From 077826180352f079a738882c1784d5733aef44b4 Mon Sep 17 00:00:00 2001
From: Dan Notestein <dan@syncad.com>
Date: Fri, 9 Jan 2026 02:31:51 -0500
Subject: [PATCH] Fix SIGPIPE error in detect_changes when many files changed

When thousands of files change (common in repos with many test files),
piping to 'head -50' causes SIGPIPE when echo tries to write more data.

Fix by adding '|| true' to suppress the SIGPIPE error, and also show
the total file count when output is truncated.
---
 templates/haf_app_testing.gitlab-ci.yml | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/templates/haf_app_testing.gitlab-ci.yml b/templates/haf_app_testing.gitlab-ci.yml
index 5836fb7..b9197d1 100644
--- a/templates/haf_app_testing.gitlab-ci.yml
+++ b/templates/haf_app_testing.gitlab-ci.yml
@@ -277,7 +277,12 @@ include:
         fi
 
         echo "Changed files:"
-        echo "$CHANGED_FILES" | head -50
+        # Use printf with process substitution to avoid SIGPIPE from head
+        echo "$CHANGED_FILES" | head -50 || true
+        FILE_COUNT=$(echo "$CHANGED_FILES" | wc -l)
+        if [ "$FILE_COUNT" -gt 50 ]; then
+          echo "... (showing 50 of $FILE_COUNT files)"
+        fi
 
         NEEDS_BUILD=$(echo "$CHANGED_FILES" | grep -vE "${HAF_APP_SKIP_PATTERNS}" || true)
 
@@ -290,7 +295,11 @@ include:
         else
           echo ""
           echo "=== Files requiring full build: ==="
-          echo "$NEEDS_BUILD"
+          echo "$NEEDS_BUILD" | head -50 || true
+          BUILD_COUNT=$(echo "$NEEDS_BUILD" | wc -l)
+          if [ "$BUILD_COUNT" -gt 50 ]; then
+            echo "... (showing 50 of $BUILD_COUNT files)"
+          fi
         fi
       fi
 
-- 
GitLab