291 lines
9.2 KiB
Go
291 lines
9.2 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.
|
|
|
|
package cobra
|
|
|
|
import (
|
|
"fmt"
|
|
"sort"
|
|
"strings"
|
|
|
|
flag "github.com/spf13/pflag"
|
|
)
|
|
|
|
const (
|
|
requiredAsGroup = "cobra_annotation_required_if_others_set"
|
|
oneRequired = "cobra_annotation_one_required"
|
|
mutuallyExclusive = "cobra_annotation_mutually_exclusive"
|
|
)
|
|
|
|
// MarkFlagsRequiredTogether marks the given flags with annotations so that Cobra errors
|
|
// if the command is invoked with a subset (but not all) of the given flags.
|
|
func (c *Command) MarkFlagsRequiredTogether(flagNames ...string) {
|
|
c.mergePersistentFlags()
|
|
for _, v := range flagNames {
|
|
f := c.Flags().Lookup(v)
|
|
if f == nil {
|
|
panic(fmt.Sprintf("Failed to find flag %q and mark it as being required in a flag group", v))
|
|
}
|
|
if err := c.Flags().SetAnnotation(v, requiredAsGroup, append(f.Annotations[requiredAsGroup], strings.Join(flagNames, " "))); err != nil {
|
|
// Only errs if the flag isn't found.
|
|
panic(err)
|
|
}
|
|
}
|
|
}
|
|
|
|
// MarkFlagsOneRequired marks the given flags with annotations so that Cobra errors
|
|
// if the command is invoked without at least one flag from the given set of flags.
|
|
func (c *Command) MarkFlagsOneRequired(flagNames ...string) {
|
|
c.mergePersistentFlags()
|
|
for _, v := range flagNames {
|
|
f := c.Flags().Lookup(v)
|
|
if f == nil {
|
|
panic(fmt.Sprintf("Failed to find flag %q and mark it as being in a one-required flag group", v))
|
|
}
|
|
if err := c.Flags().SetAnnotation(v, oneRequired, append(f.Annotations[oneRequired], strings.Join(flagNames, " "))); err != nil {
|
|
// Only errs if the flag isn't found.
|
|
panic(err)
|
|
}
|
|
}
|
|
}
|
|
|
|
// MarkFlagsMutuallyExclusive marks the given flags with annotations so that Cobra errors
|
|
// if the command is invoked with more than one flag from the given set of flags.
|
|
func (c *Command) MarkFlagsMutuallyExclusive(flagNames ...string) {
|
|
c.mergePersistentFlags()
|
|
for _, v := range flagNames {
|
|
f := c.Flags().Lookup(v)
|
|
if f == nil {
|
|
panic(fmt.Sprintf("Failed to find flag %q and mark it as being in a mutually exclusive flag group", v))
|
|
}
|
|
// Each time this is called is a single new entry; this allows it to be a member of multiple groups if needed.
|
|
if err := c.Flags().SetAnnotation(v, mutuallyExclusive, append(f.Annotations[mutuallyExclusive], strings.Join(flagNames, " "))); err != nil {
|
|
panic(err)
|
|
}
|
|
}
|
|
}
|
|
|
|
// ValidateFlagGroups validates the mutuallyExclusive/oneRequired/requiredAsGroup logic and returns the
|
|
// first error encountered.
|
|
func (c *Command) ValidateFlagGroups() error {
|
|
if c.DisableFlagParsing {
|
|
return nil
|
|
}
|
|
|
|
flags := c.Flags()
|
|
|
|
// groupStatus format is the list of flags as a unique ID,
|
|
// then a map of each flag name and whether it is set or not.
|
|
groupStatus := map[string]map[string]bool{}
|
|
oneRequiredGroupStatus := map[string]map[string]bool{}
|
|
mutuallyExclusiveGroupStatus := map[string]map[string]bool{}
|
|
flags.VisitAll(func(pflag *flag.Flag) {
|
|
processFlagForGroupAnnotation(flags, pflag, requiredAsGroup, groupStatus)
|
|
processFlagForGroupAnnotation(flags, pflag, oneRequired, oneRequiredGroupStatus)
|
|
processFlagForGroupAnnotation(flags, pflag, mutuallyExclusive, mutuallyExclusiveGroupStatus)
|
|
})
|
|
|
|
if err := validateRequiredFlagGroups(groupStatus); err != nil {
|
|
return err
|
|
}
|
|
if err := validateOneRequiredFlagGroups(oneRequiredGroupStatus); err != nil {
|
|
return err
|
|
}
|
|
if err := validateExclusiveFlagGroups(mutuallyExclusiveGroupStatus); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func hasAllFlags(fs *flag.FlagSet, flagnames ...string) bool {
|
|
for _, fname := range flagnames {
|
|
f := fs.Lookup(fname)
|
|
if f == nil {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func processFlagForGroupAnnotation(flags *flag.FlagSet, pflag *flag.Flag, annotation string, groupStatus map[string]map[string]bool) {
|
|
groupInfo, found := pflag.Annotations[annotation]
|
|
if found {
|
|
for _, group := range groupInfo {
|
|
if groupStatus[group] == nil {
|
|
flagnames := strings.Split(group, " ")
|
|
|
|
// Only consider this flag group at all if all the flags are defined.
|
|
if !hasAllFlags(flags, flagnames...) {
|
|
continue
|
|
}
|
|
|
|
groupStatus[group] = map[string]bool{}
|
|
for _, name := range flagnames {
|
|
groupStatus[group][name] = false
|
|
}
|
|
}
|
|
|
|
groupStatus[group][pflag.Name] = pflag.Changed
|
|
}
|
|
}
|
|
}
|
|
|
|
func validateRequiredFlagGroups(data map[string]map[string]bool) error {
|
|
keys := sortedKeys(data)
|
|
for _, flagList := range keys {
|
|
flagnameAndStatus := data[flagList]
|
|
|
|
unset := []string{}
|
|
for flagname, isSet := range flagnameAndStatus {
|
|
if !isSet {
|
|
unset = append(unset, flagname)
|
|
}
|
|
}
|
|
if len(unset) == len(flagnameAndStatus) || len(unset) == 0 {
|
|
continue
|
|
}
|
|
|
|
// Sort values, so they can be tested/scripted against consistently.
|
|
sort.Strings(unset)
|
|
return fmt.Errorf("if any flags in the group [%v] are set they must all be set; missing %v", flagList, unset)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func validateOneRequiredFlagGroups(data map[string]map[string]bool) error {
|
|
keys := sortedKeys(data)
|
|
for _, flagList := range keys {
|
|
flagnameAndStatus := data[flagList]
|
|
var set []string
|
|
for flagname, isSet := range flagnameAndStatus {
|
|
if isSet {
|
|
set = append(set, flagname)
|
|
}
|
|
}
|
|
if len(set) >= 1 {
|
|
continue
|
|
}
|
|
|
|
// Sort values, so they can be tested/scripted against consistently.
|
|
sort.Strings(set)
|
|
return fmt.Errorf("at least one of the flags in the group [%v] is required", flagList)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func validateExclusiveFlagGroups(data map[string]map[string]bool) error {
|
|
keys := sortedKeys(data)
|
|
for _, flagList := range keys {
|
|
flagnameAndStatus := data[flagList]
|
|
var set []string
|
|
for flagname, isSet := range flagnameAndStatus {
|
|
if isSet {
|
|
set = append(set, flagname)
|
|
}
|
|
}
|
|
if len(set) == 0 || len(set) == 1 {
|
|
continue
|
|
}
|
|
|
|
// Sort values, so they can be tested/scripted against consistently.
|
|
sort.Strings(set)
|
|
return fmt.Errorf("if any flags in the group [%v] are set none of the others can be; %v were all set", flagList, set)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func sortedKeys(m map[string]map[string]bool) []string {
|
|
keys := make([]string, len(m))
|
|
i := 0
|
|
for k := range m {
|
|
keys[i] = k
|
|
i++
|
|
}
|
|
sort.Strings(keys)
|
|
return keys
|
|
}
|
|
|
|
// enforceFlagGroupsForCompletion will do the following:
|
|
// - when a flag in a group is present, other flags in the group will be marked required
|
|
// - when none of the flags in a one-required group are present, all flags in the group will be marked required
|
|
// - when a flag in a mutually exclusive group is present, other flags in the group will be marked as hidden
|
|
// This allows the standard completion logic to behave appropriately for flag groups
|
|
func (c *Command) enforceFlagGroupsForCompletion() {
|
|
if c.DisableFlagParsing {
|
|
return
|
|
}
|
|
|
|
flags := c.Flags()
|
|
groupStatus := map[string]map[string]bool{}
|
|
oneRequiredGroupStatus := map[string]map[string]bool{}
|
|
mutuallyExclusiveGroupStatus := map[string]map[string]bool{}
|
|
c.Flags().VisitAll(func(pflag *flag.Flag) {
|
|
processFlagForGroupAnnotation(flags, pflag, requiredAsGroup, groupStatus)
|
|
processFlagForGroupAnnotation(flags, pflag, oneRequired, oneRequiredGroupStatus)
|
|
processFlagForGroupAnnotation(flags, pflag, mutuallyExclusive, mutuallyExclusiveGroupStatus)
|
|
})
|
|
|
|
// If a flag that is part of a group is present, we make all the other flags
|
|
// of that group required so that the shell completion suggests them automatically
|
|
for flagList, flagnameAndStatus := range groupStatus {
|
|
for _, isSet := range flagnameAndStatus {
|
|
if isSet {
|
|
// One of the flags of the group is set, mark the other ones as required
|
|
for _, fName := range strings.Split(flagList, " ") {
|
|
_ = c.MarkFlagRequired(fName)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// If none of the flags of a one-required group are present, we make all the flags
|
|
// of that group required so that the shell completion suggests them automatically
|
|
for flagList, flagnameAndStatus := range oneRequiredGroupStatus {
|
|
set := 0
|
|
|
|
for _, isSet := range flagnameAndStatus {
|
|
if isSet {
|
|
set++
|
|
}
|
|
}
|
|
|
|
// None of the flags of the group are set, mark all flags in the group
|
|
// as required
|
|
if set == 0 {
|
|
for _, fName := range strings.Split(flagList, " ") {
|
|
_ = c.MarkFlagRequired(fName)
|
|
}
|
|
}
|
|
}
|
|
|
|
// If a flag that is mutually exclusive to others is present, we hide the other
|
|
// flags of that group so the shell completion does not suggest them
|
|
for flagList, flagnameAndStatus := range mutuallyExclusiveGroupStatus {
|
|
for flagName, isSet := range flagnameAndStatus {
|
|
if isSet {
|
|
// One of the flags of the mutually exclusive group is set, mark the other ones as hidden
|
|
// Don't mark the flag that is already set as hidden because it may be an
|
|
// array or slice flag and therefore must continue being suggested
|
|
for _, fName := range strings.Split(flagList, " ") {
|
|
if fName != flagName {
|
|
flag := c.Flags().Lookup(fName)
|
|
flag.Hidden = true
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|