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// Copyright 2024 Google LLC
//
// 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 features
import (
"bufio"
"bytes"
"context"
"strings"
"github.com/google/yamlfmt"
)
func MakeFeatureTrimTrailingWhitespace(linebreakStr string) yamlfmt.Feature {
return yamlfmt.Feature{
Name: "Trim Trailing Whitespace",
BeforeAction: trimTrailingWhitespaceFeature(linebreakStr),
}
}
func trimTrailingWhitespaceFeature(linebreakStr string) yamlfmt.FeatureFunc {
return func(_ context.Context, content []byte) (context.Context, []byte, error) {
buf := bytes.NewBuffer(content)
s := bufio.NewScanner(buf)
newLines := []string{}
for s.Scan() {
newLines = append(newLines, strings.TrimRight(s.Text(), " "))
}
return nil, []byte(strings.Join(newLines, linebreakStr)), nil
}
}
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