DockerCLI/docs/yaml/yaml.go

213 lines
5.6 KiB
Go
Raw Normal View History

package main
import (
"fmt"
"io"
"os"
"path/filepath"
"sort"
"strings"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
"gopkg.in/yaml.v2"
)
type cmdOption struct {
Option string
Shorthand string `yaml:",omitempty"`
DefaultValue string `yaml:"default_value,omitempty"`
Description string `yaml:",omitempty"`
}
type cmdDoc struct {
Name string `yaml:"command"`
SeeAlso []string `yaml:"parent,omitempty"`
Version string `yaml:"engine_version,omitempty"`
Aliases string `yaml:",omitempty"`
Short string `yaml:",omitempty"`
Long string `yaml:",omitempty"`
Usage string `yaml:",omitempty"`
Pname string `yaml:",omitempty"`
Plink string `yaml:",omitempty"`
Cname []string `yaml:",omitempty"`
Clink []string `yaml:",omitempty"`
Options []cmdOption `yaml:",omitempty"`
InheritedOptions []cmdOption `yaml:"inherited_options,omitempty"`
Example string `yaml:"examples,omitempty"`
}
// GenYamlTree creates yaml structured ref files
func GenYamlTree(cmd *cobra.Command, dir string) error {
identity := func(s string) string { return s }
emptyStr := func(s string) string { return "" }
return GenYamlTreeCustom(cmd, dir, emptyStr, identity)
}
// GenYamlTreeCustom creates yaml structured ref files
func GenYamlTreeCustom(cmd *cobra.Command, dir string, filePrepender, linkHandler func(string) string) error {
for _, c := range cmd.Commands() {
if !c.IsAvailableCommand() || c.IsHelpCommand() {
continue
}
if err := GenYamlTreeCustom(c, dir, filePrepender, linkHandler); err != nil {
return err
}
}
basename := strings.Replace(cmd.CommandPath(), " ", "_", -1) + ".yaml"
filename := filepath.Join(dir, basename)
f, err := os.Create(filename)
if err != nil {
return err
}
defer f.Close()
if _, err := io.WriteString(f, filePrepender(filename)); err != nil {
return err
}
if err := GenYamlCustom(cmd, f, linkHandler); err != nil {
return err
}
return nil
}
// GenYamlCustom creates custom yaml output
func GenYamlCustom(cmd *cobra.Command, w io.Writer, linkHandler func(string) string) error {
cliDoc := cmdDoc{}
cliDoc.Name = cmd.CommandPath()
// Check experimental: ok := cmd.Tags["experimental"]
cliDoc.Aliases = strings.Join(cmd.Aliases, ", ")
cliDoc.Short = cmd.Short
cliDoc.Long = cmd.Long
if len(cliDoc.Long) == 0 {
cliDoc.Long = cliDoc.Short
}
if cmd.Runnable() {
cliDoc.Usage = cmd.UseLine()
}
if len(cmd.Example) > 0 {
cliDoc.Example = cmd.Example
}
flags := cmd.NonInheritedFlags()
if flags.HasFlags() {
cliDoc.Options = genFlagResult(flags)
}
flags = cmd.InheritedFlags()
if flags.HasFlags() {
cliDoc.InheritedOptions = genFlagResult(flags)
}
if hasSeeAlso(cmd) {
if cmd.HasParent() {
parent := cmd.Parent()
cliDoc.Pname = parent.CommandPath()
link := cliDoc.Pname + ".yaml"
cliDoc.Plink = strings.Replace(link, " ", "_", -1)
cmd.VisitParents(func(c *cobra.Command) {
if c.DisableAutoGenTag {
cmd.DisableAutoGenTag = c.DisableAutoGenTag
}
})
}
children := cmd.Commands()
sort.Sort(byName(children))
for _, child := range children {
if !child.IsAvailableCommand() || child.IsHelpCommand() {
continue
}
currentChild := cliDoc.Name + " " + child.Name()
cliDoc.Cname = append(cliDoc.Cname, cliDoc.Name+" "+child.Name())
link := currentChild + ".yaml"
cliDoc.Clink = append(cliDoc.Clink, strings.Replace(link, " ", "_", -1))
}
}
final, err := yaml.Marshal(&cliDoc)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
if _, err := fmt.Fprintln(w, string(final)); err != nil {
return err
}
return nil
}
func genFlagResult(flags *pflag.FlagSet) []cmdOption {
var result []cmdOption
flags.VisitAll(func(flag *pflag.Flag) {
// Todo, when we mark a shorthand is deprecated, but specify an empty message.
// The flag.ShorthandDeprecated is empty as the shorthand is deprecated.
// Using len(flag.ShorthandDeprecated) > 0 can't handle this, others are ok.
if !(len(flag.ShorthandDeprecated) > 0) && len(flag.Shorthand) > 0 {
opt := cmdOption{
Option: flag.Name,
Shorthand: flag.Shorthand,
DefaultValue: flag.DefValue,
Description: forceMultiLine(flag.Usage),
}
result = append(result, opt)
} else {
opt := cmdOption{
Option: flag.Name,
DefaultValue: forceMultiLine(flag.DefValue),
Description: forceMultiLine(flag.Usage),
}
result = append(result, opt)
}
})
return result
}
// Temporary workaround for yaml lib generating incorrect yaml with long strings
// that do not contain \n.
func forceMultiLine(s string) string {
if len(s) > 60 && !strings.Contains(s, "\n") {
s = s + "\n"
}
return s
}
// Small duplication for cobra utils
func hasSeeAlso(cmd *cobra.Command) bool {
if cmd.HasParent() {
return true
}
for _, c := range cmd.Commands() {
if !c.IsAvailableCommand() || c.IsHelpCommand() {
continue
}
return true
}
return false
}
func parseMDContent(mdString string) (description string, examples string) {
parsedContent := strings.Split(mdString, "\n## ")
for _, s := range parsedContent {
if strings.Index(s, "Description") == 0 {
description = strings.Trim(s, "Description\n")
}
if strings.Index(s, "Examples") == 0 {
examples = strings.Trim(s, "Examples\n")
}
}
return
}
type byName []*cobra.Command
func (s byName) Len() int { return len(s) }
func (s byName) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
func (s byName) Less(i, j int) bool { return s[i].Name() < s[j].Name() }