Angular JSON extract i18n and merge

Based on ngx-extract-i18n-merge by @daniel-sc.

This extends Angular CLI to improve the i18n extraction and merge workflow. New/removed translations are added/removed from the target translation files. Additionally, translation files are normalized (pretty print, sorted by id) so that diffs are easy to read (and translations in PRs might actually get reviewed ;-) ).

Install

Prerequisites: i18n setup with defined target locales in angular.json - as documented here.

ng add ngx-extract-i18n-merge-json

Usage

ng extract-i18n # this replaces and extends the original builder

Configuration

In your angular.json the target extract-i18n that can be configured with the following options:

Name	Default	Description
browserTarget	Inferred from current setup by ng add	A browser builder target to extract i18n messages in the format of project:target[:configuration]. See https://angular.io/cli/extract-i18n#options
outputPath	Inferred from current setup by ng add	Path to folder containing all (source and target) translation files.
targetFiles	Inferred from current setup by ng add	Filenames (relative to outputPath of all target translation files (e.g. {"fr-FR": "messages.fr.json", "de-DE": "messages.de.json").
sourceLocale	Undefined	If this is set (to one of the targetFiles locales), new translations in that target file won't include the newPrefix prefix).
sourceFile	messages.json. ng add tries to infer non default setups.	Filename (relative to outputPath of source translation file (e.g. "translations-source.json").
newPrefix	This prefix will be added to all new translations (e.g. @new).
removeIdsWithPrefix	[]	List of prefix strings. All translation units with matching id attribute are removed. Useful for excluding duplicate library translations.
collapseWhitespace	true	Collapsing of multiple whitespaces/line breaks in translation sources and targets.
trim	false	Trim translation sources and targets.
includeContext	false	Whether to include the context information (like notes) in the translation files. This is useful for sending the target translation files to translation agencies/services. When sourceFileOnly the context is retained only in the sourceFile.
newTranslationTargetsBlank	false	When false (default) the "target" of new translation units is set to the "source" value. When true, an empty string is used. When 'omit', no target element is created.
builderI18n	"@angular-devkit/build-angular:extract-i18n"	The builder to use for i18n extraction. Any custom builder should handle the same options as the default angular builder (browserTarget, outputPath, outFile, format, progress).
verbose	false	Extended/debug output - it is recommended to use this only for manual debugging.

Contribute

Feedback and PRs always welcome :-)

Before developing complex changes, I'd recommend opening an issue to discuss whether the indented goals match the scope of this package.