bazel: Utilize universal lockfile support

This way, we support multiple platforms and multiple python versions at
the same time.

Author: castler

BUILD.bazel

@@ -1,9 +1,9 @@
 # load("@bazel_gazelle//:def.bzl", "gazelle")
 # load("@pip//:requirements.bzl", "all_whl_requirements")
-# load("@rules_python//python:pip.bzl", "compile_pip_requirements")
 # load("@rules_python_gazelle_plugin//manifest:defs.bzl", "gazelle_python_manifest")
 # load("@rules_python_gazelle_plugin//modules_mapping:def.bzl", "modules_mapping")
 load("@rules_python//python:defs.bzl", "py_binary", "py_library")
+load("@rules_python//python/uv:lock.bzl", "lock")
 load("//:requirements.bzl", "requirement")
 
 # # BUILD.bazel
@@ -45,16 +45,11 @@ load("//:requirements.bzl", "requirement")
 #     pip_repository_name = "pip",
 #     requirements = "requirements_lock_3_9.txt",
 # )
-#
-# # This stanza calls a rule that generates targets for managing pip dependencies
-# # with pip-compile for a particular python version.
-# compile_pip_requirements(
-#     name = "requirements_3_9",
-#     timeout = "moderate",
-#     src = "requirements.in",
-#     requirements_txt = "requirements_lock_3_9.txt",
-#     requirements_windows = "requirements_windows_3_9.txt",
-# )
+lock(
+    name = "python_dependencies",
+    srcs = ["requirements_dev.txt", "requirements.txt"],
+    out = "requirements_lock.txt",
+)
 
 py_library(
     name = "lobster",

MODULE.bazel

@@ -13,36 +13,43 @@ bazel_dep(name = "rules_python_gazelle_plugin", version = "1.5.1")
 
 python = use_extension("@rules_python//python/extensions:python.bzl", "python")
 
+
 python.toolchain(
     is_default = True,
     configure_coverage_tool = True,
     python_version = "3.9",
 )
+python.toolchain(python_version = "3.10")
+python.toolchain(python_version = "3.11")
+python.toolchain(python_version = "3.12")
 
 use_repo(python, "python_versions")
 
+uv = use_extension("@rules_python//python/uv:uv.bzl", "uv")
+uv.configure(version = "0.8.24")
+
 bazel_dep(name = "googletest", version = "1.13.0")
 bazel_dep(name = "trlc", version = "0.0.0")
 
 pip = use_extension("@rules_python//python/extensions:pip.bzl", "pip")
 
-pip.parse(
-    hub_name = "lobster_dependencies",
-    python_version = "3.12",
-    requirements_lock = "//:requirements.txt",
-)
-
-pip.parse(
-    hub_name = "pip",
-    python_version = "3.9",
-    requirements_lock = "//:requirements_lock_3_9.txt",
-    requirements_windows = "//:requirements_windows_3_9.txt",
-)
-
-use_repo(pip, "pip")
+[
+    pip.parse(
+        hub_name = "lobster_pip_hub_dependencies",
+         envsubst = ["PIP_INDEX_URL"],
+        # For all .whl artifacts use the Bazel downloader, allowing caching of artifacts.
+        # Also, the Bazel download approach is supposed to be faster and on top offers parallel downloading.
+        # For sdist packages this will fall back automatically to 'python -m pip --isolated wheel ..', unless we set 'download_only = True'.
+        experimental_index_url = "${PIP_INDEX_URL:-https://pypi.org/simple}",
+        python_version = "3.{}".format(version),
+        requirements_lock = "//:requirements_lock.txt".format(version),
+    )
+    for version in ["9", "10", "11", "12"]
+]
+
+use_repo(pip, "lobster_pip_hub_dependencies")
 
 bazel_dep(name = "gazelle", version = "0.44.0", repo_name = "bazel_gazelle")
-use_repo(python, "python_3_9")
 
 git_override(
     commit = "650b51a47264a4f232b3341f473527710fc32669",