Skip files which haven't changed

Garbage Cleaner/garbageCleaner.py

@@ -1,5 +1,4 @@
-import sys, os, shutil
-import configparser
+import sys, os, shutil, filecmp, configparser
 
 config = configparser.ConfigParser()
 
@@ -95,6 +94,7 @@ fileExtensionsToCopy = (
 
 totalFiles = 0
 totalFilesCopied = 0
+totalFilesAlreadyValid = 0
 for folder in foldersToCopy:
     for root, dirs, files in os.walk(sourceDir + "\\" + folder):
         for file in files:
@@ -104,9 +104,15 @@ for folder in foldersToCopy:
                 relname = pathname.replace(sourceDir, "")
                 destpath = copyToDir + relname
                 if os.path.isfile(pathname):
+
+                    if os.path.isfile(destpath) and filecmp.cmp(pathname, destpath, shallow=True):
+                        print("Skipping " + pathname)
+                        totalFilesAlreadyValid = totalFilesAlreadyValid + 1
+                        continue
+
                     os.makedirs(os.path.dirname(destpath), exist_ok=True)
                     shutil.copy2(pathname, destpath)
                     totalFilesCopied = totalFilesCopied + 1
                     print(relname)
 
-print(str(totalFiles) + " total files. " + str(totalFilesCopied) + " copied.")
+print(str(totalFiles) + " total files. " + str(totalFilesCopied) + " copied. " + str(totalFilesAlreadyValid) + " were not copied because they were identical.")