47 lines
1.8 KiB
JavaScript
47 lines
1.8 KiB
JavaScript
/*
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Copyright 2020 DigitalOcean
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This code is licensed under the MIT License.
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You may obtain a copy of the License at
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https://github.com/digitalocean/nginxconfig.io/blob/master/LICENSE or https://mit-license.org/
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions :
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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import { diffChars } from 'diff';
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import escape from 'escape-html';
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export default (newConfName, oldConfName) => {
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// Get the diff
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const diff = diffChars(oldConfName, newConfName);
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// Wrap additions in <mark>, drop removals
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return diff.map(change => {
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if (change.removed) return '';
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const escaped = escape(change.value);
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// Don't mark as diff if nothing changed
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if (!change.added) return escaped;
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// Mark the diff, without highlighting whitespace
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return escaped.replace(/^(\s*)(.*)(\s*)$/, '$1<mark>$2</mark>$3');
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}).join('');
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};
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