55 lines
1.9 KiB
Rust
55 lines
1.9 KiB
Rust
|
// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
|
||
|
|
// file at the top-level directory of this distribution and at
|
||
|
|
// http://rust-lang.org/COPYRIGHT.
|
||
|
|
//
|
||
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
||
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
||
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
||
|
|
// option. This file may not be copied, modified, or distributed
|
||
|
|
// except according to those terms.
|
||
|
|
|
||
|
|
use std::fmt;
|
||
|
|
use std::rt::io::Reader;
|
||
|
|
use std::rt::io::pipe::PipeStream;
|
||
|
|
use std::rt::io::process::{ProcessConfig, Process, CreatePipe};
|
||
|
|
use std::rt::io;
|
||
|
|
|
||
|
|
pub struct Markdown<'self>(&'self str);
|
||
|
|
|
||
|
|
impl<'self> fmt::Default for Markdown<'self> {
|
||
|
|
fn fmt(md: &Markdown<'self>, fmt: &mut fmt::Formatter) {
|
||
|
|
if md.len() == 0 { return; }
|
||
|
|
|
||
|
|
// Create the pandoc process
|
||
|
|
do io::io_error::cond.trap(|err| {
|
||
|
|
fail2!("Error executing `pandoc`: {}", err.desc);
|
||
|
|
}).inside {
|
||
|
|
let io = ~[CreatePipe(PipeStream::new().unwrap(), true, false),
|
||
|
|
CreatePipe(PipeStream::new().unwrap(), false, true)];
|
||
|
|
let args = ProcessConfig {
|
||
|
|
program: "pandoc",
|
||
|
|
args: [],
|
||
|
|
env: None,
|
||
|
|
cwd: None,
|
||
|
|
io: io,
|
||
|
|
};
|
||
|
|
let mut p = Process::new(args).expect("couldn't fork for pandoc");
|
||
|
|
|
||
|
|
// Write the markdown to stdin and close it.
|
||
|
|
p.io[0].get_mut_ref().write(md.as_bytes());
|
||
|
|
p.io[0] = None;
|
||
|
|
|
||
|
|
// Ferry the output from pandoc over to the destination buffer.
|
||
|
|
let mut buf = [0, ..1024];
|
||
|
|
loop {
|
||
|
|
match p.io[1].get_mut_ref().read(buf) {
|
||
|
|
None | Some(0) => { break }
|
||
|
|
Some(n) => {
|
||
|
|
fmt.buf.write(buf.slice_to(n));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|