mirror of https://github.com/hashicorp/consul
70 lines
1.6 KiB
Go
70 lines
1.6 KiB
Go
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package version
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import (
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"bytes"
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"encoding/json"
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"fmt"
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)
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const (
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PrettyFormat string = "pretty"
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JSONFormat string = "json"
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)
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type Formatter interface {
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Format(info *VersionInfo) (string, error)
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}
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func GetSupportedFormats() []string {
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return []string{PrettyFormat, JSONFormat}
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}
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func NewFormatter(format string) (Formatter, error) {
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switch format {
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case PrettyFormat:
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return newPrettyFormatter(), nil
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case JSONFormat:
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return newJSONFormatter(), nil
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default:
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return nil, fmt.Errorf("Unknown format: %s", format)
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}
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}
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type prettyFormatter struct{}
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func newPrettyFormatter() Formatter {
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return &prettyFormatter{}
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}
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func (_ *prettyFormatter) Format(info *VersionInfo) (string, error) {
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var buffer bytes.Buffer
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buffer.WriteString(fmt.Sprintf("Consul %s\n", info.HumanVersion))
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if info.Revision != "" {
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buffer.WriteString(fmt.Sprintf("Revision %s\n", info.Revision))
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}
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var supplement string
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if info.RPC.Default < info.RPC.Max {
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supplement = fmt.Sprintf(" (agent will automatically use protocol >%d when speaking to compatible agents)",
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info.RPC.Default)
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}
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buffer.WriteString(fmt.Sprintf("Protocol %d spoken by default, understands %d to %d%s\n",
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info.RPC.Default, info.RPC.Min, info.RPC.Max, supplement))
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return buffer.String(), nil
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}
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type jsonFormatter struct{}
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func newJSONFormatter() Formatter {
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return &jsonFormatter{}
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}
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func (_ *jsonFormatter) Format(info *VersionInfo) (string, error) {
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b, err := json.MarshalIndent(info, "", " ")
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if err != nil {
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return "", fmt.Errorf("Failed to marshal version info: %v", err)
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}
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return string(b), nil
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}
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