Merge pull request #92 from tailhook/example-cli

Add example to render arbitrary template from arbitrary json

examples/render-cli.rs

@@ -0,0 +1,68 @@
+#![cfg_attr(all(feature="serde_type"), feature(custom_derive, plugin))]
+#![cfg_attr(all(feature="serde_type"), plugin(serde_macros))]
+extern crate env_logger;
+#[cfg(all(feature = "rustc_ser_type", not(feature = "serde_type")))]
+extern crate rustc_serialize;
+extern crate handlebars;
+
+#[cfg(feature = "serde_type")]
+extern crate serde;
+#[cfg(feature = "serde_type")]
+extern crate serde_json;
+
+use std::io::{self, Write};
+use std::process;
+use std::env;
+
+use rustc_serialize::json::Json;
+
+use handlebars::Handlebars;
+
+
+fn usage() -> ! {
+    writeln!(&mut io::stderr(), "{}",
+        r#"Usage: ./render-cli template.hbs '{"json": "data"}'"#).ok();
+    process::exit(1);
+}
+
+#[cfg(all(feature = "rustc_ser_type", not(feature = "serde_type")))]
+fn parse_json(text: &str) -> Json {
+    match Json::from_str(text) {
+        Ok(json) => json,
+        Err(_) => usage(),
+    }
+}
+#[cfg(feature = "serde_type")]
+fn parse_json(text: &str) -> Value {
+    match serde_json::from_str(text) {
+        Ok(json) => json,
+        Err(_) => usage(),
+    }
+}
+
+fn main() {
+    env_logger::init().unwrap();
+
+    let mut args = env::args();
+    args.next(); // skip own filename
+    let (filename, json) = match (args.next(), args.next()) {
+        (Some(filename), Some(json)) => (filename, json),
+        _ => usage(),
+    };
+    let data = parse_json(&json);
+
+    let mut handlebars = Handlebars::new();
+
+    handlebars.register_template_file(&filename, &filename)
+              .ok()
+              .unwrap();
+    match handlebars.render(&filename, &data) {
+        Ok(data) => {
+            println!("{}", data);
+        }
+        Err(e) => {
+            println!("Error rendering {}: {}", filename, e);
+            process::exit(2);
+        }
+    }
+}

examples/simple.hbs

@@ -0,0 +1 @@
+Data: {{ . }}