Show step summary after running script

Author: neilvcarvalho

exe/importmap-update

@@ -105,6 +105,29 @@ report.outcomes.each do |o|
 end
 report.warnings.each { |w| warn "  ! #{w}" }
 
+if (summary_path = ENV["GITHUB_STEP_SUMMARY"])
+  File.open(summary_path, "a") do |f|
+    f.puts "### Update summary"
+    f.puts ""
+    f.puts "Dry run: #{options[:dry_run]}"
+    f.puts ""
+    if plan.warnings.any?
+      f.puts "**Plan warnings:**"
+      f.puts ""
+      plan.warnings.each { |w| f.puts "- #{w}" }
+      f.puts ""
+    end
+    f.puts "Reconciler ignored #{reconciled.ignored.size} foreign PR(s)."
+    f.puts ""
+    f.puts "| Branch | PR | Action | Status | Detail |"
+    f.puts "| --- | --- | --- | --- | --- |"
+    report.outcomes.each do |o|
+      f.puts "| #{o.branch || "?"} | #{o.pr_number ? "##{o.pr_number}" : ""} | #{o.type} | #{o.status} | #{o.detail} |"
+    end
+    report.warnings.each { |w| f.puts "> [!WARNING]" ; f.puts "> #{w}" }
+  end
+end
+
 # Exit non-zero only if any non-skipped outcome failed; in dry run all are
 # skipped, which is a successful run.
 exit(report.outcomes.any?(&:failed?) ? 1 : 0)