Add bazel build.

.bazelrc

@@ -0,0 +1,4 @@
+common --tool_java_language_version=21
+common --tool_java_runtime_version=remotejdk_21
+common --java_runtime_version=remotejdk_21
+try-import user.bazelrc

.bazelversion

@@ -0,0 +1 @@
+9.1.0

.gitignore

@@ -104,3 +104,8 @@ _deps
 .nfs*
 
 # End of https://www.gitignore.io/api/c++,cmake,linux
+##############
+# Bazel      #
+##############
+user.bazelrc
+bazel-*

.scalafmt.conf

@@ -3,3 +3,4 @@ runner.dialect = scala3
 preset = IntelliJ
 maxColumn = 120
 align.preset = true
+project.excludeFilters = [".*\\.sbt$", ".*\\.sc$", "project/.*\\.scala"]

BUILD

@@ -0,0 +1,11 @@
+exports_files([".scalafmt.conf"])
+
+alias(
+    name = "format",
+    actual = "//bazel/format",
+)
+
+alias(
+    name = "formatCheck",
+    actual = "//bazel/format:format.check",
+)

MODULE.bazel

@@ -0,0 +1,77 @@
+module(name = "codepropertygraph")
+
+bazel_dep(name = "protobuf", version = "34.1")
+bazel_dep(name = "bazel_tooling")
+bazel_dep(name = "rules_jvm_external", version = "7.0")
+bazel_dep(name = "aspect_rules_lint", version = "2.5.2")
+bazel_dep(name = "buildifier_prebuilt", version = "8.5.1.2")
+
+JOERN_VERSION = "db325972fdf72e53f76beba77b72e84b2c469905"
+
+git_override(
+    module_name = "bazel_tooling",
+    commit = "{}".format(JOERN_VERSION),
+    remote = "git@github.com:joernio/joern.git",
+    strip_prefix = "bazel/tooling",
+)
+
+bazel_dep(name = "rules_scala", version = "7.2.4")
+
+scala_config = use_extension(
+    "@rules_scala//scala/extensions:config.bzl",
+    "scala_config",
+)
+scala_config.settings(
+    scala_version = "3.7.4",
+)
+
+scala_deps = use_extension(
+    "@rules_scala//scala/extensions:deps.bzl",
+    "scala_deps",
+)
+scala_deps.scala()
+scala_deps.scalatest()
+
+register_toolchains("@bazel_tooling//scala_toolchain:plus_one_toolchain")
+
+maven = use_extension("@rules_jvm_external//:extensions.bzl", "maven")
+maven.install(
+    name = "maven",
+    artifacts = [
+        "org.slf4j:slf4j-api:2.0.17",
+        "io.joern:flatgraph-core_3:0.1.31",
+        "io.joern:flatgraph-help_3:0.1.31",
+        "io.joern:flatgraph-domain-classes-generator_3:0.1.31",
+        "io.joern:flatgraph-odb-convert_3:0.1.31",
+        "net.sf.trove4j:core:3.1.0",
+        "com.google.protobuf:protobuf-java:4.34.1",
+        "org.json4s:json4s-native_3:4.0.3",
+        "com.lihaoyi:os-lib_3:0.11.4",
+    ],
+    excluded_artifacts = [
+        # Exclude any scala libraries which might come in transitively.
+        # rules_scala will add the correct scala library for the configured Scala version.
+        # That way we do not have conflicts between different scala library versions on
+        # the build classpath.
+        "org.scala-lang:scala3-library_3",
+        "org.scala-lang:scala-library",
+    ],
+    fetch_sources = True,
+    lock_file = "//:maven_install.json",
+    repositories = [
+        "https://repo1.maven.org/maven2",
+    ],
+)
+use_repo(maven, "maven")
+
+maven.install(
+    name = "format_maven",
+    artifacts = [
+        "org.scalameta:scalafmt-cli_2.13:3.9.6",
+    ],
+    lock_file = "//:format_maven_install.json",
+    repositories = [
+        "https://repo1.maven.org/maven2",
+    ],
+)
+use_repo(maven, "format_maven")

bazel/format/BUILD

@@ -0,0 +1,17 @@
+load("@aspect_rules_lint//format:defs.bzl", "format_multirun")
+load("//bazel:java.bzl", "java_binary")
+
+java_binary(
+    name = "scalafmt",
+    data = ["//:.scalafmt.conf"],
+    main_class = "org.scalafmt.cli.Cli",
+    runtime_deps = ["@format_maven//:org_scalameta_scalafmt_cli_2_13"],
+)
+
+format_multirun(
+    name = "format",
+    scala = ":scalafmt",
+    starlark = "@buildifier_prebuilt//:buildifier",
+    starlark_check_args = ["-mode=diff"],
+    visibility = ["//visibility:public"],
+)

bazel/java.bzl

@@ -0,0 +1,17 @@
+load("@bazel_tooling//:java_rule_factory.bzl", "make_java_rules")
+
+_rules = make_java_rules(
+    java_common_opts = [
+        "-g",
+        "--release",
+        "11",
+        "-Xlint:all",
+        "-Xlint:-cast",
+        "-XepDisableAllChecks",
+    ],
+)
+
+java_library = _rules.java_library
+java_binary = _rules.java_binary
+java_test = _rules.java_test
+java_import = _rules.java_import

bazel/scala.bzl

@@ -0,0 +1,19 @@
+load("@bazel_tooling//:scala_rule_factory.bzl", "make_scala_rules")
+
+_rules = make_scala_rules(
+    scala_version = "3.7.4",
+    common_scalacopts = [
+        "-java-output-version",
+        "17",
+        "-no-indent",
+        "-old-syntax",
+        "-Wshadow:type-parameter-shadow",
+        "-deprecation",
+        "-Wconf:msg=Implicit parameters should be provided with a `using` clause:s",
+    ],
+    common_scalatest_runtime_deps = [],
+)
+
+scala_library = _rules.scala_library
+scala_binary = _rules.scala_binary
+scala_test = _rules.scala_test

codepropertygraph/BUILD

@@ -0,0 +1,28 @@
+load("//bazel:scala.bzl", "scala_library", "scala_test")
+
+scala_library(
+    name = "codepropertygraph",
+    srcs = glob([
+        "src/main/scala/**/*.java",
+        "src/main/scala/**/*.scala",
+    ]),
+    visibility = ["//visibility:public"],
+    deps = [
+        "//schema:domainClasses",
+        "//schema:java_proto",
+        "@maven//:com_google_protobuf_protobuf_java",
+        "@maven//:io_joern_flatgraph_core_3",
+        "@maven//:io_joern_flatgraph_help_3",
+        "@maven//:io_joern_flatgraph_odb_convert_3",
+        "@maven//:net_sf_trove4j_core",
+        "@maven//:org_slf4j_slf4j_api",
+    ],
+)
+
+scala_test(
+    name = "tests",
+    srcs = glob(["src/main/scala/**/*.scala"]),
+    deps = [
+        ":codepropertygraph",
+    ],
+)

codepropertygraph/src/main/scala/io/shiftleft/codepropertygraph/cpgloading/ProtoCpgLoader.scala

@@ -136,7 +136,7 @@ object ProtoCpgLoader {
   def loadOverlays(fileName: String): Try[Iterator[CpgOverlay]] =
     loadOverlays(fileName, CpgOverlay.parseFrom)
 
-  private def loadOverlays[T <: GeneratedMessageV3](fileName: String, f: InputStream => T): Try[Iterator[T]] =
+  private def loadOverlays(fileName: String, f: InputStream => CpgOverlay): Try[Iterator[CpgOverlay]] =
     Using(new ZipArchive(fileName)) { zip =>
       zip.entries
         .sortWith(compareOverlayPath)