Allow to change the default log level

pkg/output/logging/context.go

@@ -126,7 +126,7 @@ func createDefaultLogger(ctx context.Context) *zap.Logger {
 	ec.EncodeTime = ElapsedMillisTimeEncoder(time.Now())
 	ec.ConsoleSeparator = " "
 
-	lvl := activeLogLevel(zapcore.WarnLevel)
+	lvl := activeLogLevel(LogLevelFromContext(ctx))
 	logger := zap.New(zapcore.NewCore(
 		zapcore.NewConsoleEncoder(ec),
 		zapcore.AddSync(errout),

pkg/output/logging/log_level.go

@@ -0,0 +1,43 @@
+/*
+ Copyright 2024 The Knative Authors
+
+ 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 logging
+
+import (
+	"context"
+
+	"go.uber.org/zap/zapcore"
+	pkgcontext "knative.dev/client/pkg/context"
+)
+
+var logLevelKey = struct{}{}
+
+// LogLevelFromContext returns the default log level for the logger.
+func LogLevelFromContext(ctx context.Context) zapcore.Level {
+	if val, ok := ctx.Value(logLevelKey).(zapcore.Level); ok {
+		return val
+	} else {
+		if pkgcontext.TestingTFromContext(ctx) != nil {
+			return zapcore.DebugLevel
+		}
+		return zapcore.WarnLevel
+	}
+}
+
+// WithLogLevel will set given log level as the default one in given context.
+func WithLogLevel(ctx context.Context, level zapcore.Level) context.Context {
+	return context.WithValue(ctx, logLevelKey, level)
+}

pkg/output/logging/log_level_test.go

@@ -0,0 +1,36 @@
+/*
+ Copyright 2024 The Knative Authors
+
+ 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 logging_test
+
+import (
+	"context"
+	"testing"
+
+	"go.uber.org/zap/zapcore"
+	"gotest.tools/v3/assert"
+	pkgcontext "knative.dev/client/pkg/context"
+	"knative.dev/client/pkg/output/logging"
+)
+
+func TestLogLevel(t *testing.T) {
+	ctx := context.TODO()
+	assert.Equal(t, zapcore.WarnLevel, logging.LogLevelFromContext(ctx))
+	ctx = pkgcontext.WithTestingT(ctx, t)
+	assert.Equal(t, zapcore.DebugLevel, logging.LogLevelFromContext(ctx))
+	ctx = logging.WithLogLevel(ctx, zapcore.InfoLevel)
+	assert.Equal(t, zapcore.InfoLevel, logging.LogLevelFromContext(ctx))
+}