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# Petri
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A directional shell
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# Syntax
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The syntax of petri is a bit different than normal shells because it uses ASCII art to define running graphs
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```
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#!/usr/bin/env petri
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\(diff @ @)
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^ ^
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\(ls /dev) -> replace_x --+-> replace_y --x-+
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+-> replace_z --+
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---
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replace_x: sed 's:x:y:g'
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replace_y: sed 's:y:z:g'
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replace_z: sed 's:z:x:g'
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```
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This would be the equivalent of the bash file:
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```
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ls /dev | sed 's:x:y:g' > /tmp/temp_file
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diff <(sed 's:z:x:g' < /tmp/temp_file) <(sed 's:y:z:g' < /tmp/temp_file)
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```
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#### Why 'petri'
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Originally I wanted to call it `dish` but I found that too generic, and since dish is from time to time preceded with petri, I chose that.
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