1

scripts/ops/_replace.py

@@ -0,0 +1,29 @@
+import sys
+old_file = sys.argv[1]
+new_file = sys.argv[2]
+target   = sys.argv[3]
+
+with open(old_file, 'rb') as f:
+    old = f.read().decode('utf-8').replace('\r\n', '\n').replace('\r', '\n')
+with open(new_file, 'rb') as f:
+    new = f.read().decode('utf-8').replace('\r\n', '\n').replace('\r', '\n')
+with open(target, 'rb') as f:
+    raw = f.read()
+# detect line ending in target
+crlf = b'\r\n' in raw
+doc = raw.decode('utf-8').replace('\r\n', '\n').replace('\r', '\n')
+
+if old not in doc:
+    print('ERROR: old_string not found in', target)
+    # show closest match
+    words = old[:30]
+    idx = doc.find(words[:20])
+    print('Closest at:', idx, repr(doc[idx:idx+60]) if idx >= 0 else 'not found')
+    sys.exit(1)
+
+doc2 = doc.replace(old, new, 1)
+if crlf:
+    doc2 = doc2.replace('\n', '\r\n')
+with open(target, 'wb') as f:
+    f.write(doc2.encode('utf-8'))
+print('OK replaced 1 occurrence in', target)