BazelModService.kt

package com.bazel_diff.bazel

import com.bazel_diff.log.Logger
import com.bazel_diff.process.Redirect
import com.bazel_diff.process.process
import java.nio.file.Path
import kotlinx.coroutines.ExperimentalCoroutinesApi
import kotlinx.coroutines.runBlocking
import org.koin.core.component.KoinComponent
import org.koin.core.component.inject

/**
 * Service that runs `bazel mod` to detect whether Bzlmod is enabled in the workspace.
 * Used to decide whether to query //external:all-targets (disabled when Bzlmod is active).
 */
class BazelModService(
    private val workingDirectory: Path,
    private val bazelPath: Path,
    private val startupOptions: List<String>,
    private val noBazelrc: Boolean,
) : KoinComponent {
  private val logger: Logger by inject()

  /** True if Bzlmod is enabled (e.g. `bazel mod graph` succeeds). When true, //external is not available. */
  val isBzlmodEnabled: Boolean by lazy { runBlocking { checkBzlmodEnabled() } }

  @OptIn(ExperimentalCoroutinesApi::class)
  private suspend fun checkBzlmodEnabled(): Boolean {
    val cmd =
        mutableListOf<String>().apply {
          add(bazelPath.toString())
          if (noBazelrc) {
            add("--bazelrc=/dev/null")
          }
          addAll(startupOptions)
          add("mod")
          add("graph")
        }
    logger.i { "Executing Bazel mod graph: ${cmd.joinToString()}" }
    val result =
        process(
            *cmd.toTypedArray(),
            stdout = Redirect.CAPTURE,
            stderr = Redirect.CAPTURE,
            workingDirectory = workingDirectory.toFile(),
            destroyForcibly = true,
        )
    return result.resultCode == 0
  }
}