cobra/md_docs.go
Eric Paris 8a18f25809 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.
2015-04-12 14:40:34 -04:00

122 lines
3.0 KiB
Go

//Copyright 2015 Red Hat Inc. All rights reserved.
//
// 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 cobra
import (
"bytes"
"fmt"
"os"
"sort"
"strings"
"time"
)
func printOptions(out *bytes.Buffer, cmd *Command, name string) {
flags := cmd.NonInheritedFlags()
flags.SetOutput(out)
if flags.HasFlags() {
fmt.Fprintf(out, "### Options\n\n```\n")
flags.PrintDefaults()
fmt.Fprintf(out, "```\n\n")
}
parentFlags := cmd.InheritedFlags()
parentFlags.SetOutput(out)
if parentFlags.HasFlags() {
fmt.Fprintf(out, "### Options inherrited from parent commands\n\n```\n")
parentFlags.PrintDefaults()
fmt.Fprintf(out, "```\n\n")
}
}
type byName []*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() }
func GenMarkdown(cmd *Command, out *bytes.Buffer) {
name := cmd.CommandPath()
short := cmd.Short
long := cmd.Long
if len(long) == 0 {
long = short
}
fmt.Fprintf(out, "## %s\n\n", name)
fmt.Fprintf(out, "%s\n\n", short)
fmt.Fprintf(out, "### Synopsis\n\n")
fmt.Fprintf(out, "\n%s\n\n", long)
if cmd.Runnable() {
fmt.Fprintf(out, "```\n%s\n```\n\n", cmd.UseLine())
}
if len(cmd.Example) > 0 {
fmt.Fprintf(out, "### Examples\n\n")
fmt.Fprintf(out, "```\n%s\n```\n\n", cmd.Example)
}
printOptions(out, cmd, name)
if len(cmd.Commands()) > 0 || cmd.HasParent() {
fmt.Fprintf(out, "### SEE ALSO\n")
if cmd.HasParent() {
parent := cmd.Parent()
pname := parent.CommandPath()
link := pname + ".md"
link = strings.Replace(link, " ", "_", -1)
fmt.Fprintf(out, "* [%s](%s)\t - %s\n", pname, link, parent.Short)
}
children := cmd.Commands()
sort.Sort(byName(children))
for _, child := range children {
cname := name + " " + child.Name()
link := cname + ".md"
link = strings.Replace(link, " ", "_", -1)
fmt.Fprintf(out, "* [%s](%s)\t - %s\n", cname, link, child.Short)
}
fmt.Fprintf(out, "\n")
}
fmt.Fprintf(out, "###### Auto generated by spf13/cobra at %s\n", time.Now().UTC())
}
func GenMarkdownTree(cmd *Command, dir string) {
for _, c := range cmd.Commands() {
GenMarkdownTree(c, dir)
}
out := new(bytes.Buffer)
GenMarkdown(cmd, out)
filename := cmd.CommandPath()
filename = dir + strings.Replace(filename, " ", "_", -1) + ".md"
outFile, err := os.Create(filename)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
defer outFile.Close()
_, err = outFile.Write(out.Bytes())
if err != nil {
fmt.Println(err)
os.Exit(1)
}
}