work

ssh_lib/slugify.py

@@ -0,0 +1,40 @@
+import re
+import unicodedata
+
+
+# Pre-compiled patterns for better performance
+_RE_INVALID = re.compile(r'[^a-z0-9_-]+')
+_RE_SEPARATORS = re.compile(r'[-_]+')
+
+
+def slugify(
+    value: str | bytes | int | float | None,
+    *,
+    separator: str = '-',
+) -> str:
+    if value in (None, ''):
+        return ''
+
+    if separator not in ('-', '_'):
+        raise ValueError(f"separator must be '-' or '_', got {repr(separator)}")
+
+    # 1. Normalize value to string
+    if isinstance(value, bytes):
+        value = value.decode('utf-8', 'ignore')
+    else:
+        value = str(value)
+
+    # 2. Unicode → ASCII, then lowercase
+    value = unicodedata.normalize('NFKD', value)
+    value = value.encode('ascii', 'ignore').decode('ascii').lower()
+
+    # 3. Replace invalid characters with separator
+    value = _RE_INVALID.sub(separator, value)
+
+    # 4. Collapse multiple separators
+    value = _RE_SEPARATORS.sub(separator, value)
+
+    # 5. Strip separators from edges
+    value = value.strip('-_')
+
+    return value