[jira] [Commented] (CLI-221) cli's with last option as list type values and have argument are not parsed correctly

["Duncan Jones (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CLI-221?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14482665#comment-14482665 ] 

Duncan Jones commented on CLI-221:
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The Javadocs do not make this sound optional. From {{OptionBuilder::withValueSeparator}}:

bq. The next Option created uses sep as a means to separate argument values

At the very least, the Javadocs should be updated to make it clear that whitespace will always remain a valid separator. We may also consider a new method that exclusively uses the supplied separator.

Personally I find the current behaviour non-intuitive and I'm struggling to imagine a use for it.

> cli's with last option as list type values and have argument are not parsed correctly
> -------------------------------------------------------------------------------------
>
>                 Key: CLI-221
>                 URL: https://issues.apache.org/jira/browse/CLI-221
>             Project: Commons CLI
>          Issue Type: Bug
>          Components: Parser
>    Affects Versions: 1.2
>            Reporter: Gagan Jain
>
> I have set the value separator for an option to be comma (',').
> Consider the following cli:
> cli definition : cmd1 -o1 <comma separated values> a1
> command name: 'cmd1'
> options: 'o1' accpets list of values separated by ','
> arguments: 'a1' single valued argument
> {code}cmd1 -o1 o1v1,o1v2,o1v3 a1v1{code}
> GnuParser parses this the cli with o1 having values {o1v1, o1v2, o1v3, a1v1} instead of {o1v1,o1v2,o1v3}
> Bug seems to be in org.apache.commons.cli.Parser's class processArgs method.
> {code:java}
>     public void processArgs(Option opt, ListIterator iter) throws ParseException
>     {
>         // loop until an option is found
>         while (iter.hasNext())
>         {
>             String str = (String) iter.next();
>             // found an Option, not an argument
>             if (getOptions().hasOption(str) && str.startsWith("-"))
>             {
>                 iter.previous();
>                 break;
>             }
>             // found a value
>             try
>             {
>                 opt.addValueForProcessing(Util.stripLeadingAndTrailingQuotes(str));
>             }
>             catch (RuntimeException exp)
>             {
>                 iter.previous();
>                 break;
>             }
>         }
>         if (opt.getValues() == null && !opt.hasOptionalArg())
>         {
>             throw new MissingArgumentException(opt);
>         }
>     }
> {code}
> In my opinion, if a value separator is defined for option, and is other than space (' '), loop should break immediately after one iteration.
> Correct me, if I am wrong in my understanding.



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