github.com/adityamillind98/nomad@v0.11.8/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  General Options:
    27  
    28    ` + generalOptionsUsage() + `
    29  
    30  Install a new license from a file:
    31  
    32  	$ nomad license put <path>
    33  
    34  Install a new license from stdin:
    35  
    36  	$ nomad license put -
    37  
    38  	`
    39  	return strings.TrimSpace(helpText)
    40  }
    41  
    42  func (c *LicensePutCommand) Synopsis() string {
    43  	return "Install a new Nomad Enterprise License"
    44  }
    45  
    46  func (c *LicensePutCommand) Name() string { return "license put" }
    47  
    48  func (c *LicensePutCommand) Run(args []string) int {
    49  	flags := c.Meta.FlagSet(c.Name(), FlagSetClient)
    50  	flags.Usage = func() { c.Ui.Output(c.Help()) }
    51  
    52  	if err := flags.Parse(args); err != nil {
    53  		c.Ui.Error(fmt.Sprintf("Error parsing flags: %s", err))
    54  		return 1
    55  	}
    56  
    57  	args = flags.Args()
    58  	data, err := c.dataFromArgs(args)
    59  	if err != nil {
    60  		c.Ui.Error(errors.Wrap(err, "Error parsing arguments").Error())
    61  		return 1
    62  	}
    63  
    64  	client, err := c.Meta.Client()
    65  	if err != nil {
    66  		c.Ui.Error(fmt.Sprintf("Error initializing client: %s", err))
    67  		return 1
    68  	}
    69  
    70  	_, err = client.Operator().LicensePut(data, nil)
    71  	if err != nil {
    72  		c.Ui.Error(fmt.Sprintf("Error putting license: %v", err))
    73  		return 1
    74  	}
    75  
    76  	c.Ui.Output("Successfully applied license")
    77  	return 0
    78  }
    79  
    80  func (c *LicensePutCommand) dataFromArgs(args []string) (string, error) {
    81  	switch len(args) {
    82  	case 0:
    83  		return "", fmt.Errorf("Missing LICENSE argument")
    84  	case 1:
    85  		return LoadDataSource(args[0], c.testStdin)
    86  	default:
    87  		return "", fmt.Errorf("Too many arguments, exptected 1, got %d", len(args))
    88  	}
    89  }
    90  
    91  func loadFromFile(path string) (string, error) {
    92  	data, err := ioutil.ReadFile(path)
    93  	if err != nil {
    94  		return "", fmt.Errorf("Failed to read file: %v", err)
    95  	}
    96  	return string(data), nil
    97  }
    98  
    99  func loadFromStdin(testStdin io.Reader) (string, error) {
   100  	var stdin io.Reader = os.Stdin
   101  	if testStdin != nil {
   102  		stdin = testStdin
   103  	}
   104  
   105  	var b bytes.Buffer
   106  	if _, err := io.Copy(&b, stdin); err != nil {
   107  		return "", fmt.Errorf("Failed to read stdin: %v", err)
   108  	}
   109  	return b.String(), nil
   110  }
   111  
   112  func LoadDataSource(file string, testStdin io.Reader) (string, error) {
   113  	// Handle empty quoted shell parameters
   114  	if len(file) == 0 {
   115  		return "", nil
   116  	}
   117  
   118  	if file == "-" {
   119  		if len(file) > 1 {
   120  			return file, nil
   121  		}
   122  		return loadFromStdin(testStdin)
   123  	}
   124  
   125  	return loadFromFile(file)
   126  }