Add support for specifying the Slack channel ID to be included in the…

… payload (#607)

This is necessary with the changes in the slack-github-action v2, where it
expects the full payload to be passed to it, rather than having the channel ID
set separately.

README.md

@@ -32,6 +32,11 @@ Three different output formats are supplied, plain text, Markdown and for Slack.
     # Default: true
     chronological: ''
 
+    # Channel ID to include in the Slack payload
+    #
+    # Default: ''
+    slack channel: ''
+
     # Template for the message to be included before the list of changes to Slack.
     #
     # Supports Markdown and makes the following variables available:

action.yml

@@ -18,6 +18,9 @@ inputs:
   chronological:
     description: Output changes in chronological order
     default: true
+  slack channel:
+    description: Channel ID to include in the Slack message payload
+    default: ""
   slack template:
     description: |
       Message template to be used for line above the Slack output.

src/formatting.ts

@@ -72,7 +72,13 @@ export function getMarkdownFormat(commits: Commit[]): string {
   return lines.join('\n')
 }
 
-export function getSlackFormat(commits: Commit[], since: string, until: string, slackTemplate: string): string {
+export function getSlackFormat(
+  commits: Commit[],
+  since: string,
+  until: string,
+  slackTemplate: string,
+  slackChannel: string
+): string {
   const lines = []
 
   for (const commit of commits) {
@@ -101,6 +107,7 @@ export function getSlackFormat(commits: Commit[], since: string, until: string,
   const now = new Date()
 
   const result = {
+    channel: slackChannel,
     blocks: [
       {
         type: 'section',

src/main.ts

@@ -98,7 +98,10 @@ async function run(): Promise<void> {
 
   core.setOutput('plain-text', formatting.getPlainTextFormat(commits))
   core.setOutput('markdown', formatting.getMarkdownFormat(commits))
-  core.setOutput('slack', formatting.getSlackFormat(commits, since, until, core.getInput('slack template')))
+  core.setOutput(
+    'slack',
+    formatting.getSlackFormat(commits, since, until, core.getInput('slack template'), core.getInput('slack channel'))
+  )
 }
 
 run()