*Service)(nil)
+
+type Service struct {
+	pingv1connect.UnimplementedPingServiceHandler
+}
+
+func (s *Service) Ping(
+	ctx context.Context,
+	req *connect.Request[pingv1.PingRequest],
+) (*connect.Response[pingv1.PingResponse], error) {
+	log.Trace("Content-Type: %s", req.Header().Get("Content-Type"))
+	log.Trace("User-Agent: %s", req.Header().Get("User-Agent"))
+	res := connect.NewResponse(&pingv1.PingResponse{
+		Data: fmt.Sprintf("Hello, %s!", req.Msg.Data),
+	})
+	return res, nil
+}
diff --git a/routers/api/actions/ping/ping_test.go b/routers/api/actions/ping/ping_test.go
new file mode 100644
index 0000000000..f39e94a1f3
--- /dev/null
+++ b/routers/api/actions/ping/ping_test.go
@@ -0,0 +1,61 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package ping
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	pingv1 "code.gitea.io/actions-proto-go/ping/v1"
+	"code.gitea.io/actions-proto-go/ping/v1/pingv1connect"
+	"github.com/bufbuild/connect-go"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestService(t *testing.T) {
+	mux := http.NewServeMux()
+	mux.Handle(pingv1connect.NewPingServiceHandler(
+		&Service{},
+	))
+	MainServiceTest(t, mux)
+}
+
+func MainServiceTest(t *testing.T, h http.Handler) {
+	t.Parallel()
+	server := httptest.NewUnstartedServer(h)
+	server.EnableHTTP2 = true
+	server.StartTLS()
+	defer server.Close()
+
+	connectClient := pingv1connect.NewPingServiceClient(
+		server.Client(),
+		server.URL,
+	)
+
+	grpcClient := pingv1connect.NewPingServiceClient(
+		server.Client(),
+		server.URL,
+		connect.WithGRPC(),
+	)
+
+	grpcWebClient := pingv1connect.NewPingServiceClient(
+		server.Client(),
+		server.URL,
+		connect.WithGRPCWeb(),
+	)
+
+	clients := []pingv1connect.PingServiceClient{connectClient, grpcClient, grpcWebClient}
+	t.Run("ping request", func(t *testing.T) {
+		for _, client := range clients {
+			result, err := client.Ping(context.Background(), connect.NewRequest(&pingv1.PingRequest{
+				Data: "foobar",
+			}))
+			require.NoError(t, err)
+			assert.Equal(t, "Hello, foobar!", result.Msg.Data)
+		}
+	})
+}
diff --git a/routers/api/actions/runner/interceptor.go b/routers/api/actions/runner/interceptor.go
new file mode 100644
index 0000000000..8c0bd86ecb
--- /dev/null
+++ b/routers/api/actions/runner/interceptor.go
@@ -0,0 +1,79 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package runner
+
+import (
+	"context"
+	"crypto/subtle"
+	"errors"
+	"strings"
+
+	actions_model "code.gitea.io/gitea/models/actions"
+	auth_model "code.gitea.io/gitea/models/auth"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/timeutil"
+	"code.gitea.io/gitea/modules/util"
+
+	"github.com/bufbuild/connect-go"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+const (
+	uuidHeaderKey  = "x-runner-uuid"
+	tokenHeaderKey = "x-runner-token"
+)
+
+var withRunner = connect.WithInterceptors(connect.UnaryInterceptorFunc(func(unaryFunc connect.UnaryFunc) connect.UnaryFunc {
+	return func(ctx context.Context, request connect.AnyRequest) (connect.AnyResponse, error) {
+		methodName := getMethodName(request)
+		if methodName == "Register" {
+			return unaryFunc(ctx, request)
+		}
+		uuid := request.Header().Get(uuidHeaderKey)
+		token := request.Header().Get(tokenHeaderKey)
+		runner, err := actions_model.GetRunnerByUUID(ctx, uuid)
+		if err != nil {
+			if errors.Is(err, util.ErrNotExist) {
+				return nil, status.Error(codes.Unauthenticated, "unregistered runner")
+			}
+			return nil, status.Error(codes.Internal, err.Error())
+		}
+		if subtle.ConstantTimeCompare([]byte(runner.TokenHash), []byte(auth_model.HashToken(token, runner.TokenSalt))) != 1 {
+			return nil, status.Error(codes.Unauthenticated, "unregistered runner")
+		}
+
+		cols := []string{"last_online"}
+		runner.LastOnline = timeutil.TimeStampNow()
+		if methodName == "UpdateTask" || methodName == "UpdateLog" {
+			runner.LastActive = timeutil.TimeStampNow()
+			cols = append(cols, "last_active")
+		}
+		if err := actions_model.UpdateRunner(ctx, runner, cols...); err != nil {
+			log.Error("can't update runner status: %v", err)
+		}
+
+		ctx = context.WithValue(ctx, runnerCtxKey{}, runner)
+		return unaryFunc(ctx, request)
+	}
+}))
+
+func getMethodName(req connect.AnyRequest) string {
+	splits := strings.Split(req.Spec().Procedure, "/")
+	if len(splits) > 0 {
+		return splits[len(splits)-1]
+	}
+	return ""
+}
+
+type runnerCtxKey struct{}
+
+func GetRunner(ctx context.Context) *actions_model.ActionRunner {
+	if v := ctx.Value(runnerCtxKey{}); v != nil {
+		if r, ok := v.(*actions_model.ActionRunner); ok {
+			return r
+		}
+	}
+	return nil
+}
diff --git a/routers/api/actions/runner/runner.go b/routers/api/actions/runner/runner.go
new file mode 100644
index 0000000000..7dbab9da0a
--- /dev/null
+++ b/routers/api/actions/runner/runner.go
@@ -0,0 +1,221 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package runner
+
+import (
+	"context"
+	"errors"
+	"net/http"
+
+	actions_model "code.gitea.io/gitea/models/actions"
+	"code.gitea.io/gitea/modules/actions"
+	"code.gitea.io/gitea/modules/json"
+	"code.gitea.io/gitea/modules/log"
+	actions_service "code.gitea.io/gitea/services/actions"
+
+	runnerv1 "code.gitea.io/actions-proto-go/runner/v1"
+	"code.gitea.io/actions-proto-go/runner/v1/runnerv1connect"
+	"github.com/bufbuild/connect-go"
+	gouuid "github.com/google/uuid"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+func NewRunnerServiceHandler() (string, http.Handler) {
+	return runnerv1connect.NewRunnerServiceHandler(
+		&Service{},
+		connect.WithCompressMinBytes(1024),
+		withRunner,
+	)
+}
+
+var _ runnerv1connect.RunnerServiceClient = (*Service)(nil)
+
+type Service struct {
+	runnerv1connect.UnimplementedRunnerServiceHandler
+}
+
+// Register for new runner.
+func (s *Service) Register(
+	ctx context.Context,
+	req *connect.Request[runnerv1.RegisterRequest],
+) (*connect.Response[runnerv1.RegisterResponse], error) {
+	if req.Msg.Token == "" || req.Msg.Name == "" {
+		return nil, errors.New("missing runner token, name")
+	}
+
+	runnerToken, err := actions_model.GetRunnerToken(ctx, req.Msg.Token)
+	if err != nil {
+		return nil, errors.New("runner token not found")
+	}
+
+	if runnerToken.IsActive {
+		return nil, errors.New("runner token has already activated")
+	}
+
+	// create new runner
+	runner := &actions_model.ActionRunner{
+		UUID:         gouuid.New().String(),
+		Name:         req.Msg.Name,
+		OwnerID:      runnerToken.OwnerID,
+		RepoID:       runnerToken.RepoID,
+		AgentLabels:  req.Msg.AgentLabels,
+		CustomLabels: req.Msg.CustomLabels,
+	}
+	if err := runner.GenerateToken(); err != nil {
+		return nil, errors.New("can't generate token")
+	}
+
+	// create new runner
+	if err := actions_model.CreateRunner(ctx, runner); err != nil {
+		return nil, errors.New("can't create new runner")
+	}
+
+	// update token status
+	runnerToken.IsActive = true
+	if err := actions_model.UpdateRunnerToken(ctx, runnerToken, "is_active"); err != nil {
+		return nil, errors.New("can't update runner token status")
+	}
+
+	res := connect.NewResponse(&runnerv1.RegisterResponse{
+		Runner: &runnerv1.Runner{
+			Id:           runner.ID,
+			Uuid:         runner.UUID,
+			Token:        runner.Token,
+			Name:         runner.Name,
+			AgentLabels:  runner.AgentLabels,
+			CustomLabels: runner.CustomLabels,
+		},
+	})
+
+	return res, nil
+}
+
+// FetchTask assigns a task to the runner
+func (s *Service) FetchTask(
+	ctx context.Context,
+	req *connect.Request[runnerv1.FetchTaskRequest],
+) (*connect.Response[runnerv1.FetchTaskResponse], error) {
+	runner := GetRunner(ctx)
+
+	var task *runnerv1.Task
+	if t, ok, err := pickTask(ctx, runner); err != nil {
+		log.Error("pick task failed: %v", err)
+		return nil, status.Errorf(codes.Internal, "pick task: %v", err)
+	} else if ok {
+		task = t
+	}
+
+	res := connect.NewResponse(&runnerv1.FetchTaskResponse{
+		Task: task,
+	})
+	return res, nil
+}
+
+// UpdateTask updates the task status.
+func (s *Service) UpdateTask(
+	ctx context.Context,
+	req *connect.Request[runnerv1.UpdateTaskRequest],
+) (*connect.Response[runnerv1.UpdateTaskResponse], error) {
+	{
+		// to debug strange runner behaviors, it could be removed if all problems have been solved.
+		stateMsg, _ := json.Marshal(req.Msg.State)
+		log.Trace("update task with state: %s", stateMsg)
+	}
+
+	// Get Task first
+	task, err := actions_model.GetTaskByID(ctx, req.Msg.State.Id)
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "can't find the task: %v", err)
+	}
+	if task.Status.IsCancelled() {
+		return connect.NewResponse(&runnerv1.UpdateTaskResponse{
+			State: &runnerv1.TaskState{
+				Id:     req.Msg.State.Id,
+				Result: task.Status.AsResult(),
+			},
+		}), nil
+	}
+
+	task, err = actions_model.UpdateTaskByState(ctx, req.Msg.State)
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "update task: %v", err)
+	}
+
+	if err := task.LoadJob(ctx); err != nil {
+		return nil, status.Errorf(codes.Internal, "load job: %v", err)
+	}
+
+	if err := actions_service.CreateCommitStatus(ctx, task.Job); err != nil {
+		log.Error("Update commit status failed: %v", err)
+		// go on
+	}
+
+	if req.Msg.State.Result != runnerv1.Result_RESULT_UNSPECIFIED {
+		if err := actions_service.EmitJobsIfReady(task.Job.RunID); err != nil {
+			log.Error("Emit ready jobs of run %d: %v", task.Job.RunID, err)
+		}
+	}
+
+	return connect.NewResponse(&runnerv1.UpdateTaskResponse{
+		State: &runnerv1.TaskState{
+			Id:     req.Msg.State.Id,
+			Result: task.Status.AsResult(),
+		},
+	}), nil
+}
+
+// UpdateLog uploads log of the task.
+func (s *Service) UpdateLog(
+	ctx context.Context,
+	req *connect.Request[runnerv1.UpdateLogRequest],
+) (*connect.Response[runnerv1.UpdateLogResponse], error) {
+	res := connect.NewResponse(&runnerv1.UpdateLogResponse{})
+
+	task, err := actions_model.GetTaskByID(ctx, req.Msg.TaskId)
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "get task: %v", err)
+	}
+	ack := task.LogLength
+
+	if len(req.Msg.Rows) == 0 || req.Msg.Index > ack || int64(len(req.Msg.Rows))+req.Msg.Index <= ack {
+		res.Msg.AckIndex = ack
+		return res, nil
+	}
+
+	if task.LogInStorage {
+		return nil, status.Errorf(codes.AlreadyExists, "log file has been archived")
+	}
+
+	rows := req.Msg.Rows[ack-req.Msg.Index:]
+	ns, err := actions.WriteLogs(ctx, task.LogFilename, task.LogSize, rows)
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "write logs: %v", err)
+	}
+	task.LogLength += int64(len(rows))
+	for _, n := range ns {
+		task.LogIndexes = append(task.LogIndexes, task.LogSize)
+		task.LogSize += int64(n)
+	}
+
+	res.Msg.AckIndex = task.LogLength
+
+	var remove func()
+	if req.Msg.NoMore {
+		task.LogInStorage = true
+		remove, err = actions.TransferLogs(ctx, task.LogFilename)
+		if err != nil {
+			return nil, status.Errorf(codes.Internal, "transfer logs: %v", err)
+		}
+	}
+
+	if err := actions_model.UpdateTask(ctx, task, "log_indexes", "log_length", "log_size", "log_in_storage"); err != nil {
+		return nil, status.Errorf(codes.Internal, "update task: %v", err)
+	}
+	if remove != nil {
+		remove()
+	}
+
+	return res, nil
+}
diff --git a/routers/api/actions/runner/utils.go b/routers/api/actions/runner/utils.go
new file mode 100644
index 0000000000..80e71941f2
--- /dev/null
+++ b/routers/api/actions/runner/utils.go
@@ -0,0 +1,122 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package runner
+
+import (
+	"context"
+	"fmt"
+
+	actions_model "code.gitea.io/gitea/models/actions"
+	secret_model "code.gitea.io/gitea/models/secret"
+	"code.gitea.io/gitea/modules/json"
+	"code.gitea.io/gitea/modules/log"
+	secret_module "code.gitea.io/gitea/modules/secret"
+	"code.gitea.io/gitea/modules/setting"
+
+	runnerv1 "code.gitea.io/actions-proto-go/runner/v1"
+	"google.golang.org/protobuf/types/known/structpb"
+)
+
+func pickTask(ctx context.Context, runner *actions_model.ActionRunner) (*runnerv1.Task, bool, error) {
+	t, ok, err := actions_model.CreateTaskForRunner(ctx, runner)
+	if err != nil {
+		return nil, false, fmt.Errorf("CreateTaskForRunner: %w", err)
+	}
+	if !ok {
+		return nil, false, nil
+	}
+
+	task := &runnerv1.Task{
+		Id:              t.ID,
+		WorkflowPayload: t.Job.WorkflowPayload,
+		Context:         generateTaskContext(t),
+		Secrets:         getSecretsOfTask(ctx, t),
+	}
+	return task, true, nil
+}
+
+func getSecretsOfTask(ctx context.Context, task *actions_model.ActionTask) map[string]string {
+	secrets := map[string]string{}
+	if task.Job.Run.IsForkPullRequest {
+		// ignore secrets for fork pull request
+		return secrets
+	}
+
+	ownerSecrets, err := secret_model.FindSecrets(ctx, secret_model.FindSecretsOptions{OwnerID: task.Job.Run.Repo.OwnerID})
+	if err != nil {
+		log.Error("find secrets of owner %v: %v", task.Job.Run.Repo.OwnerID, err)
+		// go on
+	}
+	repoSecrets, err := secret_model.FindSecrets(ctx, secret_model.FindSecretsOptions{RepoID: task.Job.Run.RepoID})
+	if err != nil {
+		log.Error("find secrets of repo %v: %v", task.Job.Run.RepoID, err)
+		// go on
+	}
+
+	for _, secret := range append(ownerSecrets, repoSecrets...) {
+		if v, err := secret_module.DecryptSecret(setting.SecretKey, secret.Data); err != nil {
+			log.Error("decrypt secret %v %q: %v", secret.ID, secret.Name, err)
+			// go on
+		} else {
+			secrets[secret.Name] = v
+		}
+	}
+
+	if _, ok := secrets["GITHUB_TOKEN"]; !ok {
+		secrets["GITHUB_TOKEN"] = task.Token
+	}
+	if _, ok := secrets["GITEA_TOKEN"]; !ok {
+		secrets["GITEA_TOKEN"] = task.Token
+	}
+
+	return secrets
+}
+
+func generateTaskContext(t *actions_model.ActionTask) *structpb.Struct {
+	event := map[string]interface{}{}
+	_ = json.Unmarshal([]byte(t.Job.Run.EventPayload), &event)
+
+	taskContext, _ := structpb.NewStruct(map[string]interface{}{
+		// standard contexts, see https://docs.github.com/en/actions/learn-github-actions/contexts#github-context
+		"action":            "",                                                   // string, The name of the action currently running, or the id of a step. GitHub removes special characters, and uses the name __run when the current step runs a script without an id. If you use the same action more than once in the same job, the name will include a suffix with the sequence number with underscore before it. For example, the first script you run will have the name __run, and the second script will be named __run_2. Similarly, the second invocation of actions/checkout will be actionscheckout2.
+		"action_path":       "",                                                   // string, The path where an action is located. This property is only supported in composite actions. You can use this path to access files located in the same repository as the action.
+		"action_ref":        "",                                                   // string, For a step executing an action, this is the ref of the action being executed. For example, v2.
+		"action_repository": "",                                                   // string, For a step executing an action, this is the owner and repository name of the action. For example, actions/checkout.
+		"action_status":     "",                                                   // string, For a composite action, the current result of the composite action.
+		"actor":             t.Job.Run.TriggerUser.Name,                           // string, The username of the user that triggered the initial workflow run. If the workflow run is a re-run, this value may differ from github.triggering_actor. Any workflow re-runs will use the privileges of github.actor, even if the actor initiating the re-run (github.triggering_actor) has different privileges.
+		"api_url":           "",                                                   // string, The URL of the GitHub REST API.
+		"base_ref":          "",                                                   // string, The base_ref or target branch of the pull request in a workflow run. This property is only available when the event that triggers a workflow run is either pull_request or pull_request_target.
+		"env":               "",                                                   // string, Path on the runner to the file that sets environment variables from workflow commands. This file is unique to the current step and is a different file for each step in a job. For more information, see "Workflow commands for GitHub Actions."
+		"event":             event,                                                // object, The full event webhook payload. You can access individual properties of the event using this context. This object is identical to the webhook payload of the event that triggered the workflow run, and is different for each event. The webhooks for each GitHub Actions event is linked in "Events that trigger workflows." For example, for a workflow run triggered by the push event, this object contains the contents of the push webhook payload.
+		"event_name":        t.Job.Run.Event.Event(),                              // string, The name of the event that triggered the workflow run.
+		"event_path":        "",                                                   // string, The path to the file on the runner that contains the full event webhook payload.
+		"graphql_url":       "",                                                   // string, The URL of the GitHub GraphQL API.
+		"head_ref":          "",                                                   // string, The head_ref or source branch of the pull request in a workflow run. This property is only available when the event that triggers a workflow run is either pull_request or pull_request_target.
+		"job":               fmt.Sprint(t.JobID),                                  // string, The job_id of the current job.
+		"ref":               t.Job.Run.Ref,                                        // string, The fully-formed ref of the branch or tag that triggered the workflow run. For workflows triggered by push, this is the branch or tag ref that was pushed. For workflows triggered by pull_request, this is the pull request merge branch. For workflows triggered by release, this is the release tag created. For other triggers, this is the branch or tag ref that triggered the workflow run. This is only set if a branch or tag is available for the event type. The ref given is fully-formed, meaning that for branches the format is refs/heads/<branch_name>, for pull requests it is refs/pull/<pr_number>/merge, and for tags it is refs/tags/<tag_name>. For example, refs/heads/feature-branch-1.
+		"ref_name":          t.Job.Run.Ref,                                        // string, The short ref name of the branch or tag that triggered the workflow run. This value matches the branch or tag name shown on GitHub. For example, feature-branch-1.
+		"ref_protected":     false,                                                // boolean, true if branch protections are configured for the ref that triggered the workflow run.
+		"ref_type":          "",                                                   // string, The type of ref that triggered the workflow run. Valid values are branch or tag.
+		"path":              "",                                                   // string, Path on the runner to the file that sets system PATH variables from workflow commands. This file is unique to the current step and is a different file for each step in a job. For more information, see "Workflow commands for GitHub Actions."
+		"repository":        t.Job.Run.Repo.OwnerName + "/" + t.Job.Run.Repo.Name, // string, The owner and repository name. For example, Codertocat/Hello-World.
+		"repository_owner":  t.Job.Run.Repo.OwnerName,                             // string, The repository owner's name. For example, Codertocat.
+		"repositoryUrl":     t.Job.Run.Repo.HTMLURL(),                             // string, The Git URL to the repository. For example, git://github.com/codertocat/hello-world.git.
+		"retention_days":    "",                                                   // string, The number of days that workflow run logs and artifacts are kept.
+		"run_id":            fmt.Sprint(t.Job.RunID),                              // string, A unique number for each workflow run within a repository. This number does not change if you re-run the workflow run.
+		"run_number":        fmt.Sprint(t.Job.Run.Index),                          // string, A unique number for each run of a particular workflow in a repository. This number begins at 1 for the workflow's first run, and increments with each new run. This number does not change if you re-run the workflow run.
+		"run_attempt":       fmt.Sprint(t.Job.Attempt),                            // string, A unique number for each attempt of a particular workflow run in a repository. This number begins at 1 for the workflow run's first attempt, and increments with each re-run.
+		"secret_source":     "Actions",                                            // string, The source of a secret used in a workflow. Possible values are None, Actions, Dependabot, or Codespaces.
+		"server_url":        setting.AppURL,                                       // string, The URL of the GitHub server. For example: https://github.com.
+		"sha":               t.Job.Run.CommitSHA,                                  // string, The commit SHA that triggered the workflow. The value of this commit SHA depends on the event that triggered the workflow. For more information, see "Events that trigger workflows." For example, ffac537e6cbbf934b08745a378932722df287a53.
+		"token":             t.Token,                                              // string, A token to authenticate on behalf of the GitHub App installed on your repository. This is functionally equivalent to the GITHUB_TOKEN secret. For more information, see "Automatic token authentication."
+		"triggering_actor":  "",                                                   // string, The username of the user that initiated the workflow run. If the workflow run is a re-run, this value may differ from github.actor. Any workflow re-runs will use the privileges of github.actor, even if the actor initiating the re-run (github.triggering_actor) has different privileges.
+		"workflow":          t.Job.Run.WorkflowID,                                 // string, The name of the workflow. If the workflow file doesn't specify a name, the value of this property is the full path of the workflow file in the repository.
+		"workspace":         "",                                                   // string, The default working directory on the runner for steps, and the default location of your repository when using the checkout action.
+
+		// additional contexts
+		"gitea_default_actions_url": setting.Actions.DefaultActionsURL,
+	})
+
+	return taskContext
+}
diff --git a/routers/api/v1/api.go b/routers/api/v1/api.go
index eef2a64244..5f57977c29 100644
--- a/routers/api/v1/api.go
+++ b/routers/api/v1/api.go
@@ -69,6 +69,7 @@ import (
 	"net/http"
 	"strings"
 
+	actions_model "code.gitea.io/gitea/models/actions"
 	auth_model "code.gitea.io/gitea/models/auth"
 	"code.gitea.io/gitea/models/organization"
 	"code.gitea.io/gitea/models/perm"
@@ -184,10 +185,39 @@ func repoAssignment() func(ctx *context.APIContext) {
 		repo.Owner = owner
 		ctx.Repo.Repository = repo
 
-		ctx.Repo.Permission, err = access_model.GetUserRepoPermission(ctx, repo, ctx.Doer)
-		if err != nil {
-			ctx.Error(http.StatusInternalServerError, "GetUserRepoPermission", err)
-			return
+		if ctx.Doer != nil && ctx.Doer.ID == user_model.ActionsUserID {
+			taskID := ctx.Data["ActionsTaskID"].(int64)
+			task, err := actions_model.GetTaskByID(ctx, taskID)
+			if err != nil {
+				ctx.Error(http.StatusInternalServerError, "actions_model.GetTaskByID", err)
+				return
+			}
+			if task.RepoID != repo.ID {
+				ctx.NotFound()
+				return
+			}
+
+			if task.IsForkPullRequest {
+				ctx.Repo.Permission.AccessMode = perm.AccessModeRead
+			} else {
+				ctx.Repo.Permission.AccessMode = perm.AccessModeWrite
+			}
+
+			if err := ctx.Repo.Repository.LoadUnits(ctx); err != nil {
+				ctx.Error(http.StatusInternalServerError, "LoadUnits", err)
+				return
+			}
+			ctx.Repo.Permission.Units = ctx.Repo.Repository.Units
+			ctx.Repo.Permission.UnitsMode = make(map[unit.Type]perm.AccessMode)
+			for _, u := range ctx.Repo.Repository.Units {
+				ctx.Repo.Permission.UnitsMode[u.Type] = ctx.Repo.Permission.AccessMode
+			}
+		} else {
+			ctx.Repo.Permission, err = access_model.GetUserRepoPermission(ctx, repo, ctx.Doer)
+			if err != nil {
+				ctx.Error(http.StatusInternalServerError, "GetUserRepoPermission", err)
+				return
+			}
 		}
 
 		if !ctx.Repo.HasAccess() {
@@ -209,6 +239,11 @@ func reqPackageAccess(accessMode perm.AccessMode) func(ctx *context.APIContext)
 // Contexter middleware already checks token for user sign in process.
 func reqToken(requiredScope auth_model.AccessTokenScope) func(ctx *context.APIContext) {
 	return func(ctx *context.APIContext) {
+		// If actions token is present
+		if true == ctx.Data["IsActionsToken"] {
+			return
+		}
+
 		// If OAuth2 token is present
 		if _, ok := ctx.Data["ApiTokenScope"]; ctx.Data["IsApiToken"] == true && ok {
 			// no scope required