pandoc-wrapper

Pandoc Wrapper for NodeJS.

Requires the pandoc executable to be installed. Normally this is in /usr/bin/pandoc. It can be specified in the environmental variable PANDOC_BINARY_PATH if necesary.

sudo apt-get install pandoc   # Ubuntu (most versions of Debian)
apk add --no-cache pandoc     # Alpine v3.17+

# install the package
npm i pandoc-wrapper

# alternatively, install it directly from source
npm i git+https://github.com/valexandersaulys/pandoc-wrapper

Examples of Usage

It's suggested you look at tests/ for examples.

pandoc-wrapper can be used in both async and sync flavors. It defaults to sync if not specified.

Sync

const PandocJS = require("pandoc-wrapper");

// convert a file on disk already and write out
const pandoc = new PandocJS({ runAsAsync: false });
pandoc.convert("/tmp/input.md", "/tmp/output.html", "html");

Note: writing to the filestream is not practically possible in Synchronous execution. This is because of how child processes in node work. You can run it anyway even if async is enabled but a warning will be raised

const PandocJS = require("pandoc-wrapper");

(async () => {
  const pandoc = new PandocJS({ runAsAsync: false });
  await pandoc.sendRawStream(
      "# header",
      "/tmp/output.html",
      "html"
    )
  // WARNING: you have this marked to only run sync but pushing input is always ASYNC
  // $ cat /tmp/output.html 
  // <h1 id="header">header</h1>
})();

Async

const PandocJS = require("pandoc-wrapper");

const pandoc = new PandocJS({ runAsAsync: true });

// convert from file on-disk
pandoc
  .convert("/tmp/input.md", "/tmp/output.html", "bbbb")
  .then(() => {
    // do things with your file, there is no return value
  })
  .catch((err) => {
    // some helpful, build-in exceptions
    if(err.name == "EXECUTABLE_NOT_FOUND")
      console.log("Executable for pandoc not found");
    else if(err.name == "INPUT_FILE_NOT_FOUND")    
      console.log("Could not find input file specified");
    else if(err.name == "INVALID_FILE_FORMAT")
      console.log("File Format specified (e.g. 'html') was not correct");
    else if(err.name == "STDERR_EXCEPTION")
      console.log("All other exceptions generated");
  })    

Testing

npm run test
npm run test:one -- tests/name.of.test.js

You can optionally run the tests in Docker.

bash run-tests-docker.sh

This is particularly helpful if you plan to use this in a container context.

Caveats

No support for Windows either now or in the future. This is because I don't own a Windows machine. I'll accept relevant pull requests around it somebody else is interested in that.

License

MIT