1 files changed, 40 insertions, 0 deletions
diff --git a/dokka-runners/dokkatoo/modules/dokkatoo-plugin/src/testFixtures/kotlin/systemVariableProviders.kt b/dokka-runners/dokkatoo/modules/dokkatoo-plugin/src/testFixtures/kotlin/systemVariableProviders.kt
new file mode 100644
index 00000000..b15b3edb
--- /dev/null
+++ b/dokka-runners/dokkatoo/modules/dokkatoo-plugin/src/testFixtures/kotlin/systemVariableProviders.kt
@@ -0,0 +1,40 @@
+package org.jetbrains.dokka.dokkatoo.utils
+
+import kotlin.properties.ReadOnlyProperty
+
+// Utilities for fetching System Properties and Environment Variables via delegated properties
+
+
+internal fun optionalSystemProperty() = optionalSystemProperty { it }
+
+internal fun <T : Any> optionalSystemProperty(
+  convert: (String) -> T?
+): ReadOnlyProperty<Any, T?> =
+  ReadOnlyProperty { _, property ->
+    val value = System.getProperty(property.name)
+    if (value != null) convert(value) else null
+  }
+
+
+internal fun systemProperty() = systemProperty { it }
+
+internal fun <T> systemProperty(
+  convert: (String) -> T
+): ReadOnlyProperty<Any, T> =
+  ReadOnlyProperty { _, property ->
+    val value = requireNotNull(System.getProperty(property.name)) {
+      "system property ${property.name} is unavailable"
+    }
+    convert(value)
+  }
+
+
+internal fun optionalEnvironmentVariable() = optionalEnvironmentVariable { it }
+
+internal fun <T : Any> optionalEnvironmentVariable(
+  convert: (String) -> T?
+): ReadOnlyProperty<Any, T?> =
+  ReadOnlyProperty { _, property ->
+    val value = System.getenv(property.name)
+    if (value != null) convert(value) else null
+  }