WIP commit of the three attempts so far

This latest attempt nearly works except I still can't get protobuf to
stop being counted as a non-maven jar.

BUILD.bazel

@@ -126,7 +126,44 @@ filegroup(
     ),
 )
 
-java_binary(
+#attempt 3
+load("@rules_jvm_external//:defs.bzl", "java_export")
+java_export(
+    name = "exported_compiler_unshaded",
+    maven_coordinates = "com.google.javascript:closure-compiler-unshaded:v20220401",
+    runtime_deps = [
+        "//:compiler_lib",
+    ],
+)
+
+#attempt 2
+#load("@vaticle_bazel_distribution//maven:rules.bzl","assemble_maven")
+#assemble_maven(
+#    name = "compiler_unshaded_maven",
+#    target = '//:compiler_lib'
+#)
+
+#attempt 1
+#load("@google_bazel_common//tools/maven:pom_file.bzl", "pom_file")
+#pom_file(
+#    name = 'compiler_unshaded_pom',
+#    template_file = 'maven/closure-compiler-unshaded.pom.xml',
+#    targets = [
+#        '//:compiler_lib'
+#    ],
+#)
+
+
+# need a magic bazel rule that combines the following into a single jar for deployment to maven central
+# //:compiler_lib for the "runtime libs", apparently js and typedast contents
+# //:compiler_lib_no_runtime_libs for most of the sources
+# then, from compiler_lib_no_runtime_libs, we need these deps (but no others, as they are external):
+#             "//src/com/google/debugging/sourcemap/proto:mapping_java_proto",
+#            "//src/com/google/javascript/jscomp/conformance:conformance_java_proto",
+#            "//src/com/google/javascript/jscomp/instrumentation/reporter/proto:profile_java_proto",
+#            "//src/com/google/javascript/rhino/typed_ast:typed_ast_java_proto",
+
+java_binary(# also a lie, as this is a java_binary, the _deploy.jar contains all deps
     name = "compiler_unshaded_no_runtime_libs",
     main_class = "com.google.javascript.jscomp.CommandLineRunner",
     runtime_deps = [":compiler_lib_no_runtime_libs"],
@@ -171,7 +208,7 @@ oss_java_library(
             "@com_google_code_gson_gson",
             "@com_google_guava_failureaccess//jar",
             "@com_google_guava_guava//jar",
-            "@com_google_protobuf//:protobuf_java",
+            "@maven//:com_google_protobuf_protobuf_java",
             "@com_google_re2j_re2j",
             "@google_bazel_common//third_party/java/auto:value",
             "@google_bazel_common//third_party/java/error_prone:annotations",
@@ -236,7 +273,7 @@ gen_java_tests(
         "@com_google_guava_guava//jar",
         "@com_google_guava_guava_testlib//jar",
         "@com_google_jimfs_jimfs",
-        "@com_google_protobuf//:protobuf_java",
+        "@maven//:com_google_protobuf_protobuf_java",
         "@com_google_re2j_re2j",
         "@com_google_truth_extensions_truth_liteproto_extension",
         "@com_google_truth_extensions_truth_proto_extension",

WORKSPACE.bazel

@@ -33,6 +33,55 @@ load("@google_bazel_common//:workspace_defs.bzl", "google_common_workspace_rules
 
 google_common_workspace_rules()
 
+# attempt 3
+RULES_JVM_EXTERNAL_TAG = "4.2"
+RULES_JVM_EXTERNAL_SHA = "cd1a77b7b02e8e008439ca76fd34f5b07aecb8c752961f9640dea15e9e5ba1ca"
+
+http_archive(
+    name = "rules_jvm_external",
+    strip_prefix = "rules_jvm_external-%s" % RULES_JVM_EXTERNAL_TAG,
+    sha256 = RULES_JVM_EXTERNAL_SHA,
+    url = "https://github.com/bazelbuild/rules_jvm_external/archive/%s.zip" % RULES_JVM_EXTERNAL_TAG,
+)
+
+load("@rules_jvm_external//:repositories.bzl", "rules_jvm_external_deps")
+
+rules_jvm_external_deps()
+
+load("@rules_jvm_external//:setup.bzl", "rules_jvm_external_setup")
+
+rules_jvm_external_setup()
+
+# attempt 2
+#http_archive(
+#    name = "vaticle_bazel_distribution",
+#    sha256 = "aa9da4875d679b4fda680d13845d505b3033ec746b238fee5868c52f69929cba",
+#    strip_prefix = "bazel-distribution-8eb8a0e920d43bf2d3100e22e7e36dc29009bac5",
+#    urls = [
+#        "https://github.com/vaticle/bazel-distribution/archive/8eb8a0e920d43bf2d3100e22e7e36dc29009bac5.zip",
+#    ],
+#)
+#
+#load("@vaticle_bazel_distribution//common:deps.bzl","rules_kotlin", "rules_jvm_external")
+#rules_kotlin()
+#rules_jvm_external()
+#
+#load("@io_bazel_rules_kotlin//kotlin:kotlin.bzl", "kotlin_repositories", "kt_register_toolchains")
+#kotlin_repositories()
+#kt_register_toolchains()
+#
+#load("@vaticle_bazel_distribution//maven:deps.bzl", "maven_artifacts_with_versions")
+#load("@rules_jvm_external//:defs.bzl", "maven_install")
+#maven_install(
+#    artifacts = maven_artifacts_with_versions,
+#    repositories = [
+#        "https://repo1.maven.org/maven2",
+#    ],
+#    strict_visibility = True,
+#    version_conflict_policy = "pinned",
+#    fetch_sources = True,
+#)
+
 maven_import(
     # http://args4j.kohsuke.org/index.html
     group_id = "args4j",
@@ -147,3 +196,18 @@ http_archive(
 load("@com_github_johnynek_bazel_jar_jar//:jar_jar.bzl", "jar_jar_repositories")
 
 jar_jar_repositories()
+
+load("@rules_jvm_external//:defs.bzl", "maven_install")
+maven_install(
+    artifacts = [
+        "com.google.protobuf:protobuf-java:3.19.2",
+        "com.google.protobuf:protobuf-java-util:3.19.2",
+    ],
+    override_targets = {
+        "com.google.protobuf:protobuf-java": "@com_google_protobuf//:protobuf_java",
+    },
+    repositories = [
+        "https://repo1.maven.org/maven2",
+    ],
+    strict_visibility = True,
+)

maven/closure-compiler-unshaded.pom.xml

@@ -43,4 +43,7 @@
     <version>1.0-SNAPSHOT</version>
     <relativePath>closure-compiler-main.pom.xml</relativePath>
   </parent>
+  <dependencies>
+    {generated_bzl_deps}
+  </dependencies>
 </project>