better error message when dbt executable can't be found (#169)

Author: ramonvermeulen

README.md

@@ -39,6 +39,7 @@ through `{{ ref() }}` and `{{ source() }}` tags.
 
 ## Prerequisites
 * For IntelliJ users, it is required to have the [**Python**](https://plugins.jetbrains.com/plugin/631-python) plugin installed so that you can configure a venv.
+<br>![Set-up venv](./assets/img/settings.jpg)
 * I also recommended to have a venv configured and [**dbt-core**](https://pypi.org/project/dbt-core/) with your required adapter installed within the venv: <br>
 `File` > `Project Structure` > `SDK` > `Select Python` > `Select New Virtual Environment`. If not it is required to have dbt-core globally installed.
 * Supported/Tested dbt versions are: >=1.7.0

assets/img/settings.jpg

@@ -5,6 +5,7 @@ import com.intellij.openapi.components.Service
 import com.intellij.openapi.components.service
 import com.intellij.openapi.project.Project
 import java.io.File
+import java.io.IOException
 
 @Service(Service.Level.PROJECT)
 class ProcessExecutorService(project: Project) {
@@ -20,7 +21,20 @@ class ProcessExecutorService(project: Project) {
     fun executeCommand(command: List<String>): Process {
         val processBuilder = getDbtProcessBuilder(command)
         loggingService.log(">>> ${processBuilder.command().joinToString(" ")}\n", ConsoleViewContentType.NORMAL_OUTPUT)
-        processBuilder.directory(settings.state.settingsDbtProjectDir.let { File(it) })
+        try {
+            processBuilder.directory(settings.state.settingsDbtProjectDir.let { File(it) })
+            return processBuilder.start()
+        } catch (e: IOException) {
+            if (e.message?.contains("Cannot run program") == true) {
+                loggingService.log(
+                    "An error occurred, could not find dbt executable. Please install dbt globally or configure a virtual environment.\n",
+                    ConsoleViewContentType.LOG_ERROR_OUTPUT,
+                )
+                loggingService.log(e.message!!, ConsoleViewContentType.LOG_ERROR_OUTPUT)
+            } else {
+                throw e
+            }
+        }
         return processBuilder.start()
     }