traefik/vendor/github.com/containous/flaeg/parse/parse.go
2018-03-12 22:00:04 +01:00

313 lines
8.1 KiB
Go

package parse
import (
"encoding/json"
"flag"
"fmt"
"reflect"
"strconv"
"strings"
"time"
)
// Parser is an interface that allows the contents of a flag.Getter to be set.
type Parser interface {
flag.Getter
SetValue(interface{})
}
// BoolValue bool Value type
type BoolValue bool
// Set sets bool value from the given string value.
func (b *BoolValue) Set(s string) error {
v, err := strconv.ParseBool(s)
*b = BoolValue(v)
return err
}
// Get returns the bool value.
func (b *BoolValue) Get() interface{} { return bool(*b) }
func (b *BoolValue) String() string { return fmt.Sprintf("%v", *b) }
// IsBoolFlag return true
func (b *BoolValue) IsBoolFlag() bool { return true }
// SetValue sets the duration from the given bool-asserted value.
func (b *BoolValue) SetValue(val interface{}) {
*b = BoolValue(val.(bool))
}
// BoolFlag optional interface to indicate boolean flags that can be
// supplied without "=value" text
type BoolFlag interface {
flag.Value
IsBoolFlag() bool
}
// IntValue int Value
type IntValue int
// Set sets int value from the given string value.
func (i *IntValue) Set(s string) error {
v, err := strconv.ParseInt(s, 0, 64)
*i = IntValue(v)
return err
}
// Get returns the int value.
func (i *IntValue) Get() interface{} { return int(*i) }
func (i *IntValue) String() string { return fmt.Sprintf("%v", *i) }
// SetValue sets the IntValue from the given int-asserted value.
func (i *IntValue) SetValue(val interface{}) {
*i = IntValue(val.(int))
}
// Int64Value int64 Value
type Int64Value int64
// Set sets int64 value from the given string value.
func (i *Int64Value) Set(s string) error {
v, err := strconv.ParseInt(s, 0, 64)
*i = Int64Value(v)
return err
}
// Get returns the int64 value.
func (i *Int64Value) Get() interface{} { return int64(*i) }
func (i *Int64Value) String() string { return fmt.Sprintf("%v", *i) }
// SetValue sets the Int64Value from the given int64-asserted value.
func (i *Int64Value) SetValue(val interface{}) {
*i = Int64Value(val.(int64))
}
// UintValue uint Value
type UintValue uint
// Set sets uint value from the given string value.
func (i *UintValue) Set(s string) error {
v, err := strconv.ParseUint(s, 0, 64)
*i = UintValue(v)
return err
}
// Get returns the uint value.
func (i *UintValue) Get() interface{} { return uint(*i) }
func (i *UintValue) String() string { return fmt.Sprintf("%v", *i) }
// SetValue sets the UintValue from the given uint-asserted value.
func (i *UintValue) SetValue(val interface{}) {
*i = UintValue(val.(uint))
}
// Uint64Value uint64 Value
type Uint64Value uint64
// Set sets uint64 value from the given string value.
func (i *Uint64Value) Set(s string) error {
v, err := strconv.ParseUint(s, 0, 64)
*i = Uint64Value(v)
return err
}
// Get returns the uint64 value.
func (i *Uint64Value) Get() interface{} { return uint64(*i) }
func (i *Uint64Value) String() string { return fmt.Sprintf("%v", *i) }
// SetValue sets the Uint64Value from the given uint64-asserted value.
func (i *Uint64Value) SetValue(val interface{}) {
*i = Uint64Value(val.(uint64))
}
// StringValue string Value
type StringValue string
// Set sets string value from the given string value.
func (s *StringValue) Set(val string) error {
*s = StringValue(val)
return nil
}
// Get returns the string value.
func (s *StringValue) Get() interface{} { return string(*s) }
func (s *StringValue) String() string { return string(*s) }
// SetValue sets the StringValue from the given string-asserted value.
func (s *StringValue) SetValue(val interface{}) {
*s = StringValue(val.(string))
}
// Float64Value float64 Value
type Float64Value float64
// Set sets float64 value from the given string value.
func (f *Float64Value) Set(s string) error {
v, err := strconv.ParseFloat(s, 64)
*f = Float64Value(v)
return err
}
// Get returns the float64 value.
func (f *Float64Value) Get() interface{} { return float64(*f) }
func (f *Float64Value) String() string { return fmt.Sprintf("%v", *f) }
// SetValue sets the Float64Value from the given float64-asserted value.
func (f *Float64Value) SetValue(val interface{}) {
*f = Float64Value(val.(float64))
}
// Duration is a custom type suitable for parsing duration values.
// It supports `time.ParseDuration`-compatible values and suffix-less digits; in
// the latter case, seconds are assumed.
type Duration time.Duration
// Set sets the duration from the given string value.
func (d *Duration) Set(s string) error {
if v, err := strconv.Atoi(s); err == nil {
*d = Duration(time.Duration(v) * time.Second)
return nil
}
v, err := time.ParseDuration(s)
*d = Duration(v)
return err
}
// Get returns the duration value.
func (d *Duration) Get() interface{} { return time.Duration(*d) }
// String returns a string representation of the duration value.
func (d *Duration) String() string { return (*time.Duration)(d).String() }
// SetValue sets the duration from the given Duration-asserted value.
func (d *Duration) SetValue(val interface{}) {
*d = val.(Duration)
}
// MarshalText serialize the given duration value into a text.
func (d *Duration) MarshalText() ([]byte, error) {
return []byte(d.String()), nil
}
// UnmarshalText deserializes the given text into a duration value.
// It is meant to support TOML decoding of durations.
func (d *Duration) UnmarshalText(text []byte) error {
return d.Set(string(text))
}
// MarshalJSON serializes the given duration value.
func (d *Duration) MarshalJSON() ([]byte, error) {
return json.Marshal(time.Duration(*d))
}
// UnmarshalJSON deserializes the given text into a duration value.
func (d *Duration) UnmarshalJSON(text []byte) error {
if v, err := strconv.Atoi(string(text)); err == nil {
*d = Duration(time.Duration(v))
return nil
}
// We use json unmarshal on value because we have the quoted version
var value string
err := json.Unmarshal(text, &value)
if err != nil {
return err
}
v, err := time.ParseDuration(value)
*d = Duration(v)
return err
}
// TimeValue time.Time Value
type TimeValue time.Time
// Set sets time.Time value from the given string value.
func (t *TimeValue) Set(s string) error {
v, err := time.Parse(time.RFC3339, s)
*t = TimeValue(v)
return err
}
// Get returns the time.Time value.
func (t *TimeValue) Get() interface{} { return time.Time(*t) }
func (t *TimeValue) String() string { return (*time.Time)(t).String() }
// SetValue sets the TimeValue from the given time.Time-asserted value.
func (t *TimeValue) SetValue(val interface{}) {
*t = TimeValue(val.(time.Time))
}
// SliceStrings parse slice of strings
type SliceStrings []string
// Set adds strings elem into the the parser.
// It splits str on , and ;
func (s *SliceStrings) Set(str string) error {
fargs := func(c rune) bool {
return c == ',' || c == ';'
}
// get function
slice := strings.FieldsFunc(str, fargs)
*s = append(*s, slice...)
return nil
}
// Get []string
func (s *SliceStrings) Get() interface{} { return []string(*s) }
// String return slice in a string
func (s *SliceStrings) String() string { return fmt.Sprintf("%v", *s) }
// SetValue sets []string into the parser
func (s *SliceStrings) SetValue(val interface{}) {
*s = SliceStrings(val.([]string))
}
// LoadParsers loads default parsers and custom parsers given as parameter.
// Return a map [reflect.Type]parsers
// bool, int, int64, uint, uint64, float64,
func LoadParsers(customParsers map[reflect.Type]Parser) (map[reflect.Type]Parser, error) {
parsers := map[reflect.Type]Parser{}
var boolParser BoolValue
parsers[reflect.TypeOf(true)] = &boolParser
var intParser IntValue
parsers[reflect.TypeOf(1)] = &intParser
var int64Parser Int64Value
parsers[reflect.TypeOf(int64(1))] = &int64Parser
var uintParser UintValue
parsers[reflect.TypeOf(uint(1))] = &uintParser
var uint64Parser Uint64Value
parsers[reflect.TypeOf(uint64(1))] = &uint64Parser
var stringParser StringValue
parsers[reflect.TypeOf("")] = &stringParser
var float64Parser Float64Value
parsers[reflect.TypeOf(float64(1.5))] = &float64Parser
var durationParser Duration
parsers[reflect.TypeOf(Duration(time.Second))] = &durationParser
var timeParser TimeValue
parsers[reflect.TypeOf(time.Now())] = &timeParser
for rType, parser := range customParsers {
parsers[rType] = parser
}
return parsers, nil
}