github.com/blixtra/nomad@v0.7.2-0.20171221000451-da9a1d7bb050/command/namespace_apply.go (about)

     1  package command
     2  
     3  import (
     4  	"fmt"
     5  	"strings"
     6  
     7  	"github.com/hashicorp/nomad/api"
     8  	flaghelper "github.com/hashicorp/nomad/helper/flag-helpers"
     9  	"github.com/posener/complete"
    10  )
    11  
    12  type NamespaceApplyCommand struct {
    13  	Meta
    14  }
    15  
    16  func (c *NamespaceApplyCommand) Help() string {
    17  	helpText := `
    18  Usage: nomad namespace apply [options] <namespace>
    19  
    20    Apply is used to create or update a namespace. It takes the namespace name to
    21    create or update as its only argument.
    22  
    23  General Options:
    24  
    25    ` + generalOptionsUsage() + `
    26  
    27  Apply Options:
    28  
    29    -quota
    30      The quota to attach to the namespace.
    31  
    32    -description
    33      An optional description for the namespace.
    34  `
    35  	return strings.TrimSpace(helpText)
    36  }
    37  
    38  func (c *NamespaceApplyCommand) AutocompleteFlags() complete.Flags {
    39  	return mergeAutocompleteFlags(c.Meta.AutocompleteFlags(FlagSetClient),
    40  		complete.Flags{
    41  			"-description": complete.PredictAnything,
    42  			"-quota":       QuotaPredictor(c.Meta.Client),
    43  		})
    44  }
    45  
    46  func (c *NamespaceApplyCommand) AutocompleteArgs() complete.Predictor {
    47  	return NamespacePredictor(c.Meta.Client, nil)
    48  }
    49  
    50  func (c *NamespaceApplyCommand) Synopsis() string {
    51  	return "Create or update a namespace"
    52  }
    53  
    54  func (c *NamespaceApplyCommand) Run(args []string) int {
    55  	var description, quota *string
    56  
    57  	flags := c.Meta.FlagSet("namespace apply", FlagSetClient)
    58  	flags.Usage = func() { c.Ui.Output(c.Help()) }
    59  	flags.Var((flaghelper.FuncVar)(func(s string) error {
    60  		description = &s
    61  		return nil
    62  	}), "description", "")
    63  	flags.Var((flaghelper.FuncVar)(func(s string) error {
    64  		quota = &s
    65  		return nil
    66  	}), "quota", "")
    67  
    68  	if err := flags.Parse(args); err != nil {
    69  		return 1
    70  	}
    71  
    72  	// Check that we get exactly one argument
    73  	args = flags.Args()
    74  	if l := len(args); l != 1 {
    75  		c.Ui.Error(c.Help())
    76  		return 1
    77  	}
    78  
    79  	name := args[0]
    80  
    81  	// Validate we have at-least a name
    82  	if name == "" {
    83  		c.Ui.Error("Namespace name required")
    84  		return 1
    85  	}
    86  
    87  	// Get the HTTP client
    88  	client, err := c.Meta.Client()
    89  	if err != nil {
    90  		c.Ui.Error(fmt.Sprintf("Error initializing client: %s", err))
    91  		return 1
    92  	}
    93  
    94  	// Lookup the given namespace
    95  	ns, _, err := client.Namespaces().Info(name, nil)
    96  	if err != nil && !strings.Contains(err.Error(), "404") {
    97  		c.Ui.Error(fmt.Sprintf("Error looking up namespace: %s", err))
    98  		return 1
    99  	}
   100  
   101  	if ns == nil {
   102  		ns = &api.Namespace{
   103  			Name: name,
   104  		}
   105  	}
   106  
   107  	// Add what is set
   108  	if description != nil {
   109  		ns.Description = *description
   110  	}
   111  	if quota != nil {
   112  		ns.Quota = *quota
   113  	}
   114  
   115  	_, err = client.Namespaces().Register(ns, nil)
   116  	if err != nil {
   117  		c.Ui.Error(fmt.Sprintf("Error applying namespace: %s", err))
   118  		return 1
   119  	}
   120  
   121  	c.Ui.Output(fmt.Sprintf("Successfully applied namespace %q!", name))
   122  	return 0
   123  }