Crates.io | i18n-embed-fl |
lib.rs | i18n-embed-fl |
version | 0.9.2 |
source | src |
created_at | 2020-08-27 15:34:19.974401 |
updated_at | 2024-10-21 02:41:23.535008 |
description | Macro to perform compile time checks when using the i18n-embed crate and the fluent localization system |
homepage | |
repository | |
max_upload_size | |
id | 281504 |
size | 43,772 |
This crate provides a macro to perform compile time checks when using the i18n-embed crate and the fluent localization system.
See docs, and i18n-embed for more information.
Set up a minimal i18n.toml
in your crate root to use with cargo-i18n
(see cargo i18n for more information on the configuration file format):
# (Required) The language identifier of the language used in the
# source code for gettext system, and the primary fallback language
# (for which all strings must be present) when using the fluent
# system.
fallback_language = "en-GB"
# Use the fluent localization system.
[fluent]
# (Required) The path to the assets directory.
# The paths inside the assets directory should be structured like so:
# `assets_dir/{language}/{domain}.ftl`
assets_dir = "i18n"
Create a fluent localization file for the en-GB
language in i18n/en-GB/{domain}.ftl
, where domain
is the rust path of your crate (_
instead of -
):
hello-arg = Hello {$name}!
Simple set up of the FluentLanguageLoader
, and obtaining a message formatted with an argument:
use i18n_embed::{
fluent::{fluent_language_loader, FluentLanguageLoader},
LanguageLoader,
};
use i18n_embed_fl::fl;
use rust_embed::RustEmbed;
#[derive(RustEmbed)]
#[folder = "i18n/"]
struct Localizations;
let loader: FluentLanguageLoader = fluent_language_loader!();
loader
.load_languages(&Localizations, &[loader.fallback_language().clone()])
.unwrap();
assert_eq!(
"Hello \u{2068}Bob 23\u{2069}!",
// Compile time check for message id, and the `name` argument,
// to ensure it matches what is specified in the `fallback_language`'s
// fluent resource file.
fl!(loader, "hello-arg", name = format!("Bob {}", 23))
)
You will notice that this macro requires loader
to be specified in every call. For you project you may have access to a statically defined loader, and you can create a convenience macro wrapper so this doesn't need to be imported and specified every time.
macro_rules! fl {
($message_id:literal) => {{
i18n_embed_fl::fl!($crate::YOUR_STATIC_LOADER, $message_id)
}};
($message_id:literal, $($args:expr),*) => {{
i18n_embed_fl::fl!($crate::YOUR_STATIC_LOADER, $message_id, $($args), *)
}};
}
This can now be invoked like so: fl!("message-id")
, fl!("message-id", args)
and fl!("message-id", arg = "value")
.