Twine Flutter formatter plugin

This twine plugin provide a formatter for .arb files, used by Flutter projects.

Features

• Generation of arb files from twine
• Consumation of localized arb files into twine
• Support of arb comments
• Basic support of arb placeholders

Generation of localizations

To generate a localizations .arb file use twine generate-localization-file command.

Example: twine generate-localization-file twine.txt app_en.arb

Input twine file:

[[Section A]]
    [key1]
        en = Text with comment for translators
        comment = comment key1
    [key2]
        en = Simple text

Output arb file:

{
    "@@locale": "en",

    "key1": "Text with comment for translators",
    "@key1": {
        "description": "comment key1"
    },
    "key2": "Simple text"
}

Consumation of localizations

To consume a twin localizations file to an .arb file use twine consume-localization-file command. If you want to consume comments add -c option to the twine command.

Example: twine consume-localization-file twine.txt app_en.arb -c

Input arb file:

{
    "@@locale": "en",

    "key1": "Text with comment for translators",
    "@key1": {
        "description": "comment key1"
    },
    "key2": "Simple text"
}

Output twine file:

[[Uncategorized]]
    [key1]
        en = Text with comment for translators
        comment = comment key1
    [key2]
        en = Simple text

Warning! The arb file doesn't contain any reference to sections so all the keys are added to the "Uncategorized" section, when the -a option of consume-localization-file is used.

Placeholders

Flutter provides extended support to placeholders in the localization files.

Currently this plugin support a basic use of placeholders automatically creating an untyped placeholder for every string wrapped with curlty braces. Are only supported placeholders with lowercase chars, uppercase chars, digits, ., _ and -.

Example:

Input twine file:

[[Section B]]
    [key3]
        en = Text with {name} placeholder
    [key4]
        en = Text with double placeholders {1} and {2} and a comment
        comment = comment key4

[[Section C]]
    [key5]
        en = Placeholders with punctuation: {p_1}, {p-1}, {p.1}

Output arb file:

{
    "@@locale": "en",

    "key3": "Text with {name} placeholder",
    "@key3": {
        "placeholders": {
            "name": {}
        }
    },
    "key4": "Text with double placeholders {1} and {2} and a comment",
    "@key4": {
        "description": "comment key4",
        "placeholders": {
            "1": {},
            "2": {}
        }
    },

    "key5": "Placeholders with punctuation: {p_1}, {p-1}, {p.1}",
    "@key5": {
        "placeholders": {
            "p_1": {},
            "p-1": {},
            "p.1": {}
        }
    }
}

Installation

Install this gem:

gem install twine-flutter

Then setup twine to use this plugin as described here adding the following in a twine configuration file.

gems: twine-flutter

TODO

• Automatic testing
• Extended placeholder support