Update README.md/cmd/root.go with additional information (#523)
* Update README * Add notice about large image, add link to repo for `.actrc`
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README.md
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README.md
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# Overview [](https://github.com/nektos/act/actions) [](https://gitter.im/nektos/act?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge) [](https://goreportcard.com/report/github.com/nektos/act)
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> "Think globally, <code>act</code> locally"
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> "Think globally, `act` locally"
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Run your [GitHub Actions](https://developer.github.com/actions/) locally! Why would you want to do this? Two reasons:
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@ -50,7 +50,7 @@ or in a shell by running
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# Commands
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```
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```sh
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# Command structure:
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act [<event>] [options]
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If no event name passed, will default to "on: push"
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@ -77,9 +77,14 @@ act -n
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act -v
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```
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## First `act` run
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When running `act` for the first time, it will ask you to choose image to be used as default.
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It will save that information to `~/.actrc`, please refer to [Configuration](#configuration) for more information about `.actrc` and to [Runners](#runners) for information about used/available Docker images.
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# Flags
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```
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```none
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-a, --actor string user that triggered the event (default "nektos/act")
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-b, --bind bind working directory to container, rather than copy
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--defaultbranch string the name of the main branch
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@ -110,7 +115,7 @@ act -v
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MODULE_NOT_FOUND during `docker cp` command [#228](https://github.com/nektos/act/issues/228)
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```
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```yaml
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steps:
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- name: Checkout
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uses: actions/checkout@v2
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@ -120,22 +125,31 @@ steps:
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# Runners
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GitHub Actions offers managed [virtual environments](https://help.github.com/en/actions/reference/virtual-environments-for-github-hosted-runners) for running workflows. In order for `act` to run your workflows locally, it must run a container for the runner defined in your workflow file. Here are the images that `act` uses for each runner type:
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GitHub Actions offers managed [virtual environments](https://help.github.com/en/actions/reference/virtual-environments-for-github-hosted-runners) for running workflows. In order for `act` to run your workflows locally, it must run a container for the runner defined in your workflow file. Here are the images that `act` uses for each runner type and size:
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| GitHub Runner | Docker Image |
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| -------------- | ----------------------------------------------------------------- |
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| ubuntu-latest | [node:12.6-buster-slim](https://hub.docker.com/_/buildpack-deps) |
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| ubuntu-20.04 | [node:12.6-buster-slim](https://hub.docker.com/_/buildpack-deps) |
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| ubuntu-18.04 | [node:12.6-buster-slim](https://hub.docker.com/_/buildpack-deps) |
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| ubuntu-16.04 | [node:12.6-stretch-slim](https://hub.docker.com/_/buildpack-deps) |
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| windows-latest | `unsupported` |
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| windows-2019 | `unsupported` |
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| macos-latest | `unsupported` |
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| macos-10.15 | `unsupported` |
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| GitHub Runner | Micro Docker Image | Medium Docker Image | Large Docker Image |
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| -------------- | ------------------------------- | ---------------------------------------- | --------------------------------------------- |
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| ubuntu-latest | [node:12.6-buster-slim][micro] | [catthehacker/ubuntu:act-latest][medium] | [nektos/act-environments-ubuntu:18.04][large] |
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| ubuntu-20.04 | [node:12.6-buster-slim][micro] | [catthehacker/ubuntu:act-20.04][medium] | `unavailable` |
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| ubuntu-18.04 | [node:12.6-buster-slim][micro] | [catthehacker/ubuntu:act-18.04][medium] | [nektos/act-environments-ubuntu:18.04][large] |
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| ubuntu-16.04 | [node:12.6-stretch-slim][micro] | [catthehacker/ubuntu:act-16.04][medium] | `unavailable` |
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Below platforms are currently **unsupported and won't work** (see issue [#97])
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- `windows-latest`
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- `windows-2019`
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- `macos-latest`
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- `macos-10.15`
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[micro]: https://hub.docker.com/_/buildpack-deps
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[medium]: https://github.com/catthehacker/docker_images
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[large]: https://github.com/nektos/act-environments
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[#97]: https://github.com/nektos/act/issue/97
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## Default runners are intentionally incomplete
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These default images do **not** contain **all** the tools that GitHub Actions offers by default in their runners.
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Many things can work improperly or not at all while running those image.
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## Alternative runner images
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## Use an alternative runner image
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To use a different image for the runner, use the `-P` option:
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To use a different image for the runner, use the `-P` option.
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```sh
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act -P <platform>=<docker-image>
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```
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If your workflow uses `ubuntu-18.04`, consider below line as an example for changing Docker image used to run that workflow:
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```sh
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act -P ubuntu-18.04=nektos/act-environments-ubuntu:18.04
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```
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If you use multiple platforms in your workflow, you have to specify them to change which image is used.
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For example, if your workflow uses `ubuntu-18.04`, `ubuntu-16.04` and `ubuntu-latest`, specify all platforms like below
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```sh
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act -P ubuntu-18.04=nektos/act-environments-ubuntu:18.04 -P ubuntu-latest=ubuntu:latest -P ubuntu-16.04=node:12.6-buster-slim
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```
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# Secrets
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To run `act` with secrets, you can enter them interactively, supply them as environment variables or load them from a file. The following options are available for providing secrets:
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You can provide default configuration flags to `act` by either creating a `./.actrc` or a `~/.actrc` file. Any flags in the files will be applied before any flags provided directly on the command line. For example, a file like below will always use the `nektos/act-environments-ubuntu:18.04` image for the `ubuntu-latest` runner:
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```
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```sh
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# sample .actrc file
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-P ubuntu-18.04=nektos/act-environments-ubuntu:18.04
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-P ubuntu-latest=nektos/act-environments-ubuntu:18.04
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```
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Additionally, act supports loading environment variables from an `.env` file. The default is to look in the working directory for the file but can be overridden by:
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```
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```sh
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act --env-file my.env
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```
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`.env`:
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```
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```env
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MY_ENV_VAR=MY_ENV_VAR_VALUE
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MY_2ND_ENV_VAR="my 2nd env var value"
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```
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@ -200,7 +227,7 @@ don't want to run locally. E.g. a step that posts a Slack message or bumps a ver
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Every [GitHub event](https://developer.github.com/v3/activity/events/types) is accompanied by a payload. You can provide these events in JSON format with the `--eventpath` to simulate specific GitHub events kicking off an action. For example:
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```pull-request.json
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```json
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{
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"pull_request": {
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"head": {
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@ -213,7 +240,7 @@ Every [GitHub event](https://developer.github.com/v3/activity/events/types) is a
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}
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```
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```
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```sh
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act -e pull-request.json
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```
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@ -202,7 +202,7 @@ func newRunCommand(ctx context.Context, input *Input) func(*cobra.Command, []str
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if os.IsNotExist(err) {
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var answer string
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confirmation := &survey.Select{
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Message: "Please choose the default image you want to use with act:\n\n - Large size image: +20GB Docker image, includes almost all tools used on GitHub Actions\n - Medium size image: ~500MB, includes only necessary tools to bootstrap actions and aims to be compatible with all actions\n - Micro size image: <200MB, contains only NodeJS required to bootstrap actions, doesn't work with all actions\n\nDefault image and other options can be changed manually in ~/.actrc",
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Message: "Please choose the default image you want to use with act:\n\n - Large size image: +20GB Docker image, includes almost all tools used on GitHub Actions (only ubuntu-latest/ubuntu-18.04 platform is available)\n - Medium size image: ~500MB, includes only necessary tools to bootstrap actions and aims to be compatible with all actions\n - Micro size image: <200MB, contains only NodeJS required to bootstrap actions, doesn't work with all actions\n\nDefault image and other options can be changed manually in ~/.actrc (please refer to https://github.com/nektos/act#configuration for additional information about file structure)",
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Help: "If you want to know why act asks you that, please go to https://github.com/nektos/act/issues/107",
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Default: "Medium",
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Options: []string{"Large", "Medium", "Micro"},
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