cqlsh: use libedit when readline isn't available, if possible
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Key: CASSANDRA-3597
URL: https://issues.apache.org/jira/browse/CASSANDRA-3597
Project: Cassandra
Issue Type: Improvement
Components: Tools
Affects Versions: 1.0.3
Environment: Cqlsh, run under a Mac OS X-bundled Python installation
(also possibly some types of BSD installation).
Reporter: paul cannon
Assignee: paul cannon
Priority: Minor
Cqlsh provides context-sensitive tab-completion functionality, but it's only
available when the readline library is available, and this is not the case
where readline's GPL license proves problematic.
[libedit|http://www.thrysoee.dk/editline/] is a common replacement, which would
be available to Mac OS X-bundled Python users, and the Python readline module
makes libedit almost a drop-in replacement.
If possible, fallback to libedit functionality when providing tab completion.
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