mirror of
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170 lines
4.7 KiB
Go
170 lines
4.7 KiB
Go
// Copyright 2016 French Ben. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package doc
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import (
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"fmt"
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"io"
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"os"
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"path/filepath"
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"sort"
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"strings"
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"github.com/spf13/cobra"
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"github.com/spf13/pflag"
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"gopkg.in/yaml.v2"
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)
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type cmdOption struct {
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Name string
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Shorthand string `yaml:",omitempty"`
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DefaultValue string `yaml:"default_value,omitempty"`
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Usage string `yaml:",omitempty"`
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}
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type cmdDoc struct {
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Name string
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Synopsis string `yaml:",omitempty"`
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Description string `yaml:",omitempty"`
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Options []cmdOption `yaml:",omitempty"`
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InheritedOptions []cmdOption `yaml:"inherited_options,omitempty"`
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Example string `yaml:",omitempty"`
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SeeAlso []string `yaml:"see_also,omitempty"`
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}
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// GenYamlTree creates yaml structured ref files for this command and all descendants
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// in the directory given. This function may not work
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// correctly if your command names have `-` in them. If you have `cmd` with two
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// subcmds, `sub` and `sub-third`, and `sub` has a subcommand called `third`
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// it is undefined which help output will be in the file `cmd-sub-third.1`.
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func GenYamlTree(cmd *cobra.Command, dir string) error {
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identity := func(s string) string { return s }
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emptyStr := func(s string) string { return "" }
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return GenYamlTreeCustom(cmd, dir, emptyStr, identity)
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}
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// GenYamlTreeCustom creates yaml structured ref files.
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func GenYamlTreeCustom(cmd *cobra.Command, dir string, filePrepender, linkHandler func(string) string) error {
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for _, c := range cmd.Commands() {
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if !c.IsAvailableCommand() || c.IsAdditionalHelpTopicCommand() {
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continue
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}
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if err := GenYamlTreeCustom(c, dir, filePrepender, linkHandler); err != nil {
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return err
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}
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}
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basename := strings.Replace(cmd.CommandPath(), " ", "_", -1) + ".yaml"
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filename := filepath.Join(dir, basename)
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f, err := os.Create(filename)
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if err != nil {
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return err
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}
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defer f.Close()
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if _, err := io.WriteString(f, filePrepender(filename)); err != nil {
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return err
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}
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if err := GenYamlCustom(cmd, f, linkHandler); err != nil {
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return err
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}
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return nil
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}
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// GenYaml creates yaml output.
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func GenYaml(cmd *cobra.Command, w io.Writer) error {
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return GenYamlCustom(cmd, w, func(s string) string { return s })
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}
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// GenYamlCustom creates custom yaml output.
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func GenYamlCustom(cmd *cobra.Command, w io.Writer, linkHandler func(string) string) error {
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cmd.InitDefaultHelpCmd()
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cmd.InitDefaultHelpFlag()
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yamlDoc := cmdDoc{}
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yamlDoc.Name = cmd.CommandPath()
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yamlDoc.Synopsis = forceMultiLine(cmd.Short)
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yamlDoc.Description = forceMultiLine(cmd.Long)
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if len(cmd.Example) > 0 {
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yamlDoc.Example = cmd.Example
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}
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flags := cmd.NonInheritedFlags()
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if flags.HasFlags() {
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yamlDoc.Options = genFlagResult(flags)
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}
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flags = cmd.InheritedFlags()
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if flags.HasFlags() {
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yamlDoc.InheritedOptions = genFlagResult(flags)
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}
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if hasSeeAlso(cmd) {
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result := []string{}
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if cmd.HasParent() {
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parent := cmd.Parent()
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result = append(result, parent.CommandPath()+" - "+parent.Short)
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}
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children := cmd.Commands()
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sort.Sort(byName(children))
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for _, child := range children {
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if !child.IsAvailableCommand() || child.IsAdditionalHelpTopicCommand() {
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continue
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}
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result = append(result, child.Name()+" - "+child.Short)
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}
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yamlDoc.SeeAlso = result
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}
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final, err := yaml.Marshal(&yamlDoc)
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if err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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if _, err := w.Write(final); err != nil {
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return err
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}
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return nil
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}
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func genFlagResult(flags *pflag.FlagSet) []cmdOption {
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var result []cmdOption
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flags.VisitAll(func(flag *pflag.Flag) {
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// Todo, when we mark a shorthand is deprecated, but specify an empty message.
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// The flag.ShorthandDeprecated is empty as the shorthand is deprecated.
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// Using len(flag.ShorthandDeprecated) > 0 can't handle this, others are ok.
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if !(len(flag.ShorthandDeprecated) > 0) && len(flag.Shorthand) > 0 {
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opt := cmdOption{
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flag.Name,
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flag.Shorthand,
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flag.DefValue,
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forceMultiLine(flag.Usage),
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}
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result = append(result, opt)
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} else {
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opt := cmdOption{
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Name: flag.Name,
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DefaultValue: forceMultiLine(flag.DefValue),
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Usage: forceMultiLine(flag.Usage),
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}
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result = append(result, opt)
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}
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})
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return result
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}
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