Turn the the message types into an auto-generated build script

Cargo.nix

@@ -8735,6 +8735,14 @@ rec {
             name = "cairo-rs";
             packageId = "cairo-rs";
           }
+          {
+            name = "fluent";
+            packageId = "fluent";
+          }
+          {
+            name = "fluent-ergonomics";
+            packageId = "fluent-ergonomics";
+          }
           {
             name = "gio";
             packageId = "gio";
@@ -8867,6 +8875,10 @@ rec {
             name = "icu_provider";
             packageId = "icu_provider";
           }
+          {
+            name = "intl-memoizer";
+            packageId = "intl-memoizer";
+          }
           {
             name = "serde";
             packageId = "serde 1.0.193";
@@ -8880,6 +8892,10 @@ rec {
             name = "sys-locale";
             packageId = "sys-locale";
           }
+          {
+            name = "thiserror";
+            packageId = "thiserror";
+          }
           {
             name = "unic-langid";
             packageId = "unic-langid";

flake.nix

@@ -17,6 +17,21 @@
         let
           pkgs = import nixpkgs { system = "x86_64-linux"; };
           pkgs-unstable = import unstable { system = "x86_64-linux"; };
+
+          cargo_nix = pkgs.callPackage ./Cargo.nix {
+            nixpkgs = pkgs;
+          };
+
+          l10n-codegen-rust = pkgs.stdenv.mkDerivation {
+            name = "l10n-codegen-rust";
+            src = ./.;
+
+            installPhase = ''
+              mkdir -p $out/bin
+              cp ${cargo_nix.workspaceMembers.l10n.build}/bin/codegen-rust $out/bin/l10n-codegen-rust
+            '';
+          };
+
         in
         pkgs.mkShell {
           name = "ld-tools-devshell";
@@ -45,6 +60,8 @@
             pkgs.udev
             pkgs.wasm-pack
             typeshare.packages."x86_64-linux".default
+
+            l10n-codegen-rust
           ];
           LIBCLANG_PATH="${pkgs.llvmPackages.libclang.lib}/lib";
           ENV = "dev";
@@ -86,17 +103,6 @@
           file-service = cargo_nix.workspaceMembers.file-service.build;
           fitnesstrax = cargo_nix.workspaceMembers.fitnesstrax.build;
           kifu-gtk = cargo_nix.workspaceMembers.kifu-gtk.build;
-          l10n = cargo_nix.workspaceMembers.l10n.build;
-          l10n-codegen-rust = pkgs.stdenv.mkDerivation {
-            name = "l10n-codegen-rust";
-            src = ./.;
-            buildInputs = [ l10n ];
-
-            installPhase = ''
-              mkdir -p $out/bin
-              cp ${l10n}/bin/codegen-rust $out/bin/l10n-codegen-rust
-            '';
-          };
           xdg-test = cargo_nix.workspaceMembers.xdg-test.build;
 
           all = pkgs.symlinkJoin {
@@ -107,8 +113,6 @@
                 file-service
                 fitnesstrax
                 # kifu-gtk
-                l10n
-                l10n-codegen-rust
                 xdg-test
             ];
           };

kifu/gtk/build.rs

@@ -1,7 +1,29 @@
+use std::{path::PathBuf, env, process, fs::File, io::Write};
+
+fn generate_message_types(dest: &PathBuf) {
+    println!("message types");
+    let output: Vec<u8> = process::Command::new("l10n-codegen-rust")
+        .arg("messages/en.yaml")
+        .output()
+        .unwrap()
+        .stdout;
+
+    let mut file = File::create(dest).unwrap();
+    file.write(&output).unwrap();
+}
+
 fn main() {
     glib_build_tools::compile_resources(
         &["resources"],
         "gresources.xml",
         "com.luminescent-dreams.kifu-gtk.gresource",
     );
+
+    // println!("OUT_DIR={}", env::var("OUT_DIR").unwrap());
+    let mut message_path = PathBuf::from(env::var("OUT_DIR").unwrap());
+    message_path.push("messages.rs");
+
+    generate_message_types(&message_path);
+
+    println!("cargo:rustc-env=KIFU_GTK_MESSAGES={}", message_path.to_string_lossy());
 }

kifu/gtk/resources/eo.ftl

@@ -1,7 +1,7 @@
 nothing-here = Nenio estas ĉi tie
 hello = Saluton, ${name}
 welcome = Bonvenon
-games-in-database = {count ->
+games-in-database = {$count ->
     [one] Estas unu ludon en la datumbazo.
-    [other] Estas {count} ludojn en la datumbazo.
+    *[other] Estas ${count} ludojn en la datumbazo.
 }

kifu/gtk/src/lib.rs

@@ -1,4 +1,6 @@
-mod messages;
+mod messages {
+    include!(env!("KIFU_GTK_MESSAGES"));
+}
 
 pub mod ui;
 

kifu/gtk/src/messages.rs

@@ -1,58 +0,0 @@
-// This file was autogenerated from l10n-codegen-rust. Edits will be lost
-// on next generation.
-use l10n::Message;
-use fluent::FluentArgs;
-
-pub struct Hello {
-    name: String,
-}
-
-impl Message for Hello {
-    fn msgid(&self) -> &str {
-        "hello"
-    }
-
-    fn args(&self) -> Option<FluentArgs> {
-        let mut args = FluentArgs::new();
-        args.set("name", self.name.clone());
-        Some(args)
-    }
-}
-
-pub struct Welcome; 
-impl Message for Welcome {
-    fn msgid(&self) -> &str {
-        "welcome"
-    }
-
-    fn args(&self) -> Option<FluentArgs> {
-        None
-    }
-}
-
-pub struct GamesInDatabase {
-    count: usize,
-}
-
-impl Message for GamesInDatabase {
-    fn msgid(&self) -> &str {
-        "games-in-database"
-    }
-
-    fn args(&self) -> Option<FluentArgs> {
-        let mut args = FluentArgs::new();
-        args.set("count", self.count.clone());
-        Some(args)
-    }
-}
-
-pub struct NothingHere; 
-impl Message for NothingHere {
-    fn msgid(&self) -> &str {
-        "nothing-here"
-    }
-
-    fn args(&self) -> Option<FluentArgs> {
-        None
-    }
-}

kifu/gtk/src/ui/mod.rs

@@ -2,7 +2,7 @@ use adw::prelude::*;
 use gio::resources_lookup_data;
 use glib::IsA;
 use gtk::STYLE_PROVIDER_PRIORITY_USER;
-use l10n::L10N;
+use l10n::{L10N, NonEmptyList};
 use std::path::PathBuf;
 use crate::messages;
 
@@ -78,7 +78,8 @@ impl AppWindow {
         header.pack_end(&hamburger);
 
         let content = adw::Bin::builder().css_classes(vec!["content"]).build();
-        let l10n = L10N::new(PathBuf::from("resources"));
+        let mut l10n = L10N::new(PathBuf::from("resources"));
+        l10n.set_locales(NonEmptyList::from_iter(vec!["en-US", "eo"]).unwrap());
         content.set_child(Some(
             &adw::StatusPage::builder().title(l10n.tr(messages::NothingHere)).build(),
         ));

l10n/src/lib.rs

@@ -26,7 +26,9 @@ impl<A> NonEmptyList<A> {
         Self(vec![elem])
     }
 
-    fn from_iter(iter: impl IntoIterator<Item = A>) -> Result<NonEmptyList<A>, NonEmptyListError> {
+    pub fn from_iter(
+        iter: impl IntoIterator<Item = A>,
+    ) -> Result<NonEmptyList<A>, NonEmptyListError> {
         let lst = iter.into_iter().collect::<Vec<A>>();
         if lst.len() > 0 {
             Ok(NonEmptyList(lst))
@@ -38,6 +40,10 @@ impl<A> NonEmptyList<A> {
     fn first(&self) -> &A {
         &self.0[0]
     }
+
+    fn iter<'a>(&'a self) -> impl Iterator<Item = &'a A> {
+        self.0.iter()
+    }
 }
 
 impl<A> Deref for NonEmptyList<A> {
@@ -68,7 +74,7 @@ pub enum FileLoadError {
     FileNotFound,
 
     #[error("The Fluent file is malformed")]
-    FluentParseError,
+    FluentParseError(String),
 
     #[error("An unknown IO error was found")]
     IOError(std::io::Error),
@@ -156,7 +162,13 @@ impl L10N {
                 self.message_bundles.push(bundle);
                 Ok(())
             }
-            Err((_, _error)) => Err(FileLoadError::FluentParseError),
+            Err((_, errors)) => Err(FileLoadError::FluentParseError(
+                errors
+                    .into_iter()
+                    .map(|err| err.to_string())
+                    .collect::<Vec<String>>()
+                    .join("\n"),
+            )),
         }
     }
 
@@ -178,7 +190,13 @@ impl L10N {
             .iter()
             .map(|locale| Locale::try_from_bytes(locale.as_bytes()))
             .collect::<Result<Vec<Locale>, icu::locid::Error>>()?;
+
+        for locale in locales.iter() {
+            self.load_messages_from_file(locale.to_string()).unwrap();
+        }
+
         self.locales = NonEmptyList(locales);
+
         Ok(())
     }
 
@@ -200,15 +218,21 @@ impl L10N {
     // }
 
     pub fn tr(&self, message: impl Message) -> String {
-        println!("message: {}", message.msgid());
-        let msg = self.message_bundles[0]
+        for bundle in self.message_bundles.iter().rev() {
+            let msg = bundle
                 .get_message(message.msgid())
-            .and_then(|msg| msg.value())
-            .unwrap();
+                .and_then(|msg| msg.value());
+            match msg {
+                Some(msg) => {
                     let mut errors = vec![];
-        self.message_bundles[0]
+                    return self.message_bundles[0]
                         .format_pattern(msg, message.args().as_ref(), &mut errors)
-            .to_string()
+                        .to_string();
+                }
+                None => continue,
+            }
+        }
+        unreachable!("The message {} is missing", message.msgid());
     }
 
     pub fn format_date_time_utc(