You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
240 lines
7.1 KiB
Go
240 lines
7.1 KiB
Go
// Copyright 2013-2023 The Cobra Authors
|
|
//
|
|
// 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.
|
|
|
|
// Commands similar to git, go tools and other modern CLI tools
|
|
// inspired by go, go-Commander, gh and subcommand
|
|
|
|
package cobra
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"reflect"
|
|
"strconv"
|
|
"strings"
|
|
"text/template"
|
|
"time"
|
|
"unicode"
|
|
)
|
|
|
|
var templateFuncs = template.FuncMap{
|
|
"trim": strings.TrimSpace,
|
|
"trimRightSpace": trimRightSpace,
|
|
"trimTrailingWhitespaces": trimRightSpace,
|
|
"appendIfNotPresent": appendIfNotPresent,
|
|
"rpad": rpad,
|
|
"gt": Gt,
|
|
"eq": Eq,
|
|
}
|
|
|
|
var initializers []func()
|
|
var finalizers []func()
|
|
|
|
const (
|
|
defaultPrefixMatching = false
|
|
defaultCommandSorting = true
|
|
defaultCaseInsensitive = false
|
|
)
|
|
|
|
// EnablePrefixMatching allows to set automatic prefix matching. Automatic prefix matching can be a dangerous thing
|
|
// to automatically enable in CLI tools.
|
|
// Set this to true to enable it.
|
|
var EnablePrefixMatching = defaultPrefixMatching
|
|
|
|
// EnableCommandSorting controls sorting of the slice of commands, which is turned on by default.
|
|
// To disable sorting, set it to false.
|
|
var EnableCommandSorting = defaultCommandSorting
|
|
|
|
// EnableCaseInsensitive allows case-insensitive commands names. (case sensitive by default)
|
|
var EnableCaseInsensitive = defaultCaseInsensitive
|
|
|
|
// MousetrapHelpText enables an information splash screen on Windows
|
|
// if the CLI is started from explorer.exe.
|
|
// To disable the mousetrap, just set this variable to blank string ("").
|
|
// Works only on Microsoft Windows.
|
|
var MousetrapHelpText = `This is a command line tool.
|
|
|
|
You need to open cmd.exe and run it from there.
|
|
`
|
|
|
|
// MousetrapDisplayDuration controls how long the MousetrapHelpText message is displayed on Windows
|
|
// if the CLI is started from explorer.exe. Set to 0 to wait for the return key to be pressed.
|
|
// To disable the mousetrap, just set MousetrapHelpText to blank string ("").
|
|
// Works only on Microsoft Windows.
|
|
var MousetrapDisplayDuration = 5 * time.Second
|
|
|
|
// AddTemplateFunc adds a template function that's available to Usage and Help
|
|
// template generation.
|
|
func AddTemplateFunc(name string, tmplFunc interface{}) {
|
|
templateFuncs[name] = tmplFunc
|
|
}
|
|
|
|
// AddTemplateFuncs adds multiple template functions that are available to Usage and
|
|
// Help template generation.
|
|
func AddTemplateFuncs(tmplFuncs template.FuncMap) {
|
|
for k, v := range tmplFuncs {
|
|
templateFuncs[k] = v
|
|
}
|
|
}
|
|
|
|
// OnInitialize sets the passed functions to be run when each command's
|
|
// Execute method is called.
|
|
func OnInitialize(y ...func()) {
|
|
initializers = append(initializers, y...)
|
|
}
|
|
|
|
// OnFinalize sets the passed functions to be run when each command's
|
|
// Execute method is terminated.
|
|
func OnFinalize(y ...func()) {
|
|
finalizers = append(finalizers, y...)
|
|
}
|
|
|
|
// FIXME Gt is unused by cobra and should be removed in a version 2. It exists only for compatibility with users of cobra.
|
|
|
|
// Gt takes two types and checks whether the first type is greater than the second. In case of types Arrays, Chans,
|
|
// Maps and Slices, Gt will compare their lengths. Ints are compared directly while strings are first parsed as
|
|
// ints and then compared.
|
|
func Gt(a interface{}, b interface{}) bool {
|
|
var left, right int64
|
|
av := reflect.ValueOf(a)
|
|
|
|
switch av.Kind() {
|
|
case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
|
|
left = int64(av.Len())
|
|
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
|
left = av.Int()
|
|
case reflect.String:
|
|
left, _ = strconv.ParseInt(av.String(), 10, 64)
|
|
}
|
|
|
|
bv := reflect.ValueOf(b)
|
|
|
|
switch bv.Kind() {
|
|
case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
|
|
right = int64(bv.Len())
|
|
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
|
right = bv.Int()
|
|
case reflect.String:
|
|
right, _ = strconv.ParseInt(bv.String(), 10, 64)
|
|
}
|
|
|
|
return left > right
|
|
}
|
|
|
|
// FIXME Eq is unused by cobra and should be removed in a version 2. It exists only for compatibility with users of cobra.
|
|
|
|
// Eq takes two types and checks whether they are equal. Supported types are int and string. Unsupported types will panic.
|
|
func Eq(a interface{}, b interface{}) bool {
|
|
av := reflect.ValueOf(a)
|
|
bv := reflect.ValueOf(b)
|
|
|
|
switch av.Kind() {
|
|
case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
|
|
panic("Eq called on unsupported type")
|
|
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
|
return av.Int() == bv.Int()
|
|
case reflect.String:
|
|
return av.String() == bv.String()
|
|
}
|
|
return false
|
|
}
|
|
|
|
func trimRightSpace(s string) string {
|
|
return strings.TrimRightFunc(s, unicode.IsSpace)
|
|
}
|
|
|
|
// FIXME appendIfNotPresent is unused by cobra and should be removed in a version 2. It exists only for compatibility with users of cobra.
|
|
|
|
// appendIfNotPresent will append stringToAppend to the end of s, but only if it's not yet present in s.
|
|
func appendIfNotPresent(s, stringToAppend string) string {
|
|
if strings.Contains(s, stringToAppend) {
|
|
return s
|
|
}
|
|
return s + " " + stringToAppend
|
|
}
|
|
|
|
// rpad adds padding to the right of a string.
|
|
func rpad(s string, padding int) string {
|
|
formattedString := fmt.Sprintf("%%-%ds", padding)
|
|
return fmt.Sprintf(formattedString, s)
|
|
}
|
|
|
|
// tmpl executes the given template text on data, writing the result to w.
|
|
func tmpl(w io.Writer, text string, data interface{}) error {
|
|
t := template.New("top")
|
|
t.Funcs(templateFuncs)
|
|
template.Must(t.Parse(text))
|
|
return t.Execute(w, data)
|
|
}
|
|
|
|
// ld compares two strings and returns the levenshtein distance between them.
|
|
func ld(s, t string, ignoreCase bool) int {
|
|
if ignoreCase {
|
|
s = strings.ToLower(s)
|
|
t = strings.ToLower(t)
|
|
}
|
|
d := make([][]int, len(s)+1)
|
|
for i := range d {
|
|
d[i] = make([]int, len(t)+1)
|
|
}
|
|
for i := range d {
|
|
d[i][0] = i
|
|
}
|
|
for j := range d[0] {
|
|
d[0][j] = j
|
|
}
|
|
for j := 1; j <= len(t); j++ {
|
|
for i := 1; i <= len(s); i++ {
|
|
if s[i-1] == t[j-1] {
|
|
d[i][j] = d[i-1][j-1]
|
|
} else {
|
|
min := d[i-1][j]
|
|
if d[i][j-1] < min {
|
|
min = d[i][j-1]
|
|
}
|
|
if d[i-1][j-1] < min {
|
|
min = d[i-1][j-1]
|
|
}
|
|
d[i][j] = min + 1
|
|
}
|
|
}
|
|
|
|
}
|
|
return d[len(s)][len(t)]
|
|
}
|
|
|
|
func stringInSlice(a string, list []string) bool {
|
|
for _, b := range list {
|
|
if b == a {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// CheckErr prints the msg with the prefix 'Error:' and exits with error code 1. If the msg is nil, it does nothing.
|
|
func CheckErr(msg interface{}) {
|
|
if msg != nil {
|
|
fmt.Fprintln(os.Stderr, "Error:", msg)
|
|
os.Exit(1)
|
|
}
|
|
}
|
|
|
|
// WriteStringAndCheck writes a string into a buffer, and checks if the error is not nil.
|
|
func WriteStringAndCheck(b io.StringWriter, s string) {
|
|
_, err := b.WriteString(s)
|
|
CheckErr(err)
|
|
}
|