Comment Bluesky post links on merged PRs

.github/workflows/process.yml

@@ -8,6 +8,7 @@ on:
 
 permissions:
   contents: write
+  pull-requests: write
 
 concurrency:
   group: process-json-${{ github.ref }}
@@ -54,12 +55,34 @@ jobs:
         env:
           BLUESKY_IDENTIFIER_NODEJS_ORG: nodejs.org
           BLUESKY_APP_PASSWORD_NODEJS_ORG: ${{ secrets.BLUESKY_APP_PASSWORD_NODEJS_ORG }}
+          POST_URLS_FILE: ${{ runner.temp }}/bluesky-post-urls.txt
         run: |
+          : > "$POST_URLS_FILE"
           for file in ${{ steps.find-json.outputs.NEW_JSON_FILES }}; do
             echo "Processing $file..."
             node actions/process.js "$file"
           done
 
+      # Comment browsable bsky.app links on the merged PR (nodejs/bluesky#9).
+      - name: Comment post links on the PR
+        if: steps.find-json.outputs.NEW_JSON_FILES
+        env:
+          GH_TOKEN: ${{ github.token }}
+          POST_URLS_FILE: ${{ runner.temp }}/bluesky-post-urls.txt
+        run: |
+          if [ ! -s "$POST_URLS_FILE" ]; then
+            echo "No post URLs to comment"
+            exit 0
+          fi
+          {
+            echo "Posted to Bluesky:"
+            echo
+            while IFS= read -r url; do
+              [ -n "$url" ] && echo "- $url"
+            done < "$POST_URLS_FILE"
+          } > "${{ runner.temp }}/pr-comment.md"
+          gh pr comment "${{ github.event.pull_request.number }}" --body-file "${{ runner.temp }}/pr-comment.md"
+
       - name: Commit and push changes
         if: steps.find-json.outputs.NEW_JSON_FILES
         run: |

actions/process.js

@@ -4,7 +4,7 @@ import fs from 'node:fs';
 import assert from 'node:assert';
 import process from 'node:process';
 import path from 'node:path';
-import { post, maybeUpdateReplyInThread } from './lib/posts.js';
+import { post, maybeUpdateReplyInThread, getPostURLFromURI } from './lib/posts.js';
 
 // This script takes a path to a JSON with the pattern $base_path/new/$any_name.json,
 // where $any_name can be anything, and then performs the action specified in it.
@@ -13,6 +13,34 @@ import { post, maybeUpdateReplyInThread } from './lib/posts.js';
 // starting from 0 based on the number of existing JSONs processed on the same date
 // and already in the processed directory.
 
+/**
+ * Resolve a browsable bsky.app URL for the performed action.
+ * Reposts create `app.bsky.feed.repost` records (not /post/ URLs), so link the
+ * original post instead.
+ * @param {import('@atproto/api').AtpAgent} agent
+ * @param {{ action: string, repostURL?: string }} request
+ * @param {{ uri: string }} result
+ */
+async function getPublicPostURL(agent, request, result) {
+  if (request.action === 'repost') {
+    return request.repostURL;
+  }
+  return getPostURLFromURI(agent, result.uri);
+}
+
+/**
+ * When POST_URLS_FILE is set (GitHub Actions), append URLs so the workflow can
+ * comment them on the merged PR.
+ * @param {string} postURL
+ */
+function appendPostURLForPRComment(postURL) {
+  const urlsFile = process.env.POST_URLS_FILE;
+  if (!urlsFile) {
+    return;
+  }
+  fs.appendFileSync(urlsFile, `${postURL}\n`);
+}
+
 assert(process.argv[2], `Usage: node process.js $base_path/new/$any_name.json`);
 const { agent, requests, requestFilePath, richTextFile } = await import('./login-and-validate.js');
 
@@ -47,6 +75,10 @@ for (const request of requests) {
       assert.fail('Unknown action ' + request.action);
   }
   console.log('Result', result);
+  const postURL = await getPublicPostURL(agent, request, result);
+  console.log('Post URL', postURL);
+  result.postURL = postURL;
+  appendPostURLForPRComment(postURL);
   // Extend the result to be written to the processed JSON file.
   request.result = result;
   previousPostInfo = {