Synsh / About

Synsh ( automatically creates shell pipelines from example inputs and outputs.


Suppose we want to find a pipeline to transform the following comma-separated input:


to the following space-separated output, in which each line has been sorted by the numeric value, and the number comes first:

1 Margaret
2 Arthur
3 Octavia

First, we enter the input into the "input" text box:

Next, we enter the desired output into the "output" text box. Suppose that, to start with, we have only entered the first line of the output so far. Synsh searches for a pipeline mapping the input to the output as we type, so it will find a pipeline that maps our complete input to our partially-entered output:

Note that, along with the pipeline itself, Synsh outputs a comment describing what the pipeline does.

Note also that Synsh displays two buttons above the pipeline:

  1. The link button: pressing this button gives you a URL to use to share the current page, including the input, output, and the pipeline that Synsh found.

  2. The copy button: Pressing this button copies the pipeline to the clipboard.

Once we've finished entering the full output, Synsh finds and displays the pipeline we want:

Keeping Up To Date

To keep track of updates to Synsh, see the Synsh blog.


Please send all feedback to Pat Rondon: