feat: implement phase 5 bun_bundle bootstrap

2026-03-04 03:30:07 +00:00
parent e36d7a982b
commit b664b15916
7 changed files with 164 additions and 2 deletions
--- a/internal/bun_bundle.bzl
+++ b/internal/bun_bundle.bzl
@@ -1,2 +1,76 @@
-def bun_bundle(**_kwargs):
-    fail("bun_bundle is not implemented yet")
+"""Rule for bundling JS/TS sources with Bun."""
+
+
+def _output_name(target_name, entry):
+    stem = entry.basename.rsplit(".", 1)[0]
+    return "{}__{}.js".format(target_name, stem)
+
+
+def _bun_bundle_impl(ctx):
+    toolchain = ctx.toolchains["//bun:toolchain_type"]
+    bun_bin = toolchain.bun.bun_bin
+
+    transitive_inputs = []
+    if ctx.attr.node_modules:
+        transitive_inputs.append(ctx.attr.node_modules[DefaultInfo].files)
+
+    outputs = []
+    for entry in ctx.files.entry_points:
+        output = ctx.actions.declare_file(_output_name(ctx.label.name, entry))
+        outputs.append(output)
+
+        args = ctx.actions.args()
+        args.add("build")
+        args.add(entry.path)
+        args.add("--outfile")
+        args.add(output.path)
+        args.add("--target")
+        args.add(ctx.attr.target)
+        args.add("--format")
+        args.add(ctx.attr.format)
+        if ctx.attr.minify:
+            args.add("--minify")
+        if ctx.attr.sourcemap:
+            args.add("--sourcemap")
+        for package in ctx.attr.external:
+            args.add("--external")
+            args.add(package)
+
+        ctx.actions.run(
+            executable = bun_bin,
+            arguments = [args],
+            inputs = depset(
+                direct = [entry] + ctx.files.data,
+                transitive = transitive_inputs,
+            ),
+            outputs = [output],
+            mnemonic = "BunBundle",
+            progress_message = "Bundling {} with Bun".format(entry.short_path),
+        )
+
+    return [DefaultInfo(files = depset(outputs))]
+
+
+bun_bundle = rule(
+    implementation = _bun_bundle_impl,
+    attrs = {
+        "entry_points": attr.label_list(
+            mandatory = True,
+            allow_files = [".js", ".ts", ".jsx", ".tsx", ".mjs", ".cjs"],
+        ),
+        "node_modules": attr.label(),
+        "data": attr.label_list(allow_files = True),
+        "target": attr.string(
+            default = "browser",
+            values = ["browser", "node", "bun"],
+        ),
+        "format": attr.string(
+            default = "esm",
+            values = ["esm", "cjs", "iife"],
+        ),
+        "minify": attr.bool(default = False),
+        "sourcemap": attr.bool(default = False),
+        "external": attr.string_list(),
+    },
+    toolchains = ["//bun:toolchain_type"],
+)