yunion.io/x/cloudmux@v0.3.10-0-alpha.1/cmd/ncli/main.go (about)

     1  // Copyright 2019 Yunion
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package main
    16  
    17  import (
    18  	"fmt"
    19  	"net/http"
    20  	"net/url"
    21  	"os"
    22  
    23  	"golang.org/x/net/http/httpproxy"
    24  
    25  	"yunion.io/x/structarg"
    26  
    27  	"yunion.io/x/cloudmux/pkg/cloudprovider"
    28  	"yunion.io/x/cloudmux/pkg/multicloud/nutanix"
    29  	_ "yunion.io/x/cloudmux/pkg/multicloud/nutanix/shell"
    30  	"yunion.io/x/onecloud/pkg/util/shellutils"
    31  )
    32  
    33  type BaseOptions struct {
    34  	Debug      bool   `help:"debug mode"`
    35  	Host       string `help:"Host" default:"$NUTANIX_HOST" metavar:"NUTANIX_HOST"`
    36  	Username   string `help:"Username" default:"$NUTANIX_USERNAME" metavar:"NUTANIX_USERNAME"`
    37  	Password   string `help:"Password" default:"$NUTANIX_PASSWORD" metavar:"NUTANIX_PASSWORD"`
    38  	Port       int    `help:"Port" default:"$NUTANIX_PORT|9440" metavar:"NUTANIX_PORT"`
    39  	SUBCOMMAND string `help:"ncli subcommand" subcommand:"true"`
    40  }
    41  
    42  func getSubcommandParser() (*structarg.ArgumentParser, error) {
    43  	parse, e := structarg.NewArgumentParserWithHelp(&BaseOptions{},
    44  		"ncli",
    45  		"Command-line interface to nutanix API.",
    46  		`See "ncli COMMAND --help" for help on a specific command.`)
    47  
    48  	if e != nil {
    49  		return nil, e
    50  	}
    51  
    52  	subcmd := parse.GetSubcommand()
    53  	if subcmd == nil {
    54  		return nil, fmt.Errorf("No subcommand argument.")
    55  	}
    56  	for _, v := range shellutils.CommandTable {
    57  		_, e := subcmd.AddSubParserWithHelp(v.Options, v.Command, v.Desc, v.Callback)
    58  		if e != nil {
    59  			return nil, e
    60  		}
    61  	}
    62  	return parse, nil
    63  }
    64  
    65  func showErrorAndExit(e error) {
    66  	fmt.Fprintf(os.Stderr, "%s", e)
    67  	fmt.Fprintln(os.Stderr)
    68  	os.Exit(1)
    69  }
    70  
    71  func newClient(options *BaseOptions) (*nutanix.SRegion, error) {
    72  	if len(options.Host) == 0 {
    73  		return nil, fmt.Errorf("Missing host")
    74  	}
    75  
    76  	if len(options.Username) == 0 {
    77  		return nil, fmt.Errorf("Missing username")
    78  	}
    79  
    80  	if len(options.Password) == 0 {
    81  		return nil, fmt.Errorf("Missing password")
    82  	}
    83  
    84  	cfg := &httpproxy.Config{
    85  		HTTPProxy:  os.Getenv("HTTP_PROXY"),
    86  		HTTPSProxy: os.Getenv("HTTPS_PROXY"),
    87  		NoProxy:    os.Getenv("NO_PROXY"),
    88  	}
    89  	cfgProxyFunc := cfg.ProxyFunc()
    90  	proxyFunc := func(req *http.Request) (*url.URL, error) {
    91  		return cfgProxyFunc(req.URL)
    92  	}
    93  
    94  	cli, err := nutanix.NewNutanixClient(
    95  		nutanix.NewNutanixClientConfig(
    96  			options.Host,
    97  			options.Username,
    98  			options.Password,
    99  			options.Port,
   100  		).Debug(options.Debug).
   101  			CloudproviderConfig(
   102  				cloudprovider.ProviderConfig{
   103  					ProxyFunc: proxyFunc,
   104  				},
   105  			),
   106  	)
   107  	if err != nil {
   108  		return nil, err
   109  	}
   110  
   111  	return cli.GetRegion()
   112  }
   113  
   114  func main() {
   115  	parser, e := getSubcommandParser()
   116  	if e != nil {
   117  		showErrorAndExit(e)
   118  	}
   119  	e = parser.ParseArgs(os.Args[1:], false)
   120  	options := parser.Options().(*BaseOptions)
   121  
   122  	if parser.IsHelpSet() {
   123  		fmt.Print(parser.HelpString())
   124  		return
   125  	}
   126  	subcmd := parser.GetSubcommand()
   127  	subparser := subcmd.GetSubParser()
   128  	if e != nil || subparser == nil {
   129  		if subparser != nil {
   130  			fmt.Print(subparser.Usage())
   131  		} else {
   132  			fmt.Print(parser.Usage())
   133  		}
   134  		showErrorAndExit(e)
   135  		return
   136  	}
   137  	suboptions := subparser.Options()
   138  	if subparser.IsHelpSet() {
   139  		fmt.Print(subparser.HelpString())
   140  		return
   141  	}
   142  	var region *nutanix.SRegion
   143  	region, e = newClient(options)
   144  	if e != nil {
   145  		showErrorAndExit(e)
   146  	}
   147  	e = subcmd.Invoke(region, suboptions)
   148  	if e != nil {
   149  		showErrorAndExit(e)
   150  	}
   151  }