vendor/handlebars/src/cli.rs

   1 use std::env;
   2 use std::fs;
   3 use std::process;
   4 use std::str::FromStr;
   5
   6 use serde_json::value::Value as Json;
   7
   8 use handlebars::Handlebars;
   9
  10 fn usage() -> ! {
  11     eprintln!("Usage: handlebars-cli template.hbs '{{\"json\": \"data\"}}'");
  12     process::exit(1);
  13 }
  14
  15 fn parse_json(text: &str) -> Json {
  16     let text = if text.starts_with('@') {
  17         fs::read_to_string(&text[1..]).unwrap()
  18     } else {
  19         text.to_owned()
  20     };
  21     match Json::from_str(&text) {
  22         Ok(json) => json,
  23         Err(_) => usage(),
  24     }
  25 }
  26
  27 fn main() {
  28     let mut args = env::args();
  29     args.next(); // skip own filename
  30     let (filename, json) = match (args.next(), args.next()) {
  31         (Some(filename), Some(json)) => (filename, json),
  32         _ => usage(),
  33     };
  34     let data = parse_json(&json);
  35
  36     let mut handlebars = Handlebars::new();
  37
  38     handlebars
  39         .register_template_file(&filename, &filename)
  40         .ok()
  41         .unwrap();
  42     match handlebars.render(&filename, &data) {
  43         Ok(data) => {
  44             println!("{}", data);
  45         }
  46         Err(e) => {
  47             println!("Error rendering {}: {}", filename, e);
  48             process::exit(2);
  49         }
  50     }
  51 }