Pull request https://github.com/apache/cassandra/pull/1950/files is an attempt to move the boilerplate coding from the script files into a single maintainable file.
This change does 4 things: 1. Moves the standard boiler plate from the standard scripts into a single maintainable script to be sourced in the original scripts with minimal changes. 2. Creates a debug logging so that problem determination (as it CASSANDRA-17773 <https://issues.apache.org/jira/browse/CASSANDRA-17773>) is easier. 3. Has code to preserve environment variables when needed (c.f. nodetool script). 4. Provides a verification method that will verify that all standard environment variables are set. In practice this is a simple 2 line replacement for most boilerplate blocks. Examples of the simple case (sstableloader) and a more complex case (nodetool) are included in the current pull request. If there is consensus, I will update the other scripts in the bin directory to utilize the sourced boilerplate and request a full review of the pull request.
