57e8ee4b51
This cleans up the CLI code significantly. Also makes some of this re-usable for providers who want to do so. This also removes the main.go from the top of the tree of the repro, instead moving it into cmd/virtual-kubelet. This allows us to better utilize the package namespace (and e.g. mv the `vkubelet` package to the top of the tree).
55 lines
1.6 KiB
Go
55 lines
1.6 KiB
Go
// Copyright © 2017 The virtual-kubelet authors
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package providers
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import (
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"fmt"
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"os"
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"github.com/spf13/cobra"
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"github.com/virtual-kubelet/virtual-kubelet/providers/register"
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)
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// NewCommand creates a new providers subcommand
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// This subcommand is used to determine which providers are registered.
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func NewCommand() *cobra.Command {
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return &cobra.Command{
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Use: "providers",
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Short: "Show the list of supported providers",
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Long: "Show the list of supported providers",
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Args: cobra.MaximumNArgs(2),
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Run: func(cmd *cobra.Command, args []string) {
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switch len(args) {
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case 0:
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ls := register.List()
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for _, p := range ls {
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fmt.Fprintln(cmd.OutOrStdout(), p)
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}
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case 1:
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if !register.Exists(args[0]) {
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fmt.Fprintln(cmd.OutOrStderr(), "no such provider", args[0])
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// TODO(@cpuuy83): would be nice to not short-circuit the exit here
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// But at the momemt this seems to be the only way to exit non-zero and
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// handle our own error output
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os.Exit(1)
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}
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fmt.Fprintln(cmd.OutOrStdout(), args[0])
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}
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return
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},
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}
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}
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