[gradle-plugin] Support KONAN_ENABLE_OPTIMIZATIONS env variable

tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/EnvironmentVariables.kt

@@ -23,13 +23,18 @@ import java.io.File
 /**
  *  The plugin allows an IDE to specify some building parameters. These parameters
  *  are passed to the plugin via environment variables. Two variables are supported:
- *      - CONFIGURATION_BUILD_DIR - an absolute path to a destination directory for all compilation tasks.
- *                                  The IDE should take care about specifying different directories
- *                                  for different targets. This setting has less priority than
- *                                  an explicitly specified destination directory in the build script.
- *      - DEBUGGING_SYMBOLS - If YES, the debug support will be enabled for all artifacts. This option has less
- *                            priority than explicitly specified enableDebug option in the build script and
- *                            enableDebug project property.
+ *      - CONFIGURATION_BUILD_DIR    - An absolute path to a destination directory for all compilation tasks.
+ *                                     The IDE should take care about specifying different directories
+ *                                     for different targets. This setting has less priority than
+ *                                     an explicitly specified destination directory in the build script.
+ *
+ *      - DEBUGGING_SYMBOLS          - If YES, the debug support will be enabled for all artifacts. This option has less
+ *                                     priority than explicitly specified enableDebug option in the build script and
+ *                                     enableDebug project property.
+ *
+ *      - KONAN_ENABLE_OPTIMIZATIONS - If YES, optimizations will be enabled for all artifacts by default. This option
+ *                                     has less priority than explicitly specified enableOptimizations option in the
+ *                                     build script.
  *
  *  Support for environment variables should be explicitly enabled by setting a project property:
  *      konan.useEnvironmentVariables = true.
@@ -38,6 +43,7 @@ import java.io.File
 internal interface EnvironmentVariables {
     val configurationBuildDir: File?
     val debuggingSymbols: Boolean
+    val enableOptimizations: Boolean
 }
 
 internal class EnvironmentVariablesUnused: EnvironmentVariables {
@@ -46,6 +52,9 @@ internal class EnvironmentVariablesUnused: EnvironmentVariables {
 
     override val debuggingSymbols: Boolean
         get() = false
+
+    override val enableOptimizations: Boolean
+        get() = false
 }
 
 internal class EnvironmentVariablesImpl:  EnvironmentVariables {
@@ -56,6 +65,9 @@ internal class EnvironmentVariablesImpl:  EnvironmentVariables {
 
     override val debuggingSymbols: Boolean
         get() = System.getenv("DEBUGGING_SYMBOLS")?.toUpperCase() == "YES"
+
+    override val enableOptimizations: Boolean
+        get() = System.getenv("KONAN_ENABLE_OPTIMIZATIONS")?.toUpperCase() == "YES"
 }
 
 internal val Project.useEnvironmentVariables: Boolean

tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/tasks/KonanCompileTask.kt

@@ -74,7 +74,7 @@ abstract class KonanCompileTask: KonanBuildingTask(), KonanCompileSpec {
 
     @Input var noStdLib            = false
     @Input var noMain              = false
-    @Input var enableOptimizations = false
+    @Input var enableOptimizations = project.environmentVariables.enableOptimizations
     @Input var enableAssertions    = false
 
     @Optional @Input var entryPoint: String? = null

tools/kotlin-native-gradle-plugin/src/test/groovy/org/jetbrains/kotlin/gradle/plugin/test/EnvVariableSpecification.groovy

@@ -53,7 +53,7 @@ class EnvVariableSpecification extends BaseKonanSpecification {
 
         // Gradle TestKit doesn't support setting environment variables for runners.
         // So we use the following hack: we create a gradle wrapper, start it as a separate
-        // process with custom environment variables and check its exit code.
+        // process with custom environment variables and check its exit code and output.
         runner.withArguments("wrapper").build()
 
         def classpath = runner.pluginClasspath.collect { "'${escapeBackSlashes(it.absolutePath)}'" }.join(", ")
@@ -113,8 +113,8 @@ class EnvVariableSpecification extends BaseKonanSpecification {
         return "$prefix${baseName}.$suffix"
     }
 
-    @Unroll("Plugin should support #action debug via an env variable")
-    def 'Plugin should support enabling/disabling debug via an env variable'() {
+    @Unroll("Plugin should support #action via an env variable")
+    def 'Plugin should support enabling/disabling debug/opt via an env variable'() {
         when:
         def project = createProjectWithWrapper()
         project.buildFile.append("""\
@@ -126,12 +126,12 @@ class EnvVariableSpecification extends BaseKonanSpecification {
                 task assertEnableDebug {
                     doLast {
                         konanArtifacts.main.forEach {
-                            $check
+                            if (!$assertion) throw new AssertionError("$message for \${it.name}")
                         }
                     }
                 }
                 """.stripIndent())
-        def result = runWrapper(project,"assertEnableDebug", ["DEBUGGING_SYMBOLS": value])
+        def result = runWrapper(project,"assertEnableDebug", [(variable): value])
                 .printStderr()
                 .getExitValue()
 
@@ -139,9 +139,11 @@ class EnvVariableSpecification extends BaseKonanSpecification {
         result == 0
 
         where:
-        action      |value |check
-        "enabling"  |"YES" |"if (!it.enableDebug) throw new AssertionError(\"Debug should be enabled for \${it.name}\")"
-        "disabling" |"NO"  |"if (it.enableDebug)  throw new AssertionError(\"Debug should be disabled for \${it.name}\")"
+        action            |variable                     |value |assertion                 |message
+        "enabling debug"  |"DEBUGGING_SYMBOLS"          |"YES" |"it.enableDebug"          |"Debug should be enabled"
+        "disabling debug" |"DEBUGGING_SYMBOLS"          |"NO"  |"!it.enableDebug"         |"Debug should be disabled"
+        "enabling opt"    |"KONAN_ENABLE_OPTIMIZATIONS" |"YES" |"it.enableOptimizations"  |"Opts should be enabled"
+        "disabling opt"   |"KONAN_ENABLE_OPTIMIZATIONS" |"NO"  |"!it.enableOptimizations" |"Opts should be disabled"
     }
 
     def 'Plugin should support setting destination directory via an env variable'() {