Command line stdin conversion

[yhql]

I would like to make a pandoc filter that does basically what spongedown does with ascii drawings. But I can't find how to properly pass a multiline string to svgbob through the command line. How is this done ?

On Windows, I have tried things like : echo "+--+\n| |\n+--+" | svgbob but the \n are kept as they are, and trying to pass the raw string from python actually ends the command in the middle of the string, effectively yielding an echo of the first line of the drawing.

[ivanceras]

Make sure you installed svgbob_cli via cargo install -f svgbob_cli. Invoke the command with svgbob Trying out your example:

$> echo "+--+\n| |\n+--+" | svgbob
<svg class="bob" font-family="arial" font-size="14" height="16" width="120" xmlns="http://www.w3.org/2000/svg">
<defs>
<marker id="triangle" markerHeight="10" markerUnits="strokeWidth" markerWidth="10" orient="auto" refX="15" refY="10" viewBox="0 0 50 20">
<path d="M 0 0 L 30 10 L 0 20 z"/>
</marker>
</defs>
<style>

    line, path {
      stroke: black;
      stroke-width: 2;
      stroke-opacity: 1;
      fill-opacity: 1;
      stroke-linecap: round;
      stroke-linejoin: miter;
    }
    circle {
      stroke: black;
      stroke-width: 2;
      stroke-opacity: 1;
      fill-opacity: 1;
      stroke-linecap: round;
      stroke-linejoin: miter;
    }
    circle.solid {
      fill:black;
    }
    circle.open {
      fill:transparent;
    }
    tspan.head{
        fill: none;
        stroke: none;
    }

</style>
<path d=" M 4 8 L 8 8 L 16 8 M 8 8 L 16 8 L 24 8 M 16 8 L 24 8 M 28 8 L 24 8 M 40 16 L 32 0 L 40 16 M 68 0 L 68 16 M 68 0 L 68 16 M 80 16 L 72 0 L 80 16 M 92 8 L 96 8 L 104 8 M 96 8 L 104 8 L 112 8 M 104 8 L 112 8 M 116 8 L 112 8" fill="none"/>
<path d="" fill="none" stroke-dasharray="3 3"/>
<text x="41" y="12">
n|
</text>
<text x="81" y="12">
n
</text>
</svg>

[yhql]

Thanks for looking into that. I also get some result with the example you tested, but here is what the svg you posted looks like :

(in the svg you can also see that the \n are actually written as <text>n</text>) When using an external file (with actual newline characters) :

I get something slightly different with the same command line, so I will perform the installation like you said, but I think the newline character will still be handled the same way :

[ivanceras]

Hi, it looks like a huge bug, probably with the added " as escaping character to be not interpreted as graphics. I've to look at this further.

[ivanceras]

@yhql it looks like this is not an issue with svgbob at all, but echo is sending literal "\n". That needs to be an actual line. Try putting -e instead with echo -e "+--+\n| |\n+--+" | svgbob. Alternatively you can also try printf "+--+\n| |\n+--+" | svgbob as stated here https://stackoverflow.com/questions/8467424/echo-newline-in-bash-prints-literal-n

[yhql]

Thanks for the info. Sadly as I'm on windows the echo command does not have any special flags that would help. I did try the following trick : echo "+--+" & echo "| |" & echo "+--+" | svgbob which almost does the job : the drawing is correct but there seems to be no way of getting rid of the " characters in the result.

[yhql]

If you're ok with it I could try to make svgbob accept strings as first arguments so that it handles the \n and others by itself, rather than let the terminal deal with it (because I don't see any way around on Windows).