/// <summary>
/// Adds the cache file.
/// </summary>
/// <param name="builder">The builder.</param>
/// <param name="provider">The provider.</param>
/// <param name="path">The path.</param>
/// <param name="basePath">The base path.</param>
/// <param name="optional">if set to <c>true</c> [optional].</param>
/// <param name="reloadOnChange">if set to <c>true</c> [reload on change].</param>
/// <returns>IConfigurationBuilder.</returns>
public static IConfigurationBuilder AddCacheFile(this IConfigurationBuilder builder, IFileProvider provider,
string path, string basePath, bool optional, bool reloadOnChange)
{
Check.NotNull(builder, "builder");
//获取一个环境变量的路径
Check.CheckCondition(() => string.IsNullOrEmpty(path), "path");
path = EnvironmentHelper.GetEnvironmentVariable(path);
if (provider == null && Path.IsPathRooted(path))
{
provider = new PhysicalFileProvider(Path.GetDirectoryName(path));
path = Path.GetFileName(path);
}
//建立CacheConfigurationSource类，此类继承了FileConfigurationSource接口，并重写加入了json转换方法
var source = new CacheConfigurationSource
{
FileProvider = provider,
Path = path,
Optional = optional,
ReloadOnChange = reloadOnChange
};
builder.Add(source);
if (!string.IsNullOrEmpty(basePath))
{
builder.SetBasePath(basePath);
}
AppConfig.Path = path;
AppConfig.Configuration = builder.Build();
return(builder);
}
/// <summary>
/// Initializes a new instance of the <see cref="CacheConfigurationProvider" /> class.
/// </summary>
/// <param name="source">The source.</param>
public CacheConfigurationProvider(CacheConfigurationSource source) : base(source)
{
}
