internal void AddFileBasedSource(Func <string, SettingsSource> sourceFactory, string fileNameTemplate, bool required)
{
var fileName = _compositeDictionary.ExpandVariables(fileNameTemplate);
var fullPath = Path.Combine(_basePath, fileName);
if (File.Exists(fullPath))
{
var source = sourceFactory.Invoke(fullPath);
Add(source.ToSettingsDictionary());
}
else if (required)
{
throw new FileNotFoundException("No such file", fullPath);
}
}
/// <summary>
/// Set the environment using variable expansion
/// </summary>
public SettingsBuilder SetEnvironment(string environmentTemplate)
{
_environment = _compositeDictionary.ExpandVariables(environmentTemplate);
return(this);
}
/// <summary>
/// Replace all occurrences of the pattern ${key} within the provided template
/// if KEY has a configuration selector, ie ${key:prod} it will take precedence over the current Environment
/// </summary>
public string ExpandVariables(string template) => SettingsDictionary.ExpandVariables(template, Environment);