Rust: bazel packaging

rust/tools/BUILD.bazel

@@ -0,0 +1,9 @@
+load("//misc/bazel:pkg.bzl", "codeql_pkg_files")
+
+codeql_pkg_files(
+    name = "tools",
+    exes = [
+        "index.sh",
+    ],
+    visibility = ["//rust:__pkg__"],
+)

rust/tools/index.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+# TODO move this to rust code
+
+inputs=($(find -name Cargo.toml))
+
+if [ "${#inputs}" -eq 0 ]; then
+  inputs=($(find -name rust-project.json))
+  if [ "${#inputs}" -eq 0 ]; then
+    inputs=($(find -name '*.rs'))
+    if [ "${#inputs}" -eq 0 ]; then
+      echo "no source files found" >&2
+      exit 1
+    fi
+  fi
+fi
+
+exec "$CODEQL_EXTRACTOR_RUST_ROOT/tools/$CODEQL_PLATFORM/extractor" "${inputs[@]}"