github.com/Ilhicas/nomad@v1.0.4-0.20210304152020-e86851182bc3/command/license_put.go (about)

     1  package command
     2  
     3  import (
     4  	"bytes"
     5  	"fmt"
     6  	"io"
     7  	"io/ioutil"
     8  	"os"
     9  	"strings"
    10  
    11  	"github.com/pkg/errors"
    12  )
    13  
    14  type LicensePutCommand struct {
    15  	Meta
    16  
    17  	testStdin io.Reader
    18  }
    19  
    20  func (c *LicensePutCommand) Help() string {
    21  	helpText := `
    22  Usage: nomad license put [options]
    23  
    24    Puts a new license in Servers and Clients
    25  
    26    When ACLs are enabled, this command requires a token with the
    27    'operator:write' capability.
    28  
    29  General Options:
    30  
    31    ` + generalOptionsUsage(usageOptsDefault|usageOptsNoNamespace) + `
    32  
    33  Install a new license from a file:
    34  
    35  	$ nomad license put <path>
    36  
    37  Install a new license from stdin:
    38  
    39  	$ nomad license put -
    40  
    41  	`
    42  	return strings.TrimSpace(helpText)
    43  }
    44  
    45  func (c *LicensePutCommand) Synopsis() string {
    46  	return "Install a new Nomad Enterprise License"
    47  }
    48  
    49  func (c *LicensePutCommand) Name() string { return "license put" }
    50  
    51  func (c *LicensePutCommand) Run(args []string) int {
    52  	flags := c.Meta.FlagSet(c.Name(), FlagSetClient)
    53  	flags.Usage = func() { c.Ui.Output(c.Help()) }
    54  
    55  	if err := flags.Parse(args); err != nil {
    56  		c.Ui.Error(fmt.Sprintf("Error parsing flags: %s", err))
    57  		return 1
    58  	}
    59  
    60  	args = flags.Args()
    61  	data, err := c.dataFromArgs(args)
    62  	if err != nil {
    63  		c.Ui.Error(errors.Wrap(err, "Error parsing arguments").Error())
    64  		return 1
    65  	}
    66  
    67  	client, err := c.Meta.Client()
    68  	if err != nil {
    69  		c.Ui.Error(fmt.Sprintf("Error initializing client: %s", err))
    70  		return 1
    71  	}
    72  
    73  	_, err = client.Operator().LicensePut(data, nil)
    74  	if err != nil {
    75  		c.Ui.Error(fmt.Sprintf("Error putting license: %v", err))
    76  		return 1
    77  	}
    78  
    79  	c.Ui.Output("Successfully applied license")
    80  	return 0
    81  }
    82  
    83  func (c *LicensePutCommand) dataFromArgs(args []string) (string, error) {
    84  	switch len(args) {
    85  	case 0:
    86  		return "", fmt.Errorf("Missing LICENSE argument")
    87  	case 1:
    88  		return LoadDataSource(args[0], c.testStdin)
    89  	default:
    90  		return "", fmt.Errorf("Too many arguments, exptected 1, got %d", len(args))
    91  	}
    92  }
    93  
    94  func loadFromFile(path string) (string, error) {
    95  	data, err := ioutil.ReadFile(path)
    96  	if err != nil {
    97  		return "", fmt.Errorf("Failed to read file: %v", err)
    98  	}
    99  	return string(data), nil
   100  }
   101  
   102  func loadFromStdin(testStdin io.Reader) (string, error) {
   103  	var stdin io.Reader = os.Stdin
   104  	if testStdin != nil {
   105  		stdin = testStdin
   106  	}
   107  
   108  	var b bytes.Buffer
   109  	if _, err := io.Copy(&b, stdin); err != nil {
   110  		return "", fmt.Errorf("Failed to read stdin: %v", err)
   111  	}
   112  	return b.String(), nil
   113  }
   114  
   115  func LoadDataSource(file string, testStdin io.Reader) (string, error) {
   116  	// Handle empty quoted shell parameters
   117  	if len(file) == 0 {
   118  		return "", nil
   119  	}
   120  
   121  	if file == "-" {
   122  		if len(file) > 1 {
   123  			return file, nil
   124  		}
   125  		return loadFromStdin(testStdin)
   126  	}
   127  
   128  	return loadFromFile(file)
   129  }