forgejo/services/actions/job_emitter.go
Jason Song 4011821c94
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>
2023-01-31 09:45:19 +08:00

140 lines
3.3 KiB
Go

// Copyright 2022 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package actions
import (
"context"
"errors"
"fmt"
actions_model "code.gitea.io/gitea/models/actions"
"code.gitea.io/gitea/models/db"
"code.gitea.io/gitea/modules/graceful"
"code.gitea.io/gitea/modules/queue"
"xorm.io/builder"
)
var jobEmitterQueue queue.UniqueQueue
type jobUpdate struct {
RunID int64
}
func EmitJobsIfReady(runID int64) error {
err := jobEmitterQueue.Push(&jobUpdate{
RunID: runID,
})
if errors.Is(err, queue.ErrAlreadyInQueue) {
return nil
}
return err
}
func jobEmitterQueueHandle(data ...queue.Data) []queue.Data {
ctx := graceful.GetManager().ShutdownContext()
var ret []queue.Data
for _, d := range data {
update := d.(*jobUpdate)
if err := checkJobsOfRun(ctx, update.RunID); err != nil {
ret = append(ret, d)
}
}
return ret
}
func checkJobsOfRun(ctx context.Context, runID int64) error {
return db.WithTx(ctx, func(ctx context.Context) error {
jobs, _, err := actions_model.FindRunJobs(ctx, actions_model.FindRunJobOptions{RunID: runID})
if err != nil {
return err
}
idToJobs := make(map[string][]*actions_model.ActionRunJob, len(jobs))
for _, job := range jobs {
idToJobs[job.JobID] = append(idToJobs[job.JobID], job)
}
updates := newJobStatusResolver(jobs).Resolve()
for _, job := range jobs {
if status, ok := updates[job.ID]; ok {
job.Status = status
if n, err := actions_model.UpdateRunJob(ctx, job, builder.Eq{"status": actions_model.StatusBlocked}, "status"); err != nil {
return err
} else if n != 1 {
return fmt.Errorf("no affected for updating blocked job %v", job.ID)
}
}
}
return nil
})
}
type jobStatusResolver struct {
statuses map[int64]actions_model.Status
needs map[int64][]int64
}
func newJobStatusResolver(jobs actions_model.ActionJobList) *jobStatusResolver {
idToJobs := make(map[string][]*actions_model.ActionRunJob, len(jobs))
for _, job := range jobs {
idToJobs[job.JobID] = append(idToJobs[job.JobID], job)
}
statuses := make(map[int64]actions_model.Status, len(jobs))
needs := make(map[int64][]int64, len(jobs))
for _, job := range jobs {
statuses[job.ID] = job.Status
for _, need := range job.Needs {
for _, v := range idToJobs[need] {
needs[job.ID] = append(needs[job.ID], v.ID)
}
}
}
return &jobStatusResolver{
statuses: statuses,
needs: needs,
}
}
func (r *jobStatusResolver) Resolve() map[int64]actions_model.Status {
ret := map[int64]actions_model.Status{}
for i := 0; i < len(r.statuses); i++ {
updated := r.resolve()
if len(updated) == 0 {
return ret
}
for k, v := range updated {
ret[k] = v
r.statuses[k] = v
}
}
return ret
}
func (r *jobStatusResolver) resolve() map[int64]actions_model.Status {
ret := map[int64]actions_model.Status{}
for id, status := range r.statuses {
if status != actions_model.StatusBlocked {
continue
}
allDone, allSucceed := true, true
for _, need := range r.needs[id] {
needStatus := r.statuses[need]
if !needStatus.IsDone() {
allDone = false
}
if needStatus.In(actions_model.StatusFailure, actions_model.StatusCancelled, actions_model.StatusSkipped) {
allSucceed = false
}
}
if allDone {
if allSucceed {
ret[id] = actions_model.StatusWaiting
} else {
ret[id] = actions_model.StatusSkipped
}
}
}
return ret
}