1 files changed, 138 insertions, 0 deletions
diff --git a/deno2/deno.gni b/deno2/deno.gni
index 8ccf1015c..61a40de9f 100644
--- a/deno2/deno.gni
+++ b/deno2/deno.gni
@@ -57,3 +57,141 @@ template("create_snapshot") {
     ]
   }
 }
+
+template("rust_crate") {
+  crate_type = invoker.crate_type
+  source_root = invoker.source_root
+  action(target_name) {
+    script = "v8/tools/run.py"
+    depfile = "$target_gen_dir/$target_name.d"
+    sources = [
+      source_root,
+    ]
+    outputs = []
+
+    args = [
+      "rustc",
+      rebase_path(source_root, root_build_dir),
+      "--crate-name=$target_name",
+      "--crate-type=$crate_type",
+      "--emit=dep-info=" + rebase_path(depfile, root_build_dir),
+    ]
+
+    # We only use staticlib for the special "empty" lib.
+    if (crate_type == "staticlib") {
+      staticlib = "$target_out_dir/$target_name.a"
+      outputs += [ staticlib ]
+      args += [ "--emit=link=" + rebase_path(staticlib, root_build_dir) ]
+    }
+
+    if (crate_type == "lib" || crate_type == "bin") {
+      obj = "$target_out_dir/$target_name.o"
+      outputs += [ obj ]
+      args += [ "--emit=obj=" + rebase_path(obj, root_build_dir) ]
+    }
+
+    if (crate_type == "lib") {
+      rlib = "$target_out_dir/$target_name.rlib"
+      outputs += [ rlib ]
+      args += [ "--emit=link=" + rebase_path(rlib, root_build_dir) ]
+    }
+
+    if (defined(invoker.extra_flags)) {
+      args += invoker.extra_flags
+    }
+
+    if (defined(invoker.cfg)) {
+      foreach(c, invoker.cfg) {
+        args += [
+          "--cfg",
+          c,
+        ]
+      }
+    }
+
+    deps = []
+
+    if (defined(invoker.rust_deps)) {
+      foreach(dep_label, invoker.rust_deps) {
+        dep_name = get_label_info(dep_label, "name")
+        dep_dir = get_label_info(dep_label, "target_out_dir")
+        dep_rlib = "$dep_dir/$dep_name.rlib"
+        deps += [ dep_label ]
+        args += [
+          "--extern",
+          "$dep_name=" + rebase_path(dep_rlib, root_build_dir),
+        ]
+      }
+    }
+
+    if (is_debug) {
+      args += [ "-g" ]
+    }
+    if (is_official_build) {
+      args += [ "-O" ]
+    }
+  }
+}
+
+template("rust_library") {
+  rust_crate(target_name) {
+    crate_type = "lib"
+    forward_variables_from(invoker, "*")
+  }
+}
+
+template("rust_executable") {
+  bin_target = target_name + "_bin"
+  exe_deps = invoker.deps
+
+  rust_crate(bin_target) {
+    crate_type = "bin"
+    forward_variables_from(invoker,
+                           [
+                             "source_root",
+                             "cfg",
+                             "rust_deps",
+                           ])
+    forward_variables_from(invoker, "*")
+  }
+  exe_deps += [ ":" + bin_target ]
+
+  # By compiling an empty file as crate-type=staticlib we get all the code
+  # for the rust stdlib, which are not included in the object file outputs
+  # of other libs.
+  stdlib_target = target_name + "_stdlib"
+  rust_crate(stdlib_target) {
+    crate_type = "staticlib"
+    source_root = "empty.rs"
+  }
+  exe_deps += [ ":" + stdlib_target ]
+
+  if (defined(invoker.rust_deps)) {
+    rust_deps = invoker.rust_deps
+  } else {
+    rust_deps = []
+  }
+
+  rust_objs = []
+  rust_objs += get_target_outputs(":" + stdlib_target)
+  rust_objs += get_target_outputs(":" + bin_target)
+  foreach(dep_label, rust_deps) {
+    dep_name = get_label_info(dep_label, "name")
+    dep_dir = get_label_info(dep_label, "target_out_dir")
+    dep_obj = "$dep_dir/$dep_name.o"
+    exe_deps += [ dep_label ]
+    rust_objs += [ dep_obj ]
+  }
+
+  executable(target_name) {
+    ldflags = rebase_path(rust_objs, root_build_dir)
+    if (current_os == "mac") {
+      ldflags += [ "-lresolv" ]
+    }
+    if (current_os == "win") {
+      ldflags += [ "userenv.lib" ]
+    }
+    inputs = rust_objs
+    deps = exe_deps
+  }
+}