feat: add phase 6 js_library and ts_library bootstrap

internal/bun_bundle.bzl

@@ -1,5 +1,7 @@
 """Rule for bundling JS/TS sources with Bun."""
 
+load("//internal:js_library.bzl", "BunSourcesInfo")
+
 
 def _output_name(target_name, entry):
     stem = entry.basename.rsplit(".", 1)[0]
@@ -13,6 +15,11 @@ def _bun_bundle_impl(ctx):
     transitive_inputs = []
     if ctx.attr.node_modules:
         transitive_inputs.append(ctx.attr.node_modules[DefaultInfo].files)
+    for dep in ctx.attr.deps:
+        if BunSourcesInfo in dep:
+            transitive_inputs.append(dep[BunSourcesInfo].transitive_sources)
+        else:
+            transitive_inputs.append(dep[DefaultInfo].files)
 
     outputs = []
     for entry in ctx.files.entry_points:
@@ -59,6 +66,7 @@ bun_bundle = rule(
             allow_files = [".js", ".ts", ".jsx", ".tsx", ".mjs", ".cjs"],
         ),
         "node_modules": attr.label(),
+        "deps": attr.label_list(),
         "data": attr.label_list(allow_files = True),
         "target": attr.string(
             default = "browser",

internal/bun_test.bzl

@@ -1,5 +1,7 @@
 """Rule for running test suites with Bun."""
 
+load("//internal:js_library.bzl", "BunSourcesInfo")
+
 
 def _shell_quote(value):
     return "'" + value.replace("'", "'\"'\"'") + "'"
@@ -34,6 +36,11 @@ exec "{bun_bin}" test {src_args} "${{extra_args[@]}}" "$@"
     transitive_files = []
     if ctx.attr.node_modules:
         transitive_files.append(ctx.attr.node_modules[DefaultInfo].files)
+    for dep in ctx.attr.deps:
+        if BunSourcesInfo in dep:
+            transitive_files.append(dep[BunSourcesInfo].transitive_sources)
+        else:
+            transitive_files.append(dep[DefaultInfo].files)
 
     runfiles = ctx.runfiles(
         files = [bun_bin] + ctx.files.srcs + ctx.files.data,
@@ -56,6 +63,7 @@ bun_test = rule(
             allow_files = [".js", ".ts", ".jsx", ".tsx", ".mjs", ".cjs"],
         ),
         "node_modules": attr.label(),
+        "deps": attr.label_list(),
         "data": attr.label_list(allow_files = True),
     },
     test = True,

internal/js_library.bzl

@@ -0,0 +1,40 @@
+"""Lightweight JS/TS source grouping rules."""
+
+BunSourcesInfo = provider(fields = ["transitive_sources"])
+
+
+def _bun_library_impl(ctx):
+    transitive_sources = [
+        dep[BunSourcesInfo].transitive_sources
+        for dep in ctx.attr.deps
+        if BunSourcesInfo in dep
+    ]
+    all_sources = depset(
+        direct = ctx.files.srcs,
+        transitive = transitive_sources,
+    )
+    return [
+        BunSourcesInfo(transitive_sources = all_sources),
+        DefaultInfo(files = all_sources),
+    ]
+
+
+js_library = rule(
+    implementation = _bun_library_impl,
+    attrs = {
+        "srcs": attr.label_list(
+            allow_files = [".js", ".jsx", ".mjs", ".cjs"],
+        ),
+        "deps": attr.label_list(),
+    },
+)
+
+ts_library = rule(
+    implementation = _bun_library_impl,
+    attrs = {
+        "srcs": attr.label_list(
+            allow_files = [".ts", ".tsx"],
+        ),
+        "deps": attr.label_list(),
+    },
+)