diff

Documentation

Overview

Package diff provides the Diff class that can be used to compare CloudFormation templates

Index

• func GetResourceActions(d Diff) map[string]ActionType
• type ActionType
• type Diff
  • func CompareMaps(old, new map[string]interface{}) Diff
  • func New(a, b cft.Template) Diff
• type Mode
  • func (m Mode) String() string

Examples

• New

Functions

func GetResourceActions

func GetResourceActions(d Diff) map[string]ActionType

Types

type ActionType

type ActionType string

const (
	Create ActionType = "Create"
	Update ActionType = "Update"
	Delete ActionType = "Delete"
	None   ActionType = "None"
)

type Diff

type Diff interface {
	// Mode represents the type of change in a Diff
	Mode() Mode

	// String returns a string representation of the Diff
	String() string

	// Format returns a pretty-printed representation of the Diff
	// The long flag determines whether to produce long or short output
	Format(bool) string

	// Value returns the value represented by the Diff
	Value() interface{}
}

Diff is the common interface for the other types in this package.

A Diff represents the difference (or lack of difference) between two values

func CompareMaps

func CompareMaps(old, new map[string]interface{}) Diff

func New

func New(a, b cft.Template) Diff

New returns a Diff that represents the difference between two templates

Example

original := map[string]interface{}{
	"foo": []interface{}{
		"bar",
		"baz",
	},
	"quux": map[string]interface{}{
		"mooz": "xyzzy",
	},
}

fmt.Println(compareValues(original, map[string]interface{}{
	"cake": "lie",
}))

Output:

(|)map[cake:(+)lie foo:(-)[bar baz] quux:(-)map[mooz:xyzzy]]

type Mode

type Mode string

Mode represents a diff mode

const (
	// Added represents a new value
	Added Mode = "+"

	// Removed represents a removed value
	Removed Mode = "-"

	// Changed represents a modified value
	Changed Mode = ">"

	// Involved represents a value that contains changes but is not wholly new itself
	Involved Mode = "|"

	// Unchanged represents a value that has not changed
	Unchanged Mode = "="
)

func (Mode) String

func (m Mode) String() string