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1. Create a directory for your project 

   Code Block
   language bash
   $ mkdir workflow $ cd workflow/

   
   

2. Initialize the project directory as a Git repository

   Code Block
   language bash
   $ git init

   
   

3. Follow the directions in Setting Up a Git Pre-Commit Hook to Parse KRL to set up the KRL parser and ensure that KRL files are parsed before they are committed. 

4. Create a KRL ruleset as a file in the repository using your favorite editor. There may be a KRL plugin for your editor. 

5. Add the file to the repository and commit it. 

   Code Block
   language bash
   $ git add hello_world.krl $ git commit -a -m "initial commit" [master (root-commit) 4a2f95c] initial commit 1 file changed, 34 insertions(+) create mode 100644 hello_world.krl

   With the pre-commit hook in place, you're assured that there are no parse errors in your ruleset if it commits. 

6. install the ruleset in your pico by navigating to the Rulesets page in the pico engine interface and putting it's full URL in the box labeled "Install ruleset from URL:" and clicking the button. We are using the file: URL scheme to load the ruleset from the filesystem directly into the engine rather than relying on an external server. The file URL is the schema file:// prepended to the full pathname of the file (yes, there are three slashes): 
   

   file:///Users/pjw/prog/picolabs/pico_lessons/workflow/hello_world.krl

   

7. You'll now see the ruleset listed in the installed rulesets in the pico. If you click on the "Engine Rulesets" link, you'll navigate to a page that shows the rulesets registered with the engine.

   
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Notes:

1. If you install a ruleset in a pico it also registers it with the engine. You can then install the same ruleset in another pico without re-registering it. You only need to register a ruleset once. 
2. Rulesets must be flushed whenever they change to force the engine to re-compile the ruleset and incorporate the changes. 
3. The ruleset name (the string following the keyword ruleset in the code) is used as the ruleset identifier (RID) by the engine.