mirror of https://github.com/docker/compose.git
116 lines
2.6 KiB
Go
116 lines
2.6 KiB
Go
/*
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Copyright 2020 Docker Compose CLI authors
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package formatter
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import (
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"context"
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"fmt"
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"io"
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"strconv"
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"strings"
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"github.com/docker/compose-cli/pkg/api"
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)
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// NewLogConsumer creates a new LogConsumer
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func NewLogConsumer(ctx context.Context, w io.Writer, color bool, prefix bool) api.LogConsumer {
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return &logConsumer{
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ctx: ctx,
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presenters: map[string]*presenter{},
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width: 0,
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writer: w,
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color: color,
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prefix: prefix,
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}
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}
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func (l *logConsumer) Register(name string) {
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l.register(name)
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}
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func (l *logConsumer) register(name string) *presenter {
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cf := monochrome
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if l.color {
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cf = nextColor()
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}
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p := &presenter{
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colors: cf,
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name: name,
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}
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l.presenters[name] = p
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if l.prefix {
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l.computeWidth()
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for _, p := range l.presenters {
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p.setPrefix(l.width)
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}
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}
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return p
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}
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// Log formats a log message as received from name/container
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func (l *logConsumer) Log(container, service, message string) {
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if l.ctx.Err() != nil {
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return
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}
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p, ok := l.presenters[container]
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if !ok { // should have been registered, but ¯\_(ツ)_/¯
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p = l.register(container)
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}
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for _, line := range strings.Split(message, "\n") {
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fmt.Fprintf(l.writer, "%s %s\n", p.prefix, line) // nolint:errcheck
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}
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}
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func (l *logConsumer) Status(container, msg string) {
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p, ok := l.presenters[container]
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if !ok {
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p = l.register(container)
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}
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s := p.colors(fmt.Sprintf("%s %s\n", container, msg))
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l.writer.Write([]byte(s)) // nolint:errcheck
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}
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func (l *logConsumer) computeWidth() {
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width := 0
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for _, p := range l.presenters {
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if len(p.name) > width {
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width = len(p.name)
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}
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}
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l.width = width + 1
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}
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// LogConsumer consume logs from services and format them
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type logConsumer struct {
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ctx context.Context
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presenters map[string]*presenter
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width int
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writer io.Writer
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color bool
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prefix bool
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}
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type presenter struct {
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colors colorFunc
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name string
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prefix string
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}
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func (p *presenter) setPrefix(width int) {
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p.prefix = p.colors(fmt.Sprintf("%-"+strconv.Itoa(width)+"s |", p.name))
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}
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