4.3.2->4.6.1 regression, incorrect autocompletion is generated for subcommand aliases, because of which autocomplete does not work for subcommand specified by alias.

[alfonz19]

TLDR autocompletion does not work for aliases.

Command defined as:

@CommandLine.Command(description = "Receive avro messages from kafka",
        usageHelpWidth = 120,
        name = "receive-avro-from-kafka",
        aliases = {"rafk"})
public class ReceiveAvroMessagesFromKafka extends JsonLikeKafkaMessageReceiver implements Callable<Integer> {

will generate autocompletion:

function _complete_campTools() {
...
  local cmds4=(receive-avro-from-kafka)
  local cmds5=(receive-avro-from-kafka)
...  
  if CompWordsContainsArray "${cmds5[@]}"; then _picocli_campTools_rafk; return $?; fi
  if CompWordsContainsArray "${cmds4[@]}"; then _picocli_campTools_receiveavrofromkafka; return $?; fi
...

_complete_campTools() is top level function. My interpretation is, that cmds4 and cmds5 are generated duplicated. Both subcomand autocomplete functions are equal, but we test presence of wrong word in COMP_WORDS array, meaning that we cannot ever call rafk alias related function. Fixing it to local cmds5=(rafk) fixes the issue and autocomplete works again.

Not sure if that's enough to find the issue, or whether some sub-standard coding on my part causes that. If you need smth more, I can help / share project.

[remkop]

Thank you for raising this! That does look like a bug.

Are you interested in providing a pull request for this?

[alfonz19]

Yes, I'd like to provide it, but it seems that I don't understand the project sufficiently not to create more issues, and I cannot even build master using maven, no idea why... I'd have to invest more time than I have available(hypocrite, I know).

The generating is in picocli.AutoComplete#generateFunctionCallsToArrContains, I'd guess that there is one CommandDescriptor in hierarchy param for each command and it's alias (in my case 2 descriptors for same command), but it's name will be always derived from command name and never from it's alias, so I'd guess error is somewhere in picocli.AutoComplete#createHierarchy. But I can't easily see it or debug the project. I apologize.

[remkop]

The project can be built with gradle:

gradle clean build

[alfonz19]

Sorry, I tried, but I give up. I'm apparently missing some information in several areas including even git (right after clone I have modified files from somewhere and I cannot get rid of them in any way /resetting/checkouting/staging/nothing Is it CRLF line ending normalization issue? Something else?). I don't have sufficient knowledge of gradle/your project to fix this issue; no idea how could I debug building of my project to debug autocomplete generation. I cannot do it in: clone—build—easily debug—fix way, and I cannot afford more. I'd like to help, but I spend like 90m and I'm still stuck just in preparation phase. I don't have more. Sorry.

[remkop]

No worries. I’ll take a look when I have some time to spend on picocli again.