feat: add orion plugin to generate js_binary for main.{js,ts} (#368)

Author: jbedard

pnpm-workspaces/.aspect/cli/config.yaml

@@ -1,3 +1,5 @@
 configure:
   languages:
     javascript: true
+  plugins:
+    - .aspect/cli/main.star

pnpm-workspaces/.aspect/cli/main.star

@@ -0,0 +1,39 @@
+# TODO: delete when all rules_js rules added to aspect-cli
+aspect.register_rule_kind("js_binary", {
+    "From": "@aspect_rules_js//js:defs.bzl",
+    "MergeableAttrs": ["data"],
+    "ResolveAttrs": ["entry_point", "data"],
+})
+
+def declare_main_js(ctx):
+    if len(ctx.sources) == 0:
+        ctx.targets.remove("main")
+        return
+
+    entry_point = ctx.sources[0].path.replace(".ts", ".js")
+
+    ctx.targets.add(
+        name = "main",
+        kind = "js_binary",
+        attrs = {
+            # The entry point file
+            "entry_point": entry_point,
+            "data": [
+                aspect.Label(
+                    pkg = ctx.rel,
+                    name = "tsc",
+                ),
+            ],
+        },
+    )
+
+aspect.register_configure_extension(
+    id = "main_js",
+    prepare = lambda _: aspect.PrepareResult(
+        sources = [
+            aspect.SourceGlobs("**/main.ts"),
+            aspect.SourceGlobs("**/main.js"),
+        ],
+    ),
+    declare = declare_main_js,
+)

pnpm-workspaces/apps/alpha/BUILD.bazel

@@ -26,6 +26,6 @@ js_library(
 
 js_binary(
     name = "main",
-    data = [":pkg"],
+    data = [":tsc"],
     entry_point = "src/main.js",
 )