/// <summary>
/// Create host builder using the LayeredSettingsHost
/// </summary>
/// <param name="args">command line arguments</param>
/// <returns>host builder</returns>
public static IHostBuilder CreateHostBuilder(string[] args) =>
LayeredSettingsHost
.CreateHostBuilder(args, SampleEnvironments.HostEnvironmentList)
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup <Startup>();
});
public void CreateHostBuilder_ObserveEnvironmentOverrideFromAppSettingsJson()
{
var reloadFlagConfig = new Dictionary <string, string>()
{
{ "hostbuilder:reloadConfigOnChange", "false" }
};
var guid = Guid.NewGuid().ToString();
var devEnvName = $"Development{guid}";
var rootFileName = "appsettings.json";
var devFileName = $"appsettings.{devEnvName}.json";
var tempPath = Path.GetTempPath();
var appSettingsPath = Path.Combine(tempPath, rootFileName);
var appSettingsDEVPath = Path.Combine(tempPath, devFileName);
SaveConfig(appSettingsPath, rootFileName);
var builder = LayeredSettingsHost.CreateHostBuilder(null, null).UseContentRoot(tempPath);
var config = builder.Build().Services.GetRequiredService <IConfiguration>();
Assert.Equal(rootFileName, config["FileName"]);
// environment specified, observe it based on how it's configured
SaveConfig(appSettingsDEVPath, devEnvName);
builder = LayeredSettingsHost.CreateHostBuilder(null, new[] { new HostEnvironment(devEnvName) })
.UseContentRoot(tempPath)
.UseEnvironment(devEnvName);
config = builder.Build().Services.GetRequiredService <IConfiguration>();
Assert.Equal(devEnvName, config["FileName"]);
// no environments are specified, default to asp.net core behavior
builder = LayeredSettingsHost.CreateHostBuilder(null, null)
.UseContentRoot(tempPath)
.UseEnvironment(devEnvName);
config = builder.Build().Services.GetRequiredService <IConfiguration>();
Assert.Equal(devEnvName, config["FileName"]);
}
public void CreateHostBuilder_ObserveEnvironmentLayering()
{
var reloadFlagConfig = new Dictionary <string, string>()
{
{ "hostbuilder:reloadConfigOnChange", "false" }
};
var guid = Guid.NewGuid().ToString();
var ppeEnvName = $"PPE{guid}";
var devEnvName = $"Development{guid}";
var ppeFileName = $"appsettings.{ppeEnvName}.json";
var devFileName = $"appsettings.{devEnvName}.json";
var tempPath = Path.GetTempPath();
var appSettingsPPEPath = Path.Combine(tempPath, ppeFileName);
var appSettingsDEVPath = Path.Combine(tempPath, devFileName);
var ppeEnv = new HostEnvironment(ppeEnvName);
var devEnv = new HostEnvironment(devEnvName, ppeEnv);
SaveConfig(appSettingsPPEPath, ppeEnvName);
SaveConfig(appSettingsDEVPath, devEnvName);
// PPE setting is used
var builder = LayeredSettingsHost.CreateHostBuilder(null, new[] { ppeEnv, devEnv })
.UseContentRoot(tempPath)
.UseEnvironment(ppeEnvName);
var config = builder.Build().Services.GetRequiredService <IConfiguration>();
Assert.Equal(ppeEnvName, config["FileName"]);
// Dev setting is used and it overrides PPE
builder = LayeredSettingsHost.CreateHostBuilder(null, new[] { ppeEnv, devEnv })
.UseContentRoot(tempPath)
.UseEnvironment(devEnvName);
config = builder.Build().Services.GetRequiredService <IConfiguration>();
Assert.Equal(devEnvName, config["FileName"]);
}
public void CreateHostBuilder_DoesntThrowOnNullEnvironments()
{
var builder = LayeredSettingsHost.CreateHostBuilder(null, null);
builder.Build();
}
