Initial commit

scripts/generate-diff.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+# Required env vars: (none)
+# Optional env vars: PREV_SHA (if set, generates an incremental diff from that commit)
+set -euo pipefail
+
+git fetch origin main --depth=100
+
+if [ -n "${PREV_SHA:-}" ] && git cat-file -e "${PREV_SHA}^{commit}" 2>/dev/null; then
+  echo "Generating incremental diff from ${PREV_SHA} to HEAD"
+  git diff "${PREV_SHA}...HEAD" > pr.diff
+  echo "incremental=true" >> "$GITHUB_OUTPUT"
+else
+  echo "Generating full diff from origin/main to HEAD"
+  git diff origin/main...HEAD > pr.diff
+  echo "incremental=false" >> "$GITHUB_OUTPUT"
+fi
+
+DIFF_SIZE=$(wc -c < pr.diff)
+echo "Diff size: ${DIFF_SIZE} bytes"
+
+if [ "$DIFF_SIZE" -gt 12288 ]; then
+  head -c 12288 pr.diff > pr_truncated.diff
+  printf '\n\n[... diff truncated due to size ...]' >> pr_truncated.diff
+  mv pr_truncated.diff pr.diff
+  echo "truncated=true" >> "$GITHUB_OUTPUT"
+fi