mirror of
https://github.com/go-gitea/gitea.git
synced 2024-08-26 14:17:29 +02:00
492 lines
9.1 KiB
Go
492 lines
9.1 KiB
Go
|
// Copyright 2012 Jesse van den Kieboom. All rights reserved.
|
||
|
// Use of this source code is governed by a BSD-style
|
||
|
// license that can be found in the LICENSE file.
|
||
|
|
||
|
package flags
|
||
|
|
||
|
import (
|
||
|
"bufio"
|
||
|
"bytes"
|
||
|
"fmt"
|
||
|
"io"
|
||
|
"runtime"
|
||
|
"strings"
|
||
|
"unicode/utf8"
|
||
|
)
|
||
|
|
||
|
type alignmentInfo struct {
|
||
|
maxLongLen int
|
||
|
hasShort bool
|
||
|
hasValueName bool
|
||
|
terminalColumns int
|
||
|
indent bool
|
||
|
}
|
||
|
|
||
|
const (
|
||
|
paddingBeforeOption = 2
|
||
|
distanceBetweenOptionAndDescription = 2
|
||
|
)
|
||
|
|
||
|
func (a *alignmentInfo) descriptionStart() int {
|
||
|
ret := a.maxLongLen + distanceBetweenOptionAndDescription
|
||
|
|
||
|
if a.hasShort {
|
||
|
ret += 2
|
||
|
}
|
||
|
|
||
|
if a.maxLongLen > 0 {
|
||
|
ret += 4
|
||
|
}
|
||
|
|
||
|
if a.hasValueName {
|
||
|
ret += 3
|
||
|
}
|
||
|
|
||
|
return ret
|
||
|
}
|
||
|
|
||
|
func (a *alignmentInfo) updateLen(name string, indent bool) {
|
||
|
l := utf8.RuneCountInString(name)
|
||
|
|
||
|
if indent {
|
||
|
l = l + 4
|
||
|
}
|
||
|
|
||
|
if l > a.maxLongLen {
|
||
|
a.maxLongLen = l
|
||
|
}
|
||
|
}
|
||
|
|
||
|
func (p *Parser) getAlignmentInfo() alignmentInfo {
|
||
|
ret := alignmentInfo{
|
||
|
maxLongLen: 0,
|
||
|
hasShort: false,
|
||
|
hasValueName: false,
|
||
|
terminalColumns: getTerminalColumns(),
|
||
|
}
|
||
|
|
||
|
if ret.terminalColumns <= 0 {
|
||
|
ret.terminalColumns = 80
|
||
|
}
|
||
|
|
||
|
var prevcmd *Command
|
||
|
|
||
|
p.eachActiveGroup(func(c *Command, grp *Group) {
|
||
|
if c != prevcmd {
|
||
|
for _, arg := range c.args {
|
||
|
ret.updateLen(arg.Name, c != p.Command)
|
||
|
}
|
||
|
}
|
||
|
|
||
|
for _, info := range grp.options {
|
||
|
if !info.canCli() {
|
||
|
continue
|
||
|
}
|
||
|
|
||
|
if info.ShortName != 0 {
|
||
|
ret.hasShort = true
|
||
|
}
|
||
|
|
||
|
if len(info.ValueName) > 0 {
|
||
|
ret.hasValueName = true
|
||
|
}
|
||
|
|
||
|
l := info.LongNameWithNamespace() + info.ValueName
|
||
|
|
||
|
if len(info.Choices) != 0 {
|
||
|
l += "[" + strings.Join(info.Choices, "|") + "]"
|
||
|
}
|
||
|
|
||
|
ret.updateLen(l, c != p.Command)
|
||
|
}
|
||
|
})
|
||
|
|
||
|
return ret
|
||
|
}
|
||
|
|
||
|
func wrapText(s string, l int, prefix string) string {
|
||
|
var ret string
|
||
|
|
||
|
if l < 10 {
|
||
|
l = 10
|
||
|
}
|
||
|
|
||
|
// Basic text wrapping of s at spaces to fit in l
|
||
|
lines := strings.Split(s, "\n")
|
||
|
|
||
|
for _, line := range lines {
|
||
|
var retline string
|
||
|
|
||
|
line = strings.TrimSpace(line)
|
||
|
|
||
|
for len(line) > l {
|
||
|
// Try to split on space
|
||
|
suffix := ""
|
||
|
|
||
|
pos := strings.LastIndex(line[:l], " ")
|
||
|
|
||
|
if pos < 0 {
|
||
|
pos = l - 1
|
||
|
suffix = "-\n"
|
||
|
}
|
||
|
|
||
|
if len(retline) != 0 {
|
||
|
retline += "\n" + prefix
|
||
|
}
|
||
|
|
||
|
retline += strings.TrimSpace(line[:pos]) + suffix
|
||
|
line = strings.TrimSpace(line[pos:])
|
||
|
}
|
||
|
|
||
|
if len(line) > 0 {
|
||
|
if len(retline) != 0 {
|
||
|
retline += "\n" + prefix
|
||
|
}
|
||
|
|
||
|
retline += line
|
||
|
}
|
||
|
|
||
|
if len(ret) > 0 {
|
||
|
ret += "\n"
|
||
|
|
||
|
if len(retline) > 0 {
|
||
|
ret += prefix
|
||
|
}
|
||
|
}
|
||
|
|
||
|
ret += retline
|
||
|
}
|
||
|
|
||
|
return ret
|
||
|
}
|
||
|
|
||
|
func (p *Parser) writeHelpOption(writer *bufio.Writer, option *Option, info alignmentInfo) {
|
||
|
line := &bytes.Buffer{}
|
||
|
|
||
|
prefix := paddingBeforeOption
|
||
|
|
||
|
if info.indent {
|
||
|
prefix += 4
|
||
|
}
|
||
|
|
||
|
if option.Hidden {
|
||
|
return
|
||
|
}
|
||
|
|
||
|
line.WriteString(strings.Repeat(" ", prefix))
|
||
|
|
||
|
if option.ShortName != 0 {
|
||
|
line.WriteRune(defaultShortOptDelimiter)
|
||
|
line.WriteRune(option.ShortName)
|
||
|
} else if info.hasShort {
|
||
|
line.WriteString(" ")
|
||
|
}
|
||
|
|
||
|
descstart := info.descriptionStart() + paddingBeforeOption
|
||
|
|
||
|
if len(option.LongName) > 0 {
|
||
|
if option.ShortName != 0 {
|
||
|
line.WriteString(", ")
|
||
|
} else if info.hasShort {
|
||
|
line.WriteString(" ")
|
||
|
}
|
||
|
|
||
|
line.WriteString(defaultLongOptDelimiter)
|
||
|
line.WriteString(option.LongNameWithNamespace())
|
||
|
}
|
||
|
|
||
|
if option.canArgument() {
|
||
|
line.WriteRune(defaultNameArgDelimiter)
|
||
|
|
||
|
if len(option.ValueName) > 0 {
|
||
|
line.WriteString(option.ValueName)
|
||
|
}
|
||
|
|
||
|
if len(option.Choices) > 0 {
|
||
|
line.WriteString("[" + strings.Join(option.Choices, "|") + "]")
|
||
|
}
|
||
|
}
|
||
|
|
||
|
written := line.Len()
|
||
|
line.WriteTo(writer)
|
||
|
|
||
|
if option.Description != "" {
|
||
|
dw := descstart - written
|
||
|
writer.WriteString(strings.Repeat(" ", dw))
|
||
|
|
||
|
var def string
|
||
|
|
||
|
if len(option.DefaultMask) != 0 {
|
||
|
if option.DefaultMask != "-" {
|
||
|
def = option.DefaultMask
|
||
|
}
|
||
|
} else {
|
||
|
def = option.defaultLiteral
|
||
|
}
|
||
|
|
||
|
var envDef string
|
||
|
if option.EnvDefaultKey != "" {
|
||
|
var envPrintable string
|
||
|
if runtime.GOOS == "windows" {
|
||
|
envPrintable = "%" + option.EnvDefaultKey + "%"
|
||
|
} else {
|
||
|
envPrintable = "$" + option.EnvDefaultKey
|
||
|
}
|
||
|
envDef = fmt.Sprintf(" [%s]", envPrintable)
|
||
|
}
|
||
|
|
||
|
var desc string
|
||
|
|
||
|
if def != "" {
|
||
|
desc = fmt.Sprintf("%s (default: %v)%s", option.Description, def, envDef)
|
||
|
} else {
|
||
|
desc = option.Description + envDef
|
||
|
}
|
||
|
|
||
|
writer.WriteString(wrapText(desc,
|
||
|
info.terminalColumns-descstart,
|
||
|
strings.Repeat(" ", descstart)))
|
||
|
}
|
||
|
|
||
|
writer.WriteString("\n")
|
||
|
}
|
||
|
|
||
|
func maxCommandLength(s []*Command) int {
|
||
|
if len(s) == 0 {
|
||
|
return 0
|
||
|
}
|
||
|
|
||
|
ret := len(s[0].Name)
|
||
|
|
||
|
for _, v := range s[1:] {
|
||
|
l := len(v.Name)
|
||
|
|
||
|
if l > ret {
|
||
|
ret = l
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return ret
|
||
|
}
|
||
|
|
||
|
// WriteHelp writes a help message containing all the possible options and
|
||
|
// their descriptions to the provided writer. Note that the HelpFlag parser
|
||
|
// option provides a convenient way to add a -h/--help option group to the
|
||
|
// command line parser which will automatically show the help messages using
|
||
|
// this method.
|
||
|
func (p *Parser) WriteHelp(writer io.Writer) {
|
||
|
if writer == nil {
|
||
|
return
|
||
|
}
|
||
|
|
||
|
wr := bufio.NewWriter(writer)
|
||
|
aligninfo := p.getAlignmentInfo()
|
||
|
|
||
|
cmd := p.Command
|
||
|
|
||
|
for cmd.Active != nil {
|
||
|
cmd = cmd.Active
|
||
|
}
|
||
|
|
||
|
if p.Name != "" {
|
||
|
wr.WriteString("Usage:\n")
|
||
|
wr.WriteString(" ")
|
||
|
|
||
|
allcmd := p.Command
|
||
|
|
||
|
for allcmd != nil {
|
||
|
var usage string
|
||
|
|
||
|
if allcmd == p.Command {
|
||
|
if len(p.Usage) != 0 {
|
||
|
usage = p.Usage
|
||
|
} else if p.Options&HelpFlag != 0 {
|
||
|
usage = "[OPTIONS]"
|
||
|
}
|
||
|
} else if us, ok := allcmd.data.(Usage); ok {
|
||
|
usage = us.Usage()
|
||
|
} else if allcmd.hasCliOptions() {
|
||
|
usage = fmt.Sprintf("[%s-OPTIONS]", allcmd.Name)
|
||
|
}
|
||
|
|
||
|
if len(usage) != 0 {
|
||
|
fmt.Fprintf(wr, " %s %s", allcmd.Name, usage)
|
||
|
} else {
|
||
|
fmt.Fprintf(wr, " %s", allcmd.Name)
|
||
|
}
|
||
|
|
||
|
if len(allcmd.args) > 0 {
|
||
|
fmt.Fprintf(wr, " ")
|
||
|
}
|
||
|
|
||
|
for i, arg := range allcmd.args {
|
||
|
if i != 0 {
|
||
|
fmt.Fprintf(wr, " ")
|
||
|
}
|
||
|
|
||
|
name := arg.Name
|
||
|
|
||
|
if arg.isRemaining() {
|
||
|
name = name + "..."
|
||
|
}
|
||
|
|
||
|
if !allcmd.ArgsRequired {
|
||
|
fmt.Fprintf(wr, "[%s]", name)
|
||
|
} else {
|
||
|
fmt.Fprintf(wr, "%s", name)
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if allcmd.Active == nil && len(allcmd.commands) > 0 {
|
||
|
var co, cc string
|
||
|
|
||
|
if allcmd.SubcommandsOptional {
|
||
|
co, cc = "[", "]"
|
||
|
} else {
|
||
|
co, cc = "<", ">"
|
||
|
}
|
||
|
|
||
|
visibleCommands := allcmd.visibleCommands()
|
||
|
|
||
|
if len(visibleCommands) > 3 {
|
||
|
fmt.Fprintf(wr, " %scommand%s", co, cc)
|
||
|
} else {
|
||
|
subcommands := allcmd.sortedVisibleCommands()
|
||
|
names := make([]string, len(subcommands))
|
||
|
|
||
|
for i, subc := range subcommands {
|
||
|
names[i] = subc.Name
|
||
|
}
|
||
|
|
||
|
fmt.Fprintf(wr, " %s%s%s", co, strings.Join(names, " | "), cc)
|
||
|
}
|
||
|
}
|
||
|
|
||
|
allcmd = allcmd.Active
|
||
|
}
|
||
|
|
||
|
fmt.Fprintln(wr)
|
||
|
|
||
|
if len(cmd.LongDescription) != 0 {
|
||
|
fmt.Fprintln(wr)
|
||
|
|
||
|
t := wrapText(cmd.LongDescription,
|
||
|
aligninfo.terminalColumns,
|
||
|
"")
|
||
|
|
||
|
fmt.Fprintln(wr, t)
|
||
|
}
|
||
|
}
|
||
|
|
||
|
c := p.Command
|
||
|
|
||
|
for c != nil {
|
||
|
printcmd := c != p.Command
|
||
|
|
||
|
c.eachGroup(func(grp *Group) {
|
||
|
first := true
|
||
|
|
||
|
// Skip built-in help group for all commands except the top-level
|
||
|
// parser
|
||
|
if grp.Hidden || (grp.isBuiltinHelp && c != p.Command) {
|
||
|
return
|
||
|
}
|
||
|
|
||
|
for _, info := range grp.options {
|
||
|
if !info.canCli() || info.Hidden {
|
||
|
continue
|
||
|
}
|
||
|
|
||
|
if printcmd {
|
||
|
fmt.Fprintf(wr, "\n[%s command options]\n", c.Name)
|
||
|
aligninfo.indent = true
|
||
|
printcmd = false
|
||
|
}
|
||
|
|
||
|
if first && cmd.Group != grp {
|
||
|
fmt.Fprintln(wr)
|
||
|
|
||
|
if aligninfo.indent {
|
||
|
wr.WriteString(" ")
|
||
|
}
|
||
|
|
||
|
fmt.Fprintf(wr, "%s:\n", grp.ShortDescription)
|
||
|
first = false
|
||
|
}
|
||
|
|
||
|
p.writeHelpOption(wr, info, aligninfo)
|
||
|
}
|
||
|
})
|
||
|
|
||
|
var args []*Arg
|
||
|
for _, arg := range c.args {
|
||
|
if arg.Description != "" {
|
||
|
args = append(args, arg)
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if len(args) > 0 {
|
||
|
if c == p.Command {
|
||
|
fmt.Fprintf(wr, "\nArguments:\n")
|
||
|
} else {
|
||
|
fmt.Fprintf(wr, "\n[%s command arguments]\n", c.Name)
|
||
|
}
|
||
|
|
||
|
descStart := aligninfo.descriptionStart() + paddingBeforeOption
|
||
|
|
||
|
for _, arg := range args {
|
||
|
argPrefix := strings.Repeat(" ", paddingBeforeOption)
|
||
|
argPrefix += arg.Name
|
||
|
|
||
|
if len(arg.Description) > 0 {
|
||
|
argPrefix += ":"
|
||
|
wr.WriteString(argPrefix)
|
||
|
|
||
|
// Space between "arg:" and the description start
|
||
|
descPadding := strings.Repeat(" ", descStart-len(argPrefix))
|
||
|
// How much space the description gets before wrapping
|
||
|
descWidth := aligninfo.terminalColumns - 1 - descStart
|
||
|
// Whitespace to which we can indent new description lines
|
||
|
descPrefix := strings.Repeat(" ", descStart)
|
||
|
|
||
|
wr.WriteString(descPadding)
|
||
|
wr.WriteString(wrapText(arg.Description, descWidth, descPrefix))
|
||
|
} else {
|
||
|
wr.WriteString(argPrefix)
|
||
|
}
|
||
|
|
||
|
fmt.Fprintln(wr)
|
||
|
}
|
||
|
}
|
||
|
|
||
|
c = c.Active
|
||
|
}
|
||
|
|
||
|
scommands := cmd.sortedVisibleCommands()
|
||
|
|
||
|
if len(scommands) > 0 {
|
||
|
maxnamelen := maxCommandLength(scommands)
|
||
|
|
||
|
fmt.Fprintln(wr)
|
||
|
fmt.Fprintln(wr, "Available commands:")
|
||
|
|
||
|
for _, c := range scommands {
|
||
|
fmt.Fprintf(wr, " %s", c.Name)
|
||
|
|
||
|
if len(c.ShortDescription) > 0 {
|
||
|
pad := strings.Repeat(" ", maxnamelen-len(c.Name))
|
||
|
fmt.Fprintf(wr, "%s %s", pad, c.ShortDescription)
|
||
|
|
||
|
if len(c.Aliases) > 0 {
|
||
|
fmt.Fprintf(wr, " (aliases: %s)", strings.Join(c.Aliases, ", "))
|
||
|
}
|
||
|
|
||
|
}
|
||
|
|
||
|
fmt.Fprintln(wr)
|
||
|
}
|
||
|
}
|
||
|
|
||
|
wr.Flush()
|
||
|
}
|