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Documentation

Index

• Constants
• Variables
• func Cascade(shortCircuit bool, providers ...ConfigProvider) *configSource
• func DeepCopy(conf interface{}) (interface{}, error)
• func Default(defaultConfig interface{}) *configSource
• func EachOf(providers ...ConfigProvider) *configSource
• func Environment(key string) *configSource
• func File(configFile string, skipNonExistent bool) *configSource
• func FirstOf(providers ...ConfigProvider) *configSource
• func FromFile(configFile string, conf interface{}) error
• func FromJSONString(jsonString string, conf interface{}) error
• func FromString(configString string, conf interface{}) error
• func FromTOMLString(tomlString string, conf interface{}) error
• func JSONString(conf interface{}) string
• func Merge(base, override interface{}) (interface{}, error)
• func NewConfigProvider(from string, skip bool, apply func(baseConfig interface{}) error) *configSource
• func ReadFile(file string) ([]byte, error)
• func ShouldSkipFile(file string, skipNonExistent bool) bool
• func TOMLString(conf interface{}) string
• func XDGBaseDir(configFileName string) *configSource
• type ConfigProvider
• type Format
  • func DetectFormat(configString string) Format

Constants

const STDINFileIdentifier = "-"

If passed this identifier try to read config from STDIN

Variables

var LogWriter io.Writer

Functions

func Cascade

func Cascade(shortCircuit bool, providers ...ConfigProvider) *configSource

Builds a ConfigProvider by iterating over a cascade of ConfigProvider sources. Can be used in two distinct modes: with shortCircuit true the first successful ConfigProvider source is returned. With shortCircuit false sources appearing later are used to possibly override those appearing earlier

func DeepCopy

func DeepCopy(conf interface{}) (interface{}, error)

Passed a pointer to struct creates a deep copy of the struct

func Default

func Default(defaultConfig interface{}) *configSource

func EachOf

func EachOf(providers ...ConfigProvider) *configSource

func Environment

func Environment(key string) *configSource

Source from a single environment variable with config embedded in JSON

func File

func File(configFile string, skipNonExistent bool) *configSource

Try to source config from provided file detecting the file format, is skipNonExistent is true then the provider will fall-through (skip) when the file doesn't exist, rather than returning an error

func FirstOf

func FirstOf(providers ...ConfigProvider) *configSource

func FromFile

func FromFile(configFile string, conf interface{}) error

func FromJSONString

func FromJSONString(jsonString string, conf interface{}) error

func FromString

func FromString(configString string, conf interface{}) error

func FromTOMLString

func FromTOMLString(tomlString string, conf interface{}) error

func JSONString

func JSONString(conf interface{}) string

func Merge

func Merge(base, override interface{}) (interface{}, error)

func NewConfigProvider

func NewConfigProvider(from string, skip bool, apply func(baseConfig interface{}) error) *configSource

func ReadFile

func ReadFile(file string) ([]byte, error)

func ShouldSkipFile

func ShouldSkipFile(file string, skipNonExistent bool) bool

func TOMLString

func TOMLString(conf interface{}) string

func XDGBaseDir

func XDGBaseDir(configFileName string) *configSource

Try to find config by using XDG base dir spec

Types

type ConfigProvider

type ConfigProvider interface {
	// Description of where this provider sources its config from
	From() string
	// Get the config values to the passed in baseConfig
	Apply(baseConfig interface{}) error
	// Return a copy of the provider that does nothing if skip is true
	SetSkip(skip bool) ConfigProvider
	// Whether to skip this provider
	Skip() bool
}

type Format

type Format string

const (
	JSON    Format = "JSON"
	TOML    Format = "TOML"
	Unknown Format = ""
)

func DetectFormat

func DetectFormat(configString string) Format