ngx-translate-extract/README.md
2017-03-30 14:42:03 +02:00

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# ngx-translate-extract
Extract translatable (ngx-translate) strings and save as a JSON or Gettext pot file.
Merges with existing strings if the output file already exists.
## Usage
Install the package in your project:
`npm install @biesbjerg/ngx-translate-extract --save-dev`
Add an `extract` script to your project's `package.json`:
```
"scripts": {
"extract": "ngx-translate-extract --input ./src --output ./src/assets/i18n/*.json --clean --sort --format namespaced-json"
}
```
You can now run `npm run extract` to extract strings.
## Extract examples
**Extract from dir and save to file**
`ngx-translate-extract -i ./src -o ./src/i18n/strings.json`
**Extract from multiple dirs**
`ngx-translate-extract -i ./src/folder-a ./src/folder-b -o ./src/i18n/strings.json`
**Extract and save to multiple files**
`ngx-translate-extract -i ./src -o ./src/i18n/{da,en,fr}.json`
**or**
`ngx-translate-extract -i ./src -o ./src/i18n/da.json ./src/i18n/en.json ./src/i18n/fr.json`
**or (update only)**
`ngx-translate-extract -i ./src -o ./src/i18n/*.json`
**or (update only)**
## Custom indentation
By default, tabs are used for indentation when writing extracted strings to json formats:
`ngx-translate-extract -i ./src -o ./src/i18n/en.json --format-indentation $'\t'`
If you want to use spaces instead, you can do the following:
`ngx-translate-extract -i ./src -o ./src/i18n/en.json --format-indentation ' '`
## Mark strings for extraction using a marker function
If, for some reason, you want to extract strings not passed directly to TranslateService, you can wrap them in a custom marker function.
```ts
import { _ } from '@biesbjerg/ngx-translate-extract';
_('Extract me');
```
Add the `marker` argument when running the extract script:
`ngx-translate-extract ... -m _`
Modify the scripts arguments as required.
## Commandline arguments
```
Usage:
ngx-translate-extract [options]
Options:
--version, -v Show version number [boolean]
--help, -h Show help [boolean]
--input, -i Paths you would like to extract strings from. You
can use path expansion, glob patterns and multiple
paths
[array] [default: current working path]
--patterns, -p Extract strings from the following file patterns
[array] [default: ["/**/*.html","/**/*.ts"]]
--output, -o Paths where you would like to save extracted
strings. You can use path expansion, glob patterns
and multiple paths [array] [required]
--marker, -m Extract strings passed to a marker function
[string] [default: false]
--format, -f Output format
[string] [choices: "json", "namespaced-json", "pot"] [default: "json"]
--format-indentation, --fi Output format indentation [string] [default: "\t"]
--replace, -r Replace the contents of output file if it exists
(Merges by default) [boolean] [default: false]
--sort, -s Sort strings in alphabetical order when saving
[boolean] [default: false]
--clean, -c Remove obsolete strings when merging
[boolean] [default: false]