Writing a Haskell package and issues replicating --standalone

[patrickaldis]

I'm writing a Haskell package and currently trying to produce the same results in Haskell as running with --standalone in the command line.

I'm trying to produce mathjax rendered markdown. My current Haskell code is:

testCase = do
  let mdsrc = "$\\forall X . \\forall Y . \\left( X.XCoord =Y.XCoord \\right)\\$"
  htmlOut <- runIO $ readMarkdown rOpts (pack mdsrc) >>= writeHtml5String wOpts
  case htmlOut of
    Right f -> writeFile "out.html" $ unpack f
    Left e -> print e

wOpts :: WriterOptions
wOpts = def {writerHTMLMathMethod = MathJax defaultMathJaxURL}

rOpts :: ReaderOptions
rOpts = def {readerExtensions = pandocExtensions, readerStandalone = True}

Which doesn't seem to produce the header. Is the idea that readerStandalone replicates the functionality of --standalone? It's value doesn't seem to have an effect on the html output

running pandoc -i <file> -o <output>.html --standalone --mathjax produces the desired result

[jgm]

You need to set writerTemplate to a Just value to get standalone output.

[patrickaldis]

Oh right thanks so much. That works great now.

[jgm]

readerStandalone only has an effect in one or two readers, e.g. RST where in a standalone document the initial heading becomes the title metadata. Mostly what --standalone does is to set writerTemplate to the default template for the format used.