Updated system_python to tolerate the case where a system python is not available.
PiperOrigin-RevId: 443773186
diff --git a/bazel/system_python.bzl b/bazel/system_python.bzl
index 9e20b1f..6434354 100644
--- a/bazel/system_python.bzl
+++ b/bazel/system_python.bzl
@@ -62,11 +62,17 @@
py_program = "import sysconfig; print(sysconfig.get_config_var('%s'), end='')"
result = repository_ctx.execute(["python3", "-c", py_program % (name)])
if result.return_code != 0:
- fail("No python3 executable available on the system")
+ return None
return result.stdout
def _python_headers_impl(repository_ctx):
path = _get_config_var(repository_ctx, "INCLUDEPY")
+ if not path:
+ # buildifier: disable=print
+ print("WARNING: no system python available, builds against system python will fail")
+ repository_ctx.file("BUILD.bazel", "")
+ repository_ctx.file("version.bzl", "SYSTEM_PYTHON_VERSION = None")
+ return
repository_ctx.symlink(path, "python")
python3 = repository_ctx.which("python3")
python_version = _get_python_version(repository_ctx)
