| // Copyright Istio Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package formatting |
| |
| import ( |
| "encoding/json" |
| "fmt" |
| "io" |
| "os" |
| "strings" |
| ) |
| |
| import ( |
| "github.com/mattn/go-isatty" |
| "istio.io/pkg/env" |
| "sigs.k8s.io/yaml" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go-pixiu/pkg/config/analysis/diag" |
| ) |
| |
| // Formatting options for Messages |
| const ( |
| LogFormat = "log" |
| JSONFormat = "json" |
| YAMLFormat = "yaml" |
| ) |
| |
| var ( |
| MsgOutputFormatKeys = []string{LogFormat, JSONFormat, YAMLFormat} |
| MsgOutputFormats = make(map[string]bool) |
| termEnvVar = env.RegisterStringVar("TERM", "", "Specifies terminal type. Use 'dumb' to suppress color output") |
| ) |
| |
| func init() { |
| for _, key := range MsgOutputFormatKeys { |
| MsgOutputFormats[key] = true |
| } |
| } |
| |
| // Print output messages in the specified format with color options |
| func Print(ms diag.Messages, format string, colorize bool) (string, error) { |
| switch format { |
| case LogFormat: |
| return printLog(ms, colorize), nil |
| case JSONFormat: |
| return printJSON(ms) |
| case YAMLFormat: |
| return printYAML(ms) |
| default: |
| return "", fmt.Errorf("invalid format, expected one of %v but got %q", MsgOutputFormatKeys, format) |
| } |
| } |
| |
| func printLog(ms diag.Messages, colorize bool) string { |
| var logOutput []string |
| for _, m := range ms { |
| logOutput = append(logOutput, render(m, colorize)) |
| } |
| return strings.Join(logOutput, "\n") |
| } |
| |
| func printJSON(ms diag.Messages) (string, error) { |
| jsonOutput, err := json.MarshalIndent(ms, "", "\t") |
| return string(jsonOutput), err |
| } |
| |
| func printYAML(ms diag.Messages) (string, error) { |
| yamlOutput, err := yaml.Marshal(ms) |
| return string(yamlOutput), err |
| } |
| |
| // Formatting options for Message |
| var ( |
| colorPrefixes = map[diag.Level]string{ |
| diag.Info: "", // no special color for info messages |
| diag.Warning: "\033[33m", // yellow |
| diag.Error: "\033[1;31m", // bold red |
| } |
| ) |
| |
| // render turns a Message instance into a string with an option of colored bash output |
| func render(m diag.Message, colorize bool) string { |
| return fmt.Sprintf("%s%v%s [%v]%s %s", |
| colorPrefix(m, colorize), m.Type.Level(), colorSuffix(colorize), |
| m.Type.Code(), m.Origin(), fmt.Sprintf(m.Type.Template(), m.Parameters...), |
| ) |
| } |
| |
| func colorPrefix(m diag.Message, colorize bool) string { |
| if !colorize { |
| return "" |
| } |
| |
| prefix, ok := colorPrefixes[m.Type.Level()] |
| if !ok { |
| return "" |
| } |
| return prefix |
| } |
| |
| func colorSuffix(colorize bool) string { |
| if !colorize { |
| return "" |
| } |
| return "\033[0m" |
| } |
| |
| func IstioctlColorDefault(writer io.Writer) bool { |
| if strings.EqualFold(termEnvVar.Get(), "dumb") { |
| return false |
| } |
| |
| file, ok := writer.(*os.File) |
| if ok { |
| if !isatty.IsTerminal(file.Fd()) { |
| return false |
| } |
| } |
| |
| return true |
| } |