Refactor canary config command (#1370)

pkg/fission-cli/cmd/canaryconfig/get.go

@@ -0,0 +1,61 @@
+/*
+Copyright 2019 The Fission 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 canaryconfig
+
+import (
+	"fmt"
+	"os"
+	"text/tabwriter"
+
+	"github.com/pkg/errors"
+
+	"github.com/fission/fission/pkg/controller/client"
+	"github.com/fission/fission/pkg/fission-cli/cliwrapper/cli"
+	"github.com/fission/fission/pkg/fission-cli/cmd"
+)
+
+type GetSubCommand struct {
+	client *client.Client
+}
+
+func Get(flags cli.Input) error {
+	opts := GetSubCommand{
+		client: cmd.GetServer(flags),
+	}
+	return opts.run(flags)
+}
+
+func (opts *GetSubCommand) run(flags cli.Input) error {
+	m, err := cmd.GetMetadata("name", "canaryNamespace", flags)
+	if err != nil {
+		return err
+	}
+
+	canaryCfg, err := opts.client.CanaryConfigGet(m)
+	if err != nil {
+		return errors.Wrap(err, "error getting canary config")
+	}
+
+	w := tabwriter.NewWriter(os.Stdout, 0, 0, 1, ' ', 0)
+	fmt.Fprintf(w, "%v\t%v\t%v\t%v\t%v\t%v\t%v\t%v\t%v\n", "NAME", "TRIGGER", "FUNCTION-N", "FUNCTION-N-1", "WEIGHT-INCREMENT", "INTERVAL", "FAILURE-THRESHOLD", "FAILURE-TYPE", "STATUS")
+	fmt.Fprintf(w, "%v\t%v\t%v\t%v\t%v\t%v\t%v\t%v\t%v\n",
+		canaryCfg.Metadata.Name, canaryCfg.Spec.Trigger, canaryCfg.Spec.NewFunction, canaryCfg.Spec.OldFunction, canaryCfg.Spec.WeightIncrement, canaryCfg.Spec.WeightIncrementDuration,
+		canaryCfg.Spec.FailureThreshold, canaryCfg.Spec.FailureType, canaryCfg.Status.Status)
+
+	w.Flush()
+	return nil
+}