make it easier to test path locally, reenable output

ci/scripts/nanoarrow_build.sh

@@ -46,16 +46,7 @@ set -x
 mkdir -p ${build_dir}
 pushd ${build_dir}
 
-# Build nanoarrow C Data integration tests
-mkdir -p cdata && pushd cdata
 cmake ${source_dir} -DNANOARROW_BUILD_INTEGRATION_TESTS=ON
 cmake --build .
-popd
-
-# Build nanoarrow IPC integration tests
-mkdir -p ipc && pushd ipc
-cmake ${source_dir}/extensions/nanoarrow_ipc -DNANOARROW_IPC_BUILD_APPS=ON
-cmake --build .
-popd
 
 popd

dev/archery/archery/integration/tester_nanoarrow.py

@@ -25,11 +25,11 @@
 
 _NANOARROW_PATH = os.environ.get(
     "ARROW_NANOARROW_PATH",
-    os.path.join(ARROW_ROOT_DEFAULT, "nanoarrow"),
+    os.path.join(ARROW_ROOT_DEFAULT, "nanoarrow/cdata"),
 )
 
 _INTEGRATION_DLL = os.path.join(
-    _NANOARROW_PATH, "cdata/libnanoarrow_c_data_integration" + cdata.dll_suffix
+    _NANOARROW_PATH, "libnanoarrow_c_data_integration" + cdata.dll_suffix
 )
 
 
@@ -105,10 +105,8 @@ def _check_nanoarrow_error(self, na_error):
         """
         assert self.ffi.typeof(na_error) is self.ffi.typeof("const char*")
         if na_error != self.ffi.NULL:
-            # TODO: remove these...at least one call is returning a non-null-terminated
-            # message causing a crash.
-            # error = self.ffi.string(na_error).decode("utf8", errors="replace")
-            raise RuntimeError("nanoarrow C Data Integration call failed")
+            error = self.ffi.string(na_error).decode("utf8", errors="replace")
+            raise RuntimeError(f"nanoarrow C Data Integration call failed: {error}")
 
 
 class NanoarrowCDataExporter(CDataExporter, _CDataBase):