forked from mirror/cobra
Auto generation of markdown docs!
An example from the kubernetes project, for the `kubectl config`
command, which as subcommands, and flags, and all sorts of stuff, it
will generate markdown like so:
config modifies .kubeconfig files
config modifies .kubeconfig files using subcommands like "kubectl config set current-context my-context"
```
kubectl config SUBCOMMAND
```
```
--envvar=false: use the .kubeconfig from $KUBECONFIG
--global=false: use the .kubeconfig from /home/username
-h, --help=false: help for config
--kubeconfig="": use a particular .kubeconfig file
--local=false: use the .kubeconfig in the current directory
```
```
--alsologtostderr=false: log to standard error as well as files
--api-version="": The API version to use when talking to the server
-a, --auth-path="": Path to the auth info file. If missing, prompt the user. Only used if using https.
--certificate-authority="": Path to a cert. file for the certificate authority.
--client-certificate="": Path to a client key file for TLS.
--client-key="": Path to a client key file for TLS.
--cluster="": The name of the kubeconfig cluster to use
--context="": The name of the kubeconfig context to use
--insecure-skip-tls-verify=false: If true, the server's certificate will not be checked for validity. This will make your HTTPS connections insecure.
--log_backtrace_at=:0: when logging hits line file:N, emit a stack trace
--log_dir=: If non-empty, write log files in this directory
--log_flush_frequency=5s: Maximum number of seconds between log flushes
--logtostderr=true: log to standard error instead of files
--match-server-version=false: Require server version to match client version
--namespace="": If present, the namespace scope for this CLI request.
--password="": Password for basic authentication to the API server.
-s, --server="": The address and port of the Kubernetes API server
--stderrthreshold=2: logs at or above this threshold go to stderr
--token="": Bearer token for authentication to the API server.
--user="": The name of the kubeconfig user to use
--username="": Username for basic authentication to the API server.
--v=0: log level for V logs
--validate=false: If true, use a schema to validate the input before sending it
--vmodule=: comma-separated list of pattern=N settings for file-filtered logging
```
* [kubectl](kubectl.md) - kubectl controls the Kubernetes cluster manager
* [kubectl config set](kubectl_config_set.md) - Sets an individual value in a .kubeconfig file
* [kubectl config set-cluster](kubectl_config_set-cluster.md) - Sets a cluster entry in .kubeconfig
* [kubectl config set-context](kubectl_config_set-context.md) - Sets a context entry in .kubeconfig
* [kubectl config set-credentials](kubectl_config_set-credentials.md) - Sets a user entry in .kubeconfig
* [kubectl config unset](kubectl_config_unset.md) - Unsets an individual value in a .kubeconfig file
* [kubectl config use-context](kubectl_config_use-context.md) - Sets the current-context in a .kubeconfig file
* [kubectl config view](kubectl_config_view.md) - displays merged .kubeconfig settings or a specified .kubeconfig file.
This commit is contained in:
Eric Paris
parent
c746d30ef0
commit
8a18f25809
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@ -348,6 +348,10 @@ Like help the function and template are over ridable through public methods.
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command.SetUsageTemplate(s string)
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## Generating markdown formatted documentation for your command
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Cobra can generate a markdown formatted document based on the subcommands, flags, etc. A simple example of how to do this for your command can be found in [Markdown Docs](md_docs.md)
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## Generating bash completions for your command
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Cobra can generate a bash completions file. If you add more information to your command these completions can be amazingly powerful and flexible. Read more about [Bash Completions](bash_completions.md)
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@ -37,11 +37,20 @@ var cmdEcho = &Command{
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Aliases: []string{"say"},
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Short: "Echo anything to the screen",
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Long: `an utterly useless command for testing.`,
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Example: "Just run cobra-test echo",
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Run: func(cmd *Command, args []string) {
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te = args
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},
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}
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var cmdEchoSub = &Command{
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Use: "echosub [string to print]",
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Short: "second sub command for echo",
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Long: `an absolutely utterly useless command for testing gendocs!.`,
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Run: func(cmd *Command, args []string) {
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},
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}
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var cmdTimes = &Command{
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Use: "times [# times] [string to echo]",
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Short: "Echo anything to the screen more times",
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@ -0,0 +1,121 @@
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//Copyright 2015 Red Hat Inc. 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 cobra
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import (
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"bytes"
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"fmt"
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"os"
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"sort"
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"strings"
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"time"
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)
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func printOptions(out *bytes.Buffer, cmd *Command, name string) {
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flags := cmd.NonInheritedFlags()
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flags.SetOutput(out)
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if flags.HasFlags() {
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fmt.Fprintf(out, "### Options\n\n```\n")
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flags.PrintDefaults()
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fmt.Fprintf(out, "```\n\n")
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}
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parentFlags := cmd.InheritedFlags()
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parentFlags.SetOutput(out)
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if parentFlags.HasFlags() {
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fmt.Fprintf(out, "### Options inherrited from parent commands\n\n```\n")
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parentFlags.PrintDefaults()
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fmt.Fprintf(out, "```\n\n")
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}
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}
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type byName []*Command
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func (s byName) Len() int { return len(s) }
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func (s byName) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
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func (s byName) Less(i, j int) bool { return s[i].Name() < s[j].Name() }
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func GenMarkdown(cmd *Command, out *bytes.Buffer) {
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name := cmd.CommandPath()
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short := cmd.Short
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long := cmd.Long
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if len(long) == 0 {
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long = short
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}
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fmt.Fprintf(out, "## %s\n\n", name)
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fmt.Fprintf(out, "%s\n\n", short)
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fmt.Fprintf(out, "### Synopsis\n\n")
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fmt.Fprintf(out, "\n%s\n\n", long)
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if cmd.Runnable() {
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fmt.Fprintf(out, "```\n%s\n```\n\n", cmd.UseLine())
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}
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if len(cmd.Example) > 0 {
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fmt.Fprintf(out, "### Examples\n\n")
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fmt.Fprintf(out, "```\n%s\n```\n\n", cmd.Example)
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}
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printOptions(out, cmd, name)
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if len(cmd.Commands()) > 0 || cmd.HasParent() {
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fmt.Fprintf(out, "### SEE ALSO\n")
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if cmd.HasParent() {
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parent := cmd.Parent()
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pname := parent.CommandPath()
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link := pname + ".md"
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link = strings.Replace(link, " ", "_", -1)
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fmt.Fprintf(out, "* [%s](%s)\t - %s\n", pname, link, 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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cname := name + " " + child.Name()
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link := cname + ".md"
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link = strings.Replace(link, " ", "_", -1)
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fmt.Fprintf(out, "* [%s](%s)\t - %s\n", cname, link, child.Short)
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}
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fmt.Fprintf(out, "\n")
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}
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fmt.Fprintf(out, "###### Auto generated by spf13/cobra at %s\n", time.Now().UTC())
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}
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func GenMarkdownTree(cmd *Command, dir string) {
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for _, c := range cmd.Commands() {
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GenMarkdownTree(c, dir)
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}
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out := new(bytes.Buffer)
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GenMarkdown(cmd, out)
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filename := cmd.CommandPath()
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filename = dir + strings.Replace(filename, " ", "_", -1) + ".md"
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outFile, err := os.Create(filename)
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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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defer outFile.Close()
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_, err = outFile.Write(out.Bytes())
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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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}
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@ -0,0 +1,35 @@
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# Generating Markdown Docs For Your Own cobra.Command
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## Generate markdown docs for the entire command tree
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This program can actually generate docs for the kubectl command in the kubernetes project
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```go
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package main
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import (
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"io/ioutil"
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"os"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/kubectl/cmd"
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"github.com/spf13/cobra"
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)
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func main() {
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kubectl := cmd.NewFactory(nil).NewKubectlCommand(os.Stdin, ioutil.Discard, ioutil.Discard)
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cobra.GenMarkdownTree(kubectl, "./")
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}
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```
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This will generate a whole series of files, one for each command in the tree, in the directory specified (in this case "./")
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## Generate markdown docs for a single command
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You may wish to have more control over the output, or only generate for a single command, instead of the entire command tree. If this is the case you may prefer to `GenMarkdown()` instead of `GenMarkdownTree`
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```go
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out := new(bytes.Buffer)
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cobra.GenMarkdown(cmd, out)
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```
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This will write the markdown doc for ONLY "cmd" into the out, buffer.
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@ -0,0 +1,64 @@
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package cobra
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import (
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"bytes"
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"fmt"
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"os"
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"strings"
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"testing"
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)
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var _ = fmt.Println
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var _ = os.Stderr
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func TestGenMdDoc(t *testing.T) {
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c := initializeWithRootCmd()
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// Need two commands to run the command alphabetical sort
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cmdEcho.AddCommand(cmdTimes, cmdEchoSub)
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c.AddCommand(cmdPrint, cmdEcho)
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cmdRootWithRun.PersistentFlags().StringVarP(&flags2a, "rootflag", "r", "two", strtwoParentHelp)
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out := new(bytes.Buffer)
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// We generate on s subcommand so we have both subcommands and parents
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GenMarkdown(cmdEcho, out)
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found := out.String()
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// Our description
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expected := cmdEcho.Long
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if !strings.Contains(found, expected) {
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t.Errorf("Unexpected response.\nExpecting to contain: \n %q\nGot:\n %q\n", expected, found)
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}
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// Better have our example
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expected = cmdEcho.Example
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if !strings.Contains(found, expected) {
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t.Errorf("Unexpected response.\nExpecting to contain: \n %q\nGot:\n %q\n", expected, found)
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}
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// A local flag
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expected = "boolone"
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if !strings.Contains(found, expected) {
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t.Errorf("Unexpected response.\nExpecting to contain: \n %q\nGot:\n %q\n", expected, found)
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}
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// persistent flag on parent
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expected = "rootflag"
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if !strings.Contains(found, expected) {
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t.Errorf("Unexpected response.\nExpecting to contain: \n %q\nGot:\n %q\n", expected, found)
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}
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// We better output info about our parent
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expected = cmdRootWithRun.Short
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if !strings.Contains(found, expected) {
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t.Errorf("Unexpected response.\nExpecting to contain: \n %q\nGot:\n %q\n", expected, found)
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}
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// And about subcommands
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expected = cmdEchoSub.Short
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if !strings.Contains(found, expected) {
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t.Errorf("Unexpected response.\nExpecting to contain: \n %q\nGot:\n %q\n", expected, found)
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}
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fmt.Fprintf(os.Stdout, "%s\n", found)
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}
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