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use std::fs;
use std::path::{Path, PathBuf};
use anyhow::{anyhow, bail, Context};
use same_file::is_same_file;
fn main() -> anyhow::Result<()> {
let args: Vec<_> = std::env::args().collect();
if args.len() < 2 || args.len() > 3 {
println!("usage: typst src.typ [out.pdf]");
return Ok(());
}
// Create a loader for fonts and files.
let mut loader = typst::loading::FsLoader::new();
loader.search_path("fonts");
loader.search_system();
// Resolve the canonical path because the compiler needs it for module
// loading.
let src_path = Path::new(&args[1]);
// Find out the file name to create the output file.
let name = src_path
.file_name()
.ok_or_else(|| anyhow!("source path is not a file"))?;
let dest_path = if args.len() <= 2 {
Path::new(name).with_extension("pdf")
} else {
PathBuf::from(&args[2])
};
// Ensure that the source file is not overwritten.
if is_same_file(src_path, &dest_path).unwrap_or(false) {
bail!("source and destination files are the same");
}
// Read the source.
let src = fs::read_to_string(&src_path)
.map_err(|_| anyhow!("failed to read source file"))?;
// Compile.
let mut cache = typst::cache::Cache::new(&loader);
let scope = typst::library::new();
let state = typst::exec::State::default();
let pass = typst::typeset(
&mut loader,
&mut cache,
Some(&src_path),
&src,
&scope,
state,
);
// Print diagnostics.
let map = typst::parse::LineMap::new(&src);
for diag in pass.diags {
let start = map.location(diag.span.start).unwrap();
let end = map.location(diag.span.end).unwrap();
println!(
"{}: {}:{}-{}: {}",
diag.level,
src_path.display(),
start,
end,
diag.message,
);
}
// Export the PDF.
let buffer = typst::export::pdf(&cache, &pass.output);
fs::write(&dest_path, buffer).context("failed to write PDF file")?;
Ok(())
}
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