refactor nodejs build code

nodejs/BUILD

@@ -1,4 +1,4 @@
-load(":config.bzl", "NODEJS_ARCHITECTURES", "NODEJS_DISTROS", "NODEJS_MAJOR_VERSIONS")
+load(":config.bzl", "NODEJS_ARCHITECTURES", "NODEJS_DISTROS", "NODEJS_MAJOR_VERSIONS", "NODEJS_PACKAGES")
 load(":nodejs.bzl", "nodejs_image", "nodejs_image_index")
 
 package(default_visibility = ["//visibility:public"])
@@ -8,6 +8,7 @@ package(default_visibility = ["//visibility:public"])
         arch = arch,
         distro = distro,
         major_version = major_version,
+        packages = NODEJS_PACKAGES[major_version],
     )
     for distro in NODEJS_DISTROS
     for major_version in NODEJS_MAJOR_VERSIONS

nodejs/config.bzl

@@ -7,3 +7,11 @@ NODEJS_ARCHITECTURES = {
     },
 }
 NODEJS_MAJOR_VERSIONS = ["22", "24", "26"]
+
+NODEJS_PACKAGES = {
+    "22": [],
+    "24": [],
+    "26": [
+        "libatomic1",
+    ],
+}

nodejs/nodejs.bzl

@@ -35,30 +35,28 @@ def _check_certificates_tar():
         srcs = ["testdata/check_certificate.js"],
     )
 
-def nodejs_image(distro, major_version, arch):
+def nodejs_image(distro, major_version, arch, packages):
     """nodejs and debug image with tests.
 
     Args:
         distro: name of distribution
         major_version: version of nodejs
         arch: the target arch
+        packages: any deb packages to add to the image
     """
 
-    # node 26 and later dynamically link libatomic.so.1, which isn't in the cc base image.
-    # Layer libatomic1 onto the nodejs26+ images only so we don't bloat other images.
-    extra_tars = []
-    if int(major_version) >= 26:
-        extra_tars = [deb.package(arch, distro, "libatomic1")]
-
     for mode in DEBUG_MODE:
         for user in USERS:
             oci_image(
                 name = "nodejs" + major_version + mode + "_" + user + "_" + arch + "_" + distro,
                 base = "//cc:cc" + mode + "_" + user + "_" + arch + "_" + distro,
                 entrypoint = ["/nodejs/bin/node"],
                 tars = [
+                    deb.package(arch, distro, pkg)
+                    for pkg in packages
+                ] + [
                     "@nodejs" + major_version + "_" + arch,
-                ] + extra_tars,
+                ],
             )
 
     _check_certificates_tar()