Actions support workflow dispatch event (#28163)

fix #23668 

My plan:
* In the `actions.list` method, if workflow is selected and IsAdmin,
check whether the on event contains `workflow_dispatch`. If so, display
a `Run workflow` button to allow the user to manually trigger the run.
* Providing a form that allows users to select target brach or tag, and
these parameters can be configured in yaml
* Simple form validation, `required` input cannot be empty
* Add a route `/actions/run`, and an `actions.Run` method to handle
* Add `WorkflowDispatchPayload` struct to pass the Webhook event payload
to the runner when triggered, this payload carries the `inputs` values
and other fields, doc: [workflow_dispatch
payload](https://docs.github.com/en/webhooks/webhook-events-and-payloads#workflow_dispatch)

Other PRs
* the `Workflow.WorkflowDispatchConfig()` method still return non-nil
when workflow_dispatch is not defined. I submitted a PR
https://gitea.com/gitea/act/pulls/85 to fix it. Still waiting for them
to process.

Behavior should be same with github, but may cause confusion. Here's a
quick reminder.
*
[Doc](https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#workflow_dispatch)
Said: This event will `only` trigger a workflow run if the workflow file
is `on the default branch`.
* If the workflow yaml file only exists in a non-default branch, it
cannot be triggered. (It will not even show up in the workflow list)
* If the same workflow yaml file exists in each branch at the same time,
the version of the default branch is used. Even if `Use workflow from`
selects another branch


![image](https://github.com/go-gitea/gitea/assets/3114995/4bf596f3-426b-48e8-9b8f-0f6d18defd79)
```yaml
name: Docker Image CI

on:
  workflow_dispatch:
    inputs:
      logLevel:
        description: 'Log level'
        required: true
        default: 'warning'
        type: choice
        options:
        - info
        - warning
        - debug
      tags:
        description: 'Test scenario tags'
        required: false
        type: boolean
      boolean_default_true:
        description: 'Test scenario tags'
        required: true
        type: boolean
        default: true
      boolean_default_false:
        description: 'Test scenario tags'
        required: false
        type: boolean
        default: false
      environment:
        description: 'Environment to run tests against'
        type: environment
        required: true
        default: 'environment values'
      number_required_1:
        description: 'number '
        type: number
        required: true
        default: '100'
      number_required_2:
        description: 'number'
        type: number
        required: true
        default: '100'
      number_required_3:
        description: 'number'
        type: number
        required: true
        default: '100'
      number_1:
        description: 'number'
        type: number
        required: false
      number_2:
        description: 'number'
        type: number
        required: false
      number_3:
        description: 'number'
        type: number
        required: false

env:
  inputs_logLevel:              ${{ inputs.logLevel }}
  inputs_tags:                  ${{ inputs.tags }}
  inputs_boolean_default_true:  ${{ inputs.boolean_default_true }}
  inputs_boolean_default_false: ${{ inputs.boolean_default_false }}
  inputs_environment:           ${{ inputs.environment }}
  inputs_number_1:              ${{ inputs.number_1  }}
  inputs_number_2:              ${{ inputs.number_2  }}
  inputs_number_3:              ${{ inputs.number_3  }}
  inputs_number_required_1:     ${{ inputs.number_required_1  }}
  inputs_number_required_2:     ${{ inputs.number_required_2  }}
  inputs_number_required_3:     ${{ inputs.number_required_3  }}

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - run: ls -la
      - run: env | grep inputs
      - run: echo ${{ inputs.logLevel }}
      - run: echo ${{ inputs.boolean_default_false }}
```

![image](https://github.com/go-gitea/gitea/assets/3114995/a58a842d-a0ff-4618-bc6d-83a9596d07c8)

![image](https://github.com/go-gitea/gitea/assets/3114995/44a7cca5-7bd4-42a9-8723-91751a501c88)

---------

Co-authored-by: TKaxv_7S <954067342@qq.com>
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: Denys Konovalov <kontakt@denyskon.de>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

Author: 5 people

Diff for: modules/structs/hook.go

@@ -494,3 +494,17 @@ type PackagePayload struct {
 func (p *PackagePayload) JSONPayload() ([]byte, error) {
 	return json.MarshalIndent(p, "", "  ")
 }
+
+// WorkflowDispatchPayload represents a workflow dispatch payload
+type WorkflowDispatchPayload struct {
+	Workflow   string         `json:"workflow"`
+	Ref        string         `json:"ref"`
+	Inputs     map[string]any `json:"inputs"`
+	Repository *Repository    `json:"repository"`
+	Sender     *User          `json:"sender"`
+}
+
+// JSONPayload implements Payload
+func (p *WorkflowDispatchPayload) JSONPayload() ([]byte, error) {
+	return json.MarshalIndent(p, "", "  ")
+}

Diff for: options/locale/locale_en-US.ini

@@ -628,6 +628,7 @@ org_still_own_repo = "This organization still owns one or more repositories, del
 org_still_own_packages = "This organization still owns one or more packages, delete them first."
 
 target_branch_not_exist = Target branch does not exist.
+target_ref_not_exist = Target ref does not exist %s
 
 admin_cannot_delete_self = You cannot delete yourself when you are an admin. Please remove your admin privileges first.
 
@@ -3701,6 +3702,11 @@ workflow.disable_success = Workflow '%s' disabled successfully.
 workflow.enable = Enable Workflow
 workflow.enable_success = Workflow '%s' enabled successfully.
 workflow.disabled = Workflow is disabled.
+workflow.run = Run Workflow
+workflow.not_found = Workflow '%s' not found.
+workflow.run_success = Workflow '%s' run successfully.
+workflow.from_ref = Use workflow from
+workflow.has_workflow_dispatch = This workflow has a workflow_dispatch event trigger.
 
 need_approval_desc = Need approval to run workflows for fork pull request.
 

Diff for: routers/web/repo/actions/actions.go

@@ -7,22 +7,28 @@ import (
 	"bytes"
 	"fmt"
 	"net/http"
+	"slices"
 	"strings"
 
 	actions_model "code.gitea.io/gitea/models/actions"
 	"code.gitea.io/gitea/models/db"
+	git_model "code.gitea.io/gitea/models/git"
+	repo_model "code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/models/unit"
 	"code.gitea.io/gitea/modules/actions"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/container"
 	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/optional"
 	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/util"
 	"code.gitea.io/gitea/routers/web/repo"
 	"code.gitea.io/gitea/services/context"
 	"code.gitea.io/gitea/services/convert"
 
 	"github.com/nektos/act/pkg/model"
+	"gopkg.in/yaml.v3"
 )
 
 const (
@@ -58,8 +64,13 @@ func MustEnableActions(ctx *context.Context) {
 func List(ctx *context.Context) {
 	ctx.Data["Title"] = ctx.Tr("actions.actions")
 	ctx.Data["PageIsActions"] = true
+	workflowID := ctx.FormString("workflow")
+	actorID := ctx.FormInt64("actor")
+	status := ctx.FormInt("status")
+	ctx.Data["CurWorkflow"] = workflowID
 
 	var workflows []Workflow
+	var curWorkflow *model.Workflow
 	if empty, err := ctx.Repo.GitRepo.IsEmpty(); err != nil {
 		ctx.ServerError("IsEmpty", err)
 		return
@@ -140,6 +151,10 @@ func List(ctx *context.Context) {
 				workflow.ErrMsg = ctx.Locale.TrString("actions.runs.no_job")
 			}
 			workflows = append(workflows, workflow)
+
+			if workflow.Entry.Name() == workflowID {
+				curWorkflow = wf
+			}
 		}
 	}
 	ctx.Data["workflows"] = workflows
@@ -150,17 +165,46 @@ func List(ctx *context.Context) {
 		page = 1
 	}
 
-	workflow := ctx.FormString("workflow")
-	actorID := ctx.FormInt64("actor")
-	status := ctx.FormInt("status")
-	ctx.Data["CurWorkflow"] = workflow
-
 	actionsConfig := ctx.Repo.Repository.MustGetUnit(ctx, unit.TypeActions).ActionsConfig()
 	ctx.Data["ActionsConfig"] = actionsConfig
 
-	if len(workflow) > 0 && ctx.Repo.IsAdmin() {
+	if len(workflowID) > 0 && ctx.Repo.IsAdmin() {
 		ctx.Data["AllowDisableOrEnableWorkflow"] = true
-		ctx.Data["CurWorkflowDisabled"] = actionsConfig.IsWorkflowDisabled(workflow)
+		isWorkflowDisabled := actionsConfig.IsWorkflowDisabled(workflowID)
+		ctx.Data["CurWorkflowDisabled"] = isWorkflowDisabled
+
+		if !isWorkflowDisabled && curWorkflow != nil {
+			workflowDispatchConfig := workflowDispatchConfig(curWorkflow)
+			if workflowDispatchConfig != nil {
+				ctx.Data["WorkflowDispatchConfig"] = workflowDispatchConfig
+
+				branchOpts := git_model.FindBranchOptions{
+					RepoID:          ctx.Repo.Repository.ID,
+					IsDeletedBranch: optional.Some(false),
+					ListOptions: db.ListOptions{
+						ListAll: true,
+					},
+				}
+				branches, err := git_model.FindBranchNames(ctx, branchOpts)
+				if err != nil {
+					ctx.ServerError("FindBranchNames", err)
+					return
+				}
+				// always put default branch on the top if it exists
+				if slices.Contains(branches, ctx.Repo.Repository.DefaultBranch) {
+					branches = util.SliceRemoveAll(branches, ctx.Repo.Repository.DefaultBranch)
+					branches = append([]string{ctx.Repo.Repository.DefaultBranch}, branches...)
+				}
+				ctx.Data["Branches"] = branches
+
+				tags, err := repo_model.GetTagNamesByRepoID(ctx, ctx.Repo.Repository.ID)
+				if err != nil {
+					ctx.ServerError("GetTagNamesByRepoID", err)
+					return
+				}
+				ctx.Data["Tags"] = tags
+			}
+		}
 	}
 
 	// if status or actor query param is not given to frontend href, (href="/<repoLink>/actions")
@@ -177,7 +221,7 @@ func List(ctx *context.Context) {
 			PageSize: convert.ToCorrectPageSize(ctx.FormInt("limit")),
 		},
 		RepoID:        ctx.Repo.Repository.ID,
-		WorkflowID:    workflow,
+		WorkflowID:    workflowID,
 		TriggerUserID: actorID,
 	}
 
@@ -214,11 +258,94 @@ func List(ctx *context.Context) {
 
 	pager := context.NewPagination(int(total), opts.PageSize, opts.Page, 5)
 	pager.SetDefaultParams(ctx)
-	pager.AddParamString("workflow", workflow)
+	pager.AddParamString("workflow", workflowID)
 	pager.AddParamString("actor", fmt.Sprint(actorID))
 	pager.AddParamString("status", fmt.Sprint(status))
 	ctx.Data["Page"] = pager
 	ctx.Data["HasWorkflowsOrRuns"] = len(workflows) > 0 || len(runs) > 0
 
 	ctx.HTML(http.StatusOK, tplListActions)
 }
+
+type WorkflowDispatchInput struct {
+	Name        string   `yaml:"name"`
+	Description string   `yaml:"description"`
+	Required    bool     `yaml:"required"`
+	Default     string   `yaml:"default"`
+	Type        string   `yaml:"type"`
+	Options     []string `yaml:"options"`
+}
+
+type WorkflowDispatch struct {
+	Inputs []WorkflowDispatchInput
+}
+
+func workflowDispatchConfig(w *model.Workflow) *WorkflowDispatch {
+	switch w.RawOn.Kind {
+	case yaml.ScalarNode:
+		var val string
+		if !decodeNode(w.RawOn, &val) {
+			return nil
+		}
+		if val == "workflow_dispatch" {
+			return &WorkflowDispatch{}
+		}
+	case yaml.SequenceNode:
+		var val []string
+		if !decodeNode(w.RawOn, &val) {
+			return nil
+		}
+		for _, v := range val {
+			if v == "workflow_dispatch" {
+				return &WorkflowDispatch{}
+			}
+		}
+	case yaml.MappingNode:
+		var val map[string]yaml.Node
+		if !decodeNode(w.RawOn, &val) {
+			return nil
+		}
+
+		workflowDispatchNode, found := val["workflow_dispatch"]
+		if !found {
+			return nil
+		}
+
+		var workflowDispatch WorkflowDispatch
+		var workflowDispatchVal map[string]yaml.Node
+		if !decodeNode(workflowDispatchNode, &workflowDispatchVal) {
+			return &workflowDispatch
+		}
+
+		inputsNode, found := workflowDispatchVal["inputs"]
+		if !found || inputsNode.Kind != yaml.MappingNode {
+			return &workflowDispatch
+		}
+
+		i := 0
+		for {
+			if i+1 >= len(inputsNode.Content) {
+				break
+			}
+			var input WorkflowDispatchInput
+			if decodeNode(*inputsNode.Content[i+1], &input) {
+				input.Name = inputsNode.Content[i].Value
+				workflowDispatch.Inputs = append(workflowDispatch.Inputs, input)
+			}
+			i += 2
+		}
+		return &workflowDispatch
+
+	default:
+		return nil
+	}
+	return nil
+}
+
+func decodeNode(node yaml.Node, out any) bool {
+	if err := node.Decode(out); err != nil {
+		log.Warn("Failed to decode node %v into %T: %v", node, out, err)
+		return false
+	}
+	return true
+}