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Merge branch 'main' into online-ddl-vrepl-suite-non-utf8
Signed-off-by: Shlomi Noach <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| /* | ||
| Copyright 2021 The Vitess Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package flagutil | ||
|
|
||
| import ( | ||
| "flag" | ||
| "strings" | ||
|
|
||
| "github.com/spf13/pflag" | ||
| "k8s.io/apimachinery/pkg/util/sets" | ||
| ) | ||
|
|
||
| var ( | ||
| _ flag.Value = (*StringSetFlag)(nil) | ||
| _ pflag.Value = (*StringSetFlag)(nil) | ||
| ) | ||
|
|
||
| // StringSetFlag can be used to collect multiple instances of a flag into a set | ||
| // of values. | ||
| // | ||
| // For example, defining the following: | ||
| // | ||
| // var x flagutil.StringSetFlag | ||
| // flag.Var(&x, "foo", "") | ||
| // | ||
| // And then specifying "-foo x -foo y -foo x", will result in a set of {x, y}. | ||
| // | ||
| // In addition to implemnting the standard flag.Value interface, it also | ||
| // provides an implementation of pflag.Value, so it is usable in libraries like | ||
| // cobra. | ||
| type StringSetFlag struct { | ||
| set sets.String | ||
| } | ||
|
|
||
| // ToSet returns the underlying string set, or an empty set if the underlying | ||
| // set is nil. | ||
| func (set *StringSetFlag) ToSet() sets.String { | ||
| if set.set == nil { | ||
| set.set = sets.NewString() | ||
| } | ||
|
|
||
| return set.set | ||
| } | ||
|
|
||
| // Set is part of the pflag.Value and flag.Value interfaces. | ||
| func (set *StringSetFlag) Set(s string) error { | ||
| if set.set == nil { | ||
| set.set = sets.NewString(s) | ||
| return nil | ||
| } | ||
|
|
||
| set.set.Insert(s) | ||
| return nil | ||
| } | ||
|
|
||
| // String is part of the pflag.Value and flag.Value interfaces. | ||
| func (set *StringSetFlag) String() string { | ||
| if set.set == nil { | ||
| return "" | ||
| } | ||
|
|
||
| return strings.Join(set.set.List(), ", ") | ||
| } | ||
|
|
||
| // Type is part of the pflag.Value interface. | ||
| func (set *StringSetFlag) Type() string { return "StringSetFlag" } |
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