support bare-module

index.js

@@ -186,6 +186,48 @@ module.exports = class DependencyStream extends Readable {
     const basedir = key.slice(0, key.lastIndexOf('/') + 1)
     const all = []
 
+    if (deps.importsAttributes) {
+      for (const attrInput of deps.importsAttributes) {
+        const attrOutput = await this._resolveModule(attrInput, basedir)
+        const data = await this.drive.get(attrOutput)
+        if (data === null) throw new Error('Key not found: ' + key)
+
+        const source = b4a.toString(data)
+        let imports = {}
+        try {
+          const obj = JSON.parse(source)
+          if (obj === null || typeof obj !== 'object' || Array.isArray(obj)) {
+            throw new Error(`Invalid import attribute json file: ${key}`)
+          }
+          if ('imports' in obj) imports = obj.imports
+          else imports = obj
+        } catch (err) {
+          const jsonErr = new Error(`Invalid import attribute json file: ${key}`)
+          jsonErr.code = 'INVALID_JSON'
+          throw jsonErr
+        }
+
+        const modules = Object.values(imports)
+        const resolvedModules = []
+        for (const item of modules) {
+          try {
+            const res = await this._resolveModule(item, basedir)
+            resolvedModules.push(res)
+          } catch (err) {
+            const resolveErr = new Error(`Failed to resolve module ${item}`)
+            resolveErr.code = 'MODULE_NOT_FOUND'
+            throw resolveErr
+          }
+        }
+
+        for (const resolvedModule of resolvedModules) {
+          if (!result.resolutions.some(item => item.input === resolvedModule)) {
+            result.resolutions.push({ isImport: false, position: null, input: resolvedModule, output: null })
+          }
+        }
+      }
+    }
+
     for (const res of result.resolutions) {
       if (isAddonPolyfill(res.input)) {
         result.addons.push({