Crate simple_i18n

A simple compile time i18n implementation in Rust.

Repo

i18n-rs will load your locale (toml, json or yaml) into the code during compilation. Then you can use lang! (to switch the locale) and use i18n to get the text.

Example

LOCALE_PATH

The LOCALE_PATH environment variable is used to find your locale file.

Please note that because the dependent library cannot get the current path where you actually run the build command during compilation, the safest method is actually to use the absolute path.

Usually we will store locale files in the locale directory in the project root directory and set LOCALE_PATH to locale.

The current behavior is:

i18n-rs will find ${workspace_root}/$LOCALE_PATH in OUT_DIR or ./ using cargo metadata.

In other words, if LOCALE_PATH is a relative path, it should be based on the workspace_root of the project, not the user’s current path.

And it is best to run the build command in the project root directory.

Locale files

The locale file supports json, toml, yaml.

You can use a single file or use a folder. In the case of a single file, the language code is the file name.

In the case of a folder, the folder name is language code, and the subfolder and file name will be used as the field name.

You can add . in front of the file name to avoid becoming a field name.

The content will be flattened, and the key will be linked together with . to become the field name.

Example:

{
    "words": {
        "greetings": {
            "hi": "Hi!"
        }
    }
}

equal

{
    "words.greetings.hi": "Hi!"
}

Strict and Loose

By default, strict checking will be used.

In loose mode, if you try to get a non-existent field or a non-existent locale, the field itself will be returned.

But strict mode will check your input in lang! and i18n! to make sure that you are using the existing locale and fields that exist in all locales.

If there is an error, it will be panic!.

Don’t worry, all of this is checked at compile time, so strict checking will hardly affect runtime performance, and there will be not panic at runtime.

note: Because it needs to be checked at compile time, string literals must be used in strict mode

Fortunately, We can freely switch between loose and strict mode. like i18n!("xxx.x"; loose).

Macros

i18n	Get text i18n!("words.hello") i18n!("words.hello"; loose)
lang	Change language lang!("en-us"); lang!("en-us"; loose);

Structs

Language

Functions

_match_message