printers

package
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 Go to latest Published: Sep 23, 2020 License: Apache-2.0 Imports: 23 Imported by: 0

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Constants

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Variables

This section is empty.

Functions

func AppendAllLabels 

func AppendAllLabels(showLabels bool, itemLabels map[string]string) string

Append all labels to a single column. We need this even when show-labels flag* is false, since this adds newline delimiter to the end of each row.

func AppendLabels 

func AppendLabels(itemLabels map[string]string, columnLabels []string) string

func DecorateTable 

func DecorateTable(table *metav1alpha1.Table, options PrintOptions) error

DecorateTable takes a table and attempts to add label columns and the namespace column. It will fill empty columns with nil (if the object does not expose metadata). It returns an error if the table cannot be decorated.

func FormatResourceName 

func FormatResourceName(kind, name string, withKind bool) string

FormatResourceName receives a resource kind, name, and boolean specifying whether or not to update the current name to "kind/name"

func GetNewTabWriter 

func GetNewTabWriter(output io.Writer) *tabwriter.Writer

GetNewTabWriter returns a tabwriter that translates tabbed columns in input into properly aligned text.

func PrintTable 

func PrintTable(table *metav1alpha1.Table, output io.Writer, options PrintOptions) error

PrintTable prints a table to the provided output respecting the filtering rules for options for wide columns and filetred rows. It filters out rows that are Completed. You should call DecorateTable if you receive a table from a remote server before calling PrintTable.

func RelaxedJSONPathExpression 

func RelaxedJSONPathExpression(pathExpression string) (string, error)

RelaxedJSONPathExpression attempts to be flexible with JSONPath expressions, it accepts:

  • metadata.name (no leading '.' or curly brances '{...}'
  • {metadata.name} (no leading '.')
  • .metadata.name (no curly braces '{...}')
  • {.metadata.name} (complete expression)

And transforms them all into a valid jsonpath expression: 

{.metadata.name}

func ShortHumanDuration 

func ShortHumanDuration(d time.Duration) string

func ValidatePrintHandlerFunc 

func ValidatePrintHandlerFunc(printFunc reflect.Value) error

ValidatePrintHandlerFunc validates print handler signature. printFunc is the function that will be called to print an object. It must be of the following type: 

func printFunc(object ObjectType, w io.Writer, options PrintOptions) error

where ObjectType is the type of the object that will be printed. DEPRECATED: will be replaced with ValidateRowPrintHandlerFunc

func ValidateRowPrintHandlerFunc 

func ValidateRowPrintHandlerFunc(printFunc reflect.Value) error

ValidateRowPrintHandlerFunc validates print handler signature. printFunc is the function that will be called to print an object. It must be of the following type: 

func printFunc(object ObjectType, options PrintOptions) ([]metav1alpha1.TableRow, error)

where ObjectType is the type of the object that will be printed, and the first return value is an array of rows, with each row containing a number of cells that match the number of columns defined for that printer function.

Types

type Column 

type Column struct {
	// The header to print above the column, general style is ALL_CAPS
	Header string
	// The pointer to the field in the object to print in JSONPath form
	// e.g. {.ObjectMeta.Name}, see pkg/util/jsonpath for more details.
	FieldSpec string
}

Column represents a user specified column

type CustomColumnsPrinter 

type CustomColumnsPrinter struct {
	Columns   []Column
	Decoder   runtime.Decoder
	NoHeaders bool
	// contains filtered or unexported fields
}

CustomColumnPrinter is a printer that knows how to print arbitrary columns of data from templates specified in the `Columns` array

func NewCustomColumnsPrinterFromSpec 

func NewCustomColumnsPrinterFromSpec(spec string, decoder runtime.Decoder, noHeaders bool) (*CustomColumnsPrinter, error)

NewCustomColumnsPrinterFromSpec creates a custom columns printer from a comma separated list of <header>:<jsonpath-field-spec> pairs. e.g. NAME:metadata.name,API_VERSION:apiVersion creates a printer that prints: 

NAME               API_VERSION
foo                bar

func NewCustomColumnsPrinterFromTemplate 

func NewCustomColumnsPrinterFromTemplate(templateReader io.Reader, decoder runtime.Decoder) (*CustomColumnsPrinter, error)

NewCustomColumnsPrinterFromTemplate creates a custom columns printer from a template stream. The template is expected to consist of two lines, whitespace separated. The first line is the header line, the second line is the jsonpath field spec For example, the template below: NAME API_VERSION {metadata.name} {apiVersion}

func (*CustomColumnsPrinter) AfterPrint 

func (s *CustomColumnsPrinter) AfterPrint(w io.Writer, res string) error

func (*CustomColumnsPrinter) HandledResources 

func (s *CustomColumnsPrinter) HandledResources() []string

func (*CustomColumnsPrinter) IsGeneric 

func (s *CustomColumnsPrinter) IsGeneric() bool

func (*CustomColumnsPrinter) PrintObj 

func (s *CustomColumnsPrinter) PrintObj(obj runtime.Object, out io.Writer) error

type Describer 

type Describer interface {
	Describe(namespace, name string, describerSettings DescriberSettings) (output string, err error)
}

Describer generates output for the named resource or an error if the output could not be generated. Implementers typically abstract the retrieval of the named object from a remote server.

type DescriberSettings 

type DescriberSettings struct {
	ShowEvents bool
}

DescriberSettings holds display configuration for each object describer to control what is printed.

type ErrNoDescriber 

type ErrNoDescriber struct {
	Types []string
}

ErrNoDescriber is a structured error indicating the provided object or objects cannot be described.

func (ErrNoDescriber) Error 

func (e ErrNoDescriber) Error() string

Error implements the error interface.

type HumanReadablePrinter 

type HumanReadablePrinter struct {
	// contains filtered or unexported fields
}

HumanReadablePrinter is an implementation of ResourcePrinter which attempts to provide more elegant output. It is not threadsafe, but you may call PrintObj repeatedly; headers will only be printed if the object type changes. This makes it useful for printing items received from watches.

func NewHumanReadablePrinter 

func NewHumanReadablePrinter(encoder runtime.Encoder, decoder runtime.Decoder, options PrintOptions) *HumanReadablePrinter

NewHumanReadablePrinter creates a HumanReadablePrinter. If encoder and decoder are provided, an attempt to convert unstructured types to internal types is made.

func NewTablePrinter 

func NewTablePrinter() *HumanReadablePrinter

NewTablePrinter creates a HumanReadablePrinter suitable for calling PrintTable().

func (*HumanReadablePrinter) AddTabWriter 

func (a *HumanReadablePrinter) AddTabWriter(t bool) *HumanReadablePrinter

AddTabWriter sets whether the PrintObj function will format with tabwriter (true by default).

func (*HumanReadablePrinter) AfterPrint 

func (h *HumanReadablePrinter) AfterPrint(output io.Writer, res string) error

func (*HumanReadablePrinter) DefaultTableHandler 

func (h *HumanReadablePrinter) DefaultTableHandler(columnDefinitions []metav1alpha1.TableColumnDefinition, printFunc interface{}) error

DefaultTableHandler registers a set of columns and a print func that is given a chance to process any object without an explicit handler. Only the most recently set print handler is used. See ValidateRowPrintHandlerFunc for required method signature.

func (*HumanReadablePrinter) EnsurePrintHeaders 

func (h *HumanReadablePrinter) EnsurePrintHeaders()

EnsurePrintHeaders sets the HumanReadablePrinter option "NoHeaders" to false and removes the .lastType that was printed, which forces headers to be printed in cases where multiple lists of the same resource are printed consecutively, but are separated by non-printer related information.

func (*HumanReadablePrinter) EnsurePrintWithKind 

func (h *HumanReadablePrinter) EnsurePrintWithKind(kind string)

EnsurePrintWithKind sets HumanReadablePrinter options "WithKind" to true and "Kind" to the string arg it receives, pre-pending this string to the "NAME" column in an output of resources.

func (*HumanReadablePrinter) GetResourceKind 

func (h *HumanReadablePrinter) GetResourceKind() string

GetResourceKind returns the type currently set for a resource

func (*HumanReadablePrinter) HandledResources 

func (h *HumanReadablePrinter) HandledResources() []string

func (*HumanReadablePrinter) Handler 

func (h *HumanReadablePrinter) Handler(columns, columnsWithWide []string, printFunc interface{}) error

Handler adds a print handler with a given set of columns to HumanReadablePrinter instance. See ValidatePrintHandlerFunc for required method signature.

func (*HumanReadablePrinter) IsGeneric 

func (h *HumanReadablePrinter) IsGeneric() bool

func (*HumanReadablePrinter) PrintObj 

func (h *HumanReadablePrinter) PrintObj(obj runtime.Object, output io.Writer) error

PrintObj prints the obj in a human-friendly format according to the type of the obj. TODO: unify the behavior of PrintObj, which often expects single items and tracks headers and filtering, with other printers, that expect list objects. The tracking behavior should probably be a higher level wrapper (MultiObjectTablePrinter) that calls into the PrintTable method and then displays consistent output.

func (*HumanReadablePrinter) PrintTable 

func (h *HumanReadablePrinter) PrintTable(obj runtime.Object, options PrintOptions) (*metav1alpha1.Table, error)

PrintTable returns a table for the provided object, using the printer registered for that type. It returns a table that includes all of the information requested by options, but will not remove rows or columns. The caller is responsible for applying rules related to filtering rows or columns.

func (*HumanReadablePrinter) TableHandler 

func (h *HumanReadablePrinter) TableHandler(columnDefinitions []metav1alpha1.TableColumnDefinition, printFunc interface{}) error

TableHandler adds a print handler with a given set of columns to HumanReadablePrinter instance. See ValidateRowPrintHandlerFunc for required method signature.

func (*HumanReadablePrinter) With 

func (a *HumanReadablePrinter) With(fns ...func(PrintHandler)) *HumanReadablePrinter

type JSONPathPrinter 

type JSONPathPrinter struct {
	*jsonpath.JSONPath
	// contains filtered or unexported fields
}

JSONPathPrinter is an implementation of ResourcePrinter which formats data with jsonpath expression.

func NewJSONPathPrinter 

func NewJSONPathPrinter(tmpl string) (*JSONPathPrinter, error)

func (*JSONPathPrinter) AfterPrint 

func (j *JSONPathPrinter) AfterPrint(w io.Writer, res string) error

func (*JSONPathPrinter) HandledResources 

func (p *JSONPathPrinter) HandledResources() []string

TODO: implement HandledResources()

func (*JSONPathPrinter) IsGeneric 

func (p *JSONPathPrinter) IsGeneric() bool

func (*JSONPathPrinter) PrintObj 

func (j *JSONPathPrinter) PrintObj(obj runtime.Object, w io.Writer) error

PrintObj formats the obj with the JSONPath Template.

type JSONPrinter 

type JSONPrinter struct {
}

JSONPrinter is an implementation of ResourcePrinter which outputs an object as JSON.

func (*JSONPrinter) AfterPrint 

func (p *JSONPrinter) AfterPrint(w io.Writer, res string) error

func (*JSONPrinter) HandledResources 

func (p *JSONPrinter) HandledResources() []string

TODO: implement HandledResources()

func (*JSONPrinter) IsGeneric 

func (p *JSONPrinter) IsGeneric() bool

func (*JSONPrinter) PrintObj 

func (p *JSONPrinter) PrintObj(obj runtime.Object, w io.Writer) error

PrintObj is an implementation of ResourcePrinter.PrintObj which simply writes the object to the Writer.

type NamePrinter 

type NamePrinter struct {
	Decoders []runtime.Decoder
	Typer    runtime.ObjectTyper
	Mapper   meta.RESTMapper
}

NamePrinter is an implementation of ResourcePrinter which outputs "resource/name" pair of an object.

func (*NamePrinter) AfterPrint 

func (p *NamePrinter) AfterPrint(w io.Writer, res string) error

func (*NamePrinter) HandledResources 

func (p *NamePrinter) HandledResources() []string

TODO: implement HandledResources()

func (*NamePrinter) IsGeneric 

func (p *NamePrinter) IsGeneric() bool

func (*NamePrinter) PrintObj 

func (p *NamePrinter) PrintObj(obj runtime.Object, w io.Writer) error

PrintObj is an implementation of ResourcePrinter.PrintObj which decodes the object and print "resource/name" pair. If the object is a List, print all items in it.

type ObjectDescriber 

type ObjectDescriber interface {
	DescribeObject(object interface{}, extra ...interface{}) (output string, err error)
}

ObjectDescriber is an interface for displaying arbitrary objects with extra information. Use when an object is in hand (on disk, or already retrieved). Implementers may ignore the additional information passed on extra, or use it by default. ObjectDescribers may return ErrNoDescriber if no suitable describer is found.

type PrintHandler 

type PrintHandler interface {
	Handler(columns, columnsWithWide []string, printFunc interface{}) error
	TableHandler(columns []metav1alpha1.TableColumnDefinition, printFunc interface{}) error
	DefaultTableHandler(columns []metav1alpha1.TableColumnDefinition, printFunc interface{}) error
}

type PrintOptions 

type PrintOptions struct {
	// supported Format types can be found in pkg/printers/printers.go
	OutputFormatType     string
	OutputFormatArgument string

	NoHeaders          bool
	WithNamespace      bool
	WithKind           bool
	Wide               bool
	ShowAll            bool
	ShowLabels         bool
	AbsoluteTimestamps bool
	Kind               string
	ColumnLabels       []string

	SortBy string

	// indicates if it is OK to ignore missing keys for rendering an output template.
	AllowMissingKeys bool
}

type ResourcePrinter 

type ResourcePrinter interface {
	// Print receives a runtime object, formats it and prints it to a writer.
	PrintObj(runtime.Object, io.Writer) error
	HandledResources() []string
	//Can be used to print out warning/clarifications if needed
	//after all objects were printed
	AfterPrint(io.Writer, string) error
	// Identify if it is a generic printer
	IsGeneric() bool
}

ResourcePrinter is an interface that knows how to print runtime objects.

func GetStandardPrinter 

func GetStandardPrinter(mapper meta.RESTMapper, typer runtime.ObjectTyper, encoder runtime.Encoder, decoders []runtime.Decoder, options PrintOptions) (ResourcePrinter, error)

GetStandardPrinter takes a format type, an optional format argument. It will return a printer or an error. The printer is agnostic to schema versions, so you must send arguments to PrintObj in the version you wish them to be shown using a VersionedPrinter (typically when generic is true).

func NewVersionedPrinter 

func NewVersionedPrinter(printer ResourcePrinter, converter runtime.ObjectConvertor, versions ...schema.GroupVersion) ResourcePrinter

NewVersionedPrinter wraps a printer to convert objects to a known API version prior to printing.

type ResourcePrinterFunc 

type ResourcePrinterFunc func(runtime.Object, io.Writer) error

ResourcePrinterFunc is a function that can print objects

func (ResourcePrinterFunc) AfterPrint 

func (fn ResourcePrinterFunc) AfterPrint(io.Writer, string) error

func (ResourcePrinterFunc) HandledResources 

func (fn ResourcePrinterFunc) HandledResources() []string

TODO: implement HandledResources()

func (ResourcePrinterFunc) IsGeneric 

func (fn ResourcePrinterFunc) IsGeneric() bool

func (ResourcePrinterFunc) PrintObj 

func (fn ResourcePrinterFunc) PrintObj(obj runtime.Object, w io.Writer) error

PrintObj implements ResourcePrinter

type TablePrinter 

type TablePrinter interface {
	PrintTable(obj runtime.Object, options PrintOptions) (*metav1alpha1.Table, error)
}

type TemplatePrinter 

type TemplatePrinter struct {
	// contains filtered or unexported fields
}

TemplatePrinter is an implementation of ResourcePrinter which formats data with a Go Template.

func NewTemplatePrinter 

func NewTemplatePrinter(tmpl []byte) (*TemplatePrinter, error)

func (*TemplatePrinter) AfterPrint 

func (p *TemplatePrinter) AfterPrint(w io.Writer, res string) error

func (*TemplatePrinter) AllowMissingKeys 

func (p *TemplatePrinter) AllowMissingKeys(allow bool)

AllowMissingKeys tells the template engine if missing keys are allowed.

func (*TemplatePrinter) HandledResources 

func (p *TemplatePrinter) HandledResources() []string

TODO: implement HandledResources()

func (*TemplatePrinter) IsGeneric 

func (p *TemplatePrinter) IsGeneric() bool

func (*TemplatePrinter) PrintObj 

func (p *TemplatePrinter) PrintObj(obj runtime.Object, w io.Writer) error

PrintObj formats the obj with the Go Template.

type VersionedPrinter 

type VersionedPrinter struct {
	// contains filtered or unexported fields
}

VersionedPrinter takes runtime objects and ensures they are converted to a given API version prior to being passed to a nested printer.

func (*VersionedPrinter) AfterPrint 

func (p *VersionedPrinter) AfterPrint(w io.Writer, res string) error

func (*VersionedPrinter) HandledResources 

func (p *VersionedPrinter) HandledResources() []string

TODO: implement HandledResources()

func (*VersionedPrinter) IsGeneric 

func (p *VersionedPrinter) IsGeneric() bool

func (*VersionedPrinter) PrintObj 

func (p *VersionedPrinter) PrintObj(obj runtime.Object, w io.Writer) error

PrintObj implements ResourcePrinter

type YAMLPrinter 

type YAMLPrinter struct {
	// contains filtered or unexported fields
}

YAMLPrinter is an implementation of ResourcePrinter which outputs an object as YAML. The input object is assumed to be in the internal version of an API and is converted to the given version first.

func (*YAMLPrinter) AfterPrint 

func (p *YAMLPrinter) AfterPrint(w io.Writer, res string) error

func (*YAMLPrinter) HandledResources 

func (p *YAMLPrinter) HandledResources() []string

TODO: implement HandledResources()

func (*YAMLPrinter) IsGeneric 

func (p *YAMLPrinter) IsGeneric() bool

func (*YAMLPrinter) PrintObj 

func (p *YAMLPrinter) PrintObj(obj runtime.Object, w io.Writer) error

PrintObj prints the data as YAML.

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