Add env variable to suppress completion descriptions on create (#1938)

COBRA_COMPLETION_DESCRIPTIONS=0 
or 
<PROGRAM>_COMPLETION_DESCRIPTIONS=0
can now be used to disable shell completion descriptions.
This commit is contained in:
Ville Skyttä 2023-12-17 20:50:59 +02:00 committed by GitHub
parent 236f3c0418
commit e63925d321
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 237 additions and 11 deletions

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@ -17,21 +17,17 @@ package cobra
import (
"fmt"
"os"
"regexp"
"strings"
)
const (
activeHelpMarker = "_activeHelp_ "
// The below values should not be changed: programs will be using them explicitly
// in their user documentation, and users will be using them explicitly.
activeHelpEnvVarSuffix = "_ACTIVE_HELP"
activeHelpGlobalEnvVar = "COBRA_ACTIVE_HELP"
activeHelpEnvVarSuffix = "ACTIVE_HELP"
activeHelpGlobalEnvVar = configEnvVarGlobalPrefix + "_" + activeHelpEnvVarSuffix
activeHelpGlobalDisable = "0"
)
var activeHelpEnvVarPrefixSubstRegexp = regexp.MustCompile(`[^A-Z0-9_]`)
// AppendActiveHelp adds the specified string to the specified array to be used as ActiveHelp.
// Such strings will be processed by the completion script and will be shown as ActiveHelp
// to the user.
@ -60,8 +56,5 @@ func GetActiveHelpConfig(cmd *Command) string {
// variable. It has the format <PROGRAM>_ACTIVE_HELP where <PROGRAM> is the name of the
// root command in upper case, with all non-ASCII-alphanumeric characters replaced by `_`.
func activeHelpEnvVar(name string) string {
// This format should not be changed: users will be using it explicitly.
activeHelpEnvVar := strings.ToUpper(fmt.Sprintf("%s%s", name, activeHelpEnvVarSuffix))
activeHelpEnvVar = activeHelpEnvVarPrefixSubstRegexp.ReplaceAllString(activeHelpEnvVar, "_")
return activeHelpEnvVar
return configEnvVar(name, activeHelpEnvVarSuffix)
}

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@ -17,6 +17,8 @@ package cobra
import (
"fmt"
"os"
"regexp"
"strconv"
"strings"
"sync"
@ -211,7 +213,12 @@ func (c *Command) initCompleteCmd(args []string) {
// 2- Even without completions, we need to print the directive
}
noDescriptions := (cmd.CalledAs() == ShellCompNoDescRequestCmd)
noDescriptions := cmd.CalledAs() == ShellCompNoDescRequestCmd
if !noDescriptions {
if doDescriptions, err := strconv.ParseBool(getEnvConfig(cmd, configEnvVarSuffixDescriptions)); err == nil {
noDescriptions = !doDescriptions
}
}
noActiveHelp := GetActiveHelpConfig(finalCmd) == activeHelpGlobalDisable
out := finalCmd.OutOrStdout()
for _, comp := range completions {
@ -899,3 +906,34 @@ func CompError(msg string) {
func CompErrorln(msg string) {
CompError(fmt.Sprintf("%s\n", msg))
}
// These values should not be changed: users will be using them explicitly.
const (
configEnvVarGlobalPrefix = "COBRA"
configEnvVarSuffixDescriptions = "COMPLETION_DESCRIPTIONS"
)
var configEnvVarPrefixSubstRegexp = regexp.MustCompile(`[^A-Z0-9_]`)
// configEnvVar returns the name of the program-specific configuration environment
// variable. It has the format <PROGRAM>_<SUFFIX> where <PROGRAM> is the name of the
// root command in upper case, with all non-ASCII-alphanumeric characters replaced by `_`.
func configEnvVar(name, suffix string) string {
// This format should not be changed: users will be using it explicitly.
v := strings.ToUpper(fmt.Sprintf("%s_%s", name, suffix))
v = configEnvVarPrefixSubstRegexp.ReplaceAllString(v, "_")
return v
}
// getEnvConfig returns the value of the configuration environment variable
// <PROGRAM>_<SUFFIX> where <PROGRAM> is the name of the root command in upper
// case, with all non-ASCII-alphanumeric characters replaced by `_`.
// If the value is empty or not set, the value of the environment variable
// COBRA_<SUFFIX> is returned instead.
func getEnvConfig(cmd *Command, suffix string) string {
v := os.Getenv(configEnvVar(cmd.Root().Name(), suffix))
if v == "" {
v = os.Getenv(configEnvVar(configEnvVarGlobalPrefix, suffix))
}
return v
}

View File

@ -18,6 +18,7 @@ import (
"bytes"
"context"
"fmt"
"os"
"strings"
"sync"
"testing"
@ -3517,3 +3518,194 @@ func TestGetFlagCompletion(t *testing.T) {
})
}
}
func TestGetEnvConfig(t *testing.T) {
testCases := []struct {
desc string
use string
suffix string
cmdVar string
globalVar string
cmdVal string
globalVal string
expected string
}{
{
desc: "Command envvar overrides global",
use: "root",
suffix: "test",
cmdVar: "ROOT_TEST",
globalVar: "COBRA_TEST",
cmdVal: "cmd",
globalVal: "global",
expected: "cmd",
},
{
desc: "Missing/empty command envvar falls back to global",
use: "root",
suffix: "test",
cmdVar: "ROOT_TEST",
globalVar: "COBRA_TEST",
cmdVal: "",
globalVal: "global",
expected: "global",
},
{
desc: "Missing/empty command and global envvars fall back to empty",
use: "root",
suffix: "test",
cmdVar: "ROOT_TEST",
globalVar: "COBRA_TEST",
cmdVal: "",
globalVal: "",
expected: "",
},
{
desc: "Periods in command use transform to underscores in env var name",
use: "foo.bar",
suffix: "test",
cmdVar: "FOO_BAR_TEST",
globalVar: "COBRA_TEST",
cmdVal: "cmd",
globalVal: "global",
expected: "cmd",
},
{
desc: "Dashes in command use transform to underscores in env var name",
use: "quux-BAZ",
suffix: "test",
cmdVar: "QUUX_BAZ_TEST",
globalVar: "COBRA_TEST",
cmdVal: "cmd",
globalVal: "global",
expected: "cmd",
},
}
for _, tc := range testCases {
t.Run(tc.desc, func(t *testing.T) {
// Could make env handling cleaner with t.Setenv with Go >= 1.17
err := os.Setenv(tc.cmdVar, tc.cmdVal)
defer func() {
assertNoErr(t, os.Unsetenv(tc.cmdVar))
}()
assertNoErr(t, err)
err = os.Setenv(tc.globalVar, tc.globalVal)
defer func() {
assertNoErr(t, os.Unsetenv(tc.globalVar))
}()
assertNoErr(t, err)
cmd := &Command{Use: tc.use}
got := getEnvConfig(cmd, tc.suffix)
if got != tc.expected {
t.Errorf("expected: %q, got: %q", tc.expected, got)
}
})
}
}
func TestDisableDescriptions(t *testing.T) {
rootCmd := &Command{
Use: "root",
Run: emptyRun,
}
childCmd := &Command{
Use: "thechild",
Short: "The child command",
Run: emptyRun,
}
rootCmd.AddCommand(childCmd)
specificDescriptionsEnvVar := configEnvVar(rootCmd.Name(), configEnvVarSuffixDescriptions)
globalDescriptionsEnvVar := configEnvVar(configEnvVarGlobalPrefix, configEnvVarSuffixDescriptions)
const (
descLineWithDescription = "first\tdescription"
descLineWithoutDescription = "first"
)
childCmd.ValidArgsFunction = func(cmd *Command, args []string, toComplete string) ([]string, ShellCompDirective) {
comps := []string{descLineWithDescription}
return comps, ShellCompDirectiveDefault
}
testCases := []struct {
desc string
globalEnvValue string
specificEnvValue string
expectedLine string
}{
{
"No env variables set",
"",
"",
descLineWithDescription,
},
{
"Global value false",
"false",
"",
descLineWithoutDescription,
},
{
"Specific value false",
"",
"false",
descLineWithoutDescription,
},
{
"Both values false",
"false",
"false",
descLineWithoutDescription,
},
{
"Both values true",
"true",
"true",
descLineWithDescription,
},
}
for _, tc := range testCases {
t.Run(tc.desc, func(t *testing.T) {
if err := os.Setenv(specificDescriptionsEnvVar, tc.specificEnvValue); err != nil {
t.Errorf("Unexpected error setting %s: %v", specificDescriptionsEnvVar, err)
}
if err := os.Setenv(globalDescriptionsEnvVar, tc.globalEnvValue); err != nil {
t.Errorf("Unexpected error setting %s: %v", globalDescriptionsEnvVar, err)
}
var run = func() {
output, err := executeCommand(rootCmd, ShellCompRequestCmd, "thechild", "")
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
expected := strings.Join([]string{
tc.expectedLine,
":0",
"Completion ended with directive: ShellCompDirectiveDefault", ""}, "\n")
if output != expected {
t.Errorf("expected: %q, got: %q", expected, output)
}
}
run()
// For empty cases, test also unset state
if tc.specificEnvValue == "" {
if err := os.Unsetenv(specificDescriptionsEnvVar); err != nil {
t.Errorf("Unexpected error unsetting %s: %v", specificDescriptionsEnvVar, err)
}
run()
}
if tc.globalEnvValue == "" {
if err := os.Unsetenv(globalDescriptionsEnvVar); err != nil {
t.Errorf("Unexpected error unsetting %s: %v", globalDescriptionsEnvVar, err)
}
run()
}
})
}
}

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@ -393,6 +393,9 @@ $ source <(helm completion bash --no-descriptions)
$ helm completion [tab][tab]
bash fish powershell zsh
```
Setting the `<PROGRAM>_COMPLETION_DESCRIPTIONS` environment variable (falling back to `COBRA_COMPLETION_DESCRIPTIONS` if empty or not set) to a [falsey value](https://pkg.go.dev/strconv#ParseBool) achieves the same. `<PROGRAM>` is the name of your program with all non-ASCII-alphanumeric characters replaced by `_`.
## Bash completions
### Dependencies