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https://issues.apache.org/jira/browse/CASSANDRA-14494?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Patrick Bannister reassigned CASSANDRA-14494:
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Assignee: Patrick Bannister
> Investigate possibility of a cqlsh terminfo
> -------------------------------------------
>
> Key: CASSANDRA-14494
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14494
> Project: Cassandra
> Issue Type: Sub-task
> Components: Legacy/Tools
> Environment: This behavior has been observed in xterm on CentOS 7.5
> platforms. The test_cqlsh_output.py unit tests
> (pylib/cqlshlib/test/test_cqlsh_output.py) are a good place to see it in
> action.
> Reporter: Patrick Bannister
> Assignee: Patrick Bannister
> Priority: Normal
> Labels: Python, cqlsh, test
> Fix For: 4.x
>
>
> Summary: investigate whether we could use a cqlsh-specific terminfo file to
> prevent use of the set-meta-mode escape sequence in xterm without breaking
> colors. If it works, see if we can install it in an appropriate place using
> Python distutils. If yes to both, generate a cqlsh terminfo file and work it
> into the install process.
> Long detailed explanation:
> In some more recent environments, in Python REPL applications that use the
> readline module, the set meta mode escape sequence is output before each
> prompt. This escape sequence has caused problems for some applications, and
> in our case, some of our cqlsh unit tests
> (pylib/cqlshlib/test/test_cqlsh_output.py) choke on this output because of
> the way our tests are designed to detect the cqlsh prompt. This behavior was
> observed on a CentOS 7.5 platform.
> The set-meta-mode escape sequence normally appears as "[?1034h" in output;
> it's normally defined as the bytes 1b 5b 3f 31 30 33 34 68. The exact value
> of the escape sequence is configurable and may be found on a GNU/Linux
> platform by running the command:
> {code:java}
> tput smm | hexdump{code}
> If this command gives no output, then the set meta mode sequence is not
> defined on this platform for the terminal in use. Refer to the xterm and
> terminfo man pages for more information on this sequence.
> There are easier ways to solve this problem for the sake of the unit test,
> but if time allows, I'd like to look into this to achieve a more consistent
> output behavior for cqlsh on GNU/Linux platforms.
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