params

package
v0.27.0 Latest Latest
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 Go to latest Published: Apr 2, 2024 License: Apache-2.0 Imports: 12 Imported by: 3

Documentation

Overview

Package params provides a generic way to describe parameters used by gadgets, operators and runtimes including validation. They can easily be serialized and handed over to different frameworks like cobra for use in CLI or a webinterface using JSON.

Index

Constants

This section is empty.

Variables

View Source 
var ErrNotFound = errors.New("not found")

Functions

func ValidateBool 

func ValidateBool(value string) error

func ValidateDuration added in v0.16.0 

func ValidateDuration(value string) error

func ValidateFloat added in v0.22.0 

func ValidateFloat(bitsize int) func(string) error

func ValidateIP added in v0.18.0 

func ValidateIP(value string) error

func ValidateInt 

func ValidateInt(bitsize int) func(string) error

func ValidateIntRange 

func ValidateIntRange(min, max int64) func(value string) error

func ValidateSlice 

func ValidateSlice(validator ParamValidator) func(value string) error

func ValidateUint 

func ValidateUint(bitsize int) func(string) error

func ValidateUintRange 

func ValidateUintRange(min, max uint64) func(value string) error

Types

type Collection 

type Collection map[string]*Params

func (Collection) CopyFromMap 

func (p Collection) CopyFromMap(source map[string]string, prefix string) error

func (Collection) CopyToMap 

func (p Collection) CopyToMap(target map[string]string, prefix string)

func (Collection) Set 

func (p Collection) Set(entry, key, val string) error

type DescCollection 

type DescCollection map[string]*ParamDescs

func (DescCollection) ToParams 

func (p DescCollection) ToParams() Collection

type Param 

type Param struct {
	*ParamDesc
	// contains filtered or unexported fields
}

Param holds a ParamDesc but can additionally store a value

func (*Param) AsAny added in v0.22.0 

func (p *Param) AsAny() any

AsAny returns the value of the parameter according to its type hint. If there is not any type hint, it returns the value as string.

func (*Param) AsBool 

func (p *Param) AsBool() bool

func (*Param) AsBytes added in v0.17.0 

func (p *Param) AsBytes() []byte

func (*Param) AsDuration added in v0.16.0 

func (p *Param) AsDuration() time.Duration

func (*Param) AsFloat32 

func (p *Param) AsFloat32() float32

func (*Param) AsFloat64 

func (p *Param) AsFloat64() float64

func (*Param) AsIP added in v0.18.0 

func (p *Param) AsIP() net.IP

func (*Param) AsInt 

func (p *Param) AsInt() int

func (*Param) AsInt16 

func (p *Param) AsInt16() int16

func (*Param) AsInt32 

func (p *Param) AsInt32() int32

func (*Param) AsInt64 

func (p *Param) AsInt64() int64

func (*Param) AsInt64Slice 

func (p *Param) AsInt64Slice() []int64

func (*Param) AsInt8 

func (p *Param) AsInt8() int8

func (*Param) AsString 

func (p *Param) AsString() string

func (*Param) AsStringSlice 

func (p *Param) AsStringSlice() []string

func (*Param) AsUint 

func (p *Param) AsUint() uint

func (*Param) AsUint16 

func (p *Param) AsUint16() uint16

func (*Param) AsUint16Slice 

func (p *Param) AsUint16Slice() []uint16

AsUint16Slice is useful for handling network ports.

func (*Param) AsUint32 

func (p *Param) AsUint32() uint32

func (*Param) AsUint64 

func (p *Param) AsUint64() uint64

func (*Param) AsUint64Slice 

func (p *Param) AsUint64Slice() []uint64

func (*Param) AsUint8 

func (p *Param) AsUint8() uint8

func (*Param) IsDefault added in v0.22.0 

func (p *Param) IsDefault() bool

func (*Param) IsSet added in v0.22.0 

func (p *Param) IsSet() bool

func (*Param) Set 

func (p *Param) Set(val string) error

Set validates and sets the new value; it is also a member of the pflag.Value interface, which is used by cobra

func (*Param) String 

func (p *Param) String() string

String is a member of the pflag.Value interface, which is used by cobra

type ParamDesc 

type ParamDesc struct {
	// Key is the name under which this param is registered; this will also be the key when
	// getting a key/value map
	Key string `json:"key" yaml:"key"`

	// Alias is a shortcut for this parameter, usually a single character used for command line
	// interfaces
	Alias string `json:"alias" yaml:"alias,omitempty"`

	// Title is an optional (pretty) alternative to key and used in user interfaces
	Title string `json:"title" yaml:"title,omitempty"`

	// DefaultValue is the value that will be used if no other value has been assigned
	DefaultValue string `json:"defaultValue" yaml:"defaultValue"`

	// Description holds an optional explanation for this parameter; shown in user interfaces
	Description string `json:"description" yaml:"description"`

	// IsMandatory will be considered when validating; if the param has no value assigned and
	// also no DefaultValue is set, validation will fail
	IsMandatory bool `json:"isMandatory" yaml:"isMandatory,omitempty"`

	// Tags can be used to skip parameters not needed for a specific environment
	Tags []string `json:"tags" yaml:"tags,omitempty"`

	// Validator is an optional function that will be called upon validation; may or may
	// not be called in user interfaces. Setting TypeHint is preferred, but can also be used
	// in combination with the Validator. Example: additionally to setting the TypeHint to
	// TypeInt, the validator could be used to make sure the given int is in a specific range.
	Validator ParamValidator `json:"-" yaml:"-"`

	// TypeHint is the preferred way to set the type of this parameter as it will invoke a
	// matching validator automatically; if unset, a value of "string" is assumed
	TypeHint TypeHint `json:"type" yaml:"type,omitempty"`

	// ValueHint can give a hint on what content is expected here - for example, it can be
	// used to hint that the param expects a kubernetes namespace, a list of nodes and so on.
	// This is helpful for frontends to provide autocompletion/selections or set defaults
	// accordingly.
	ValueHint ValueHint `json:"valueHint" yaml:"valueHint,omitempty"`

	// PossibleValues holds all possible values for this parameter and will be considered
	// when validating
	PossibleValues []string `json:"possibleValues" yaml:"possibleValues,omitempty"`
}

ParamDesc holds parameter information and validators

func (*ParamDesc) GetTitle 

func (p *ParamDesc) GetTitle() string

GetTitle returns a human friendly title of the field; if no Title has been specified, the Key will be used with the first letter upper-cased

func (*ParamDesc) IsBoolFlag 

func (p *ParamDesc) IsBoolFlag() bool

func (*ParamDesc) ToParam 

func (p *ParamDesc) ToParam() *Param

func (*ParamDesc) Type 

func (p *ParamDesc) Type() string

Type is a member of the pflag.Value interface, which is used by cobra

func (*ParamDesc) Validate 

func (p *ParamDesc) Validate(value string) error

Validate validates a string against the given parameter

type ParamDescs 

type ParamDescs []*ParamDesc

func (*ParamDescs) Add 

func (p *ParamDescs) Add(other ...*ParamDesc)

func (*ParamDescs) Get 

func (p *ParamDescs) Get(key string) *ParamDesc

Get returns the parameter with the given key or nil

func (ParamDescs) ToParams 

func (p ParamDescs) ToParams() *Params

type ParamValidator 

type ParamValidator func(value string) error

type Params 

type Params []*Param

func (*Params) Add 

func (p *Params) Add(other ...*Param)

func (*Params) AddKeyValuePair 

func (p *Params) AddKeyValuePair(key, value string)

func (*Params) CopyFromMap 

func (p *Params) CopyFromMap(source map[string]string, prefix string) error

func (*Params) CopyToMap 

func (p *Params) CopyToMap(target map[string]string, prefix string)

func (*Params) Get 

func (p *Params) Get(key string) *Param

Get returns the parameter with the given key or nil

func (*Params) ParamMap 

func (p *Params) ParamMap() (res map[string]string)

func (*Params) Set 

func (p *Params) Set(key, val string) error

func (*Params) ValidateStringMap 

func (p *Params) ValidateStringMap(cfg map[string]string) error

type TypeHint 

type TypeHint string
const (
	TypeUnknown  TypeHint = ""
	TypeBool     TypeHint = "bool"
	TypeString   TypeHint = "string"
	TypeBytes    TypeHint = "bytes"
	TypeInt      TypeHint = "int"
	TypeInt8     TypeHint = "int8"
	TypeInt16    TypeHint = "int16"
	TypeInt32    TypeHint = "int32"
	TypeInt64    TypeHint = "int64"
	TypeUint     TypeHint = "uint"
	TypeUint8    TypeHint = "uint8"
	TypeUint16   TypeHint = "uint16"
	TypeUint32   TypeHint = "uint32"
	TypeUint64   TypeHint = "uint64"
	TypeFloat32  TypeHint = "float32"
	TypeFloat64  TypeHint = "float64"
	TypeDuration TypeHint = "duration"
	TypeIP       TypeHint = "ip"
)

type ValueHint added in v0.15.0 

type ValueHint string

Source Files

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