Function merge_parameters

dsc/src/util.rs:656–690

Merge two parameter sets, with inline parameters taking precedence over file parameters. Top-level keys (like "parameters") are merged recursively, but parameter values themselves are replaced (not merged) when specified inline. # Arguments `file_params` - Parameters from file (JSON or YAML format) `inline_params` - Inline parameters (JSON or YAML format) that take precedence # Returns `Result

(file_params: &str, inline_params: &str)

/// - Either parameter set cannot be parsed as valid JSON or YAML
/// - The merged result cannot be serialized to JSON
pub fn merge_parameters(file_params: &str, inline_params: &str) -> Result<String, DscError> {
    use serde_json::Value;

    // Convert both parameter inputs to maps
    let mut file_map = params_to_map(file_params, "FileParameters")?;
    let inline_map = params_to_map(inline_params, "InlineParameters")?;

    // Merge top-level keys
    for (key, inline_value) in &inline_map {
        if key == "parameters" {
            // Special handling for "parameters" key - merge at parameter name level only
            // Within each parameter name, inline replaces (not merges)
            if let Some(file_params_value) = file_map.get_mut("parameters") {
                if let (Some(file_params_obj), Some(inline_params_obj)) = (file_params_value.as_object_mut(), inline_value.as_object()) {
                    // For each parameter in inline, replace (not merge) in file
                    for (param_name, param_value) in inline_params_obj {
                        file_params_obj.insert(param_name.clone(), param_value.clone());
                    }
                } else {
                    // If one is not an object, inline replaces completely
                    file_map.insert(key.clone(), inline_value.clone());
                }
            } else {
                // "parameters" key doesn't exist in file, add it
                file_map.insert(key.clone(), inline_value.clone());
            }
        } else {
            // For other top-level keys, inline value replaces file value
            file_map.insert(key.clone(), inline_value.clone());
        }
    }

    let merged = Value::Object(file_map);
    Ok(serde_json::to_string(&merged)?)
}