Add initial script to aid in cherrypicking from devel to stable-2.2

hacking/cherrypick.py

@@ -0,0 +1,52 @@
+#!/usr/bin/python3
+
+import os
+import sys
+import tempfile
+
+import sh
+
+REPO_PATH = {'extras': '/srv/ansible/stable-2.2/lib/ansible/modules/extras',
+        'core': '/srv/ansible/stable-2.2/lib/ansible/modules/core'}
+
+if __name__ == '__main__':
+    commit_hash = sys.argv[1]
+    which_modules = sys.argv[2]
+    git = sh.git.bake('--no-pager', _tty_out=False)
+    try:
+        # Get the change
+        git('checkout', 'devel')
+        patch = git('format-patch', '-1', '--stdout', commit_hash).stdout
+    finally:
+        git('checkout', '-')
+
+    # Transform the change for the new repo
+    patch = patch.replace(b'lib/ansible/modules/', b'')
+    new_patch = []
+    patch_stream = (l for l in patch.split(b'\n'))
+    for line in patch_stream:
+        if line.strip() == b'---':
+            new_patch.append(b'(cherry picked from %s)' % commit_hash.encode('utf-8'))
+            new_patch.append(line)
+            break
+        new_patch.append(line)
+    new_patch.extend(list(patch_stream))
+
+    # Save the patch
+    try:
+        fh, patchfilename = tempfile.mkstemp()
+        os.write(fh, b'\n'.join(new_patch))
+        os.close(fh)
+
+        # Apply the patch
+        try:
+            orig_dir = os.getcwd()
+            os.chdir(REPO_PATH[which_modules])
+            git('am', patchfilename)
+        finally:
+            os.chdir(orig_dir)
+    except:
+        print("Problem occurred.  Patch saved in: {}".format(patchfilename))
+    else:
+        os.remove(patchfilename)
+