spf13--cobra/man_docs.go

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2015-08-18 22:33:41 +00:00
// 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"
mangen "github.com/cpuguy83/go-md2man/md2man"
"github.com/spf13/pflag"
)
func GenManTree(cmd *Command, projectName, dir string) {
cmd.GenManTree(projectName, dir)
}
func (cmd *Command) GenManTree(projectName, dir string) {
for _, c := range cmd.Commands() {
if len(c.Deprecated) != 0 || c == cmd.helpCommand {
continue
}
GenManTree(c, projectName, dir)
}
out := new(bytes.Buffer)
cmd.GenMan(projectName, out)
filename := cmd.CommandPath()
filename = dir + strings.Replace(filename, " ", "-", -1) + ".1"
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)
}
}
func GenMan(cmd *Command, projectName string, out *bytes.Buffer) {
cmd.GenMan(projectName, out)
}
func (cmd *Command) GenMan(projectName string, out *bytes.Buffer) {
buf := genMarkdown(cmd, projectName)
final := mangen.Render(buf)
out.Write(final)
}
func manPreamble(out *bytes.Buffer, projectName, name, short, long string) {
fmt.Fprintf(out, `%% %s(1) kubernetes User Manuals
%% Eric Paris
%% Jan 2015
# NAME
`, projectName)
fmt.Fprintf(out, "%s \\- %s\n\n", name, short)
fmt.Fprintf(out, "# SYNOPSIS\n")
fmt.Fprintf(out, "**%s** [OPTIONS]\n\n", name)
fmt.Fprintf(out, "# DESCRIPTION\n")
fmt.Fprintf(out, "%s\n\n", long)
}
func manPrintFlags(out *bytes.Buffer, flags *pflag.FlagSet) {
flags.VisitAll(func(flag *pflag.Flag) {
if len(flag.Deprecated) > 0 {
return
}
format := ""
if len(flag.Shorthand) > 0 {
format = "**-%s**, **--%s**"
} else {
format = "%s**--%s**"
}
if len(flag.NoOptDefVal) > 0 {
format = format + "["
}
if flag.Value.Type() == "string" {
// put quotes on the value
format = format + "=%q"
} else {
format = format + "=%s"
}
if len(flag.NoOptDefVal) > 0 {
format = format + "]"
}
format = format + "\n\t%s\n\n"
fmt.Fprintf(out, format, flag.Shorthand, flag.Name, flag.DefValue, flag.Usage)
})
}
func manPrintOptions(out *bytes.Buffer, command *Command) {
flags := command.NonInheritedFlags()
if flags.HasFlags() {
fmt.Fprintf(out, "# OPTIONS\n")
manPrintFlags(out, flags)
fmt.Fprintf(out, "\n")
}
flags = command.InheritedFlags()
if flags.HasFlags() {
fmt.Fprintf(out, "# OPTIONS INHERITED FROM PARENT COMMANDS\n")
manPrintFlags(out, flags)
fmt.Fprintf(out, "\n")
}
}
func genMarkdown(cmd *Command, projectName string) []byte {
// something like `rootcmd subcmd1 subcmd2`
commandName := cmd.CommandPath()
// something like `rootcmd-subcmd1-subcmd2`
dashCommandName := strings.Replace(commandName, " ", "-", -1)
buf := new(bytes.Buffer)
short := cmd.Short
long := cmd.Long
if len(long) == 0 {
long = short
}
manPreamble(buf, projectName, commandName, short, long)
manPrintOptions(buf, cmd)
if len(cmd.Example) > 0 {
fmt.Fprintf(buf, "# EXAMPLE\n")
fmt.Fprintf(buf, "```\n%s\n```\n", cmd.Example)
}
if cmd.hasSeeAlso() {
fmt.Fprintf(buf, "# SEE ALSO\n")
if cmd.HasParent() {
fmt.Fprintf(buf, "**%s(1)**, ", cmd.Parent().CommandPath())
}
children := cmd.Commands()
sort.Sort(byName(children))
for _, c := range children {
if len(c.Deprecated) != 0 || c == cmd.helpCommand {
continue
}
fmt.Fprintf(buf, "**%s-%s(1)**, ", dashCommandName, c.Name())
}
fmt.Fprintf(buf, "\n")
}
fmt.Fprintf(buf, "# HISTORY\n%s Auto generated by spf13/cobra\n", time.Now().UTC())
return buf.Bytes()
}