Demonstrate scalac plugins and compiler options.

Author: stuhood

3rdparty/jvm/com/lihaoyi/BUILD

@@ -0,0 +1,7 @@
+jvm_artifact(
+    name="acyclic",
+    group="com.lihaoyi",
+    artifact="acyclic_2.13",
+    version="0.2.1",
+    packages=["acyclic.**"],
+)

3rdparty/jvm/global_scalac_plugins.lock

@@ -0,0 +1,19 @@
+[
+    {
+        "coord": {
+            "group": "com.lihaoyi",
+            "artifact": "acyclic_2.13",
+            "version": "0.2.1",
+            "packaging": "jar"
+        },
+        "directDependencies": [],
+        "dependencies": [],
+        "file_name": "com.lihaoyi_acyclic_2.13_0.2.1.jar",
+        "file_digest": {
+            "fingerprint": "4bc4656140ad5e4802fedcdbe920ec7c92dbebf5e76d1c60d35676a314481944",
+            "serialized_bytes_length": 62534
+        },
+        "remote_url": null,
+        "pants_address": null
+    }
+]

BUILD

@@ -0,0 +1,4 @@
+scalac_plugin(
+    name="acyclic",
+    artifact="3rdparty/jvm/com/lihaoyi:acyclic",
+)

pants.toml

@@ -10,6 +10,23 @@ backend_packages = [
   "pants.backend.experimental.java.lint.google_java_format",
 ]
 
+[javac]
+args = [
+  "-deprecation",
+  "-encoding UTF-8",
+]
+
+[scalac]
+args = [
+  "-deprecation",
+  "-encoding UTF-8",
+  # An option for the compiler plugin enabled below.
+  "-P:acyclic:force",
+]
+# Globally enabled `scalac` plugins, which are defined as `scalac_plugin` targets. This one is
+# defined at the root of the repository.
+plugins_global = ["//:acyclic"]
+
 [anonymous-telemetry]
 enabled = true
 repo_id = "79B3C35A-85A9-41A4-AAA8-04484F41A8F7"