viper

package
v1.3.0 Latest Latest
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Published: Jun 27, 2021 License: Apache-2.0, MIT Imports: 20 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

View Source
var RemoteConfig remoteConfigFactory

RemoteConfig is optional, see the remote package

View Source
var SupportedExts []string = []string{"json", "toml", "yaml", "yml", "properties", "props", "prop"}

Universally supported extensions.

View Source
var SupportedRemoteProviders []string = []string{"etcd", "consul"}

Universally supported remote providers.

Functions

func AddConfigPath

func AddConfigPath(in string)

Add a path for Viper to search for the config file in. Can be called multiple times to define multiple search paths.

func AddRemoteProvider

func AddRemoteProvider(provider, endpoint, path string) error

AddRemoteProvider adds a remote configuration source. Remote Providers are searched in the order they are added. provider is a string value, "etcd" or "consul" are currently supported. endpoint is the url. etcd requires http://ip:port consul requires ip:port path is the path in the k/v store to retrieve configuration To retrieve a config file called myapp.json from /configs/myapp.json you should set path to /configs and set config name (SetConfigName()) to "myapp"

func AddSecureRemoteProvider

func AddSecureRemoteProvider(provider, endpoint, path, secretkeyring string) error

AddSecureRemoteProvider adds a remote configuration source. Secure Remote Providers are searched in the order they are added. provider is a string value, "etcd" or "consul" are currently supported. endpoint is the url. etcd requires http://ip:port consul requires ip:port secretkeyring is the filepath to your openpgp secret keyring. e.g. /etc/secrets/myring.gpg path is the path in the k/v store to retrieve configuration To retrieve a config file called myapp.json from /configs/myapp.json you should set path to /configs and set config name (SetConfigName()) to "myapp" Secure Remote Providers are implemented with github.com/xordataexchange/crypt

func AllKeys

func AllKeys() []string

Return all keys regardless where they are set

func AllSettings

func AllSettings() map[string]interface{}

Return all settings as a map[string]interface{}

func AutomaticEnv

func AutomaticEnv()

Have Viper check ENV variables for all keys set in config, default & flags

func BindEnv

func BindEnv(input ...string) (err error)

Binds a Viper key to a ENV variable ENV variables are case sensitive If only a key is provided, it will use the env key matching the key, uppercased. EnvPrefix will be used when set when env name is not provided.

func BindPFlag

func BindPFlag(key string, flag *pflag.Flag) (err error)

Bind a specific key to a flag (as used by cobra) 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"))

func BindPFlags

func BindPFlags(flags *pflag.FlagSet) (err error)

Bind a full flag set to the configuration, using each flag's long name as the config key.

func ConfigFileUsed

func ConfigFileUsed() string

Return the file used to populate the config registry

func Debug

func Debug()

Prints all configuration registries for debugging purposes.

func Get

func Get(key string) interface{}

Viper is essentially repository for configurations Get can retrieve any value given the key to use Get has the behavior of returning the value associated with the first place from where it is set. Viper will check in the following order: override, flag, env, config file, key/value store, default

Get returns an interface. For a specific value use one of the Get____ methods.

func GetBool

func GetBool(key string) bool

Returns the value associated with the key asa boolean

func GetDuration

func GetDuration(key string) time.Duration

Returns the value associated with the key as a duration

func GetFloat64

func GetFloat64(key string) float64

Returns the value associated with the key as a float64

func GetInt

func GetInt(key string) int

Returns the value associated with the key as an integer

func GetSizeInBytes

func GetSizeInBytes(key string) uint

Returns the size of the value associated with the given key in bytes.

func GetString

func GetString(key string) string

Returns the value associated with the key as a string

func GetStringMap

func GetStringMap(key string) map[string]interface{}

Returns the value associated with the key as a map of interfaces

func GetStringMapString

func GetStringMapString(key string) map[string]string

Returns the value associated with the key as a map of strings

func GetStringMapStringSlice

func GetStringMapStringSlice(key string) map[string][]string

Returns the value associated with the key as a map to a slice of strings.

func GetStringSlice

func GetStringSlice(key string) []string

Returns the value associated with the key as a slice of strings

func GetTime

func GetTime(key string) time.Time

Returns the value associated with the key as time

func InConfig

func InConfig(key string) bool

Check to see if the given key (or an alias) is in the config file

func IsSet

func IsSet(key string) bool

Check to see if the key has been set in any of the data locations

func ReadConfig

func ReadConfig(in io.Reader) error

func ReadInConfig

func ReadInConfig() error

Viper will discover and load the configuration file from disk and key/value stores, searching in one of the defined paths.

func ReadRemoteConfig

func ReadRemoteConfig() error

Attempts to get configuration from a remote source and read it in the remote configuration registry.

func RegisterAlias

func RegisterAlias(alias string, key string)

Aliases provide another accessor for the same key. This enables one to change a name without breaking the application

func Reset

func Reset()

Intended for testing, will reset all to default settings. In the public interface for the viper package so applications can use it in their testing as well.

func Set

func Set(key string, value interface{})

Sets the value for the key in the override regiser. Will be used instead of values obtained via flags, config file, ENV, default, or key/value store

func SetConfigFile

func SetConfigFile(in string)

Explicitly define the path, name and extension of the config file Viper will use this and not check any of the config paths

func SetConfigName

func SetConfigName(in string)

Name for the config file. Does not include extension.

func SetConfigType

func SetConfigType(in string)

Sets the type of the configuration returned by the remote source, e.g. "json".

func SetDefault

func SetDefault(key string, value interface{})

Set the default value for this key. Default only used when no value is provided by the user via flag, config or ENV.

func SetEnvKeyReplacer

func SetEnvKeyReplacer(r *strings.Replacer)

SetEnvKeyReplacer sets the strings.Replacer on the viper object Useful for mapping an environmental variable to a key that does not match it.

func SetEnvPrefix

func SetEnvPrefix(in string)

Define a prefix that ENVIRONMENT variables will use. E.g. if your prefix is "spf", the env registry will look for env. variables that start with "SPF_"

func SetTypeByDefaultValue

func SetTypeByDefaultValue(enable bool)

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 opposed to the value returned based on the normal fetch logic.

For example, if a key has a default value of []string{} and the same key is set via an environment variable to "a b c", a call to the Get function would return a string slice for the key if the key's type is inferred by the default value and the Get function would return:

[]string {"a", "b", "c"}

Otherwise the Get function would return:

"a b c"

func Unmarshal

func Unmarshal(rawVal interface{}) error

Unmarshals the config into a Struct. Make sure that the tags on the fields of the structure are properly set.

func UnmarshalKey

func UnmarshalKey(key string, rawVal interface{}) error

Takes a single key and unmarshals it into a Struct

func WatchRemoteConfig

func WatchRemoteConfig() error

Types

type ConfigFileNotFoundError

type ConfigFileNotFoundError struct {
	// contains filtered or unexported fields
}

Denotes failing to find configuration file.

func (ConfigFileNotFoundError) Error

func (fnfe ConfigFileNotFoundError) Error() string

Returns the formatted configuration error.

type ConfigParseError

type ConfigParseError struct {
	// contains filtered or unexported fields
}

Denotes failing to parse configuration file.

func (ConfigParseError) Error

func (pe ConfigParseError) Error() string

Returns the formatted configuration error.

type RemoteConfigError

type RemoteConfigError string

Denotes encountering an error while trying to pull the configuration from the remote provider.

func (RemoteConfigError) Error

func (rce RemoteConfigError) Error() string

Returns the formatted remote provider error

type RemoteProvider

type RemoteProvider interface {
	Provider() string
	Endpoint() string
	Path() string
	SecretKeyring() string
}

RemoteProvider stores the configuration necessary to connect to a remote key/value store. Optional secretKeyring to unencrypt encrypted values can be provided.

type UnsupportedConfigError

type UnsupportedConfigError string

Denotes encountering an unsupported configuration filetype.

func (UnsupportedConfigError) Error

func (str UnsupportedConfigError) Error() string

Returns the formatted configuration error.

type UnsupportedRemoteProviderError

type UnsupportedRemoteProviderError string

Denotes encountering an unsupported remote provider. Currently only Etcd and Consul are supported.

func (UnsupportedRemoteProviderError) Error

Returns the formatted remote provider error.

type Viper

type Viper struct {
	// contains filtered or unexported fields
}

Viper is a prioritized configuration registry. It maintains a set of configuration sources, fetches values to populate those, and provides them according to the source's priority. The priority of the sources is the following: 1. overrides 2. flags 3. env. variables 4. config file 5. key/value store 6. defaults

For example, if values from the following sources were loaded:

 Defaults : {
 	"secret": "",
 	"user": "default",
	    "endpoint": "https://localhost"
 }
 Config : {
 	"user": "root"
	    "secret": "defaultsecret"
 }
 Env : {
 	"secret": "somesecretkey"
 }

The resulting config will have the following values:

{
	"secret": "somesecretkey",
	"user": "root",
	"endpoint": "https://localhost"
}

func New

func New() *Viper

Returns an initialized Viper instance.

func (*Viper) AddConfigPath

func (v *Viper) AddConfigPath(in string)

func (*Viper) AddRemoteProvider

func (v *Viper) AddRemoteProvider(provider, endpoint, path string) error

func (*Viper) AddSecureRemoteProvider

func (v *Viper) AddSecureRemoteProvider(provider, endpoint, path, secretkeyring string) error

func (*Viper) AllKeys

func (v *Viper) AllKeys() []string

func (*Viper) AllSettings

func (v *Viper) AllSettings() map[string]interface{}

func (*Viper) AutomaticEnv

func (v *Viper) AutomaticEnv()

func (*Viper) BindEnv

func (v *Viper) BindEnv(input ...string) (err error)

func (*Viper) BindPFlag

func (v *Viper) BindPFlag(key string, flag *pflag.Flag) (err error)

func (*Viper) BindPFlags

func (v *Viper) BindPFlags(flags *pflag.FlagSet) (err error)

func (*Viper) ConfigFileUsed

func (v *Viper) ConfigFileUsed() string

func (*Viper) Debug

func (v *Viper) Debug()

func (*Viper) Get

func (v *Viper) Get(key string) interface{}

func (*Viper) GetBool

func (v *Viper) GetBool(key string) bool

func (*Viper) GetDuration

func (v *Viper) GetDuration(key string) time.Duration

func (*Viper) GetFloat64

func (v *Viper) GetFloat64(key string) float64

func (*Viper) GetInt

func (v *Viper) GetInt(key string) int

func (*Viper) GetSizeInBytes

func (v *Viper) GetSizeInBytes(key string) uint

func (*Viper) GetString

func (v *Viper) GetString(key string) string

func (*Viper) GetStringMap

func (v *Viper) GetStringMap(key string) map[string]interface{}

func (*Viper) GetStringMapString

func (v *Viper) GetStringMapString(key string) map[string]string

func (*Viper) GetStringMapStringSlice

func (v *Viper) GetStringMapStringSlice(key string) map[string][]string

func (*Viper) GetStringSlice

func (v *Viper) GetStringSlice(key string) []string

func (*Viper) GetTime

func (v *Viper) GetTime(key string) time.Time

func (*Viper) InConfig

func (v *Viper) InConfig(key string) bool

func (*Viper) IsSet

func (v *Viper) IsSet(key string) bool

func (*Viper) ReadConfig

func (v *Viper) ReadConfig(in io.Reader) error

func (*Viper) ReadInConfig

func (v *Viper) ReadInConfig() error

func (*Viper) ReadRemoteConfig

func (v *Viper) ReadRemoteConfig() error

func (*Viper) RegisterAlias

func (v *Viper) RegisterAlias(alias string, key string)

func (*Viper) Set

func (v *Viper) Set(key string, value interface{})

func (*Viper) SetConfigFile

func (v *Viper) SetConfigFile(in string)

func (*Viper) SetConfigName

func (v *Viper) SetConfigName(in string)

func (*Viper) SetConfigType

func (v *Viper) SetConfigType(in string)

func (*Viper) SetDefault

func (v *Viper) SetDefault(key string, value interface{})

func (*Viper) SetEnvKeyReplacer

func (v *Viper) SetEnvKeyReplacer(r *strings.Replacer)

func (*Viper) SetEnvPrefix

func (v *Viper) SetEnvPrefix(in string)

func (*Viper) SetTypeByDefaultValue

func (v *Viper) SetTypeByDefaultValue(enable bool)

func (*Viper) Unmarshal

func (v *Viper) Unmarshal(rawVal interface{}) error

func (*Viper) UnmarshalKey

func (v *Viper) UnmarshalKey(key string, rawVal interface{}) error

func (*Viper) WatchRemoteConfig

func (v *Viper) WatchRemoteConfig() error

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