add support for Pants v2.29 (#116)

Add support for Pants v2.29 (which just had its `a0` version released).
The main change is that `environment_vars_subset` moved modules so we
need to import from the new location.

Author: tdyas

3rdparty/python/BUILD

@@ -1,3 +1,17 @@
+python_requirements(
+    name="pants-2.29",
+    source="pants-2.29.txt",
+    resolve="pants-2.29",
+    module_mapping={
+        "opentelemetry-proto": ["opentelemetry.proto"],
+        "pantsbuild.pants": ["pants"],
+        "pantsbuild.pants.testutil": ["pants.testutil"],
+    },
+    type_stubs_module_mapping={
+        "types-grpcio": ["grpc"],
+    },
+)
+
 python_requirements(
     name="pants-2.28",
     source="pants-2.28.txt",

3rdparty/python/pants-2.29.lock

@@ -0,0 +1,17 @@
+# Pants dependencies
+pantsbuild.pants==2.29.0a0
+pantsbuild.pants.testutil==2.29.0a0
+
+# OpenTelemetry dependencies
+opentelemetry-api==1.34.1
+opentelemetry-sdk==1.34.1
+opentelemetry-exporter-otlp==1.34.1
+
+# Test dependencies
+pytest
+toml==0.10.2
+httpx==0.28.1
+opentelemetry-proto==1.34.1
+grpcio==1.73.1
+types-grpcio==1.0.0.20250703
+packaging  # match version in Pants repository

3rdparty/python/pants-2.29.txt

@@ -1,5 +1,5 @@
 [GLOBAL]
-pants_version = "2.28.0"
+pants_version = "2.29.0a0"
 backend_packages.add = [
   "pants.backend.build_files.fmt.black",
   "pants.backend.plugin_development",
@@ -18,6 +18,7 @@ pip_version = "25.0"
 default_resolve = "pants-2.28"
 
 [python.resolves]
+"pants-2.29" = "3rdparty/python/pants-2.29.lock"
 "pants-2.28" = "3rdparty/python/pants-2.28.lock"
 "pants-2.27" = "3rdparty/python/pants-2.27.lock"
 "pants-2.26" = "3rdparty/python/pants-2.26.lock"

pants.toml

@@ -14,10 +14,14 @@
 
 PLUGIN_VERSION = "0.4.1"
 
-PANTS_MAJOR_MINOR_VERSIONS = ["2.28", "2.27", "2.26", "2.25"]
+PANTS_MAJOR_MINOR_VERSIONS = ["2.29", "2.28", "2.27", "2.26", "2.25"]
 
 python_sources(
     sources=["*.py", "!*_test.py", "!*_integration_test.py"],
+    **parametrize(
+        "pants-2.29",
+        resolve="pants-2.29",
+    ),
     **parametrize(
         "pants-2.28",
         resolve="pants-2.28",
@@ -39,6 +43,10 @@ python_sources(
 python_tests(
     name="tests",
     sources=["*_test.py", "!*_integration_test.py"],
+    **parametrize(
+        "pants-2.29",
+        resolve="pants-2.29",
+    ),
     **parametrize(
         "pants-2.28",
         resolve="pants-2.28",
@@ -76,6 +84,12 @@ pex_binary(
     entry_point="pants",
     execution_mode="venv",
     layout="zipapp",
+    **parametrize(
+        "pants-2.29",
+        resolve="pants-2.29",
+        dependencies=["3rdparty/python:pants-2.29#pantsbuild.pants"],
+        output_path="pants-2.29.pex",
+    ),
     **parametrize(
         "pants-2.28",
         resolve="pants-2.28",

src/python/shoalsoft/pants_opentelemetry_plugin/BUILD

@@ -254,7 +254,7 @@ def do_test_of_json_file_exporter(
         )
 
 
-@pytest.mark.parametrize("pants_version_str", ["2.28.0", "2.27.0", "2.26.2", "2.25.3"])
+@pytest.mark.parametrize("pants_version_str", ["2.29.0a0", "2.28.0", "2.27.0", "2.26.2", "2.25.3"])
 def test_opentelemetry_integration(subtests, pants_version_str: str) -> None:
     pants_version = Version(pants_version_str)
     pants_major_minor = f"{pants_version.major}.{pants_version.minor}"

src/python/shoalsoft/pants_opentelemetry_plugin/opentelemetry_integration_test.py

@@ -21,7 +21,6 @@
 
 from pants.base.build_root import BuildRoot
 from pants.engine.env_vars import EnvironmentVarsRequest
-from pants.engine.internals.platform_rules import environment_vars_subset
 from pants.engine.rules import collect_rules, implicitly, rule
 from pants.engine.streaming_workunit_handler import (
     WorkunitsCallback,
@@ -41,6 +40,17 @@
 
 logger = logging.getLogger(__name__)
 
+
+try:
+    from pants.core.util_rules.env_vars import (  # type: ignore[import-not-found,unused-ignore]
+        environment_vars_subset,
+    )
+except ImportError:
+    from pants.engine.internals.platform_rules import (  # type: ignore[attr-defined,unused-ignore]
+        environment_vars_subset,
+    )
+
+
 if PANTS_SEMVER >= Version("2.27.0"):
 
     async def get_env_vars(var_names: list[str]):