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extern crate netencode;
extern crate mustache;
use mustache::{Data};
use netencode::{T};
use std::collections::HashMap;
use std::os::unix::ffi::{OsStrExt};
use std::io::{Read};
fn arglib_netencode(env: Option<&std::ffi::OsStr>) -> Result<T, String> {
let env = match env {
None => std::ffi::OsStr::from_bytes("ARGLIB_NETENCODE".as_bytes()),
Some(a) => a
};
match std::env::var_os(env) {
None => Err(format!("could not read args, envvar {} not set", env.to_string_lossy())),
// TODO: good error handling for the different parser errors
Some(soup) => match netencode::parse::t_t(soup.as_bytes()) {
Ok((remainder, t)) => match remainder.is_empty() {
true => Ok(t),
false => Err(format!("there was some unparsed bytes remaining: {:?}", remainder))
},
Err(err) => Err(format!("parsing error: {:?}", err))
}
}
}
fn netencode_to_mustache_data_dwim(t: T) -> Data {
match t {
// TODO: good idea?
T::Unit => Data::Null,
T::N1(b) => Data::Bool(b),
T::N3(u) => Data::String(u.to_string()),
T::N6(u) => Data::String(u.to_string()),
T::N7(u) => Data::String(u.to_string()),
T::I3(i) => Data::String(i.to_string()),
T::I6(i) => Data::String(i.to_string()),
T::I7(i) => Data::String(i.to_string()),
T::Text(s) => Data::String(s),
T::Binary(b) => unimplemented!(),
T::Sum(tag) => unimplemented!(),
T::Record(xs) => Data::Map(
xs.into_iter()
.map(|(key, val)| (key, netencode_to_mustache_data_dwim(*val)))
.collect::<HashMap<_,_>>()
),
T::List(xs) => Data::Vec(
xs.into_iter()
.map(|x| netencode_to_mustache_data_dwim(x))
.collect::<Vec<_>>()
),
}
}
pub fn from_stdin() -> () {
let data = netencode_to_mustache_data_dwim(
arglib_netencode(None).unwrap()
);
let mut stdin = String::new();
std::io::stdin().read_to_string(&mut stdin).unwrap();
mustache::compile_str(&stdin)
.and_then(|templ| templ.render_data(
&mut std::io::stdout(),
&data
)).unwrap()
}
pub fn main() {
from_stdin()
}
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