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flags.go
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flags.go
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// Copyright 2017 The Bazel Authors. All rights reserved.
//
// 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 main
import (
"fmt"
"go/build"
"strings"
)
// multiFlag allows repeated string flags to be collected into a slice
type multiFlag []string
func (m *multiFlag) String() string {
if len(*m) == 0 {
return ""
}
return fmt.Sprint(*m)
}
func (m *multiFlag) Set(v string) error {
(*m) = append(*m, v)
return nil
}
// tagFlag adds tags to the build.Default context. Tags are expected to be
// formatted as a comma-separated list.
type tagFlag struct{}
func (f *tagFlag) String() string {
return strings.Join(build.Default.BuildTags, ",")
}
func (f *tagFlag) Set(opt string) error {
tags := strings.Split(opt, ",")
build.Default.BuildTags = append(build.Default.BuildTags, tags...)
return nil
}