Warn about any missing / empty translations

[velosipedist]

🚀 Feature Proposal

Add an execution flag to report any missing / empty translations. Like this:

i18next -w
...
Warning: Missing 123 translation keys:
Warning: Missing translation key: "common:foo.bar.note"
...etc

Motivation

Should be useful for CI needs, to prevent untranslated builds.

Example

1. I got some new keys translated to Hindi, but forgot to add them also to Suahili strings
2. I open a PR, build starts
3. I see warnings about missing Suahili locale keys
4. I finish all the unfinished stuff
5. Build is ok 😎

[karellm]

It sounds like a good idea to me. You are welcome to open a PR and I will review it.

[jdeniau]

For a quick local test, I used https://github.com/andreyvit/json-diff that did the job for me:

npx json-diff a.json b.json --keys-only