fix esbuild issue when requiring esm files

Author: crysmags

packages/datadog-esbuild/index.js

@@ -96,7 +96,8 @@ module.exports.setup = function (build) {
 
       let pathToPackageJson
       try {
-        pathToPackageJson = require.resolve(`${extracted.pkg}/package.json`, { paths: [args.resolveDir] })
+        pathToPackageJson = require.resolve(extracted.pkg, { paths: [args.resolveDir] })
+        pathToPackageJson = extractPackageAndModulePath(pathToPackageJson).pkgJson
       } catch (err) {
         if (err.code === 'MODULE_NOT_FOUND') {
           if (!internal) {
@@ -111,7 +112,7 @@ module.exports.setup = function (build) {
         }
       }
 
-      const packageJson = require(pathToPackageJson)
+      const packageJson = JSON.parse(fs.readFileSync(pathToPackageJson).toString())
 
       if (DEBUG) console.log(`RESOLVE: ${args.path}@${packageJson.version}`)
 

packages/datadog-instrumentations/src/utils/src/extract-package-and-module-path.js

@@ -6,7 +6,7 @@ const NM = 'node_modules/'
  * For a given full path to a module,
  *   return the package name it belongs to and the local path to the module
  *   input: '/foo/node_modules/@co/stuff/foo/bar/baz.js'
- *   output: { pkg: '@co/stuff', path: 'foo/bar/baz.js' }
+ *   output: { pkg: '@co/stuff', path: 'foo/bar/baz.js',  pkgJson: '/foo/node_modules/@co/stuff/package.json' }
  */
 module.exports = function extractPackageAndModulePath (fullPath) {
   const nm = fullPath.lastIndexOf(NM)
@@ -17,17 +17,20 @@ module.exports = function extractPackageAndModulePath (fullPath) {
   const subPath = fullPath.substring(nm + NM.length)
   const firstSlash = subPath.indexOf('/')
 
+  const firstPath = fullPath.substring(fullPath[0], nm + NM.length)
+
   if (subPath[0] === '@') {
     const secondSlash = subPath.substring(firstSlash + 1).indexOf('/')
-
     return {
       pkg: subPath.substring(0, firstSlash + 1 + secondSlash),
-      path: subPath.substring(firstSlash + 1 + secondSlash + 1)
+      path: subPath.substring(firstSlash + 1 + secondSlash + 1),
+      pkgJson: firstPath + subPath.substring(0, firstSlash + 1 + secondSlash) + '/package.json'
     }
   }
 
   return {
     pkg: subPath.substring(0, firstSlash),
-    path: subPath.substring(firstSlash + 1)
+    path: subPath.substring(firstSlash + 1),
+    pkgJson: firstPath + subPath.substring(0, firstSlash) + '/package.json'
   }
 }