ngx-translate-extract/bin/extract.js

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#! /usr/bin/env node
const Extractor = require('../dist/extractor').Extractor;
const PipeParser = require('../dist/parsers/pipe.parser').PipeParser;
const DirectiveParser = require('../dist/parsers/directive.parser').DirectiveParser;
const ServiceParser = require('../dist/parsers/service.parser').ServiceParser;
const JsonCompiler = require('../dist/compilers/json.compiler').JsonCompiler;
const PoCompiler = require('../dist/compilers/po.compiler').PoCompiler
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const fs = require('fs');
const path = require('path');
const cli = require('cli');
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const options = cli.parse({
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dir: ['d', 'Directory path you would like to extract strings from', 'dir', process.env.PWD],
output: ['o', 'Directory path you would like to save extracted strings', 'dir', process.env.PWD],
format: ['f', 'Output format', ['json', 'pot'], 'json'],
replace: ['r', 'Replace the contents of output file if it exists (merging by default)', 'boolean', false],
clean: ['c', 'Remove unused keys when merging', 'boolean', false]
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});
[options.dir, options.output].forEach(dir => {
if (!fs.existsSync(dir)) {
cli.fatal('The directory path you supplied was not found: ' + dir);
}
});
const filename = 'template.' + options.format;
const dest = path.join(options.output, filename);
const parsers = [
new PipeParser(),
new DirectiveParser(),
new ServiceParser()
];
const patterns = [
'/**/*.html',
'/**/*.ts',
'/**/*.js'
];
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const extractor = new Extractor(parsers, patterns);
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try {
cli.info(`Extracting strings from '${options.dir}'`);
const extracted = extractor.process(options.dir);
cli.ok(`* Extracted ${extracted.count()} strings`);
if (extracted.isEmpty()) {
process.exit();
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}
let collection = extracted;
let compiler = new JsonCompiler();
if (options.format === 'pot') {
compiler = new PoCompiler();
}
if (!options.replace && fs.existsSync(dest)) {
const existing = compiler.parse(fs.readFileSync(dest, 'utf-8'));
collection = extracted.union(existing);
cli.ok(`* Merged ${existing.count()} existing strings`);
if (options.clean) {
const collectionCount = collection.count();
collection = collection.intersect(extracted);
const removeCount = collectionCount - collection.count();
if (removeCount > 0) {
cli.ok(`* Removed ${removeCount} unused strings`);
}
}
}
fs.writeFileSync(dest, compiler.compile(collection));
cli.ok(`* Saved to '${dest}'`);
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} catch (e) {
cli.fatal(e.toString());
}