Slack

Posts a message to Slack. You must provide either a bot or a personal token with the following scopes set:

channels:join
chat:write
chat:write.public
1. Log into the target Slack workspace.
2. Create a Slack app.
3. Click on Incoming Webhooks.
4. Create a new webhook.
5. Copy the generated webhook URL.

Webhooks are not protected, anyone with access to the webhook URI can send messages to the target room. Prefer setting the JRELEASER_SLACK_WEBHOOK environment variable over explicitly setting a value in the configuration DSL.

Configuration

Legend:

required
optional
may use environment variable
accepts Name Templates

YAML
TOML
JSON
Maven
Gradle

# 
announce:
  # 
  slack:
    # Enables or disables Slack.
    # Supported values are [`NEVER`, `ALWAYS`, `RELEASE`, `SNAPSHOT`].
    # Defaults to `NEVER`.
    #  
    active: ALWAYS

    # Defines the connection timeout in seconds.
    # Defaults to `20`.
    # 
    connectTimeout: 20

    # Defines the read timeout in seconds.
    # Defaults to `60`.
    # 
    readTimeout: 60

    # Additional properties used when evaluating templates.
    #  
    extraProperties:
      # Key will be capitalized and prefixed with `slack`, i.e, `slackFoo`.
      foo: bar

    # The ApiKey associated with the given account.
    #  
    token: __USE_ENVIRONMENT_VARIABLE__

    # The webhook associated with a specific Slack channel.
    #  
    webhook: __USE_ENVIRONMENT_VARIABLE__

    # The channel where the message will be sent to
    # Defaults to `#announce`.
    # 
    channel: '#announce'

    # The announcement message.
    # Review the available Name Templates.
    #  
    message: '🚀 {{projectNameCapitalized}} {{projectVersion}} has been released! {{releaseNotesUrl}}'

    # Path to a template file that contains the message.
    # Review the available Name Templates.
    # Defaults to `src/jreleaser/templates/slack.tpl`.
    # 
    messageTemplate: path/to/template/slack.tpl

# 
[announce.slack]
  # Enables or disables Slack.
  # Supported values are [`NEVER`, `ALWAYS`, `RELEASE`, `SNAPSHOT`].
  # Defaults to `NEVER`.
  #  
  active = "ALWAYS"

  # Defines the connection timeout in seconds.
  # Defaults to `20`.
  # 
  connectTimeout = 20

  # Defines the read timeout in seconds.
  # Defaults to `60`.
  # 
  readTimeout = 60

  # Additional properties used when evaluating templates.
  #  
  extraProperties.foo = "bar"
  # Key will be capitalized and prefixed with `slack`, i.e, `slackFoo`.

  # The ApiKey associated with the given account.
  #  
  token = "__USE_ENVIRONMENT_VARIABLE__"

  # The webhook associated with a specific Slack channel.
  #  
  webhook = "__USE_ENVIRONMENT_VARIABLE__"

  # The channel where the message will be sent to
  # Defaults to `#announce`.
  # 
  channel = "#announce"

  # The announcement message.
  # Review the available Name Templates.
  #  
  message = "🚀 {{projectNameCapitalized}} {{projectVersion}} has been released! {{releaseNotesUrl}}"

  # Path to a template file that contains the message.
  # Review the available Name Templates.
  # Defaults to `src/jreleaser/templates/slack.tpl`.
  # 
  messageTemplate = "path/to/template/slack.tpl"

{
  // 
  "announce": {
    // 
    "slack": {
      // Enables or disables Slack.
      // Supported values are [`NEVER`, `ALWAYS`, `RELEASE`, `SNAPSHOT`].
      // Defaults to `NEVER`.
      //  
      "active": "ALWAYS",

      // Defines the connection timeout in seconds.
      // Defaults to `20`.
      // 
      "connectTimeout": 20,

      // Defines the read timeout in seconds.
      // Defaults to `60`.
      // 
      "readTimeout": 60,

      // Additional properties used when evaluating templates.
      //  
      "extraProperties": {
        // Key will be capitalized and prefixed with `slack`, i.e, `slackFoo`.
        "foo": "bar"
      },

      // The ApiKey associated with the given account.
      //  
      "token": "__USE_ENVIRONMENT_VARIABLE__",

      // The webhook associated with a specific Slack channel.
      //  
      "webhook": "__USE_ENVIRONMENT_VARIABLE__",

      // The channel where the message will be sent to
      // Defaults to `#announce`.
      // 
      "channel": "#announce",

      // The announcement message.
      // Review the available Name Templates.
      //  
      "message": "🚀 {{projectNameCapitalized}} {{projectVersion}} has been released! {{releaseNotesUrl}}",

      // Path to a template file that contains the message.
      // Review the available Name Templates.
      // Defaults to `src/jreleaser/templates/slack.tpl`.
      // 
      "messageTemplate": "path/to/template/slack.tpl"
    }
  }
}

<jreleaser>
  <!--
    
  -->
  <announce>
    <!--
      
    -->
    <slack>
      <!--
        Enables or disables Slack.
        Supported values are [`NEVER`, `ALWAYS`, `RELEASE`, `SNAPSHOT`].
        Defaults to `NEVER`.
         
      -->
      <active>ALWAYS</active>

      <!--
        Defines the connection timeout in seconds.
        Defaults to `20`.
        
      -->
      <connectTimeout>20</connectTimeout>

      <!--
        Defines the read timeout in seconds.
        Defaults to `60`.
        
      -->
      <readTimeout>60</readTimeout>

      <!--
        Additional properties used when evaluating templates.
         
      -->
      <extraProperties>
        <!--
          Key will be capitalized and prefixed with `slack`, i.e, `slackFoo`.
        -->
        <foo>bar</foo>
      </extraProperties>

      <!--
        The ApiKey associated with the given account.
         
      -->
      <token>__USE_ENVIRONMENT_VARIABLE__</token>

      <!--
        The webhook associated with a specific Slack channel.
         
      -->
      <webhook>__USE_ENVIRONMENT_VARIABLE__</webhook>

      <!--
        The channel where the message will be sent to
        Defaults to `#announce`.
        
      -->
      <channel>#announce</channel>

      <!--
        The announcement message.
        Review the available Name Templates.
         
      -->
      <message>🚀 {{projectNameCapitalized}} {{projectVersion}} has been released! {{releaseNotesUrl}}</message>

      <!--
        Path to a template file that contains the message.
        Review the available Name Templates.
        Defaults to `src/jreleaser/templates/slack.tpl`.
        
      -->
      <messageTemplate>path/to/template/slack.tpl</messageTemplate>
    </slack>
  </announce>
</jreleaser>

jreleaser {
  // 
  announce {
    // 
    slack {
      // Enables or disables Slack.
      // Supported values are [`NEVER`, `ALWAYS`, `RELEASE`, `SNAPSHOT`].
      // Defaults to `NEVER`.
      //  
      active = 'ALWAYS'

      // Defines the connection timeout in seconds.
      // Defaults to `20`.
      // 
      connectTimeout = 20

      // Defines the read timeout in seconds.
      // Defaults to `60`.
      // 
      readTimeout = 60

      // Additional properties used when evaluating templates.
      // Key will be capitalized and prefixed with `slack`, i.e, `slackFoo`.
      //  
      extraProperties.put('foo', 'bar')

      // The ApiKey associated with the given account.
      //  
      token = '__USE_ENVIRONMENT_VARIABLE__'

      // The webhook associated with a specific Slack channel.
      //  
      webhook = '__USE_ENVIRONMENT_VARIABLE__'

      // The channel where the message will be sent to
      // Defaults to `#announce`.
      // 
      channel = '#announce'

      // The announcement message.
      // Review the available Name Templates.
      //  
      message = '🚀 {{projectNameCapitalized}} {{projectVersion}} has been released! {{releaseNotesUrl}}'

      // Path to a template file that contains the message.
      // Review the available Name Templates.
      // Defaults to `src/jreleaser/templates/slack.tpl`.
      // 
      messageTemplate = 'path/to/template/slack.tpl'
    }
  }
}

You may define either message or messageTemplate, with the former taking precedence over the latter.

Environment

When not explicitly set, the value of the following properties may be resolved from an environment variable or a system property as shown in the table. The system property takes precedence over the environment variable.

System Property	Environment Variable
active
jreleaser.announce.slack.active	JRELEASER_ANNOUNCE_SLACK_ACTIVE
token
jreleaser.announce.slack.token jreleaser.slack.token	JRELEASER_ANNOUNCE_SLACK_TOKEN JRELEASER_SLACK_TOKEN
webhook
jreleaser.announce.slack.webhook jreleaser.slack.webhook	JRELEASER_ANNOUNCE_SLACK_WEBHOOK JRELEASER_SLACK_WEBHOOK

System Property

Environment Variable

active

jreleaser.announce.slack.active

JRELEASER_ANNOUNCE_SLACK_ACTIVE

token

jreleaser.announce.slack.token
jreleaser.slack.token

JRELEASER_ANNOUNCE_SLACK_TOKEN
JRELEASER_SLACK_TOKEN

webhook

jreleaser.announce.slack.webhook
jreleaser.slack.webhook

JRELEASER_ANNOUNCE_SLACK_WEBHOOK
JRELEASER_SLACK_WEBHOOK