Add Block Kit support

README.md

@@ -89,6 +89,29 @@ steps:
     - emoji: ":bitrise:"
 ```
 
+#### Using Block Kit
+
+Please check the format guideline [https://api.slack.com/methods/chat.postMessage#arg_blocks](https://api.slack.com/methods/chat.postMessage#arg_blocks)
+
+```yaml
+steps:
+- slack:
+    title: Notify team
+    inputs:
+    - workspace_slack_integration_id: example
+    - message: This is a test notification, please ignore
+    - blocks: |-
+            [
+                {
+                    "type": "section",
+                    "text": {
+                        "type": "plain_text",
+                        "text": "Hello world"
+                    }
+                }
+            ]
+
+```
 
 ## ⚙️ Configuration
 

main.go

@@ -31,6 +31,7 @@ type Input struct {
 	Channel               string          `env:"channel"`
 	ChannelOnError        string          `env:"channel_on_error"`
 	Text                  string          `env:"text"`
+	Blocks                string          `env:"blocks"`
 	TextOnError           string          `env:"text_on_error"`
 	IconEmoji             string          `env:"emoji"`
 	IconEmojiOnError      string          `env:"emoji_on_error"`
@@ -93,6 +94,9 @@ type config struct {
 	ReplyBroadcast bool
 	LinkNames      bool `env:"link_names,opt[yes,no]"`
 
+	// Blocks
+	Blocks string
+
 	// Attachment
 	Color      string
 	PreText    string
@@ -121,6 +125,7 @@ func newMessage(c config) Message {
 	msg := Message{
 		Channel: strings.TrimSpace(c.Channel),
 		Text:    c.Text,
+		Blocks:  c.Blocks,
 		Attachments: []Attachment{{
 			Fallback:   ensureNewlines(c.Message),
 			Color:      c.Color,
@@ -297,6 +302,7 @@ func parseInputIntoConfig(inp *Input) (config, error) {
 		WebhookURL:                 webhookURL,
 		Channel:                    selectValue(inp.Channel, inp.ChannelOnError),
 		Text:                       selectValue(inp.Text, inp.TextOnError),
+		Blocks:                     inp.Blocks,
 		IconEmoji:                  selectValue(inp.IconEmoji, inp.IconEmojiOnError),
 		IconURL:                    selectValue(inp.IconURL, inp.IconURLOnError),
 		Username:                   selectValue(inp.Username, inp.UsernameOnError),

message.go

@@ -16,6 +16,9 @@ type Message struct {
 	// Text of the message to send. Required, unless providing only attachments instead.
 	Text string `json:"text,omitempty"`
 
+	// Block Kit payload to send.
+	Blocks string `json:"blocks,omitempty"`
+
 	// Attachments is a list of structured attachments.
 	Attachments []Attachment `json:"attachments,omitempty"`
 

step.yml

@@ -132,6 +132,11 @@ inputs:
       description: |
         Text of the message to send.
         Required unless you wish to send attachments only.
+  - blocks:
+    opts:
+      title: "Block Kit payload"
+      description: |
+        Payload of Block Kit to send. Please check the format guideline [https://api.slack.com/methods/chat.postMessage#arg_blocks](https://api.slack.com/methods/chat.postMessage#arg_blocks)
   - text_on_error:
     opts:
       title: "Text of the message if the build failed"