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# Plugins
Each [release step](../../README.md#release-steps) is implemented within a plugin or a list of plugins that can be configured. This allows for support of different [commit message formats](../../README.md#commit-message-format), release note generators and publishing platforms.
## Plugin types
### verifyConditions plugin
Responsible for verifying conditions necessary to proceed with the release: configuration is correct, authentication token are valid, etc...
Default implementation: [npm](https://github.com/semantic-release/npm#verifyconditions) and [github](https://github.com/semantic-release/github#verifyconditions).
### analyzeCommits plugin
Responsible for determining the type of the next release (`major`, `minor` or `patch`).
Default implementation: [@semantic-release/commit-analyzer](https://github.com/semantic-release/commit-analyzer).
### verifyRelease plugin
Responsible for verifying the parameters (version, type, dist-tag etc...) of the release that is about to be published match certain expectations. For example the [cracks plugin](https://github.com/semantic-release/cracks) is able to verify that if a release contains breaking changes, its type must be `major`.
Default implementation: none.
### generateNotes plugin
Responsible for generating release notes.
Default implementation: [@semantic-release/release-notes-generator](https://github.com/semantic-release/release-notes-generator).
### prepare plugin
Responsible for preparing the release, including:
- Creating or updating files such as `package.json`, `CHANGELOG.md`, documentation or compiled assets.
- Create and push commits
Default implementation: [npm](https://github.com/semantic-release/npm#prepare).
### publish plugin
Responsible for publishing the release.
Default implementation: [npm](https://github.com/semantic-release/npm#publish) and [github](https://github.com/semantic-release/github#publish).
### success plugin
Responsible for notifying of a new release.
Default implementation: [github](https://github.com/semantic-release/github#success).
### fail plugin
Responsible for notifying of a failed release.
Default implementation: [github](https://github.com/semantic-release/github#fail).
## Configuration
Plugin can be configured by specifying the plugin's module name or file path directly as a `String` or within the `path` key of an `Object`.
Plugins specific options can be set similarly to the other **semantic-release** [options](configuration.md#options) or within the plugin `Object`. Plugins options defined along with the other **semantic-release** [options](configuration.md#options) will apply to all plugins. Options defined within the plugin `Object` will apply to that specific plugin.
For example:
```json
{
"release": {
"verifyConditions": [
{
"path": "@semantic-release/exec",
"cmd": "verify-conditions.sh"
},
"@semantic-release/npm",
"@semantic-release/github"
],
"analyzeCommits": "custom-plugin",
"verifyRelease": [
{
"path": "@semantic-release/exec",
"cmd": "verify-release.sh"
},
],
"generateNotes": "./build/my-plugin.js",
"githubUrl": "https://my-ghe.com",
"githubApiPathPrefix": "/api-prefix"
}
}
```
With this configuration:
- the `custom-plugin` npm module will be used to [analyze commits](#analyzecommits-plugin)
- the `./build/my-plugin.js` script will be used to [generate release notes](#generatenotes-plugin)
- the [`@semantic-release/exec`](https://github.com/semantic-release/exec), [`@semantic-release/npm`](https://github.com/semantic-release/npm) and [`@semantic-release/exec`](https://github.com/semantic-release/exec) plugins will be used to [verify conditions](#verifyconditions-plugin)
- the [`@semantic-release/exec`](https://github.com/semantic-release/exec) plugin will be used to [verify the release](#verifyrelease-plugin)
- the `cmd` option will be set to `verify-conditions.sh` only for the [`@semantic-release/exec`](https://github.com/semantic-release/exec) plugin used to [verify conditions](#verifyconditions-plugin)
- the `cmd` option will be set to `verify-release.sh` only for the [`@semantic-release/exec`](https://github.com/semantic-release/exec) plugin used to [verify the release](#verifyrelease-plugin)
- the `githubUrl` and `githubApiPathPrefix` options will be set to respectively `https://my-ghe.com` and `/api-prefix` for all plugins