Using cpp_jsonnet as external repo

astgen/BUILD.bazel

@@ -2,7 +2,7 @@ load("@io_bazel_rules_go//go:def.bzl", "go_library")
 
 genrule(
     name = "dumpstdlibast",
-    srcs = ["//cpp-jsonnet/stdlib"],
+    srcs = ["@cpp_jsonnet//stdlib"],
     outs = ["stdast.go"],
     cmd = "./$(location //cmd/dumpstdlibast) \"$<\" > \"$@\"",
     tools = ["//cmd/dumpstdlibast"],

bazel/repositories.bzl

@@ -29,3 +29,10 @@ def jsonnet_go_repositories():
         strip_prefix = "bazel-gazelle-38bd65ead186af23549480d6189b89c7c53c023e",
         urls = ["https://github.com/bazelbuild/bazel-gazelle/archive/38bd65ead186af23549480d6189b89c7c53c023e.zip"],
     )
+    _maybe(
+        http_archive,
+        name = "cpp_jsonnet",
+        sha256 = "fa1a4047942797b7c4ed39718a20d63d1b98725fb5cf563efbc1ecca3375426f",
+        strip_prefix = "jsonnet-0.16.0",
+        urls = ["https://github.com/google/jsonnet/archive/v0.16.0.tar.gz"],
+    )

c-bindings/BUILD.bazel

@@ -18,7 +18,7 @@ go_library(
         "libjsonnet.cpp",
     ],
     cdeps = [
-        "//cpp-jsonnet/include:libjsonnet",
+        "@cpp_jsonnet//include:libjsonnet",
     ],
     cgo = True,
     copts = ["-Wall -Icpp-jsonnet/include"],  # keep