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frontend/node_modules/goober/macro/index.js

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+const { createMacro, MacroError } = require('babel-plugin-macros');
+const { addNamed } = require('@babel/helper-module-imports');
+
+module.exports = createMacro(gooberMacro);
+
+function gooberMacro({ references, babel, state }) {
+    const program = state.file.path;
+
+    if (references.default) {
+        throw new MacroError('goober.macro does not support default import');
+    }
+
+    // Inject import {...} from 'goober'
+    Object.keys(references).forEach((refName) => {
+        const id = addNamed(program, refName, 'goober');
+        references[refName].forEach((referencePath) => {
+            referencePath.node.name = id.name;
+        });
+    });
+
+    const t = babel.types;
+
+    const styledReferences = references.styled || [];
+
+    styledReferences.forEach((referencePath) => {
+        const type = referencePath.parentPath.type;
+
+        if (type === 'MemberExpression') {
+            const node = referencePath.parentPath.node;
+            const functionName = node.object.name;
+            let elementName = node.property.name;
+
+            // Support custom elements
+            if (/[A-Z]/.test(elementName)) {
+                elementName = elementName.replace(/[A-Z]/g, '-$&').toLowerCase();
+            }
+
+            referencePath.parentPath.replaceWith(
+                t.callExpression(t.identifier(functionName), [t.stringLiteral(elementName)])
+            );
+        }
+    });
+}

frontend/node_modules/goober/macro/package.json

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+{
+  "name": "goober.macro",
+  "version": "1.0.0",
+  "description": "A babel macro for goober, rewriting styled.div to styled('div') calls",
+  "main": "index.js",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/cristianbote/goober.git",
+    "directory": "macro"
+  },
+  "author": "Hadeeb Farhan <hadeebfarhan1@gmail.com>",
+  "keywords": [
+    "babel-plugin-macros",
+    "goober",
+    "styled"
+  ],
+  "license": "MIT",
+  "peerDependencies": {
+    "@babel/helper-module-imports": "^7.8.3",
+    "babel-plugin-macros": "^2.8.0"
+  }
+}