mirror of https://github.com/go-gitea/gitea.git
172 lines
5.8 KiB
Markdown
172 lines
5.8 KiB
Markdown
---
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date: "2023-04-27T15:00:00+08:00"
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title: "Compared to GitHub Actions"
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slug: "comparison"
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weight: 30
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draft: false
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toc: false
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menu:
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sidebar:
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parent: "actions"
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name: "Comparison"
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weight: 30
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identifier: "actions-comparison"
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---
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# Compared to GitHub Actions
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Even though Gitea Actions is designed to be compatible with GitHub Actions, there are some differences between them.
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**Table of Contents**
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{{< toc >}}
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## Additional features
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### Absolute action URLs
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Gitea Actions supports defining actions via absolute URL, which means that you can use actions from any git repository.
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Like `uses: https://github.com/actions/checkout@v3` or `uses: http://your_gitea.com/owner/repo@branch`.
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### Actions written in Go
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Gitea Actions supports writing actions in Go.
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See [Creating Go Actions](https://blog.gitea.io/2023/04/creating-go-actions/).
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## Unsupported workflows syntax
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### `concurrency`
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It's used to run a single job at a time.
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See [Using concurrency](https://docs.github.com/en/actions/using-jobs/using-concurrency).
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It's ignored by Gitea Actions now.
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### `run-name`
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The name for workflow runs generated from the workflow.
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See [Workflow syntax for GitHub Actions](https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#run-name).
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It's ignored by Gitea Actions now.
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### `permissions` and `jobs.<job_id>.permissions`
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See [Workflow syntax for GitHub Actions](https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#permissions).
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It's ignored by Gitea Actions now.
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### `jobs.<job_id>.timeout-minutes`
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See [Workflow syntax for GitHub Actions](https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idtimeout-minutes).
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It's ignored by Gitea Actions now.
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### `jobs.<job_id>.continue-on-error`
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See [Workflow syntax for GitHub Actions](https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idcontinue-on-error).
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It's ignored by Gitea Actions now.
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### `jobs.<job_id>.environment`
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See [Workflow syntax for GitHub Actions](https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idenvironment).
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It's ignored by Gitea Actions now.
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### Complex `runs-on`
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See [Workflow syntax for GitHub Actions](https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idruns-on).
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Gitea Actions only supports `runs-on: xyz` or `runs-on: [xyz]` now.
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### `workflow_dispatch`
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See [Workflow syntax for GitHub Actions](https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#onworkflow_dispatch).
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It's ignored by Gitea Actions now.
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### `hashFiles` expression
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See [Expressions](https://docs.github.com/en/actions/learn-github-actions/expressions#hashfiles)
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Gitea Actions doesn't support it now, if you use it, the result will always be empty string.
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As a workaround, you can use [go-hashfiles](https://gitea.com/actions/go-hashfiles) instead.
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## Missing features
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### Variables
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See [Variables](https://docs.github.com/en/actions/learn-github-actions/variables).
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It's under development.
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### Problem Matchers
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Problem Matchers are a way to scan the output of actions for a specified regex pattern and surface that information prominently in the UI.
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See [Problem matchers](https://github.com/actions/toolkit/blob/main/docs/problem-matchers.md).
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It's ignored by Gitea Actions now.
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### Create an error annotation
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See [Creating an annotation for an error](https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#example-creating-an-annotation-for-an-error)
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It's ignored by Gitea Actions now.
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## Missing UI features
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### Pre and Post steps
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Pre and Post steps don't have their own section in the job log user interface.
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## Different behavior
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### Downloading actions
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Gitea Actions doesn't download actions from GitHub by default.
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"By default" means that you don't specify the host in the `uses` field, like `uses: actions/checkout@v3`.
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As a contrast, `uses: https://github.com/actions/checkout@v3` has specified host.
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The missing host will be filled with `https://gitea.com` if you don't configure it.
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That means `uses: actions/checkout@v3` will download the action from [gitea.com/actions/checkout](https://gitea.com/actions/checkout), instead of [github.com/actions/checkout](https://github.com/actions/checkout).
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As mentioned, it's configurable.
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If you want your runners to download actions from GitHub or your own Gitea instance by default, you can configure it by setting `[actions].DEFAULT_ACTIONS_URL`. See [Configuration Cheat Sheet]({{< relref "doc/administration/config-cheat-sheet.en-us.md#actions-actions" >}}).
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### Context availability
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Context availability is not checked, so you can use the env context on more places.
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See [Context availability](https://docs.github.com/en/actions/learn-github-actions/contexts#context-availability).
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## Known issues
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### `docker/build-push-action@v4`
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See [act_runner#119](https://gitea.com/gitea/act_runner/issues/119#issuecomment-738294).
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`ACTIONS_RUNTIME_TOKEN` is a random string in Gitea Actions, not a JWT.
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But the `docker/build-push-action@v4` tries to parse the token as JWT and doesn't handle the error, so the job fails.
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There are two workarounds:
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Set the `ACTIONS_RUNTIME_TOKEN` to empty manually, like:
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``` yml
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- name: Build and push
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uses: docker/build-push-action@v4
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env:
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ACTIONS_RUNTIME_TOKEN: ''
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with:
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...
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```
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The bug has been fixed in a newer [commit](https://gitea.com/docker/build-push-action/commit/d8823bfaed2a82c6f5d4799a2f8e86173c461aba?style=split&whitespace=show-all#diff-1af9a5bdf96ddff3a2f3427ed520b7005e9564ad), but it has not been released. So you could use the latest version by specifying the branch name, like:
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``` yml
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- name: Build and push
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uses: docker/build-push-action@master
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with:
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...
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```
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