ci: fix separation of docker build and test phases

ci/scripts/occt.sh

@@ -6,28 +6,18 @@ SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 PROJECT_PATH="$(cd "$SCRIPT_DIR/../../" && pwd)"
 DOCKERFILE_PATH="$SCRIPT_DIR/../occt.Dockerfile"
 
-# Check for --unit-testing argument
 RUN_UNIT_TESTS=false
 if [[ "${1-}" == "--unit-testing" ]]; then
     RUN_UNIT_TESTS=true
 fi
 
-echo "Building image..."
-if ! docker build -f "$DOCKERFILE_PATH" -t "$IMAGE_NAME" "$PROJECT_PATH"; then
-    echo "Image build failed." >&2
-    exit 1
-fi
-
-echo "Listing /usr/local/bin..."
-if ! docker run --rm "$IMAGE_NAME" ls /usr/local/bin; then
-    echo "Listing /usr/local/bin failed." >&2
-    exit 1
-fi
+echo "Building base image..."
+docker build --target base -f "$DOCKERFILE_PATH" -t "$IMAGE_NAME" "$PROJECT_PATH"
 
 if [ "$RUN_UNIT_TESTS" = true ]; then
+    echo "Building unit-testing stage..."
+    docker build --target unit-testing -f "$DOCKERFILE_PATH" -t "$IMAGE_NAME" "$PROJECT_PATH"
+
     echo "Running unit tests..."
-    if ! docker run --rm "$IMAGE_NAME" ctest --test-dir /app/build/unit-tests -V; then
-        echo "Unit tests failed." >&2
-        exit 1
-    fi
+    docker run --rm "$IMAGE_NAME" ctest --test-dir /app/build/unit-tests -V
 fi