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, 43 insertions, 0 deletions

diff --git a/cli_snapshots/lib.rs b/cli_snapshots/lib.rs
new file mode 100644
index 000000000..1147e7903
--- /dev/null
+++ b/cli_snapshots/lib.rs
@@ -0,0 +1,43 @@
+pub static CLI_SNAPSHOT: &[u8] =
+  include_bytes!(concat!(env!("OUT_DIR"), "/CLI_SNAPSHOT.bin"));
+pub static CLI_SNAPSHOT_MAP: &[u8] =
+  include_bytes!(concat!(env!("OUT_DIR"), "/CLI_SNAPSHOT.js.map"));
+pub static CLI_SNAPSHOT_DTS: &[u8] =
+  include_bytes!(concat!(env!("OUT_DIR"), "/CLI_SNAPSHOT.d.ts"));
+
+pub static COMPILER_SNAPSHOT: &[u8] =
+  include_bytes!(concat!(env!("OUT_DIR"), "/COMPILER_SNAPSHOT.bin"));
+pub static COMPILER_SNAPSHOT_MAP: &[u8] =
+  include_bytes!(concat!(env!("OUT_DIR"), "/COMPILER_SNAPSHOT.js.map"));
+pub static COMPILER_SNAPSHOT_DTS: &[u8] =
+  include_bytes!(concat!(env!("OUT_DIR"), "/COMPILER_SNAPSHOT.d.ts"));
+
+#[test]
+fn cli_snapshot() {
+  let mut isolate =
+    deno::Isolate::new(deno::StartupData::Snapshot(CLI_SNAPSHOT), false);
+  deno::js_check(isolate.execute(
+    "<anon>",
+    r#"
+      if (!window) {
+        throw Error("bad");
+      }
+      console.log("we have console.log!!!");
+    "#,
+  ));
+}
+
+#[test]
+fn compiler_snapshot() {
+  let mut isolate =
+    deno::Isolate::new(deno::StartupData::Snapshot(COMPILER_SNAPSHOT), false);
+  deno::js_check(isolate.execute(
+    "<anon>",
+    r#"
+      if (!compilerMain) {
+        throw Error("bad");
+      }
+      console.log(`ts version: ${ts.version}`);
+    "#,
+  ));
+}