Function EnvVarNames

cli/command/completion/functions.go:158–168

EnvVarNames offers completion for environment-variable names. This completion can be used for "--env" and "--build-arg" flags, which allow obtaining the value of the given environment-variable if present in the local environment, so we only should complete the names of the environment variables, and

()

//	docker run --rm --env MY_VAR alpine printenv MY_VAR
//	hello
func EnvVarNames() cobra.CompletionFunc {
	return Unique(func(_ *cobra.Command, _ []string, _ string) (names []string, _ cobra.ShellCompDirective) {
		envs := os.Environ()
		names = make([]string, 0, len(envs))
		for _, env := range envs {
			name, _, _ := strings.Cut(env, "=")
			names = append(names, name)
		}
		return names, cobra.ShellCompDirectiveNoFileComp
	})
}

// FromList offers completion for the given list of options.
func FromList(options ...string) cobra.CompletionFunc {