author | Mikael Berthe <mikael@lilotux.net> |
Sat, 04 Feb 2023 12:58:35 +0100 | |
changeset 265 | 05c40b36d3b2 |
parent 185 | 564d92b54b00 |
permissions | -rw-r--r-- |
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// Copyright © 2017-2018 Mikael Berthe <mikael@lilotux.net> |
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// |
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// Licensed under the MIT license. |
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// Please see the LICENSE file is this directory. |
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package cmd |
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import ( |
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"fmt" |
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"io/ioutil" |
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"os" |
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"os/exec" |
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"path/filepath" |
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"strings" |
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"github.com/pkg/errors" |
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"github.com/spf13/cobra" |
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"github.com/spf13/viper" |
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"github.com/McKael/madonctl/printer" |
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) |
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func checkOutputFormat(cmd *cobra.Command, args []string) error { |
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of := outputFormat |
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if of == "" { |
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of = viper.GetString("default_output") |
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} |
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switch of { |
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case "", "plain", "json", "yaml", "template", "theme": |
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return nil // Accepted |
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} |
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return errors.Errorf("output format '%s' not supported", of) |
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} |
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// getOutputFormat return the requested output format, defaulting to "plain". |
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func getOutputFormat() string { |
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of := outputFormat |
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if of == "" { |
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of = viper.GetString("default_output") |
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if of == "" { |
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of = "plain" |
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} |
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} |
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// Override format if a template or a theme is provided |
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if outputTemplate != "" || outputTemplateFile != "" { |
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of = "template" |
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} else if outputTheme != "" { |
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of = "theme" |
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} |
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return of |
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} |
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type mcPrinter struct { |
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printer.ResourcePrinter |
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command string |
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} |
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type mcResourcePrinter interface { |
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printer.ResourcePrinter |
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printObj(interface{}) error |
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setCommand(string) |
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} |
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// getPrinter returns a resource printer for the requested output format. |
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func getPrinter() (mcResourcePrinter, error) { |
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opt := make(printer.Options) |
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of := getOutputFormat() |
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// Initialize color mode |
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switch viper.GetString("color") { |
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case "on", "true", "yes", "force": |
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opt["color_mode"] = "on" |
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case "off", "false", "no": |
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opt["color_mode"] = "off" |
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default: |
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opt["color_mode"] = "auto" |
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} |
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if of == "theme" { |
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if outputTheme != "" { |
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opt["name"] = outputTheme |
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} else { |
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opt["name"] = viper.GetString("default_theme") |
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} |
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opt["template_directory"] = viper.GetString("template_directory") |
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} else if of == "template" { |
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opt["template"] = outputTemplate |
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if outputTemplateFile != "" { |
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tmpl, err := readTemplate(outputTemplateFile, viper.GetString("template_directory")) |
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if err != nil { |
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return nil, err |
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} |
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opt["template"] = string(tmpl) |
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} |
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} |
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var mcrp mcPrinter |
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p, err := printer.NewPrinter(of, opt) |
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if err != nil { |
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return &mcrp, err |
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} |
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mcrp.ResourcePrinter = p |
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return &mcrp, nil |
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} |
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func readTemplate(name, templateDir string) ([]byte, error) { |
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if strings.HasPrefix(name, "/") || strings.HasPrefix(name, "./") || strings.HasPrefix(name, "../") { |
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return ioutil.ReadFile(name) |
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} |
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if templateDir != "" { |
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// If the template file can be found in the template directory, |
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// use this file. |
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fullName := filepath.Join(templateDir, name) |
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if fileExists(fullName) { |
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name = fullName |
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} |
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} |
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return ioutil.ReadFile(name) |
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} |
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func getThemes() ([]string, error) { |
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templDir := viper.GetString("template_directory") |
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if templDir == "" { |
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return nil, errors.New("template_directory not defined") |
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} |
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files, err := ioutil.ReadDir(filepath.Join(templDir, "themes")) |
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if err != nil { |
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return nil, errors.Wrap(err, "cannot read theme directory") |
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} |
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var tl []string |
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for _, f := range files { |
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if f.IsDir() { |
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tl = append(tl, f.Name()) |
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} |
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} |
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return tl, nil |
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} |
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func fileExists(filename string) bool { |
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if _, err := os.Stat(filename); err != nil { |
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return false |
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} |
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return true |
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} |
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func errPrint(format string, a ...interface{}) (n int, err error) { |
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return fmt.Fprintf(os.Stderr, format+"\n", a...) |
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} |
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func (mcp *mcPrinter) printObj(obj interface{}) error { |
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if mcp.command == "" { |
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return mcp.PrintObj(obj, nil, "") |
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} |
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cmd := exec.Command(mcp.command) |
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stdin, err := cmd.StdinPipe() |
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if err != nil { |
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return err |
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} |
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err = mcp.PrintObj(obj, stdin, "") |
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stdin.Close() |
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if err != nil { |
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return err |
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} |
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out, err := cmd.CombinedOutput() |
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if len(out) > 0 { |
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errPrint("Command output: %s", string(out)) |
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} |
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if err != nil { |
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return errors.Wrap(err, "external command failed") |
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} |
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return nil |
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} |
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func (mcp *mcPrinter) setCommand(cmd string) { |
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mcp.command = cmd |
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} |