115 lines
3.2 KiB
JavaScript
115 lines
3.2 KiB
JavaScript
import MagicString from 'magic-string';
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import { createFilter } from '@rollup/pluginutils';
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function escape(str) {
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return str.replace(/[-[\]/{}()*+?.\\^$|]/g, '\\$&');
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}
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function ensureFunction(functionOrValue) {
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if (typeof functionOrValue === 'function') { return functionOrValue; }
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return function () { return functionOrValue; };
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}
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function longest(a, b) {
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return b.length - a.length;
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}
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function getReplacements(options) {
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if (options.values) {
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return Object.assign({}, options.values);
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}
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var values = Object.assign({}, options);
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delete values.delimiters;
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delete values.include;
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delete values.exclude;
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delete values.sourcemap;
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delete values.sourceMap;
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return values;
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}
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function mapToFunctions(object) {
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return Object.keys(object).reduce(function (fns, key) {
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var functions = Object.assign({}, fns);
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functions[key] = ensureFunction(object[key]);
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return functions;
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}, {});
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}
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function replace(options) {
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if ( options === void 0 ) options = {};
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var filter = createFilter(options.include, options.exclude);
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var delimiters = options.delimiters;
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var preventAssignment = options.preventAssignment;
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var functionValues = mapToFunctions(getReplacements(options));
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var keys = Object.keys(functionValues).sort(longest).map(escape);
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var lookahead = preventAssignment ? '(?!\\s*=[^=])' : '';
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var pattern = delimiters
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? new RegExp(
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((escape(delimiters[0])) + "(" + (keys.join('|')) + ")" + (escape(delimiters[1])) + lookahead),
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'g'
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)
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: new RegExp(("\\b(" + (keys.join('|')) + ")\\b" + lookahead), 'g');
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return {
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name: 'replace',
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buildStart: function buildStart() {
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if (![true, false].includes(preventAssignment)) {
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this.warn({
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message:
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"@rollup/plugin-replace: 'preventAssignment' currently defaults to false. It is recommended to set this option to `true`, as the next major version will default this option to `true`."
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});
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}
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},
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renderChunk: function renderChunk(code, chunk) {
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var id = chunk.fileName;
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if (!keys.length) { return null; }
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if (!filter(id)) { return null; }
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return executeReplacement(code, id);
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},
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transform: function transform(code, id) {
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if (!keys.length) { return null; }
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if (!filter(id)) { return null; }
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return executeReplacement(code, id);
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}
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};
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function executeReplacement(code, id) {
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var magicString = new MagicString(code);
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if (!codeHasReplacements(code, id, magicString)) {
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return null;
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}
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var result = { code: magicString.toString() };
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if (isSourceMapEnabled()) {
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result.map = magicString.generateMap({ hires: true });
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}
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return result;
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}
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function codeHasReplacements(code, id, magicString) {
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var result = false;
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var match;
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// eslint-disable-next-line no-cond-assign
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while ((match = pattern.exec(code))) {
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result = true;
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var start = match.index;
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var end = start + match[0].length;
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var replacement = String(functionValues[match[1]](id));
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magicString.overwrite(start, end, replacement);
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}
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return result;
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}
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function isSourceMapEnabled() {
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return options.sourceMap !== false && options.sourcemap !== false;
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}
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}
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export default replace;
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