IssueTracker

Component used: AGP plugin with data binding activated

Version used: AGP 7.2.1, also reproduced with 7.4.0-alpha08

Using kotlin 1.6.20, it works Using kotlin 1.7.0, it doesn't

In a kotlin multiplatform library module with kotlin 1.7.0, data binding compiler is no longer able to resolve types of bound classes. I attached a simple reproduction project where you can see in the data_binding_artifact setter store that types are resolved to error.NonExistentClass. Later on it leads to a databinding error Cannot find a setter for XYZ but the root cause is the type not being resolved properly.

With Kotlin 1.7.0 (FAIL)

• ./gradlew :module:assembleDebug Task succeeds but types are not resolved.
• ./gradlew :assembleDebug Task fails due to data binding errors

{
   "version":5,
   "adapterMethods":{
      "moduleData":[
         [
            {
               "viewType":"android.widget.TextView",
               "valueType":"error.NonExistentClass"
            },
            {
               "type":"com.example.module.SomeDataBindingKt",
               "method":"bindSomeModuleData",
               "requiresOldValue":false,
               "isStatic":true,
               "componentClass":null
            }
         ]
      ]
   },
   "renamedMethods":{
      
   },
   "conversionMethods":{
      
   },
   "untaggableTypes":{
      
   },
   "multiValueAdapters":{
      
   },
   "inverseAdapters":{
      
   },
   "inverseMethods":{
      
   },
   "twoWayMethods":{
      
   },
   "useAndroidX":true
}

With Kotlin 1.6.20 (OK)

• ./gradlew :module:assembleDebug Task succeeds.
• ./gradlew :assembleDebug Task succeeds

{
   "version":5,
   "adapterMethods":{
      "moduleData":[
         [
            {
               "viewType":"android.widget.TextView",
               "valueType":"com.example.module.SomeModuleData"
            },
            {
               "type":"com.example.module.SomeDataBindingKt",
               "method":"bindSomeModuleData",
               "requiresOldValue":false,
               "isStatic":true,
               "componentClass":null
            }
         ]
      ]
   },
   "renamedMethods":{
      
   },
   "conversionMethods":{
      
   },
   "untaggableTypes":{
      
   },
   "multiValueAdapters":{
      
   },
   "inverseAdapters":{
      
   },
   "inverseMethods":{
      
   },
   "twoWayMethods":{
      
   },
   "useAndroidX":true
}

Note: Even with kotlin 1.6.20, it seems you have to build the project twice in order to make it work when it is configured as a project dependency.

Project structure which reproduce the issue is specific to kmm.

module
  - src
     - androidMain (Binding adapter)
     - commonMain (Binding classes)

I wasn't sure if this issue was related to the databinding compiler, kotlin kapt gradle plugin or multiplatform gradle plugin so therefore, I will start creating this one and create another in jetbrains bug tracker if needed.