github.com/niedbalski/juju@v0.0.0-20190215020005-8ff100488e47/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  	"os"
     8  
     9  	"github.com/juju/cmd"
    10  	"github.com/juju/loggo"
    11  	"github.com/juju/utils/featureflag"
    12  
    13  	"github.com/juju/juju/feature"
    14  	"github.com/juju/juju/juju"
    15  	"github.com/juju/juju/juju/osenv"
    16  	_ "github.com/juju/juju/provider/all"
    17  )
    18  
    19  var logger = loggo.GetLogger("juju.plugins.metadata")
    20  
    21  var metadataDoc = `
    22  Juju metadata is used to find the correct image and agent binaries when bootstrapping a
    23  Juju model.
    24  `
    25  
    26  // Main registers subcommands for the juju-metadata executable, and hands over control
    27  // to the cmd package. This function is not redundant with main, because it
    28  // provides an entry point for testing with arbitrary command line arguments.
    29  func Main(args []string) {
    30  	ctx, err := cmd.DefaultContext()
    31  	if err != nil {
    32  		cmd.WriteError(os.Stderr, err)
    33  		os.Exit(2)
    34  	}
    35  	if err := juju.InitJujuXDGDataHome(); err != nil {
    36  		cmd.WriteError(ctx.Stderr, err)
    37  		os.Exit(2)
    38  	}
    39  	os.Exit(cmd.Main(NewSuperCommand(), ctx, args[1:]))
    40  }
    41  
    42  // NewSuperCommand creates the metadata plugin supercommand and registers the
    43  // subcommands that it supports.
    44  func NewSuperCommand() cmd.Command {
    45  	metadatacmd := cmd.NewSuperCommand(cmd.SuperCommandParams{
    46  		Name:        "metadata",
    47  		UsagePrefix: "juju",
    48  		Doc:         metadataDoc,
    49  		Purpose:     "tools for generating and validating image and tools metadata",
    50  		Log:         &cmd.Log{}})
    51  
    52  	metadatacmd.Register(newValidateImageMetadataCommand())
    53  	metadatacmd.Register(newImageMetadataCommand())
    54  	metadatacmd.Register(newToolsMetadataCommand())
    55  	metadatacmd.Register(newValidateToolsMetadataCommand())
    56  	metadatacmd.Register(newSignMetadataCommand())
    57  	if featureflag.Enabled(feature.ImageMetadata) {
    58  		metadatacmd.Register(newListImagesCommand())
    59  		metadatacmd.Register(newAddImageMetadataCommand())
    60  		metadatacmd.Register(newDeleteImageMetadataCommand())
    61  	}
    62  	return metadatacmd
    63  }
    64  
    65  func init() {
    66  	featureflag.SetFlagsFromEnvironment(osenv.JujuFeatureFlagEnvKey)
    67  }
    68  
    69  func main() {
    70  	Main(os.Args)
    71  }