Adds pkg_repo example

examples/pkg_repo/.bazelversion

@@ -0,0 +1 @@
+6.4.0

examples/pkg_repo/BUILD.bazel

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+load("@rules_python//python:defs.bzl", "py_binary")
+
+py_binary(
+    name = "ipython",
+    srcs = ["ipython.py"],
+    deps = [
+        "@pdm//:ipython",
+    ],
+)

examples/pkg_repo/WORKSPACE

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+workspace(
+    name = "jvolkman_rules_pycross_example",
+)
+
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+http_archive(
+    name = "rules_python",
+    sha256 = "9acc0944c94adb23fba1c9988b48768b1bacc6583b52a2586895c5b7491e2e31",
+    strip_prefix = "rules_python-0.27.0",
+    url = "https://github.com/bazelbuild/rules_python/releases/download/0.27.0/rules_python-0.27.0.tar.gz",
+)
+
+load("@rules_python//python:repositories.bzl", "py_repositories", "python_register_multi_toolchains")
+
+py_repositories()
+
+python_register_multi_toolchains(
+    name = "python",
+    default_version = "3.12",
+    python_versions = [
+        "3.10",
+        "3.11",
+        "3.12",
+    ],
+)
+
+load("@python//3.12:defs.bzl", python_interpreter = "interpreter")
+
+local_repository(
+    name = "jvolkman_rules_pycross",
+    path = "../..",
+)
+
+load("@jvolkman_rules_pycross//pycross:repositories.bzl", "rules_pycross_dependencies")
+
+rules_pycross_dependencies(
+    python_interpreter_target = python_interpreter,
+)
+
+load(
+    "@jvolkman_rules_pycross//pycross:defs.bzl",
+    "pkg_repo_model_pdm",
+    "pycross_pkg_repo",
+    "pycross_register_for_python_toolchains",
+)
+
+pycross_register_for_python_toolchains(
+    name = "pycross_toolchains",
+    python_toolchains_repo_name = "python",
+)
+
+load("@pycross_toolchains//:defs.bzl", "environments")
+
+pycross_pkg_repo(
+    name = "pdm",
+    lock_model = pkg_repo_model_pdm(
+        lock_file = "@//:pdm.lock",
+        project_file = "@//:pyproject.toml",
+    ),
+    target_environments = environments,
+)
+
+load("@pdm//:defs.bzl", "install_deps")
+
+install_deps()

examples/pkg_repo/ipython.py

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+from IPython import start_ipython
+
+start_ipython()

examples/pkg_repo/pyproject.toml

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+[project]
+dependencies = [
+    "ipython>=8.17",
+]
+requires-python = ">=3.10"