fix: Allow special characters for export script (#128)

template/templates/Containerfile.j2

@@ -18,7 +18,10 @@ COPY ./modules /modules
 # This stage is responsible for holding onto
 # exports like the exports.sh
 FROM docker.io/alpine as stage-exports
-RUN printf {{ export_script.print_script() }} >> /exports.sh && chmod +x /exports.sh
+COPY <<EOF /exports.sh
+{{ self::print_export_script() }}
+EOF
+RUN chmod +x /exports.sh
 
 FROM {{ recipe.base_image }}:{{ recipe.image_version }}
 
@@ -57,6 +60,8 @@ COPY --from=ghcr.io/blue-build/cli:
 latest-installer
 {%- endif %} /out/bluebuild /usr/bin/bluebuild
 
+SHELL ["bash", "-c"]
+
 {%- include "modules/modules.j2" %}
 
 # Added in case a user adds something else using the

template/templates/export.sh

@@ -1,8 +1,26 @@
 #!/usr/bin/env bash
 
-get_yaml_array() { 
-  readarray -t "$1" < <(echo "$3" | yq -I=0 "$2")
-} 
+# Function to retrieve module configs and populate an array
+# Arguments:
+#   1. Variable name to store result
+#   2. jq query
+#   3. Module config content
+get_yaml_array() {
+  local -n arr=$1
+  local jq_query=$2
+  local module_config=$3
 
+  if [[ -z $jq_query || -z $module_config ]]; then
+    echo "Usage: get_yaml_array VARIABLE_TO_STORE_RESULTS JQ_QUERY MODULE_CONFIG" >&2
+    return 1
+  fi
+
+  readarray -t arr < <(echo "$module_config" | yq -I=0 "$jq_query")
+}
+
+# Parse OS version and export it
+export OS_VERSION=$(grep -Po "(?<=VERSION_ID=)\d+" /usr/lib/os-release)
+
+# Export functions for use in sub-shells or sourced scripts
 export -f get_yaml_array
-export OS_VERSION=$(grep -Po '(?<=VERSION_ID=)\d+' /usr/lib/os-release)
+