Keeps i18next JSON resource files in sync against a primary language, including plural forms. When hooked up to a build process/CI server, ensures keys added/removed from one language are correctly propagated to the other languages, reducing the chance for missing or obselete keys, merge conflicts, and typos.
Given these files:
locales
├── en.json
├── fr.json
└── ru.json
en.json
{
"key_one": "value",
"book": "book",
"book_plural": "books"
}
fr.json
{
"key_one": "french value"
}
ru.json
{
"extra_key": "extra value"
}
fr.json
and ru.json
can be synced against en.json
:
import sync from 'i18next-json-sync'
sync({
files: 'locales/*.json',
primary: 'en'
});
resulting in:
en.json
{
"key_one": "value",
"book": "book",
"book_plural": "books"
}
fr.json
{
"key_one": "french value",
"book": "book",
"book_plural": "books"
}
ru.json
{
"key_one": "value",
"book_0": "books",
"book_1": "books",
"book_2": "books"
}
key_one
was left alone in fr.json since it's already localized, but book
and book_plural
were copied over.
An extraneous key in ru.json was deleted and keys from en.json copied over. Plurals are mapped between
languages according to the i18next suffix rules.
Note: Languages with only one suffix shared for singular and plural forms will not provide plural mappings if they are used as the primary language.
This works on one folder at a time, but can deal with whatever the files glob returns. Files are grouped into directories before processing starts. Folders without a 'primary' found are ignored.
$ npm install i18next-json-sync --save-dev
import sync from 'i18next-json-sync';
//or in ES5 world:
//const sync = require('i18next-json-sync').default;
//defaults are inline:
sync({
/** Audit files in memory instead of changing them on the filesystem and
* throw an error if any changes would be made */
check: false,
/** Glob pattern for the resource JSON files */
files: '**/locales/*.json',
/** Primary localization language. Other language files will be changed to match */
primary: 'en',
/** Language files to create if they don't exist, e.g. ['es, 'pt-BR', 'fr'] */
createResources: [],
/** Space value used for JSON.stringify when writing JSON files to disk */
space: 4,
/** Line endings used when writing JSON files to disk. Either LF or CRLF */
lineEndings: 'LF',
/** Insert a final newline when writing JSON files to disk */
finalNewline: false
})
It can be installed globally and run with sync-i18n
, but package.json scripts are a better fit.
{
"name": "my-app",
"scripts": {
"i18n": "sync-i18n --files '**/locales/*.json' --primary en --languages es fr ja zh ko --space 2",
"check-i18n": "npm run i18n -- --check"
}
}
Then use npm run i18n
to sync on the filesystem and npm run check-i18n
to validate.
All options are available via CLI. Use -h
or --help
to get help output.