PIPELINE_HISTORY

Brandon Foster (brandonf)
Grant Foster (gfoster5)

To use, type "pipeline_history" in the shell.

This plugin displays the previously ran commands from the user.

There is a "history" plugin, which this plugin is different from.
This plugin prints each pipeline the user entered, as opposed to only the first command of each 
pipeline the user entered.

To run pipeline_history in your shell, enter the following command 
from the directory in which your "esh" and your "eshoutput.py" files are located:

    $ ./esh -p /web/courses/cs3214/spring2015/projects/student-plugins/brandonf_gfoster5/pipeline_history
   
To test the pipeline_history, enter the following command
from the directory in which your "esh" and your "eshoutput.py" files are located:
    $ /web/courses/cs3214/spring2015/projects/student-plugins/brandonf_gfoster5/pipeline_history/group000_pipelineHistory_test.py eshoutput.py
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Example usage: 

$ ./esh -p /web/courses/cs3214/spring2015/projects/student-plugins/brandonf_gfoster5/pipeline_history/
Loading /web/courses/cs3214/spring2015/projects/student-plugins/brandonf_gfoster5/pipeline_history//pipeline_history.so ...done.
Plugin 'pipeline_history' initialized...
esh> echo hi
hi
esh> echo hi | cat | rev | wc
      1       1       3
esh> pipeline_history
1 echo hi
2 echo hi | cat | rev | wc
3 pipeline_history