metadataobject

Documentation

Index

• Constants
• Variables
• func DefaultGetFiles(yamlFile string) ([]string, error)
• func DefaultWriteDiff(opts DefaultWriteDiffOpts) error
• func GetEncoder(destination io.Writer) *yaml.Encoder
• func ReadMetadataFile(filename string) ([]byte, error)
• type DefaultObjectType
• type DefaultWriteDiffOpts
• type ErrParsingMetadataObject
  • func DefaultExport(object Object, metadata map[string]yaml.Node, ...) (map[string][]byte, ErrParsingMetadataObject)
  • func NewErrParsingMetadataObject(o Object, err error, context ...string) ErrParsingMetadataObject
• type Object
• type Objects
• type WriteDiffOpts

Constants

const (
	VersionKey                    string = "version"
	SourcesKey                    string = "sources"
	TablesKey                     string = "tables"
	FunctionsKey                  string = "functions"
	ActionsKey                    string = "actions"
	CustomTypesKey                string = "custom_types"
	RemoteSchemasKey              string = "remote_schemas"
	QueryCollectionsKey           string = "query_collections"
	AllowListKey                  string = "allowlist"
	CronTriggersKey               string = "cron_triggers"
	APILimitsKey                  string = "api_limits"
	RestEndpointsKey              string = "rest_endpoints"
	InheritedRolesKey             string = "inherited_roles"
	GraphQLSchemaIntrospectionKey string = "graphql_schema_introspection"
	NetworkKey                    string = "network"
)

Variables

var ErrMetadataFileNotFound = fmt.Errorf("metadata file not found")

Functions

func DefaultGetFiles

func DefaultGetFiles(yamlFile string) ([]string, error)

DefaultGetFiles is a default implementation for Object.GetFiles

func DefaultWriteDiff

func DefaultWriteDiff(opts DefaultWriteDiffOpts) error

DefaultWriteDiff is the default implementation for Object.WriteDiff

func GetEncoder

func GetEncoder(destination io.Writer) *yaml.Encoder

GetEncoder is the YAML encoder which is expected to be used in all implementations of Object. This helps bring uniformity in the format of generated YAML

func ReadMetadataFile

func ReadMetadataFile(filename string) ([]byte, error)

Types

type DefaultObjectType

type DefaultObjectType int

const (
	DefaultObjectTypeSequence DefaultObjectType = iota
	DefaultObjectTypeMapping
)

type DefaultWriteDiffOpts

type DefaultWriteDiffOpts struct {
	From Object
	WriteDiffOpts
	ExcludeFilesPatterns []string
}

type ErrParsingMetadataObject

type ErrParsingMetadataObject interface {
	// ObjectName corresponds to metadata object in JSON format
	// eg: source, api_limits etc
	ObjectName() string
	// Filename corresponding to metadata object
	// eg: databases.yaml, actions.yaml
	Filename() string
	// ErrorContext will contain any additional information regarding error
	ErrorContext() string

	// Unwrap will make sure the error returned is unwrappable
	// https://blog.golang.org/go1.13-errors#TOC_3.1.
	Unwrap() error
	error
}

func DefaultExport

func DefaultExport(object Object, metadata map[string]yaml.Node, errorFunc func(error, ...string) ErrParsingMetadataObject, objectType DefaultObjectType) (map[string][]byte, ErrParsingMetadataObject)

DefaultExport is an implementation for Object.Export metadata objects which doesn't require additional customisations can make use of this implementation

func NewErrParsingMetadataObject

func NewErrParsingMetadataObject(o Object, err error, context ...string) ErrParsingMetadataObject

type Object

type Object interface {
	// Build will be responsible for reading the metadata object from metadata files in project directory
	// It should return nil if it was not able to find the matching metadata file
	// Build returns a map of the objects, and it's corresponding unmarshalled content
	// For example:
	// an implementation for handling the "remote_schemas" object might return a map like
	// "remote_schemas": []yaml.Node
	// since there is a chance that this function can return a yaml.Node. The return value is not expected to
	// directly be unmarshalled to JSON using json.Marshal
	Build() (map[string]interface{}, ErrParsingMetadataObject)
	// Export is responsible for writing the yaml Node(s) for the metadata object
	// to project directory
	// Export expects a map[string]yaml.Node specifically rather than a builtin data structure like
	// map[string]interface{} because it does not guarantee the order in which contents will be unmarshalled.
	// eg: say we received the following JSON metadata from the server
	// {
	//		"foo": [
	//			"x": 1,
	//			"a": 2,
	//		],
	// }
	// we are interested in preserving the order of keys when transforming this to YAML. Something like the following
	// foo:
	// 	x: 1
	// 	a: 2
	// This ordering is not guaranteed if we are using map[string]interface{} to unmarshal the JSON. This might look
	// something like the following
	// foo:
	// 	a: 2
	// 	x: 1
	// This not bug, since JSON spec doesn't guarantee the ordering anyway.
	// We are interested in writing or transforming the JSON object received from the server in
	// the same order to YAML files. This coupled with our requirement of NOT strongly typing metadata on CLI requires
	// using yaml.Node to preserve the ordering.
	Export(metadata map[string]yaml.Node) (map[string][]byte, ErrParsingMetadataObject)
	CreateFiles() error
	// GetFiles will return an array of file paths which make up the metadata object.
	// For example the "sources" metadata key is made up of files like
	// databases.yaml. which then will have !include tags which will branch to include
	// files like databases/<source-name>/tables/tables.yaml
	// this function is expected to return the list of all these files which make up the metadata object
	GetFiles() ([]string, ErrParsingMetadataObject)
	// WriteDiff should be implemented such that it should write the difference
	// between the current object and passed in object on the provided writer
	WriteDiff(WriteDiffOpts) ErrParsingMetadataObject
	Key() string
	Filename() string
	// BaseDirectory will return the parent directory of `Filename()`
	BaseDirectory() string
}

type Objects

type Objects []Object

type WriteDiffOpts

type WriteDiffOpts struct {
	To           Object
	W            io.Writer
	DisableColor bool
}