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I'm looking for a professional tool for OSX that using a DSL will allow me to write code for a workflow and will generate a flowchart from the code. Something similar to this but not in-browser and providing a little more functionality (like compressing the chart).

This tool should:

  1. Allow input of "code" as text that will influence the generation of the flow chart
  2. Provide the ability to draw-to-file a flowchart graph from the code input
  3. Provide manual modifications to the flowchart such as moving boxes to different positions, changing box size, changing box shape, etc.
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If you are familiar with LaTeX, then I recommend using the TikZ package in a standalone document class. The manual describes the syntax in detail, and you can find flowchart examples here.

Pros (matching your criteria):

  1. Allows input of code using any text editor and can be built using your local LaTeX interpretor, or even an online tool
  2. The resulting diagram is saved in PostScript/PDF format, which can be converted to high density graphics using ImageMagick convert -density 600x600 flowchart.pdf -quality 100 flowchart.png. This can by typed later in the command line, or added to the document class to output the image in a single step \documentclass[convert={density=600,outext=.png}]{standalone}.
  3. Provides control over the size and shape of the nodes using \tikzstyle{} and the ability to fine tune positions by the millimeter (or your preferred unit, pt for example). You can also save your own style definitions in a separate file and \input{} it into several documents, instead of copying or typing them all over again.

Cons:

  1. Might take time to learn if you are new to LaTeX
  • I'm afraid to use LaTeX because there's too much control given to the user. For example, I don't want to worry about millimeter node positions, I'd rather have that taken care of for me. Do you know if TikZ can perform its own optimal node spacing? – fifosine Aug 17 '14 at 14:58
  • @fifosine In the linked example, they have used a global node distance with auto mode (\begin{tikzpicture}[node distance = 2cm, auto]). This means that you won't have to worry about individual node spacing except in special cases. – Tymric Aug 18 '14 at 9:17

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