added doiuse plugin for postcss

1 files changed, 36 insertions, 0 deletions

diff --git a/node_modules/doiuse/lib/stream/CssUsageDuplex.js b/node_modules/doiuse/lib/stream/CssUsageDuplex.js
new file mode 100644
index 00000000..063ed1dc
--- /dev/null
+++ b/node_modules/doiuse/lib/stream/CssUsageDuplex.js
@@ -0,0 +1,36 @@
+/* eslint-disable no-underscore-dangle */
+
+import { pipeline } from 'node:stream';
+
+import Tokenize from 'css-tokenize';
+import Duplexify from 'duplexify';
+
+import RuleUsageTransform from './RuleUsageTransform.js';
+import SourceMapTransform from './SourceMapTransform.js';
+
+/** @typedef {import('../../data/features.js').FeatureKeys} FeatureKeys */
+
+export default class CssUsageDuplex extends Duplexify {
+  /**
+   * @param {Object} options
+   * @param {string} options.browsers
+   * @param {FeatureKeys[]} [options.ignore]
+   * @param {boolean} [options.skipErrors]
+   * @param {string} [filename] Filename for outputting source code locations.
+   */
+  constructor(options, filename) {
+    const streams = [
+      new Tokenize(),
+      new SourceMapTransform(),
+      new RuleUsageTransform(options, filename),
+    ];
+    pipeline(
+      // @ts-expect-error Bad typings
+      ...streams,
+      () => {
+        // noop (Error handled by Duplexify)
+      },
+    );
+    super(streams[0], streams.at(-1), { objectMode: true });
+  }
+}