Add nodejs toolchain

.github/workflows/workflow.yaml

@@ -36,6 +36,7 @@ jobs:
               toolchains/python
               toolchains/posix
               toolchains/rust
+              toolchains/nodejs
             )
             for dir in "${dirs[@]}"
             do

nixpkgs/nixpkgs.bzl

@@ -35,6 +35,7 @@ See [examples](/examples/toolchains) for how to use `rules_nixpkgs` with differe
 * [nixpkgs_go_configure](toolchains/go/README.md#nixpkgs_go_configure)
 * [nixpkgs_rust_configure](#nixpkgs_rust_configure)
 * [nixpkgs_sh_posix_configure](#nixpkgs_sh_posix_configure)
+* [nixpkgs_nodejs_configure](#nixpkgs_nodejs_configure)
 
 ## Setup
 
@@ -144,6 +145,10 @@ load(
     "@rules_nixpkgs_posix//:posix.bzl",
     _nixpkgs_sh_posix_configure = "nixpkgs_sh_posix_configure",
 )
+load(
+    "@rules_nixpkgs_nodejs//:nodejs.bzl",
+    _nixpkgs_nodejs_configure = "nixpkgs_nodejs_configure",
+)
 
 # aliases for backwards compatibility prior to `bzlmod`
 nixpkgs_git_repository = _nixpkgs_git_repository
@@ -154,6 +159,7 @@ nixpkgs_java_configure = _nixpkgs_java_configure
 nixpkgs_cc_configure = _nixpkgs_cc_configure
 nixpkgs_rust_configure = _nixpkgs_rust_configure
 nixpkgs_sh_posix_configure = _nixpkgs_sh_posix_configure
+nixpkgs_nodejs_configure = _nixpkgs_nodejs_configure
 
 def nixpkgs_cc_autoconf_impl(repository_ctx):
     cpu_value = get_cpu_value(repository_ctx)

nixpkgs/repositories.bzl

@@ -57,6 +57,7 @@ def rules_nixpkgs_dependencies(rules_nixpkgs_name = "io_tweag_rules_nixpkgs"):
         ("rules_nixpkgs_go", "toolchains/go"),
         ("rules_nixpkgs_rust", "toolchains/rust"),
         ("rules_nixpkgs_posix", "toolchains/posix"),
+        ("rules_nixpkgs_nodejs", "toolchains/nodejs"),
     ]:
         # case analysis in inner loop to reduce code duplication
         if kind == "local_repository":

toolchains/nodejs/.bazelrc

@@ -0,0 +1 @@
+../../core/.bazelrc

toolchains/nodejs/BUILD.bazel

@@ -0,0 +1,17 @@
+load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
+
+package(default_visibility = ["//visibility:public"])
+
+filegroup(
+    name = "srcs",
+    srcs = glob(["**"]),
+    visibility = ["//visibility:public"],
+)
+
+bzl_library(
+    name = "nodejs",
+    srcs = ["//:nodejs.bzl"],
+    deps = [
+        "@rules_nixpkgs_core//:nixpkgs",
+    ],
+)

toolchains/nodejs/MODULE.bazel

@@ -0,0 +1,8 @@
+module(
+    name = "rules_nixpkgs_nodejs",
+    version = "0.8.1",
+)
+
+bazel_dep(name = "rules_nixpkgs_core", version = "0.8.1")
+# TODO: the version of `rules_nodejs` on BCR is quite old
+# bazel_dep(name = "rules_nodejs", version = "5.4.0")

toolchains/nodejs/WORKSPACE

@@ -0,0 +1,39 @@
+# NOTE: temporary boilerplate for compatibility with `WORKSPACE` setup!
+# TODO: remove when migration to `bzlmod` is complete
+
+### generic dependencies for rendering documentation
+
+local_repository(
+    name = "io_tweag_rules_nixpkgs",
+    path = "../..",
+)
+
+load("@io_tweag_rules_nixpkgs//nixpkgs:repositories.bzl", "rules_nixpkgs_dependencies")
+
+rules_nixpkgs_dependencies()
+
+load("@rules_nixpkgs_core//docs:dependencies_1.bzl", "docs_dependencies_1")
+
+docs_dependencies_1()
+
+load("@rules_nixpkgs_core//docs:dependencies_2.bzl", "docs_dependencies_2")
+
+docs_dependencies_2()
+
+### end generic dependencies for rendering documentation
+
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+http_archive(
+    name = "build_bazel_rules_nodejs",
+    sha256 = "2b2004784358655f334925e7eadc7ba80f701144363df949b3293e1ae7a2fb7b",
+    urls = ["https://github.com/bazelbuild/rules_nodejs/releases/download/5.4.0/rules_nodejs-5.4.0.tar.gz"],
+)
+
+load("//:nodejs.bzl", "nixpkgs_nodejs_configure")
+
+nixpkgs_nodejs_configure(repository = "@nixpkgs")
+
+load("@build_bazel_rules_nodejs//:repositories.bzl", "build_bazel_rules_nodejs_dependencies")
+
+build_bazel_rules_nodejs_dependencies()

toolchains/nodejs/docs/BUILD.bazel

@@ -0,0 +1,8 @@
+# load("@rules_nixpkgs_core//docs:stardoc.bzl", "generate_documentation")
+#
+# generate_documentation(
+#     name = "README.md",
+#     input = "//:nodejs.bzl",
+#     symbol_names = ["nixpkgs_nodejs_configure"],
+#     deps = ["//:nodejs"],
+# )

toolchains/nodejs/nodejs.bzl

@@ -0,0 +1,107 @@
+load("@rules_nixpkgs_core//:nixpkgs.bzl", "nixpkgs_package")
+load("@rules_nixpkgs_core//:util.bzl", "ensure_constraints")
+
+_nodejs_nix_content = """\
+let
+    pkgs = import <nixpkgs> {{ config = {{}}; overlays = []; }};
+    nodejs = pkgs.{attribute_path};
+in
+pkgs.buildEnv {{
+  extraOutputsToInstall = ["out" "bin" "lib"];
+  name = "bazel-nodejs-toolchain";
+  paths  = [ nodejs ];
+  postBuild = ''
+    touch $out/ROOT
+    cat <<EOF > $out/BUILD
+
+    filegroup(
+        name = "nodejs",
+        srcs = ["bin/node"],
+        visibility = ["//visibility:public"],
+    )
+
+    load("@rules_nodejs//nodejs:toolchain.bzl", "node_toolchain")
+    node_toolchain(
+        name = "nodejs_nix_impl",
+        target_tool = ":nodejs",
+        visibility = ["//visibility:public"],
+    )
+
+    EOF
+  '';
+}}
+"""
+
+_nodejs_nix_toolchain = """
+toolchain(
+    name = "nodejs_nix",
+    toolchain = "@{toolchain_repo}//:nodejs_nix_impl",
+    toolchain_type = "@rules_nodejs//nodejs:toolchain_type",
+    exec_compatible_with = {exec_constraints},
+    target_compatible_with = {target_constraints},
+)
+"""
+
+def _nixpkgs_nodejs_toolchain_impl(repository_ctx):
+    exec_constraints, target_constraints = ensure_constraints(repository_ctx)
+    repository_ctx.file(
+        "BUILD.bazel",
+        executable = False,
+        content = _nodejs_nix_toolchain.format(
+            toolchain_repo = repository_ctx.attr.toolchain_repo,
+            exec_constraints = exec_constraints,
+            target_constraints = target_constraints,
+        ),
+    )
+
+_nixpkgs_nodejs_toolchain = repository_rule(
+  _nixpkgs_nodejs_toolchain_impl,
+  attrs = {
+    "toolchain_repo": attr.string(),
+    "exec_constraints": attr.string_list(),
+    "target_constraints": attr.string_list(),
+  },
+)
+
+def nixpkgs_nodejs_configure(
+  name = "nixpkgs_nodejs",
+  attribute_path = "nodejs",
+  repository = None,
+  repositories = {},
+  nix_file = None,
+  nix_file_content = None,
+  nix_file_deps = None,
+  nixopts = [],
+  fail_not_supported = True,
+  quiet = False,
+  exec_constraints = None,
+  target_constraints = None,
+):
+    if attribute_path == None:
+        fail("'attribute_path' is required.", "attribute_path")
+
+    if not nix_file and not nix_file_content:
+      nix_file_content = _nodejs_nix_content.format(
+        attribute_path = attribute_path,
+      )
+
+    nixpkgs_package(
+        name = name,
+        repository = repository,
+        repositories = repositories,
+        nix_file = nix_file,
+        nix_file_deps = nix_file_deps,
+        nix_file_content = nix_file_content,
+        nixopts = nixopts,
+        fail_not_supported = fail_not_supported,
+        quiet = quiet,
+    )
+
+    _nixpkgs_nodejs_toolchain(
+      name = "{}_toolchain".format(name),
+      toolchain_repo = name,
+      exec_constraints = exec_constraints,
+      target_constraints = target_constraints,
+    )
+
+    native.register_toolchains("@{}_toolchain//:nodejs_nix".format(name))

toolchains/nodejs/tests/BUILD.bazel

@@ -0,0 +1,8 @@
+load("@build_bazel_rules_nodejs//:index.bzl", "nodejs_binary")
+
+package(default_testonly = 1)
+
+nodejs_binary(
+    name = "nodejs-test",
+    entry_point = ":nodejs-test.js",
+)

toolchains/nodejs/tests/nodejs-test.js

@@ -0,0 +1,5 @@
+function main() {
+  console.log("Hello world");
+}
+
+main()