forgejo/modules/actions/log.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

163 lines
4.1 KiB
Go

// Copyright 2022 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package actions
import (
"bufio"
"context"
"fmt"
"io"
"os"
"strings"
"time"
"code.gitea.io/gitea/models/dbfs"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/storage"
runnerv1 "code.gitea.io/actions-proto-go/runner/v1"
"google.golang.org/protobuf/types/known/timestamppb"
)
const (
MaxLineSize = 64 * 1024
DBFSPrefix = "actions_log/"
timeFormat = "2006-01-02T15:04:05.0000000Z07:00"
defaultBufSize = MaxLineSize
)
func WriteLogs(ctx context.Context, filename string, offset int64, rows []*runnerv1.LogRow) ([]int, error) {
name := DBFSPrefix + filename
f, err := dbfs.OpenFile(ctx, name, os.O_WRONLY|os.O_CREATE)
if err != nil {
return nil, fmt.Errorf("dbfs OpenFile %q: %w", name, err)
}
defer f.Close()
if _, err := f.Seek(offset, io.SeekStart); err != nil {
return nil, fmt.Errorf("dbfs Seek %q: %w", name, err)
}
writer := bufio.NewWriterSize(f, defaultBufSize)
ns := make([]int, 0, len(rows))
for _, row := range rows {
n, err := writer.WriteString(FormatLog(row.Time.AsTime(), row.Content) + "\n")
if err != nil {
return nil, err
}
ns = append(ns, n)
}
if err := writer.Flush(); err != nil {
return nil, err
}
return ns, nil
}
func ReadLogs(ctx context.Context, inStorage bool, filename string, offset, limit int64) ([]*runnerv1.LogRow, error) {
f, err := openLogs(ctx, inStorage, filename)
if err != nil {
return nil, err
}
defer f.Close()
if _, err := f.Seek(offset, io.SeekStart); err != nil {
return nil, fmt.Errorf("file seek: %w", err)
}
scanner := bufio.NewScanner(f)
maxLineSize := len(timeFormat) + MaxLineSize + 1
scanner.Buffer(make([]byte, maxLineSize), maxLineSize)
var rows []*runnerv1.LogRow
for scanner.Scan() && (int64(len(rows)) < limit || limit < 0) {
t, c, err := ParseLog(scanner.Text())
if err != nil {
return nil, fmt.Errorf("parse log %q: %w", scanner.Text(), err)
}
rows = append(rows, &runnerv1.LogRow{
Time: timestamppb.New(t),
Content: c,
})
}
if err := scanner.Err(); err != nil {
return nil, fmt.Errorf("scan: %w", err)
}
return rows, nil
}
func TransferLogs(ctx context.Context, filename string) (func(), error) {
name := DBFSPrefix + filename
remove := func() {
if err := dbfs.Remove(ctx, name); err != nil {
log.Warn("dbfs remove %q: %v", name, err)
}
}
f, err := dbfs.Open(ctx, name)
if err != nil {
return nil, fmt.Errorf("dbfs open %q: %w", name, err)
}
defer f.Close()
if _, err := storage.Actions.Save(filename, f, -1); err != nil {
return nil, fmt.Errorf("storage save %q: %w", filename, err)
}
return remove, nil
}
func RemoveLogs(ctx context.Context, inStorage bool, filename string) error {
if !inStorage {
name := DBFSPrefix + filename
err := dbfs.Remove(ctx, name)
if err != nil {
return fmt.Errorf("dbfs remove %q: %w", name, err)
}
return nil
}
err := storage.Actions.Delete(filename)
if err != nil {
return fmt.Errorf("storage delete %q: %w", filename, err)
}
return nil
}
func openLogs(ctx context.Context, inStorage bool, filename string) (io.ReadSeekCloser, error) {
if !inStorage {
name := DBFSPrefix + filename
f, err := dbfs.Open(ctx, name)
if err != nil {
return nil, fmt.Errorf("dbfs open %q: %w", name, err)
}
return f, nil
}
f, err := storage.Actions.Open(filename)
if err != nil {
return nil, fmt.Errorf("storage open %q: %w", filename, err)
}
return f, nil
}
func FormatLog(timestamp time.Time, content string) string {
// Content shouldn't contain new line, it will break log indexes, other control chars are safe.
content = strings.ReplaceAll(content, "\n", `\n`)
if len(content) > MaxLineSize {
content = content[:MaxLineSize]
}
return fmt.Sprintf("%s %s", timestamp.UTC().Format(timeFormat), content)
}
func ParseLog(in string) (time.Time, string, error) {
index := strings.IndexRune(in, ' ')
if index < 0 {
return time.Time{}, "", fmt.Errorf("invalid log: %q", in)
}
timestamp, err := time.Parse(timeFormat, in[:index])
if err != nil {
return time.Time{}, "", err
}
return timestamp, in[index+1:], nil
}