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https://issues.apache.org/jira/browse/HADOOP-12249?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14648369#comment-14648369
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Allen Wittenauer commented on HADOOP-12249:
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bq. Is there a compatibility reason we need MYNAME to exist rather than e.g.
using BASH_SOURCE directly?
The $\{BASH_SOURCE-$0\} "math" is needed in a variety of places on a *per
executable* basis. One of the big ways it is used is to determine where the
libexec directory is located at if the user doesn't have any env vars set. So
it's shoved in a variable for convenience. In older scripts, it's generally
used as "$this"
> pull argument parsing into a function
> -------------------------------------
>
> Key: HADOOP-12249
> URL: https://issues.apache.org/jira/browse/HADOOP-12249
> Project: Hadoop Common
> Issue Type: Improvement
> Components: scripts
> Affects Versions: 3.0.0
> Reporter: Allen Wittenauer
> Assignee: Allen Wittenauer
> Labels: scripts, shell
> Attachments: HADOOP-12249.00.patch, HADOOP-12294.01.patch
>
>
> In order to enable significantly better unit testing as well as enhanced
> functionality, large portions of *-config.sh should be pulled into functions.
> See first comment for more.
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