Jan Høydahl created SOLR-17359:
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             Summary: Make SolrCLI handle arg parsing of zk sub commands
                 Key: SOLR-17359
                 URL: https://issues.apache.org/jira/browse/SOLR-17359
             Project: Solr
          Issue Type: Sub-task
          Components: scripts and tools
            Reporter: Jan Høydahl


Both  bin/solr and bin/solr.cmd have lots of shell code to parse the zk sub 
commands, and to print the usage text. We have both a short zk uage text and 
the full one.
{code:java}
Usage: solr zk upconfig|downconfig -d <confdir> -n <configName> [-z zkHost] [-s 
solrUrl]"
       solr zk cp [-r] <src> <dest> [-z zkHost] [-s solrUrl]"
       solr zk rm [-r] <path> [-z zkHost] [-s solrUrl]"
       solr zk mv <src> <dest> [-z zkHost] [-s solrUrl]"
       solr zk ls [-r] <path> [-z zkHost] [-s solrUrl]"
       solr zk mkroot <path> [-z zkHost] [-s solrUrl]"
       solr zk linkconfig --conf-name <confname> -c <collection> [-z zkHost] 
[-s solrUrl]"
       solr zk updateacls <path> [-z zkHost] [-s solrUrl]" {code}
Extend SolrCLI and tools API to handle sub commands more natively so that doing 
{{solr zk -h}} shows a list of sub commands, while `solr zk cp -h` shows usage 
for that sub command.

I think commons-cli does not have native subcommand support like e.g. picocli, 
but it should be possible to implement..



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