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use pandoc;
use std::path::PathBuf;
use structopt::StructOpt;
use subplot;
// Define the command line arguments.
#[derive(Debug, StructOpt)]
#[structopt(name = "docgen", about = "Subplot document generator.")]
struct Opt {
// One or more input filename.
#[structopt(parse(from_os_str))]
filenames: Vec<PathBuf>,
// Set output file name.
#[structopt(name = "FILE", long = "--output", short = "-o", parse(from_os_str))]
output: PathBuf,
}
fn main() -> subplot::Result<()> {
let opt = Opt::from_args();
let mut pandoc = pandoc::new();
// Tell Pandoc what the input files are.
for filename in opt.filenames {
pandoc.add_input(&filename);
}
// Tell Pandoc what the input file format is.
pandoc.set_input_format(
pandoc::InputFormat::Markdown,
vec![pandoc::MarkdownExtension::Citations],
);
// Add external Pandoc filters.
let citeproc = std::path::Path::new("pandoc-citeproc");
pandoc.add_option(pandoc::PandocOption::Filter(citeproc.to_path_buf()));
// This would be nicer if pandoc took a Pathbuf for output,
// instead of a String. Reported as
// <https://github.com/oli-obk/rust-pandoc/issues/23>
let output = format!("{}", opt.output.display());
pandoc.set_output(pandoc::OutputKind::File(output));
// Set options for Pandoc.
pandoc.add_option(pandoc::PandocOption::TableOfContents);
pandoc.add_option(pandoc::PandocOption::Standalone);
pandoc.add_option(pandoc::PandocOption::NumberSections);
// Run Pandoc to parse the inputs into an abstract syntax tree,
// then run our filter on that, then let Pandoc produce the output
// file from the AST.
pandoc.add_filter(|json| {
let mut doc = subplot::Document::from_json(&json).expect("error parsing JSON AST");
doc.typeset();
doc.ast().expect("error serializing into JSON AST")
});
pandoc.execute()?;
Ok(())
}
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