mirror of https://github.com/harness/drone.git
53 lines
1.3 KiB
Go
53 lines
1.3 KiB
Go
// Copyright 2023 Harness, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package git
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import "io"
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// StreamReader is a helper utility to ease reading from streaming channel pair (the data and the error channel).
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type StreamReader[T any] struct {
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chData <-chan T
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chErr <-chan error
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}
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// NewStreamReader creates new StreamReader.
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func NewStreamReader[T any](chData <-chan T, chErr <-chan error) *StreamReader[T] {
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return &StreamReader[T]{
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chData: chData,
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chErr: chErr,
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}
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}
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// Next returns the next element or error.
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// In case the end has been reached, an io.EOF is returned.
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func (str *StreamReader[T]) Next() (T, error) {
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var null T
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select {
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case data, ok := <-str.chData:
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if !ok {
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return null, io.EOF
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}
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return data, nil
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case err, ok := <-str.chErr:
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if !ok {
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return null, io.EOF
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}
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return null, err
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}
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}
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