Use Ructe (#327)

All the template are now compiled at compile-time with the `ructe` crate.

I preferred to use it instead of askama because it allows more complex Rust expressions, where askama only supports a small subset of expressions and doesn't allow them everywhere (for instance, `{{ macro!() | filter }}` would result in a parsing error).

The diff is quite huge, but there is normally no changes in functionality.

Fixes #161 and unblocks #110 and #273

plume-common/src/lib.rs

@@ -1,4 +1,4 @@
-#![feature(custom_attribute, iterator_flatten)]
+#![feature(custom_attribute)]
 
 extern crate activitypub;
 #[macro_use]
@@ -10,7 +10,6 @@ extern crate chrono;
 extern crate failure;
 #[macro_use]
 extern crate failure_derive;
-extern crate gettextrs;
 extern crate hex;
 extern crate heck;
 extern crate hyper;

plume-common/src/utils.rs

@@ -1,4 +1,3 @@
-use gettextrs::gettext;
 use heck::CamelCase;
 use openssl::rand::rand_bytes;
 use pulldown_cmark::{Event, Parser, Options, Tag, html};
@@ -23,8 +22,13 @@ pub fn make_actor_id(name: &str) -> String {
         .collect()
 }
 
+/**
+* Redirects to the login page with a given message.
+*
+* Note that the message should be translated before passed to this function.
+*/
 pub fn requires_login<T: Into<Uri<'static>>>(message: &str, url: T) -> Flash<Redirect> {
-    Flash::new(Redirect::to(format!("/login?m={}", gettext(message.to_string()))), "callback", url.into().to_string())
+    Flash::new(Redirect::to(format!("/login?m={}", message)), "callback", url.into().to_string())
 }
 
 #[derive(Debug)]