distributed.camp
A Python port of the Invisible Internet Project (I2P)
1"""Semantic version comparison.
2
3Ported from net.i2p.util.VersionComparator.
4"""
5
6from __future__ import annotations
7
8import re
9
10
11def compare_versions(v1: str, v2: str) -> int:
12 """Compare two version strings numerically.
13
14 Returns -1 if v1 < v2, 0 if equal, 1 if v1 > v2.
15 Handles versions like "0.9.50", "0.9.50-1", "2.3.0".
16 """
17 parts1 = [int(x) for x in re.split(r"[.\-]", v1)]
18 parts2 = [int(x) for x in re.split(r"[.\-]", v2)]
19
20 # Pad shorter list with zeros
21 max_len = max(len(parts1), len(parts2))
22 parts1.extend([0] * (max_len - len(parts1)))
23 parts2.extend([0] * (max_len - len(parts2)))
24
25 for a, b in zip(parts1, parts2):
26 if a < b:
27 return -1
28 if a > b:
29 return 1
30 return 0