Separate deno.gni and rust.gni and clean up.

Put rust depfile in target_out_dir because the depfile isn't in the
outputs, the gen directory doesn't get created.

Prefix rlib files with lib.

1 files changed, 136 insertions, 0 deletions

diff --git a/rust.gni b/rust.gni
new file mode 100644
index 000000000..218ab1299
--- /dev/null
+++ b/rust.gni
@@ -0,0 +1,136 @@
+template("rust_crate") {
+  action(target_name) {
+    forward_variables_from(invoker,
+                           [
+                             "cfg",
+                             "crate_type",
+                             "source_root",
+                             "deps",
+                             "rust_deps",
+                           ])
+    sources = [
+      source_root,
+    ]
+    outputs = []
+    depfile = "$target_out_dir/$target_name.d"
+    script = "//third_party/v8/tools/run.py"
+
+    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 == "rlib" || crate_type == "bin") {
+      obj = "$target_out_dir/$target_name.o"
+      outputs += [ obj ]
+      args += [ "--emit=obj=" + rebase_path(obj, root_build_dir) ]
+    }
+
+    if (crate_type == "rlib") {
+      rlib = "$target_out_dir/lib$target_name.rlib"
+      outputs += [ rlib ]
+      args += [ "--emit=link=" + rebase_path(rlib, root_build_dir) ]
+    }
+
+    if (is_debug) {
+      args += [ "-g" ]
+    }
+
+    if (is_official_build) {
+      args += [ "-O" ]
+    }
+
+    if (defined(cfg)) {
+      foreach(c, cfg) {
+        args += [
+          "--cfg",
+          c,
+        ]
+      }
+    }
+
+    if (!defined(deps)) {
+      deps = []
+    }
+
+    if (defined(rust_deps)) {
+      deps += rust_deps
+      foreach(dep_label, rust_deps) {
+        dep_name = get_label_info(dep_label, "name")
+        dep_dir = get_label_info(dep_label, "target_out_dir")
+        dep_rlib = "$dep_dir/lib$dep_name.rlib"
+        args += [
+          "--extern",
+          "$dep_name=" + rebase_path(dep_rlib, root_build_dir),
+        ]
+      }
+    }
+  }
+}
+
+template("rust_library") {
+  rust_crate(target_name) {
+    crate_type = "rlib"
+    forward_variables_from(invoker, "*")
+  }
+}
+
+template("rust_executable") {
+  bin_target = target_name + "_bin"
+  rust_crate(bin_target) {
+    crate_type = "bin"
+    forward_variables_from(invoker, "*")
+  }
+
+  # By compiling an empty file as crate-type=staticlib we get all the code
+  # for the rust stdlib, which are not included in the object file outputs
+  # of other libs.
+  stdlib_target = target_name + "_stdlib"
+  rust_crate(stdlib_target) {
+    crate_type = "staticlib"
+    source_root = "src/empty.rs"
+  }
+
+  executable(target_name) {
+    forward_variables_from(invoker, "*")
+
+    if (!defined(deps)) {
+      deps = []
+    }
+
+    deps += [
+      ":" + bin_target,
+      ":" + stdlib_target,
+    ]
+
+    libs = get_target_outputs(":" + bin_target) +
+           get_target_outputs(":" + stdlib_target)
+
+    if (defined(rust_deps)) {
+      deps += rust_deps
+      foreach(dep_label, rust_deps) {
+        dep_name = get_label_info(dep_label, "name")
+        dep_dir = get_label_info(dep_label, "target_out_dir")
+        dep_obj = "$dep_dir/$dep_name.o"
+        libs += [ dep_obj ]
+      }
+    }
+
+    if (current_os == "mac") {
+      libs += [ "resolv" ]
+    }
+    if (current_os == "win") {
+      libs += [ "userenv.lib" ]
+    }
+  }
+}