mirror of https://github.com/knative/caching.git
53 lines
1.4 KiB
Go
53 lines
1.4 KiB
Go
/*
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Copyright 2019 The Knative 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 logstream
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import (
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"os"
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"knative.dev/pkg/system"
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"knative.dev/pkg/test"
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)
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// Canceler is the type of a function returned when a logstream is started to be
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// deferred so that the logstream can be stopped when the test is complete.
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type Canceler func()
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// Start begins streaming the logs from system components with a `key:` matching
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// `test.ObjectNameForTest(t)` to `t.Log`. It returns a Canceler, which must
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// be called before the test completes.
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func Start(t test.TLegacy) Canceler {
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return stream.Start(t)
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}
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type streamer interface {
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Start(t test.TLegacy) Canceler
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}
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var stream streamer
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func init() {
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ns := os.Getenv(system.NamespaceEnvKey)
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if ns != "" {
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// If SYSTEM_NAMESPACE is set, then start the stream.
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stream = &kubelogs{namespace: ns}
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} else {
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// Otherwise set up a null stream.
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stream = &null{}
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}
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}
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