#!/usr/bin/env python3
+"""Print current tinc version for using in build scripts.
+
+First try to determine the latest version using git tags. If this fails (because
+the .git directory is missing, git is not installed, or for some other reason),
+fall back to using the VERSION file. If it is not present or could not be read,
+use 'unknown'.
+"""
+
from os import path, environ
from sys import argv, stderr
import subprocess as subp
+import typing as T
-prefix = "release-"
-source_root = path.dirname(path.realpath(__file__))
-source_root = environ.get("MESON_SOURCE_ROOT", source_root)
+PREFIX = "release-"
+SOURCE_ROOT = path.dirname(path.realpath(__file__))
+SOURCE_ROOT = environ.get("MESON_SOURCE_ROOT", SOURCE_ROOT)
cmd = [
"git",
"--git-dir",
- path.join(source_root, ".git"),
+ path.join(SOURCE_ROOT, ".git"),
"describe",
"--always",
"--tags",
- "--match=" + prefix + "*",
+ "--match=" + PREFIX + "*",
]
if "short" in argv:
cmd.append("--abbrev=0")
-version = None
+version: T.Optional[str] = None
try:
- result = subp.run(cmd, stdout=subp.PIPE, encoding="utf-8")
+ result = subp.run(cmd, stdout=subp.PIPE, encoding="utf-8", check=False)
if not result.returncode:
version = result.stdout
except FileNotFoundError:
if not version:
try:
- with open(path.join(source_root, "VERSION"), "r") as f:
+ with open(path.join(SOURCE_ROOT, "VERSION"), "r", encoding="utf-8") as f:
version = f.read().strip()
except OSError as e:
print("could not read version from file", e, file=stderr)
-elif version.startswith(prefix):
- version = version[len(prefix):].strip()
+elif version.startswith(PREFIX):
+ version = version[len(PREFIX) :].strip()
print(version if version else "unknown", end="")