Add a CI step that comments on PRs included in a new release (#108)

.github/workflows/main.yml

@@ -186,3 +186,7 @@ jobs:
           prerelease: ${{ contains(env.TAG, 'rc') }}
           files: |
             dist/*
+
+      - name: Add PR comments on release
+        run: |
+          ./scripts/add_pr_comments_on_release.sh

scripts/add_pr_comments_on_release.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+set -e
+
+repo_url=https://github.com/allenai/beaker-gantry
+tags=$(git tag -l --sort=-version:refname 'v*' | head -n 2)
+current_tag=$(echo "$tags" | head -n 1)
+last_tag=$(echo "$tags" | tail -n 1)
+
+echo "Current release: $current_tag"
+echo "Last release: $last_tag"
+
+if [ -z "$last_tag" ]; then
+    echo "No previous release, nothing to do"
+    exit 0;
+fi
+
+commits_since_last_release=$(git log "${last_tag}..${current_tag}" --format=format:%H)
+
+echo "Commits/PRs since last release:"
+for commit in $commits_since_last_release; do
+    pr_number=$(gh pr list --search "$commit" --state merged --json number --jq '.[].number')
+    if [ -z "$pr_number" ]; then
+        echo "$commit"
+    else
+        echo "$commit (PR #$pr_number)"
+        gh pr comment "$pr_number" --body "This PR has been released in [${current_tag}](${repo_url}/releases/tag/${current_tag})."
+    fi
+done