github.com/makyo/juju@v0.0.0-20160425123129-2608902037e9/cmd/plugins/juju-metadata/metadata.go (about)

     1  // Copyright 2012, 2013 Canonical Ltd.
     2  // Licensed under the AGPLv3, see LICENCE file for details.
     3  
     4  package main
     5  
     6  import (
     7  	"fmt"
     8  	"os"
     9  
    10  	"github.com/juju/cmd"
    11  	"github.com/juju/loggo"
    12  	"github.com/juju/utils/featureflag"
    13  
    14  	"github.com/juju/juju/feature"
    15  	"github.com/juju/juju/juju"
    16  	"github.com/juju/juju/juju/osenv"
    17  	_ "github.com/juju/juju/provider/all"
    18  )
    19  
    20  var logger = loggo.GetLogger("juju.plugins.metadata")
    21  
    22  var metadataDoc = `
    23  Juju metadata is used to find the correct image and tools when bootstrapping a
    24  Juju model.
    25  `
    26  
    27  // Main registers subcommands for the juju-metadata executable, and hands over control
    28  // to the cmd package. This function is not redundant with main, because it
    29  // provides an entry point for testing with arbitrary command line arguments.
    30  func Main(args []string) {
    31  	ctx, err := cmd.DefaultContext()
    32  	if err != nil {
    33  		fmt.Fprintf(os.Stderr, "error: %v\n", err)
    34  		os.Exit(2)
    35  	}
    36  	if err := juju.InitJujuXDGDataHome(); err != nil {
    37  		fmt.Fprintf(os.Stderr, "error: %s\n", err)
    38  		os.Exit(2)
    39  	}
    40  	os.Exit(cmd.Main(NewSuperCommand(), ctx, args[1:]))
    41  }
    42  
    43  // NewSuperCommand creates the metadata plugin supercommand and registers the
    44  // subcommands that it supports.
    45  func NewSuperCommand() cmd.Command {
    46  	metadatacmd := cmd.NewSuperCommand(cmd.SuperCommandParams{
    47  		Name:        "metadata",
    48  		UsagePrefix: "juju",
    49  		Doc:         metadataDoc,
    50  		Purpose:     "tools for generating and validating image and tools metadata",
    51  		Log:         &cmd.Log{}})
    52  
    53  	metadatacmd.Register(newValidateImageMetadataCommand())
    54  	metadatacmd.Register(newImageMetadataCommand())
    55  	metadatacmd.Register(newToolsMetadataCommand())
    56  	metadatacmd.Register(newValidateToolsMetadataCommand())
    57  	metadatacmd.Register(newSignMetadataCommand())
    58  	if featureflag.Enabled(feature.ImageMetadata) {
    59  		metadatacmd.Register(newListImagesCommand())
    60  		metadatacmd.Register(newAddImageMetadataCommand())
    61  		metadatacmd.Register(newDeleteImageMetadataCommand())
    62  	}
    63  	return metadatacmd
    64  }
    65  
    66  func init() {
    67  	featureflag.SetFlagsFromEnvironment(osenv.JujuFeatureFlagEnvKey)
    68  }
    69  
    70  func main() {
    71  	Main(os.Args)
    72  }