Works around two bugs in the SVG export of FreeCAD (0.18) as Shaper Origin (Humboldt) rejects the file with

Unable to place design. Check that your file is formatted properly.

Probably related to this discussion at the FreeCAD forum.

Usage

Call the script from the terminal

python3 fixup_shaper_svg.py freecad_export.svg compatible_with_shaper.svg

To process an SVG and patch elements that cause Shaper Origin to reject the file. The following incorrect SVG constructs are corrected by the script:

Patched Bug 1

incorrect formats length attributes which separate a number and unit literal with a space, e.g. "0.35 px".

According to https://www.w3.org/TR/SVG/coords.html#Units, https://www.w3.org/TR/css-values/#absolute-lengths https://developer.mozilla.org/en-US/docs/Web/CSS/length#syntax this is incorrect as

there is no space between the unit literal and the number.

Patched Bug 2

invalid CSS style "fill-rule". This is not a CSS style property but an SVG attribute. https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/fill-rule For the time being, the property is simply removed.

Running Tests

Run the unit-tests via

python3 fixup_shaper_svg_tests.py