Documentation
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Overview ¶
Package flag provides the utilities for implementing command line flags.
Index ¶
- func BoolSlice(b *[]bool) flag.Getter
- func CommaList(s *[]string) flag.Getter
- func Date(t *time.Time) flag.Getter
- func FieldSlice(f *[]googleapi.Field) flag.Getter
- func GRPCMetadata(md metadata.MD) flag.Getter
- func Int32(i *int32) flag.Getter
- func Int64Slice(i *[]int64) flag.Getter
- func JSONMap(m *map[string]string) flag.Value
- func MessageSliceFlag(msgSlicePtr interface{}) flag.Getter
- func StringMap(m map[string]string) flag.Getter
- func StringPairs(m strpair.Map) flag.Getter
- func StringSlice(s *[]string) flag.Getter
- func Time(t *time.Time) flag.Getter
- func TimeLayout(t *time.Time, layout string) flag.Getter
- type Choice
- type RelativeTime
Examples ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func CommaList ¶
CommaList returns a flag.Getter for parsing a comma separated flag argument into a string slice.
func Date ¶
Date returns a flag.Getter which parses the flag value as a UTC date. The string must be a time with layout "2006-01-24".
func FieldSlice ¶
FieldSlice returns a flag.Getter which reads flags into the given []googleapi.Field pointer.
func GRPCMetadata ¶
GRPCMetadata returns a flag.Getter for parsing gRPC metadata from a a set of colon-separated strings. Example: -f a:1 -f a:2 -f b:3 Panics if md is nil.
func Int64Slice ¶
Int64Slice returns a flag.Getter which reads flags into the given []int64 pointer.
func JSONMap ¶
JSONMap returns a flag.Value that can be passed to flag.Var to parse a JSON string into a map.
func MessageSliceFlag ¶
MessageSliceFlag returns a new flag for a slice of pointer to concrete proto message struct which implements the proto.Message interface. Expect input to be of type *[]*B where B is concrete struct of proto message like pb.Build. A flag value must be a JSON string of the provided concrete proto message.
Example ¶
var builds []*pb.Build
fs := flag.NewFlagSet("test", flag.ContinueOnError)
flag := MessageSliceFlag(&builds)
fs.Var(flag, "build", "Test Proto Message")
fs.Parse([]string{"-build",
"{\"id\": 111111, \"status\": \"SUCCESS\"}"})
marshaler := &jsonpb.Marshaler{Indent: " "}
jsonMsg, _ := marshaler.MarshalToString(builds[0])
fmt.Println(jsonMsg)
Output: { "id": "111111", "status": "SUCCESS" }
func StringMap ¶
StringMap returns a flag.Getter for parsing map[string]string from a a set of colon-separated strings. Example:
-f a:1 -f b:3
The flag.Getter.Set implementation returns an error if the key is already in the map. Panics if m is nil.
func StringPairs ¶
StringPairs returns a flag.Getter for parsing strpair.Map from a a set of colon-separated strings. Example:
-f a:1 -f a:2 -f b:3
Panics if m is nil.
func StringSlice ¶
StringSlice returns a flag.Getter which reads flags into the given []string pointer.
func Time ¶
Time returns a flag.Getter which parses a string into a time.Time pointer.
The timestamp to parse must be formatted as stiptime: https://chromium.googlesource.com/infra/infra/infra_libs/+/b2e2c9948c327b88b138d8bd60ec4bb3a957be78/time_functions/README.md
Caveat: Leap seconds are not supported due to a limitation in go's time library: https://github.com/golang/go/issues/15247
Types ¶
type Choice ¶
type Choice struct {
// contains filtered or unexported fields
}
Choice is an implementation of flag.Value for parsing a multiple-choice string.
type RelativeTime ¶
RelativeTime is an implementation of flag.Value for parsing a time by a relative day offset.
func (RelativeTime) Set ¶
func (f RelativeTime) Set(s string) error
Set implements the flag.Value interface.
func (RelativeTime) String ¶
func (f RelativeTime) String() string
String implements the flag.Value interface.
Source Files
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Directories
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| Path | Synopsis |
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Package flagenum is a utility package which facilitates implementation of flag.Value, json.Marshaler, and json.Unmarshaler interfaces via a string-to- value mapping.
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Package flagenum is a utility package which facilitates implementation of flag.Value, json.Marshaler, and json.Unmarshaler interfaces via a string-to- value mapping. |
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Package multiflag is a package providing a flag.Value implementation capable of switching between multiple registered sub-flags, each of which have their own set of parameter flags.
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Package multiflag is a package providing a flag.Value implementation capable of switching between multiple registered sub-flags, each of which have their own set of parameter flags. |
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Package stringlistflag provides a flag.Value implementation which resolves multiple args into a []string.
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Package stringlistflag provides a flag.Value implementation which resolves multiple args into a []string. |
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Package stringmapflag provides a flag.Value that, when parsed, augments a map[string]string with the supplied parameter.
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Package stringmapflag provides a flag.Value that, when parsed, augments a map[string]string with the supplied parameter. |
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Package stringsetflag provides a flag.Value implementation which resolves multiple args into a stringset.
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Package stringsetflag provides a flag.Value implementation which resolves multiple args into a stringset. |