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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-3375) Move away from jruby; build our shell elsewise either on another foundation or build up our own
Date Mon, 20 Dec 2010 19:11:03 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3375?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12973305#action_12973305

Andrew Purtell commented on HBASE-3375:

I've built many domain specific languages over the years, using bison and flex. I have not
used ANTLR before but looked at some of the grammars and it looks reasonable. It looks like
you can guard rule evaluation with arbitrary predicates (Java code), which is interesting,
and I've only scratched the surface. This thing clearly lets you do complex wizard level stuff,
and I share Ryan's feelings about the trouble with that. If we were to go this route, we need
to be aggressive about simplicity. 

> Move away from jruby; build our shell elsewise either on another foundation or build
up our own
> -----------------------------------------------------------------------------------------------
>                 Key: HBASE-3375
>                 URL: https://issues.apache.org/jira/browse/HBASE-3375
>             Project: HBase
>          Issue Type: Task
>          Components: shell
>            Reporter: stack
>             Fix For: 0.92.0
> JRuby has been sullied; its been shipping *GPL jars with a while now.  A hack up to remove
these jars is being done elsewhere (HBASE-3374).  This issue is about casting our shell anew
atop a foundation that is other than JRuby or writing a shell of our own from scratch.
> JRuby has gotten us this far.  It provides a shell and it also was used scripting HBase.
 It would be nice if we could get scripting and shell in the redo.
> Apart from the licensing issue above and that the fix will be reverting our JRuby to
a version that is no longer supported and that is old, other reasons to move off JRuby are
that while its nice having ruby to hand when scripting, the JRuby complete jar is 10 or more
MB in size.  Its bloated at least from our small shell perspective.

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