feat: add --subpackage option to update multiple derivations

README.md

@@ -197,6 +197,57 @@ Arguments can be passed to `nix-shell maintainers/scripts/update.nix` like so
 $ nix-update sbt --use-update-script --update-script-args "--argstr skip-prompt true"
 ```
 
+## Subpackages
+
+Some packages consist of multiple fixed-output derivations derived from the same upstream source.
+For example, a Go project with Go module dependencies might also include a JavaScript project with npm dependencies.
+
+To support such use cases, `nix-update` allows specifying subpackages directly in the command line.
+Consider a package accessible via the `some-package` attribute, which also provides a second fixed-output derivation as a subpackage named `web-ui`:
+
+```nix
+{
+  buildGoModule,
+  fetchFromGitHub,
+  buildNpmPackage,
+}:
+
+let
+  pname = "some-package";
+  version = "1.53.0";
+  src = fetchFromGitHub {
+    owner = "owner";
+    repo = "repo";
+    rev = "v${version}";
+    hash = "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";
+  };
+
+  web-ui = buildNpmPackage rec {
+    ...
+    npmDepsHash = "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";
+  };
+in
+buildGoModule rec {
+  inherit
+    web-ui
+    pname
+    version
+    src;
+
+  vendorHash = "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";
+
+  preBuild = ''
+    cp -r ${web-ui}/* web/dist
+  '';
+}
+```
+
+You can update the package and its subpackage using `nix-update` as follows:
+
+```
+nix-update --sub-packages web-ui some-package  # sub-package can be repeated
+```
+
 ## Development setup
 
 First clone the repo to your preferred location (in the following, we assume

nix_update/__init__.py

@@ -107,6 +107,13 @@ def parse_args(args: list[str]) -> Options:
         help="Path to the directory containing the metadata (e.g. Cargo.toml) referenced by the lockfile",
         default=".",
     )
+    parser.add_argument(
+        "-s",
+        "--subpackage",
+        action="append",
+        help="Attribute for a subpackage that nix-update should try to get hashes for",
+        default=None,
+    )
 
     a = parser.parse_args(args)
     return Options(
@@ -116,6 +123,7 @@ def parse_args(args: list[str]) -> Options:
         commit=a.commit,
         use_update_script=a.use_update_script,
         update_script_args=a.update_script_args,
+        subpackages=a.subpackage,
         url=a.url,
         write_commit_message=a.write_commit_message,
         run=a.run,

nix_update/options.py

@@ -13,6 +13,7 @@ class Options:
     version_preference: VersionPreference = VersionPreference.STABLE
     version_regex: str = "(.*)"
     import_path: str = os.getcwd()
+    subpackages: list[str] | None = None
     override_filename: str | None = None
     url: str | None = None
     commit: bool = False

nix_update/update.py

@@ -9,6 +9,7 @@
 import tomllib
 from concurrent.futures import ThreadPoolExecutor
 from contextlib import contextmanager
+from copy import deepcopy
 from os import path
 from pathlib import Path
 
@@ -505,6 +506,18 @@ def update(opts: Options) -> Package:
     if package.hash and update_hash:
         update_src_hash(opts, package.filename, package.hash)
 
+    if opts.subpackages:
+        for subpackage in opts.subpackages:
+            info(f"Updating subpackage {subpackage}")
+            subpackage_opts = deepcopy(opts)
+            subpackage_opts.attribute += f".{subpackage}"
+            # Update escaped package attribute
+            subpackage_opts.__post_init__()
+            subpackage_opts.subpackages = None
+            # Do not update the version number since that's already been done
+            subpackage_opts.version_preference = VersionPreference.SKIP
+            update(subpackage_opts)
+
     # if no package.hash was provided we just update the other hashes unconditionally
     if update_hash or not package.hash:
         if package.go_modules:

tests/test_subpackage.py

@@ -0,0 +1,42 @@
+import subprocess
+
+import conftest
+
+from nix_update.options import Options
+from nix_update.update import update
+
+
+def test_update(helpers: conftest.Helpers) -> None:
+    with helpers.testpkgs() as path:
+        opts = Options(
+            attribute="subpackage", subpackages=["autobrr-web"], import_path=str(path)
+        )
+        update(opts)
+
+        def get_attr(attr: str) -> str:
+            return subprocess.run(
+                [
+                    "nix",
+                    "eval",
+                    "--raw",
+                    "--extra-experimental-features",
+                    "nix-command",
+                    "-f",
+                    path,
+                    attr,
+                ],
+                text=True,
+                stdout=subprocess.PIPE,
+            ).stdout.strip()
+
+        subpackage_hash = get_attr("subpackage.autobrr-web.pnpmDeps.outputHash")
+        assert subpackage_hash != "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA="
+
+        src_hash = get_attr("subpackage.src.outputHash")
+        assert src_hash != "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA="
+
+        gomodules_hash = get_attr("subpackage.goModules.outputHash")
+        assert gomodules_hash != "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA="
+
+        version = get_attr("subpackage.version")
+        assert tuple(map(int, version.split("."))) >= (1, 53, 0)

tests/testpkgs/default.nix

@@ -33,4 +33,5 @@
   mix = pkgs.callPackage ./mix.nix { };
   set = pkgs.callPackage ./set.nix { };
   let-bound-version = pkgs.callPackage ./let-bound-version.nix { };
+  subpackage = pkgs.callPackage ./subpackage.nix { };
 }

tests/testpkgs/subpackage.nix

@@ -0,0 +1,64 @@
+{
+  buildGoModule,
+  fetchFromGitHub,
+  stdenvNoCC,
+  nodejs,
+  pnpm_9,
+  typescript,
+}:
+
+let
+  pname = "autobrr";
+  version = "1.53.0";
+  src = fetchFromGitHub {
+    owner = "autobrr";
+    repo = "autobrr";
+    rev = "v${version}";
+    hash = "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";
+  };
+
+  autobrr-web = stdenvNoCC.mkDerivation {
+    pname = "${pname}-web";
+    inherit src version;
+
+    nativeBuildInputs = [
+      nodejs
+      pnpm_9.configHook
+      typescript
+    ];
+
+    sourceRoot = "${src.name}/web";
+
+    pnpmDeps = pnpm_9.fetchDeps {
+      inherit (autobrr-web)
+        pname
+        version
+        src
+        sourceRoot
+        ;
+      hash = "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";
+    };
+
+    postBuild = ''
+      pnpm run build
+    '';
+
+    installPhase = ''
+      cp -r dist $out
+    '';
+  };
+in
+buildGoModule rec {
+  inherit
+    autobrr-web
+    pname
+    version
+    src
+    ;
+
+  vendorHash = "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";
+
+  preBuild = ''
+    cp -r ${autobrr-web}/* web/dist
+  '';
+}