use newer and supported bashv2 completion in order to have dynamic completion

Author: umbynos

Diff for: cli/completion/completion.go

@@ -47,13 +47,13 @@ func NewCommand() *cobra.Command {
 }
 
 func run(cmd *cobra.Command, args []string) {
-	if completionNoDesc && (args[0] == "bash" || args[0] == "powershell") {
+	if completionNoDesc && (args[0] == "powershell") {
 		feedback.Errorf(tr("Error: command description is not supported by %v"), args[0])
 		os.Exit(errorcodes.ErrGeneric)
 	}
 	switch args[0] {
 	case "bash":
-		cmd.Root().GenBashCompletion(os.Stdout)
+		cmd.Root().GenBashCompletionV2(os.Stdout, !completionNoDesc)
 		break
 	case "zsh":
 		if completionNoDesc {

Diff for: test/test_completion.py

@@ -25,7 +25,7 @@ def test_completion_bash(run_command):
     result = run_command("completion bash")
     assert result.ok
     assert result.stderr == ""
-    assert "_arduino-cli_root_command()" in result.stdout
+    assert "# bash completion V2 for arduino-cli" in result.stdout
     assert "__start_arduino-cli()" in result.stdout
 
 
@@ -55,9 +55,11 @@ def test_completion_powershell(run_command):
 
 def test_completion_bash_no_desc(run_command):
     result = run_command("completion bash --no-descriptions")
-    assert not result.ok
-    assert result.stdout == ""
-    assert "Error: command description is not supported by bash" in result.stderr
+    assert result.ok
+    assert result.stderr == ""
+    assert "# bash completion V2 for arduino-cli" in result.stdout
+    assert "__start_arduino-cli()" in result.stdout
+    assert "__completeNoDesc" in result.stdout
 
 
 def test_completion_zsh_no_desc(run_command):