semaphore/webpack/svelte-intl-loader.js

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// Inject intl statements into a Svelte v2 HTML file as well as some JS files like timeago.js
// We do this for perf reasons, to make the output smaller and avoid needing to have a huge JSON file of translations
import parse from 'format-message-parse'
import { getIntl, warningOrError, trimWhitespace } from '../bin/getIntl.js'
export default function (source) {
const res = source
// replace {@intl.foo}
.replace(/{intl\.([^}]+)}/g, (match, p1) => trimWhitespace(getIntl(p1)))
// replace {@html intl.foo}
.replace(/{@html intl\.([^}]+)}/g, (match, p1) => {
const html = trimWhitespace(getIntl(p1))
return `{@html ${JSON.stringify(html)}}`
})
// replace formatIntl('intl.foo' which requires the full AST object
.replace(/formatIntl\('intl\.([^']+)'/g, (match, p1) => {
const text = trimWhitespace(getIntl(p1))
const ast = parse(text)
return `formatIntl(${JSON.stringify(ast)}`
})
// replace 'intl.foo', which doesn't require the AST, just the string
.replace(/'intl\.([^']+)'/g, (match, p1) => {
const text = trimWhitespace(getIntl(p1))
return JSON.stringify(text)
})
const match = res.match(/[^(][^']intl\.([\w.]+)/) || res.match(/formatIntl\('([\w.]+)/)
if (match && match[1] !== 'js') { // don't warn on `import { formatIntl } from 'intl.js'`
return warningOrError('You probably made a typo with an intl string: ' + match[1])
}
return res
}