open-consul/command/snapshot_inspect.go

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package command
import (
"bytes"
"fmt"
"os"
"strings"
"text/tabwriter"
"github.com/hashicorp/consul/command/base"
"github.com/hashicorp/consul/snapshot"
)
// SnapshotInspectCommand is a Command implementation that is used to display
// metadata about a snapshot file
type SnapshotInspectCommand struct {
base.Command
}
func (c *SnapshotInspectCommand) Help() string {
helpText := `
Usage: consul snapshot inspect [options] FILE
Displays information about a snapshot file on disk.
To inspect the file "backup.snap":
$ consul snapshot inspect backup.snap
For a full list of options and examples, please see the Consul documentation.
`
return strings.TrimSpace(helpText)
}
func (c *SnapshotInspectCommand) Run(args []string) int {
flagSet := c.Command.NewFlagSet(c)
if err := c.Command.Parse(args); err != nil {
return 1
}
var file string
args = flagSet.Args()
switch len(args) {
case 0:
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c.UI.Error("Missing FILE argument")
return 1
case 1:
file = args[0]
default:
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c.UI.Error(fmt.Sprintf("Too many arguments (expected 1, got %d)", len(args)))
return 1
}
// Open the file.
f, err := os.Open(file)
if err != nil {
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c.UI.Error(fmt.Sprintf("Error opening snapshot file: %s", err))
return 1
}
defer f.Close()
meta, err := snapshot.Verify(f)
if err != nil {
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c.UI.Error(fmt.Sprintf("Error verifying snapshot: %s", err))
}
var b bytes.Buffer
tw := tabwriter.NewWriter(&b, 0, 2, 6, ' ', 0)
fmt.Fprintf(tw, "ID\t%s\n", meta.ID)
fmt.Fprintf(tw, "Size\t%d\n", meta.Size)
fmt.Fprintf(tw, "Index\t%d\n", meta.Index)
fmt.Fprintf(tw, "Term\t%d\n", meta.Term)
fmt.Fprintf(tw, "Version\t%d\n", meta.Version)
if err = tw.Flush(); err != nil {
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c.UI.Error(fmt.Sprintf("Error rendering snapshot info: %s", err))
}
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c.UI.Info(b.String())
return 0
}
func (c *SnapshotInspectCommand) Synopsis() string {
return "Displays information about a Consul snapshot file"
}