copy newer_group form distutils.dep_util to avoid import distutils (PaddlePaddle#5183)

Author: guoshengCS

paddlenlp/ops/ext_utils.py

@@ -18,7 +18,6 @@
 import subprocess
 import sys
 import textwrap
-from distutils.dep_util import newer_group
 from pathlib import Path
 
 from filelock import FileLock
@@ -71,6 +70,47 @@ def _get_files(path):
     return all_files
 
 
+# copy form distutils.dep_util to avoid import distutils
+def newer_group(sources, target, missing="error"):
+    """Return true if 'target' is out-of-date with respect to any file
+    listed in 'sources'.  In other words, if 'target' exists and is newer
+    than every file in 'sources', return false; otherwise return true.
+    'missing' controls what we do when a source file is missing; the
+    default ("error") is to blow up with an OSError from inside 'stat()';
+    if it is "ignore", we silently drop any missing source files; if it is
+    "newer", any missing source files make us assume that 'target' is
+    out-of-date (this is handy in "dry-run" mode: it'll make you pretend to
+    carry out commands that wouldn't work because inputs are missing, but
+    that doesn't matter because you're not actually going to run the
+    commands).
+    """
+    # If the target doesn't even exist, then it's definitely out-of-date.
+    if not os.path.exists(target):
+        return 1
+
+    # Otherwise we have to find out the hard way: if *any* source file
+    # is more recent than 'target', then 'target' is out-of-date and
+    # we can immediately return true.  If we fall through to the end
+    # of the loop, then 'target' is up-to-date and we return false.
+    from stat import ST_MTIME
+
+    target_mtime = os.stat(target)[ST_MTIME]
+    for source in sources:
+        if not os.path.exists(source):
+            if missing == "error":  # blow up when we stat() the file
+                pass
+            elif missing == "ignore":  # missing source dropped from
+                continue  # target's dependency list
+            elif missing == "newer":  # missing source means target is
+                return 1  # out-of-date
+
+        source_mtime = os.stat(source)[ST_MTIME]
+        if source_mtime > target_mtime:
+            return 1
+    else:
+        return 0
+
+
 class CMakeExtension(Extension):
     def __init__(self, name, source_dir=None):
         # A CMakeExtension needs a source_dir instead of a file list.