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From "Jim Hester (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-10998) Bash tab completion support for newer versions of hadoop
Date Fri, 22 Aug 2014 13:28:11 GMT
Jim Hester created HADOOP-10998:

             Summary: Bash tab completion support for newer versions of hadoop
                 Key: HADOOP-10998
                 URL: https://issues.apache.org/jira/browse/HADOOP-10998
             Project: Hadoop Common
          Issue Type: Improvement
          Components: scripts
         Environment: Hadoop 2.0.0-cdh4.2.1
            Reporter: Jim Hester
            Priority: Trivial
         Attachments: HADOOP-10998.patch

The included version of bash completion has not been updated in almost two years and does
not work correctly with more recent versions of Hadoop.

The command substitutions in the script were using backticks, which were interpolating variables
before they were executed and breaking the script.  In particular the awk commands were breaking
due to this interpolation.

The attached patch changes the backticks to {{$(command)}} style for command substitution
and updates the script to work properly with newer versions of hadoop.

I tested the script using {{zsh 5.0.5}}, {{zsh 4.3.10]}, {{bash-4.1.2}} and {{bash-3.2}}.
 Hadoop versions tested were cloudera version {{2.0.0-cdh4.2.1}} and briefly Apache {{2.5.0}}.

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