ARROW-767: [C++] Filesystem abstraction

cpp/src/arrow/CMakeLists.txt

@@ -105,6 +105,8 @@ set(ARROW_SRCS
     csv/options.cc
     csv/parser.cc
     csv/reader.cc
+    filesystem/filesystem.cc
+    filesystem/mockfs.cc
     json/options.cc
     json/chunked-builder.cc
     json/chunker.cc
@@ -364,6 +366,7 @@ add_arrow_benchmark(column-benchmark)
 
 add_subdirectory(array)
 add_subdirectory(csv)
+add_subdirectory(filesystem)
 add_subdirectory(json)
 add_subdirectory(io)
 add_subdirectory(util)

cpp/src/arrow/filesystem/CMakeLists.txt

@@ -0,0 +1,21 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+# Headers: top level
+arrow_install_all_headers("arrow/filesystem")
+
+add_arrow_test(filesystem-test)