move old files to a separate directory

old_curriculum/src/bin/generate_readme.rs

@@ -0,0 +1,49 @@
+// This script reads README-template.md and generates the playground links
+// from the Rust source files in the various directories.
+
+// To add a new exercise, add it to the appropriate place in README-template.md
+// and then make sure to recompile this script (because the template gets
+// included at compile time and then run it to generate a new version of
+// README.md.
+
+extern crate handlebars;
+extern crate prlink;
+#[macro_use]
+extern crate serde_json;
+
+use handlebars::{Handlebars, Helper, RenderContext, RenderError};
+
+use std::fs::File;
+use std::io::prelude::*;
+use std::path::PathBuf;
+
+fn main() {
+    let mut template_file = File::open("README-template.hbs").unwrap();
+    let mut template = String::new();
+    template_file.read_to_string(&mut template).unwrap();
+
+    let autogenerated_notice = "This file was autogenerated by the script in src/bin/generate_readme.rs.
+Please edit either the script or the template in README-template.md in
+order to make changes here rather than committing the changes directly.";
+
+    let mut generated_readme = File::create("README.md").unwrap();
+
+    let mut hbs = Handlebars::new();
+    hbs.register_helper("playground_link", Box::new(playground_link_helper));
+
+    write!(
+        generated_readme,
+        "{}",
+        hbs.render_template(
+            &template,
+            &json!({ "autogenerated_notice": autogenerated_notice }),
+        ).unwrap()
+    ).unwrap();
+}
+
+fn playground_link_helper(h: &Helper, _: &Handlebars, rc: &mut RenderContext) -> Result<(), RenderError> {
+    let filename = PathBuf::from(h.param(0).unwrap().value().as_str().unwrap());
+    let link = prlink::linkify_file(&filename);
+    rc.writer.write(link.into_bytes().as_ref())?;
+    Ok(())
+}