From d3fd23cfb3f0c5571cdb38b4b847341281e4d7b9 Mon Sep 17 00:00:00 2001
From: Brandon Williams <135203+mbrandonw@users.noreply.github.com>
Date: Mon, 30 Sep 2024 13:13:35 -0400
Subject: [PATCH] Print runtime warning in previews. (#135)

* Print runtime warning in previews.

* Use legacy previews
---
 Examples/Examples/ExamplesApp.swift                        | 7 +++++++
 .../IssueReporters/RuntimeWarningReporter.swift            | 5 +++++
 2 files changed, 12 insertions(+)

diff --git a/Examples/Examples/ExamplesApp.swift b/Examples/Examples/ExamplesApp.swift
index 8467a29..ea6d03e 100644
--- a/Examples/Examples/ExamplesApp.swift
+++ b/Examples/Examples/ExamplesApp.swift
@@ -26,3 +26,10 @@ class ItemsModel {
     return lastItem
   }
 }
+
+struct Previews: PreviewProvider {
+  static var previews: some View {
+    let model = ItemsModel()
+    Text(model.lastItem?.description ?? "No last item")
+  }
+}
diff --git a/Sources/IssueReporting/IssueReporters/RuntimeWarningReporter.swift b/Sources/IssueReporting/IssueReporters/RuntimeWarningReporter.swift
index 9d95dda..e13aa2a 100644
--- a/Sources/IssueReporting/IssueReporters/RuntimeWarningReporter.swift
+++ b/Sources/IssueReporting/IssueReporters/RuntimeWarningReporter.swift
@@ -66,6 +66,11 @@ public struct _RuntimeWarningReporter: IssueReporter {
     column: UInt
   ) {
     #if canImport(os)
+    guard ProcessInfo.processInfo.environment["XCODE_RUNNING_FOR_PREVIEWS"] != "1"
+    else {
+      print("🟣 \(fileID):\(line): \(message() ?? "")")
+      return
+    }
       let moduleName = String(
         Substring("\(fileID)".utf8.prefix(while: { $0 != UTF8.CodeUnit(ascii: "/") }))
       )