[feature] assign value of javac -target flag to JvmBuildTarget's …

…`javaVersion`

add support for '--target'

change target version in test

add support for release flag

add a separate target for a target with the flag

add target flag to sample repo test

parse javac '-target' as jvm java version


Merge-request: BAZEL-MR-703
Merged-by: Katarzyna Mielnik <katarzyna.anna.mielnik@jetbrains.com>

e2e/src/main/kotlin/org/jetbrains/bsp/bazel/BazelBspSampleRepoTest.kt

@@ -142,6 +142,15 @@ object BazelBspSampleRepoTest : BazelBspTestBaseScenario() {
     )
     javaTargetsJavaBinarySources.roots = listOf("file://\$WORKSPACE/")
 
+    val javaTargetsJavaBinaryWithFlagJava = SourceItem(
+      "file://\$WORKSPACE/java_targets/JavaBinaryWithFlag.java", SourceItemKind.FILE, false
+    )
+    val javaTargetsJavaBinaryWithFlagSources = SourcesItem(
+      BuildTargetIdentifier("$targetPrefix//java_targets:java_binary_with_flag"),
+      listOf(javaTargetsJavaBinaryWithFlagJava)
+    )
+    javaTargetsJavaBinaryWithFlagSources.roots = listOf("file://\$WORKSPACE/")
+
     val javaTargetsJavaLibraryJava = SourceItem(
       "file://\$WORKSPACE/java_targets/JavaLibrary.java", SourceItemKind.FILE, false
     )
@@ -247,6 +256,7 @@ object BazelBspSampleRepoTest : BazelBspTestBaseScenario() {
         scalaTargetsScalaBinarySources,
         scalaTargetsScalaTestSources,
         javaTargetsJavaBinarySources,
+        javaTargetsJavaBinaryWithFlagSources,
         javaTargetsJavaLibrarySources,
         javaTargetsSubpackageJavaLibrarySources,
         javaTargetsJavaLibraryExportedSources,
@@ -278,6 +288,8 @@ object BazelBspSampleRepoTest : BazelBspTestBaseScenario() {
     )
     val javaTargetsJavaBinary =
       ResourcesItem(BuildTargetIdentifier("$targetPrefix//java_targets:java_binary"), emptyList())
+    val javaTargetsJavaBinaryWithFlag =
+      ResourcesItem(BuildTargetIdentifier("$targetPrefix//java_targets:java_binary_with_flag"), emptyList())
     val javaTargetsJavaLibrary =
       ResourcesItem(BuildTargetIdentifier("$targetPrefix//java_targets:java_library"), emptyList())
     val javaTargetsJavaLibraryExported = ResourcesItem(
@@ -320,6 +332,7 @@ object BazelBspSampleRepoTest : BazelBspTestBaseScenario() {
         targetWithResources,
         javaTargetsSubpackageJavaLibrary,
         javaTargetsJavaBinary,
+        javaTargetsJavaBinaryWithFlag,
         javaTargetsJavaLibrary,
         javaTargetsJavaLibraryExported,
         scalaTargetsScalaBinary,
@@ -437,6 +450,9 @@ object BazelBspSampleRepoTest : BazelBspTestBaseScenario() {
     val javaTargetsJavaBinary = DependencySourcesItem(
       BuildTargetIdentifier("$targetPrefix//java_targets:java_binary"), emptyList()
     )
+    val javaTargetsJavaBinaryWithFlag = DependencySourcesItem(
+      BuildTargetIdentifier("$targetPrefix//java_targets:java_binary_with_flag"), emptyList()
+    )
     val javaTargetsJavaLibrary = DependencySourcesItem(
       BuildTargetIdentifier("$targetPrefix//java_targets:java_library"), emptyList()
     )
@@ -497,6 +513,7 @@ object BazelBspSampleRepoTest : BazelBspTestBaseScenario() {
     val expectedDependencies = DependencySourcesResult(
       listOf(
         javaTargetsJavaBinary,
+        javaTargetsJavaBinaryWithFlag,
         javaTargetsJavaLibrary,
         targetWithDependencyJavaBinary,
         javaTargetsSubpackageJavaLibrary,
@@ -543,6 +560,15 @@ object BazelBspSampleRepoTest : BazelBspTestBaseScenario() {
         ).apply {
           mainClasses = listOf(JvmMainClass("java_targets.JavaBinary", emptyList()))
         },
+        JvmEnvironmentItem(
+          BuildTargetIdentifier("$targetPrefix//java_targets:java_binary_with_flag"),
+          listOf(),
+          emptyList(),
+          "\$WORKSPACE",
+          mapOf()
+        ).apply {
+          mainClasses = listOf(JvmMainClass("java_targets.JavaBinaryWithFlag", emptyList()))
+        },
         JvmEnvironmentItem(
           BuildTargetIdentifier("$targetPrefix//java_targets:java_library"),
           listOf(),
@@ -771,6 +797,15 @@ object BazelBspSampleRepoTest : BazelBspTestBaseScenario() {
         ).apply {
           mainClasses = listOf(JvmMainClass("java_targets.JavaBinary", emptyList()))
         },
+        JvmEnvironmentItem(
+          BuildTargetIdentifier("$targetPrefix//java_targets:java_binary_with_flag"),
+          listOf(),
+          emptyList(),
+          "\$WORKSPACE",
+          mapOf()
+        ).apply {
+          mainClasses = listOf(JvmMainClass("java_targets.JavaBinaryWithFlag", emptyList()))
+        },
         JvmEnvironmentItem(
           BuildTargetIdentifier("$targetPrefix//java_targets:java_library"),
           listOf(),
@@ -992,6 +1027,11 @@ object BazelBspSampleRepoTest : BazelBspTestBaseScenario() {
       it.javaVersion = "11"
     }
 
+    val jvmBuildTargetWithFlag = JvmBuildTarget().also {
+      it.javaHome = "file://\$BAZEL_OUTPUT_BASE_PATH/external/remotejdk11_\$OS/"
+      it.javaVersion = "8"
+    }
+
     val javaTargetsJavaBinary = BuildTarget(
       BuildTargetIdentifier("$targetPrefix//java_targets:java_binary"),
       listOf("application"),
@@ -1004,6 +1044,18 @@ object BazelBspSampleRepoTest : BazelBspTestBaseScenario() {
     javaTargetsJavaBinary.dataKind = "jvm"
     javaTargetsJavaBinary.data = jvmBuildTarget
 
+    val javaTargetsJavaBinaryWithFlag = BuildTarget(
+      BuildTargetIdentifier("$targetPrefix//java_targets:java_binary_with_flag"),
+      listOf("application"),
+      listOf("java"),
+      emptyList(),
+      BuildTargetCapabilities().also { it.canCompile = true; it.canTest = false; it.canRun = true; it.canDebug = false }
+    )
+    javaTargetsJavaBinaryWithFlag.displayName = "$targetPrefix//java_targets:java_binary_with_flag"
+    javaTargetsJavaBinaryWithFlag.baseDirectory = "file://\$WORKSPACE/java_targets/"
+    javaTargetsJavaBinaryWithFlag.dataKind = "jvm"
+    javaTargetsJavaBinaryWithFlag.data = jvmBuildTargetWithFlag
+
     val scalaBuildTarget = ScalaBuildTarget(
       "org.scala-lang",
       "2.12.14",
@@ -1270,6 +1322,7 @@ object BazelBspSampleRepoTest : BazelBspTestBaseScenario() {
     return WorkspaceBuildTargetsResult(
       listOf(
         javaTargetsJavaBinary,
+        javaTargetsJavaBinaryWithFlag,
         scalaTargetsScalaBinary,
         javaTargetsSubpackageSubpackage,
         javaTargetsJavaLibrary,

e2e/test-resources/sample-repo/java_targets/BUILD

@@ -11,6 +11,18 @@ java_binary(
     visibility = ["//visibility:public"],
 )
 
+java_binary(
+    name = "java_binary_with_flag",
+    srcs = ["JavaBinaryWithFlag.java"],
+    javacopts = [
+        "-Werror",
+        "-Xlint:all",
+        "-target 8",
+    ],
+    main_class = "java_targets.JavaBinaryWithFlag",
+    visibility = ["//visibility:public"],
+)
+
 java_library(
     name = "java_library",
     srcs = ["JavaLibrary.java"],

e2e/test-resources/sample-repo/java_targets/JavaBinaryWithFlag.java

@@ -0,0 +1,7 @@
+package java_targets;
+
+public class JavaBinaryWithFlag {
+    public static void main(String[] args) {
+        System.out.println("Hello, world!");
+    }
+}

server/src/main/kotlin/org/jetbrains/bsp/bazel/server/sync/languages/java/JavaLanguagePlugin.kt

@@ -79,11 +79,19 @@ class JavaLanguagePlugin(
         buildTarget.data = jvmBuildTarget
     }
 
+    private fun javaVersionFromJavacOpts(javacOpts: List<String>): String? =
+        javacOpts.mapNotNull {
+            val flagName = it.substringBefore(' ')
+            val argument = it.substringAfter(' ')
+            if (flagName == "-target" || flagName == "--target" || flagName == "--release") argument else null
+        }.firstOrNull()
+
+
     fun toJvmBuildTarget(javaModule: JavaModule): JvmBuildTarget {
         val jdk = javaModule.jdk
         val javaHome = jdk.javaHome?.toString()
         return JvmBuildTarget().also {
-            it.javaVersion = jdk.version
+            it.javaVersion = javaVersionFromJavacOpts(javaModule.javacOpts)?: jdk.version
             it.javaHome = javaHome
         }
     }