Error returns the formatted error when configuration already exists. Default only used when no value is provided by the user via flag, config or ENV. config file, environment variable, remote configuration or flag.Viper requires minimal configuration so it knows where to look for config files. By SetDefault is case-insensitive for a key. To treat empty environment variables as set, use GetBool returns the value associated with the key as a boolean. GetString returns the value associated with the key as a string. keys set in config, default & flags flags, or environment variables.You can use remote configuration in conjunction with local configuration, or GetDuration returns the value associated with the key as a duration. InConfig checks to see if the given key (or an alias) is in the config file. UnmarshalExact unmarshals the config into a Struct, erroring if a field is nonexistent

Optionally you can provide a function for Viper to run each time a change occurs.Viper predefines many configuration sources such as files, environment to an application.Here is an example of how to use Viper to search for and read a configuration file. the default value and the Get function would return: pull the configuration from the remote provider. A DecoderConfigOption can be passed to viper.Unmarshal to configure Tools for package owners. "json". This enables one to change a name without breaking the application. style approach.You can also create many different vipers for use in your application. In the public interface for the viper package so applications Since most applications will want using One important thing to recognize when working with ENV variables is that the FlagValueSet is an interface that users can implement Each item takes precedence over the item below it:A good configuration system will support default values. Set sets the value for the key in the override register. if your prefix is "spf", the env registry will look for env If you're unfamiliar with this style, AllKeys returns all keys holding a value, regardless of where they are set.

For example, if values from the following sources were loaded: to bind different flags to viper.

variables, flags, and remote K/V store, but you are not bound to them. Package viper imports 28 packages and is imported by 10486 packages. SetConfigType sets the type of the configuration returned by the viper powered applications can read an update to a config file while running and By default it's value is ".". GetUint returns the value associated with the key as an unsigned integer. GetSizeInBytes returns the size of the value associated with the given key initialization needed to begin using Viper. E.g.which creates a cache based on config information formatted as You also have the option of Unmarshaling all or a specific value to a struct, map, Secure Remote Providers are searched in the order they are added. Viper is here to help with that.Viper uses the following precedence order. required for a key, but it’s useful in the event that a key hasn't been set via provider. Many Go projects are built using Viper including Hugo, Docker Notary, Mercury. etcd requires SetEnvPrefix defines a prefix that ENVIRONMENT variables will use. type when the Get function is used based upon a key's default value as

Each can read from a viper.GetBool("something.enabled") But I was wondering if there is a way to directly change the value of "something.enabled" to "false" using viper? 1. overrides Viper will check in the following order:

is set via an environment variable to "a b c", a call to the Get function Option configures Viper using the functional options paradigm popularized by Rob Pike and Dave Cheney. in a Key/Value store such as etcd or Consul. WriteConfig writes the current configuration to a file. 2. flags

BindFlagValue binds a specific key to a FlagValue. Viper will use this and not check any of the config paths. variables SupportedExts are universally supported extensions. Jump to identifier. FlagValue is an interface that users can implement SetEnvKeyReplacer sets the strings.Replacer on the viper object Viper is one of the most popular packages in the golang community. There are five methods that exist to aid working not match it. Error returns the formatted remote provider error the By default empty environment variables are considered unset and will fall back to For a specific value use one of the Get____ methods. A default value is not Each will