1 files changed, 106 insertions, 0 deletions
diff --git a/src/scripts/utilities.py b/src/scripts/utilities.py
new file mode 100644
index 0000000000..6898bb7542
--- /dev/null
+++ b/src/scripts/utilities.py
@@ -0,0 +1,106 @@
+from filecmp import dircmp
+from hashlib import sha256
+from io import StringIO
+import shutil
+import os
+
+class WrappedStringIO(StringIO):
+    """A wrapper around StringIO to allow writing str objects"""
+    def write(self, s):
+        if isinstance(s, str):
+            s = unicode(s)
+        super(WrappedStringIO, self).write(s)
+
+class UpdateFileWriter:
+    """A file-like context object which will only write to a file if the result would be different
+
+    Attributes:
+        filename (str): The name of the file to update
+        stream (WrappedStringIO): The file-like stream provided upon context enter
+
+    Args:
+        filename (str): Sets the filename attribute
+    """
+    filemode = 'w'
+
+    def __init__(self, filename):
+        self.filename = filename
+        self.stream = None
+
+    def __enter__(self):
+        self.stream = WrappedStringIO()
+        return self.stream
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        if exc_value is None:
+            new_content = self.stream.getvalue()
+            new_hash = sha256()
+            cur_hash = sha256()
+
+            try:
+                with open(self.filename, 'r') as fstream:
+                    cur_hash.update(fstream.read())
+                file_found = True
+            except IOError:
+                file_found = False
+
+            if file_found:
+                new_hash.update(new_content)
+                update = new_hash.digest() != cur_hash.digest()
+            else:
+                update = True
+
+            if update:
+                with open(self.filename, 'w') as fstream:
+                    fstream.write(new_content)
+
+        self.stream.close()
+
+def open_for_update(filename):
+    return UpdateFileWriter(filename)
+
+def walk_recursively_and_update(dcmp):
+    #for different Files Copy from right to left
+    for name in dcmp.diff_files:
+        srcpath = dcmp.right + "/" + name
+        destpath = dcmp.left + "/" + name
+        print("Updating %s" % (destpath))
+        if  os.path.isfile(srcpath):
+            shutil.copyfile(srcpath, destpath)
+        else :
+            raise Exception("path: " + srcpath + "is neither a file or folder")
+
+    #copy right only files
+    for name in dcmp.right_only:
+        srcpath = dcmp.right + "/" + name
+        destpath = dcmp.left + "/" + name
+        print("Updating %s" % (destpath))
+        if  os.path.isfile(srcpath):
+            shutil.copyfile(srcpath, destpath)
+        elif  os.path.isdir(srcpath):
+            shutil.copytree(srcpath, destpath)
+        else :
+            raise Exception("path: " + srcpath + "is neither a file or folder")
+
+    #delete left only files
+    for name in dcmp.left_only:
+        path = dcmp.left + "/" + name
+        print("Deleting %s" % (path))
+        if  os.path.isfile(path):
+            os.remove(path)
+        elif  os.path.isdir(path):
+            shutil.rmtree(path)
+        else :
+            raise Exception("path: " + path + "is neither a file or folder")
+
+    #call recursively
+    for sub_dcmp in dcmp.subdirs.values():
+        walk_recursively_and_update(sub_dcmp)
+
+def UpdateDirectory(destpath,srcpath):
+
+    print("Updating %s with %s" % (destpath,srcpath))
+    if not os.path.exists(destpath):
+        os.makedirs(destpath)
+    dcmp = dircmp(destpath,srcpath)
+    walk_recursively_and_update(dcmp)