ci: Keep hash of kicad schematics to check for actual changes before …

…export to omit just changing timestamps.

hardware/KiCad/.container/export.sh

@@ -1,27 +1,45 @@
 #!/usr/bin/env bash
+set -euo pipefail
 
 EXPORT_ROOT_DIR="export"
-EXPORT_SVG_DIR="${EXPORT_ROOT_DIR}/svg"
+EXPORT_SVG_DIR="$EXPORT_ROOT_DIR/svg"
+HASH_FILE="$EXPORT_ROOT_DIR/.kicad_sch_hash"
 
-PROJECT_NAME=${1}
-KICAD_SCH="${PROJECT_NAME}.kicad_sch"
+PROJECT_NAME=$1
+KICAD_SCH="$PROJECT_NAME.kicad_sch"
+
+echo "📄 Exporting $KICAD_SCH"
+
+echo "🔎 Checking schematic for changes..."
+OLD_HASH=$(test -f "$HASH_FILE" && cat "$HASH_FILE" || echo "0")
+NEW_HASH=$(find -type f -iname "*.kicad_sch" | sort | xargs sha256sum | sha256sum | head --bytes 64)
+
+if [ $OLD_HASH == $NEW_HASH ]; then
+  echo "... no changes detected."
+  echo "✅ Skipped export."
+  exit 0
+fi
 
-echo "📄 Exporting ${KICAD_SCH}"
 echo "⚠️ Old files will be removed first!"
+rm --force --recursive $EXPORT_ROOT_DIR
+mkdir --parent $EXPORT_ROOT_DIR
 
-rm --force --recursive ${EXPORT_ROOT_DIR}
+echo "🧮 Wriing new hash to file."
+echo "$NEW_HASH" > $HASH_FILE
 
-mkdir -p ${EXPORT_ROOT_DIR}
+echo "📃 Exporting to PDF."
+mkdir -p $EXPORT_ROOT_DIR
 eeschema_do export \
     --all_pages \
     --file_format pdf\
-     ${KICAD_SCH} ${EXPORT_ROOT_DIR}
+     $KICAD_SCH $EXPORT_ROOT_DIR
 
-mkdir -p ${EXPORT_SVG_DIR}
+echo "🖼️ Exporting to SVG."
+mkdir -p $EXPORT_SVG_DIR
 eeschema_do export \
     --all_pages \
     --file_format svg \
     --background_color \
-    ${KICAD_SCH} ${EXPORT_SVG_DIR}
+    $KICAD_SCH $EXPORT_SVG_DIR
 
 echo "✅ Done"

hardware/KiCad/OpenMI/export/.kicad_sch_hash

@@ -0,0 +1 @@
+f1dd10bfc7028ffe029f4f35cd2ee310f693cbd35de397462842279c374dfb57