Refactor snapshot build (#2825)

Instead of using core/snapshot_creator.rs, instead two crates are
introduced which allow building the snapshot during build.rs.

Rollup is removed and replaced with our own bundler. This removes
the Node build dependency. Modules in //js now use Deno-style imports
with file extensions, rather than Node style extensionless imports.

This improves incremental build time when changes are made to //js files
by about 40 seconds.

1 files changed, 0 insertions, 65 deletions

diff --git a/cli/deno.gni b/cli/deno.gni
deleted file mode 100644
index dabcd43ca..000000000
--- a/cli/deno.gni
+++ /dev/null
@@ -1,65 +0,0 @@
-# Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
-import("//build/compiled_action.gni")
-
-# Tempalte to generate a Rollup bundle of code.
-template("bundle") {
-  action(target_name) {
-    forward_variables_from(invoker, "*")
-    script = "//tools/run_node.py"
-    outputs = [
-      out_dir + out_name + ".js",
-      out_dir + out_name + ".js.map",
-    ]
-    inputs = [
-      "//js/" + out_name + ".ts",
-      "//rollup.config.js",
-    ]
-    depfile = out_dir + out_name + ".d"
-    args = [
-      rebase_path("//third_party/node_modules/rollup/bin/rollup",
-                  root_build_dir),
-      "-c",
-      rebase_path("//rollup.config.js", root_build_dir),
-      "-i",
-      rebase_path(inputs[0], root_build_dir),
-      "-o",
-      rebase_path(outputs[0], root_build_dir),
-      "--sourcemapFile",
-      rebase_path("."),
-      "--silent",
-    ]
-  }
-}
-
-template("run_node") {
-  action(target_name) {
-    forward_variables_from(invoker, "*")
-    script = "//tools/run_node.py"
-  }
-}
-
-# Template to generate different V8 snapshots based on different runtime flags.
-template("snapshot") {
-  compiled_action(target_name) {
-    forward_variables_from(invoker,
-                           [
-                             "testonly",
-                             "deps",
-                           ])
-    tool = "//core:snapshot_creator"
-    visibility = [ ":*" ]  # Only targets in this file can depend on this.
-    snapshot_out_bin = "$target_gen_dir/$target_name.bin"
-    inputs = [
-      invoker.source_root,
-    ]
-
-    outputs = [
-      snapshot_out_bin,
-    ]
-    args = rebase_path(outputs, root_build_dir) +
-           rebase_path(inputs, root_build_dir)
-
-    # To debug snapshotting problems:
-    #  args += ["--trace-serializer"]
-  }
-}