Move packages to proejct/pkg to follow go project folder structure convention (#1190)

pkg/fission-cli/plugin.go

@@ -0,0 +1,50 @@
+/*
+Copyright 2016 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 fission_cli
+
+import (
+	"fmt"
+	"os"
+	"text/tabwriter"
+
+	"github.com/urfave/cli"
+
+	"github.com/fission/fission/pkg/fission-cli/plugin"
+)
+
+var cmdPlugin = cli.Command{
+	Name:    "plugin",
+	Aliases: []string{"plugins"},
+	Usage:   "Manage Fission CLI plugins",
+	Subcommands: []cli.Command{
+		{
+			Name:   "list",
+			Usage:  "List installed client plugins",
+			Action: pluginList,
+		},
+	},
+}
+
+func pluginList(_ *cli.Context) error {
+	w := tabwriter.NewWriter(os.Stdout, 0, 0, 1, ' ', 0)
+	fmt.Fprintln(w, "NAME\tVERSION\tPATH")
+	for _, p := range plugin.FindAll() {
+		fmt.Fprintf(w, "%v\t%v\t%v\n", p.Name, p.Version, p.Path)
+	}
+	w.Flush()
+	return nil
+}