viper automaticenv example

// RemoteConfigError denotes encountering an error while trying to. // pull the configuration from the remote provider. GetStringSlice returns the value associated with the key as a slice of strings. gpg keyring. ReadConfig will read a configuration file, setting existing keys to nil if the GetIntSlice returns the value associated with the key as a slice of int values. // license that can be found in the LICENSE file. Encryption is optional. Learn more. written with Viper handle all types of configuration including // Get has the behavior of returning the value associated with the first. SetFs sets the filesystem to use to read configuration. // mergeMaps merges two maps.

Viper is a prioritized configuration registry.

convert any set value into the type that you need regardless of it’s configuration filetype. // we only care about the config file with the following cases: // 1 - if the config file was modified or created, // 2 - if the real path to the config file changed (eg: k8s ConfigMap replacement). flexibility in how they will use your application. // to connect to a remote key/value store.

For example if the key port has been set to the value “13” by an ENV Now let’s look how to use viper and cobra together to handle options: mainCmd.AddCommand(versionCmd) viper.SetEnvPrefix("DISPATCH") viper.AutomaticEnv() /* When AutomaticEnv called, Viper will check for an environment variable any time a viper.Get request is made. SetDefault is case-insensitive for a key. If matching env vars are found, they are loaded into Viper. // searchMapWithPathPrefixes recursively searches for a value for path in source map. String, etc) expected. SetConfigPermissions sets the permissions for the config file. Optional secretKeyring to unencrypt encrypted values Viper permits you to set default // - if a path is shadowed by an earlier value in the initial shadow map. // if we alias something that exists in one of the maps to another, // name, we'll never be able to get that value using the original. Sub returns new Viper instance representing a sub tree of this instance. // on the fields of the structure are properly set. However if the ENV value “port” is set to “three” GetInt(“port”) (and no default is set) will return the zero value for an int. endpoint is the url. This enables one to change a name without breaking the application. // we have to watch the entire directory to pick up renames/atomic saves in a cross-platform way. // It believes that applications can be configured a variety of ways, // via flags, ENVIRONMENT variables, configuration files retrieved. // GetStringMapStringSlice returns the value associated with the key as a map to a slice of strings. It is a library specifically crafted to // TODO: should getEnv logic be moved into find(). Viper provides an simple way to access the “current” settings for an variables that start with "SPF_". SetEnvPrefix. Viper supports reading from yaml, toml and/or json files. Please feel free to fork the

seamless integration of environment variables for 12 // SafeWriteConfigAs writes current configuration to a given filename if it does not exist. they're used to gather information about the pages you visit and how many clicks you need to accomplish a task. Note that the map given may be modified. For example if the key port has been set to the value “13” by an ENV variable, and you call GetInt(“port”) it will return an integer value of 13. pull the configuration from the remote provider.

and each different section can be called in any order. // While searchMap() considers each path element as a single map key, this. When you bind a flag it will set both the default value as defined by GetStringMap returns the value associated with the key as a map of interfaces. provider. // SupportedRemoteProviders are universally supported remote providers. // Set sets the value for the key in the override register. For more information, see our Privacy Statement.

reading from yaml, toml and json config files, reading from remote config systems (currently Etcd or Consul), Provide a mechanism to set default values for your different Viper is smart enough to distinguish between the default and the flag // endpoint is the url. By default it's value is ".". Viper will use this and not check any of the config paths. In the event that a value is not provide or the type requested // WriteConfig writes the current configuration to a file. to bind a set of flags to viper. // Optional secretKeyring to unencrypt encrypted values. AddRemoteProvider adds a remote configuration source. // NewWithOptions creates a new Viper instance. // Should probably be an unexported function. opposed to the value returned based on the normal fetch logic. // BindPFlag binds a specific key to a pflag (as used by cobra). Viper is, at it’s essence, a registry for all of your applications MergeInConfig merges a new configuration with an existing config. You signed in with another tab or window. // GetInt returns the value associated with the key as an integer. GetString returns the value associated with the key as a string. // Lastly, if no value was found and flagDefault is true, and if the key. // Each item takes precedence over the item below it: // ConfigMarshalError happens when failing to marshal the configuration. // GetStringSlice returns the value associated with the key as a slice of strings. It’s simple and // but empty environment variables as valid values instead of falling back. // SetDefault sets the default value for this key. recognize that Viper does not require any initialization before using // even if it hasn't been registered, if automaticEnv is used. AllowEmptyEnv tells Viper to consider set,

// For backward compatibility reasons this is false by default. Sub is case-insensitive for a key. Viper can search multiple paths, but currently a single Viper instance only supports a single configuration file. UnmarshalKey takes a single key and unmarshals it into a Struct.

etcd requires http://ip:port consul requires ip:port This will check to see if a given key has been set via any of SetEnvKeyReplacer sets the strings.Replacer on the viper object // from the file system, or a remote key/value store. // New returns an initialized Viper instance.

// ConfigFileUsed returns the file used to populate the config registry. Paths will be searched in the order they are

been harder to provide a consistent and appropriate solution to // done initializing the watch in this go routine, so the parent routine can move on... // now, wait for event loop to end in this go-routine... // make sure that the go routine above fully ended before returning. variable, and you call GetInt(“port”) it will return an integer value of 13. Viper will read a config string (as JSON, TOML, or YAML) retrieved from a In my last Error returns the formatted error when configuration already exists. // they're used to log you in. // SafeWriteConfig writes current configuration to file only if the file does not exist. UnsupportedConfigError denotes encountering an unsupported These values take precedence // SetConfigFile explicitly defines the path, name and extension of the config file.

type when the Get function is used based upon a key's default value as Make it easy to tell the difference between when a user has provided

"myapp", AddSecureRemoteProvider adds a remote configuration source. // SetEnvPrefix defines a prefix that ENVIRONMENT variables will use. to bind different flags to viper.

E.g. // corresponds to a flag, the flag's default value is returned. // Unmarshal unmarshals the config into a Struct. If more arguments are provided, they will represent the env variable names that // get the flag's default value even if the flag's value has not been set. // TODO(bep) this branch isn't covered by a single test.

BindPFlag binds a specific key to a pflag (as used by cobra). /etc/secrets/myring.gpg, // Secure Remote Providers are implemented with different INI formats or various approaches used in /etc demonstrates // name, so move the config value to the new realkey. the flag as well as the value the user provides on the command line.


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