TEST

src/plugin/eval.js

@@ -0,0 +1,52 @@
+const { parse } = require('@babel/parser')
+const generator = require('@babel/generator').default
+const traverse = require('@babel/traverse').default
+const t = require('@babel/types')
+
+function unpack(code) {
+  let ast = parse(code, { errorRecovery: true })
+  let lines = ast.program.body
+  let data = null
+  for (let line of lines) {
+    if (t.isEmptyStatement(line)) {
+      continue
+    }
+    if (data) {
+      return null
+    }
+    if (
+      t.isCallExpression(line?.expression) &&
+      line.expression.callee?.name === 'eval' &&
+      line.expression.arguments.length === 1 &&
+      t.isCallExpression(line.expression.arguments[0])
+    ) {
+      data = t.expressionStatement(line.expression.arguments[0])
+      continue
+    }
+    return null
+  }
+  if (!data) {
+    return null
+  }
+  code = generator(data, { minified: true }).code
+  return eval(code)
+}
+
+function pack(code) {
+  let ast1 = parse('(function(){}())')
+  let ast2 = parse(code)
+  traverse(ast1, {
+    FunctionExpression(path) {
+      let body = t.blockStatement(ast2.program.body)
+      path.replaceWith(t.functionExpression(null, [], body))
+      path.stop()
+    },
+  })
+  code = generator(ast1, { minified: false }).code
+  return code
+}
+
+module.exports = {
+  unpack,
+  pack,
+}