harness: Add ability to specify custom configuration from CLI

This change updates the command line interface of the OpenDC Experiment
Harness to include an option for specifying a custom configuration file.

1 files changed, 11 insertions, 0 deletions

diff --git a/opendc-harness/opendc-harness-cli/src/main/kotlin/org/opendc/harness/runner/cli/ConsoleRunner.kt b/opendc-harness/opendc-harness-cli/src/main/kotlin/org/opendc/harness/runner/cli/ConsoleRunner.kt
index 82adb2fd..06800f0e 100644
--- a/opendc-harness/opendc-harness-cli/src/main/kotlin/org/opendc/harness/runner/cli/ConsoleRunner.kt
+++ b/opendc-harness/opendc-harness-cli/src/main/kotlin/org/opendc/harness/runner/cli/ConsoleRunner.kt
@@ -79,9 +79,20 @@ public class ConsoleRunner : CliktCommand(name = "opendc-harness") {
         .multiple()
         .unique()
 
+    /**
+     * Configuration file to load.
+     */
+    private val config by option("-c", "--config", help = "Configuration file for the experiments")
+        .file(mustExist = true, canBeDir = false, mustBeReadable = true)
+
     override fun run() {
         logger.info { "Starting OpenDC Console Experiment Runner" }
 
+        val config = config
+        if (config != null) {
+            System.setProperty("config.file", config.path)
+        }
+
         val classLoader = createClassLoader()
         // TODO: Add way to specify class loader for scheduler
         Thread.currentThread().contextClassLoader = classLoader