| // Copyright 2020 The Monogon Project Authors. |
| // |
| // SPDX-License-Identifier: Apache-2.0 |
| // |
| // 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" |
| "io" |
| "log" |
| "os" |
| |
| "source.monogon.dev/metropolis/pkg/logbuffer" |
| ) |
| |
| // prefixedStdout is a os.Stdout proxy that prefixes every line with a constant |
| // prefix. This is used to show logs from two Metropolis nodes without getting |
| // them confused. |
| // TODO(q3k): move to logging API instead of relying on qemu stdout, and remove |
| // this function. |
| func prefixedStdout(prefix string) io.ReadWriter { |
| lb := logbuffer.NewLineBuffer(2048, func(l *logbuffer.Line) { |
| fmt.Fprintf(os.Stdout, "%s%s\n", prefix, l.Data) |
| }) |
| // Make a ReaderWriter from LineBuffer (a Reader), by combining into an |
| // anonymous struct with a io.MultiReader() (which will always return EOF |
| // on every Read if given no underlying readers). |
| return struct { |
| io.Reader |
| io.Writer |
| }{ |
| Reader: io.MultiReader(), |
| Writer: lb, |
| } |
| } |
| |
| func main() { |
| log.Fatal("unimplemented") |
| } |