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Pass javac options to Kapt javacArguments so the javac_options warn='off' option works for annotation processors that print warnings #1079

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Pass javac options to Kapt javacArguments so the javac_options warn='off' option works for annotation processors that print warnings #1079

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3 changes: 3 additions & 0 deletions src/main/kotlin/io/bazel/kotlin/builder/tasks/KotlinBuilder.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -53,6 +53,7 @@ class KotlinBuilder
) : Flag {
TARGET_LABEL("--target_label"),
CLASSPATH("--classpath"),
JAVAC_OPTS("--javacopts"),
DIRECT_DEPENDENCIES("--direct_dependencies"),
DEPS_ARTIFACTS("--deps_artifacts"),
SOURCES("--sources"),
Expand Down Expand Up @@ -288,6 +289,8 @@ class KotlinBuilder
?.also {
addAllSourceJars(it)
}

addAllJavacFlags(argMap.optional(KotlinBuilderFlags.JAVAC_OPTS) ?: emptyList())
}

with(root.infoBuilder) {
Expand Down
40 changes: 37 additions & 3 deletions src/main/kotlin/io/bazel/kotlin/builder/tasks/jvm/CompilationTask.kt
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Expand Up @@ -119,6 +119,35 @@ internal fun JvmCompilationTask.preProcessingSteps(
context: CompilationTaskContext,
): JvmCompilationTask = context.execute("expand sources") { expandWithSourceJarSources() }

internal fun parseJavacArgsToMap(args: List<String>): Map<String, String> {
val optionsMap = mutableMapOf<String, String>()
var i = 0

while (i < args.size) {
val arg = args[i]

// map option arguments as key value pairs e.g. --source 8 => ("--source", "8")
// map flag arguments as key with value = "true" e.g. map -nowarn => ("-nowarn", "true")
if (arg.startsWith("-")) {
val hasNext = i + 1 < args.size
val nextArg = if (hasNext) args[i + 1] else null

if (hasNext && !nextArg!!.startsWith("-")) {
optionsMap[arg] = nextArg
i += 2
} else {
optionsMap[arg] = "true"
i++
}
} else {
// Ignore non-option arguments
i++
}
}

return optionsMap
}

internal fun encodeMap(options: Map<String, String>): String {
val os = ByteArrayOutputStream()
val oos = ObjectOutputStream(os)
Expand All @@ -141,10 +170,15 @@ internal fun JvmCompilationTask.kaptArgs(
aptMode: String,
): CompilationArgs {
val javacArgs =
mapOf<String, String>(
"-target" to info.toolchainInfo.jvm.jvmTarget,
"-source" to info.toolchainInfo.jvm.jvmTarget,
parseJavacArgsToMap(
listOf(
"-target",
info.toolchainInfo.jvm.jvmTarget,
"-source",
info.toolchainInfo.jvm.jvmTarget,
).plus(inputs.javacFlagsList),
)

return CompilationArgs().apply {
xFlag("plugin", plugins.kapt.jarPath)

Expand Down
2 changes: 1 addition & 1 deletion src/main/starlark/core/options/opts.javac.bzl
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Expand Up @@ -24,7 +24,7 @@ _JOPTS = {
),
type = attr.string,
value_to_flag = {
"off": ["-nowarn"],
"off": ["-nowarn", "-Xlint:none"],
"error": ["-Werror"],
"report": None,
},
Expand Down