mirror of https://github.com/hashicorp/packer
Megan Marsh
7 years ago
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The MIT License (MIT)
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Copyright (c) 2015 Mitchell Hashimoto
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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# iochan
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iochan is a Go library for treating `io` readers and writers like channels.
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This is useful when sometimes you wish to use `io.Reader` and such in `select`
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statements.
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## Installation
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Standard `go get`:
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```
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$ go get github.com/mitchellh/iochan
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```
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module github.com/mitchellh/iochan
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package iochan
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import (
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"bufio"
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"io"
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)
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// DelimReader takes an io.Reader and produces the contents of the reader
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// on the returned channel. The contents on the channel will be returned
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// on boundaries specified by the delim parameter, and will include this
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// delimiter.
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//
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// If an error occurs while reading from the reader, the reading will end.
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//
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// In the case of an EOF or error, the channel will be closed.
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//
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// This must only be called once for any individual reader. The behavior is
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// unknown and will be unexpected if this is called multiple times with the
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// same reader.
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func DelimReader(r io.Reader, delim byte) <-chan string {
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ch := make(chan string)
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go func() {
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buf := bufio.NewReader(r)
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for {
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line, err := buf.ReadString(delim)
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if line != "" {
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ch <- line
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}
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if err != nil {
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break
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}
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}
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close(ch)
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}()
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return ch
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}
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