Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 109 insertions, 0 deletions

diff --git a/src/arrow/cpp/build-support/lintutils.py b/src/arrow/cpp/build-support/lintutils.py
new file mode 100644
index 000000000..2386eb2e6
--- /dev/null
+++ b/src/arrow/cpp/build-support/lintutils.py
@@ -0,0 +1,109 @@
+# 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.
+
+import multiprocessing as mp
+import os
+from fnmatch import fnmatch
+from subprocess import Popen
+
+
+def chunk(seq, n):
+    """
+    divide a sequence into equal sized chunks
+    (the last chunk may be smaller, but won't be empty)
+    """
+    chunks = []
+    some = []
+    for element in seq:
+        if len(some) == n:
+            chunks.append(some)
+            some = []
+        some.append(element)
+    if len(some) > 0:
+        chunks.append(some)
+    return chunks
+
+
+def dechunk(chunks):
+    "flatten chunks into a single list"
+    seq = []
+    for chunk in chunks:
+        seq.extend(chunk)
+    return seq
+
+
+def run_parallel(cmds, **kwargs):
+    """
+    Run each of cmds (with shared **kwargs) using subprocess.Popen
+    then wait for all of them to complete.
+    Runs batches of multiprocessing.cpu_count() * 2 from cmds
+    returns a list of tuples containing each process'
+    returncode, stdout, stderr
+    """
+    complete = []
+    for cmds_batch in chunk(cmds, mp.cpu_count() * 2):
+        procs_batch = [Popen(cmd, **kwargs) for cmd in cmds_batch]
+        for proc in procs_batch:
+            stdout, stderr = proc.communicate()
+            complete.append((proc.returncode, stdout, stderr))
+    return complete
+
+
+_source_extensions = '''
+.h
+.cc
+.cpp
+'''.split()
+
+
+def get_sources(source_dir, exclude_globs=[]):
+    sources = []
+    for directory, subdirs, basenames in os.walk(source_dir):
+        for path in [os.path.join(directory, basename)
+                     for basename in basenames]:
+            # filter out non-source files
+            if os.path.splitext(path)[1] not in _source_extensions:
+                continue
+
+            path = os.path.abspath(path)
+
+            # filter out files that match the globs in the globs file
+            if any([fnmatch(path, glob) for glob in exclude_globs]):
+                continue
+
+            sources.append(path)
+    return sources
+
+
+def stdout_pathcolonline(completed_process, filenames):
+    """
+    given a completed process which may have reported some files as problematic
+    by printing the path name followed by ':' then a line number, examine
+    stdout and return the set of actually reported file names
+    """
+    returncode, stdout, stderr = completed_process
+    bfilenames = set()
+    for filename in filenames:
+        bfilenames.add(filename.encode('utf-8') + b':')
+    problem_files = set()
+    for line in stdout.splitlines():
+        for filename in bfilenames:
+            if line.startswith(filename):
+                problem_files.add(filename.decode('utf-8'))
+                bfilenames.remove(filename)
+                break
+    return problem_files, stdout