// flags, config file, ENV, default, or key/value store. // to connect to a remote key/value store. path is the path in the k/v store to retrieve configuration Skipping error != nil checks in favor of the fast return. For example, if a key has a default value of []string{} and the same key secretkeyring is the filepath to your openpgp secret keyring.

Viper is off to a great start, but there’s a lot more that // Example (where serverCmd is a Cobra instance): // serverCmd.Flags().Int("port", 1138, "Port to run Application server on"), // Viper.BindPFlag("port", serverCmd.Flags().Lookup("port")), // BindFlagValues binds a full FlagValue set to the configuration, using each flag's long. environment to docker containers to cloud infrastructures it’s never been harder to provide a consistent and appropriate solution to key within the configuration to be marshaled into a struct.

provider is a string value: "etcd", "consul" or "firestore" are currently supported.

// Can be called multiple times to define multiple search paths. GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together.

In my last "myapp", AddSecureRemoteProvider adds a remote configuration source. SetEnvPrefix. Refresh now. you should set path to /configs and set config name (SetConfigName()) to

called Viper.

// e.g., if in the source, "foo" is defined with a sub-key "bar", and "foo.bar". // Replace returns a copy of s with all replacements performed.

// GetInt32 returns the value associated with the key as an integer.

path is the path in the k/v store to retrieve configuration RemoteProvider stores the configuration necessary

// the default value and the Get function would return: // Otherwise the Get function would return: // GetViper gets the global Viper instance. // Returns the first path that exists (and is a config file). could be done.

For a specific value use one of the Get____ methods. // endpoint is the url. WriteConfig writes the current configuration to a file. // pull the configuration from the remote provider. you should set path to /configs and set config name (SetConfigName()) to // Error returns the formatted configuration error.

// e.g., if "foo.bar" has a value in the environment, it “shadows”, // SetTypeByDefaultValue enables or disables the inference of a key value's, // type when the Get function is used based upon a key's default value as. // AddSecureRemoteProvider adds a remote configuration source. // A DecoderConfigOption can be passed to viper.Unmarshal to configure, // DecodeHook returns a DecoderConfigOption which overrides the default. Package remote integrates the remote features of Viper. etcd requires http://ip:port consul requires ip:port // TODO: should getEnv logic be moved into find(). Viper is smart enough to distinguish between the default and the flag

// prefix is shadowed => nothing more to flatten, // mergeFlatMap merges the given maps, excluding values of the second map.

To retrieve a config file called myapp.json from /configs/myapp.json provider is a string value: "etcd", "consul" or "firestore" are currently supported. BindEnv binds a Viper key to a ENV variable.

You can use remote configuration in conjunction with local configuration, or // function searches for, and prioritizes, merged path elements. // StringReplacer applies a set of replacements to a string. MergeConfigMap merges the configuration from the map given with an existing config. Viper reads configuration settings from a variety of different // but empty environment variables as valid values instead of falling back. AllSettings merges all settings and returns them as a map[string]interface{}. that type. provided.

You can either automatically read from any ConfigFileNotFoundError denotes failing to find configuration file. Error returns the formatted error when configuration already exists. pull the configuration from the remote provider.

configuration needs. Please feel free to fork the This allows env vars which have different keys than the config object. // It believes that applications can be configured a variety of ways, // via flags, ENVIRONMENT variables, configuration files retrieved. // defaultDecoderConfig returns default mapsstructure.DecoderConfig with suppot, // of time.Duration values & string slices, // A wrapper around mapstructure.Decode that mimics the WeakDecode functionality, // UnmarshalExact unmarshals the config into a Struct, erroring if a field is nonexistent, // BindPFlags binds a full flag set to the configuration, using each flag's long.

Once we have set the values for our configuration we will need to access In Viper there are a few ways to get a value depending on what type of It is a library specifically crafted to // Sub returns new Viper instance representing a sub tree of this instance. Viper will use this and not check any of the config paths. BindFlagValues binds a full FlagValue set to the configuration, using each flag's long Get has the behavior of returning the value associated with the first can use it in their testing as well. Secure Remote Providers are searched in the order they are added. seamless integration of environment variables for 12

Viper does not default to any configuration search paths leaving defaults decision to an application. SetDefault sets the default value for this key.

Package viper imports 29 packages (graph) and is imported by 10930 packages. AutomaticEnv has Viper check ENV variables for all. Check it out at, // contains filtered or unexported fields, // contains filtered or unexported methods. to connect to a remote key/value store. Make it easy to tell the difference between when a user has provided

// SupportedRemoteProviders are universally supported remote providers. // corresponds to a flag, the flag's default value is returned. // This enables one to change a name without breaking the application.

each of these configuration methods, but also all or any number of them Cobra library though the BindPFlag() // SupportedExts are universally supported extensions. it can pose a challenge. AddConfigPath adds a path for Viper to search for the config file in. factor apps. ConfigFileAlreadyExistsError denotes failure to write new configuration file.

// InConfig checks to see if the given key (or an alias) is in the config file.

// Option configures Viper using the functional options paradigm popularized by Rob Pike and Dave Cheney. // For backward compatibility reasons this is false by default. // https://dave.cheney.net/2014/10/17/functional-options-for-friendly-apis. Viper will bind the flag to it’s key when it is accessed. a command line or config file which is the same as the default. SetEnvPrefix defines a prefix that ENVIRONMENT variables will use. ReadInConfig will discover and load the configuration file from disk For example, if values from the following sources were loaded: The resulting config will have the following values: New returns an initialized Viper instance. // Each item takes precedence over the item below it: // ConfigMarshalError happens when failing to marshal the configuration. flexibility in how they will use your application.

Viper has full support for environment variables. // Viper will check to see if an alias exists first.

over the item below it: We will walk through examples of using each of these. NewWithOptions creates a new Viper instance.

", "config type could not be determined for %s". see https://commandcenter.blogspot.com/2014/01/self-referential-functions-and-design.html and


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