From 5ea773c50568088b30e15728b65480d0335fe14e Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Mon, 22 Jul 2019 13:15:08 +0100 Subject: Cache get_version_string. The version of a module isn't going to change over the lifetime of the process (assuming no funky hot reloading is going on, which it isn't), so let's just cache the result to avoid spawning lots of git subprocesses. Fixes #5672. --- synapse/util/versionstring.py | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-) diff --git a/synapse/util/versionstring.py b/synapse/util/versionstring.py index a4d9a462f7..fa404b9d75 100644 --- a/synapse/util/versionstring.py +++ b/synapse/util/versionstring.py @@ -22,6 +22,23 @@ logger = logging.getLogger(__name__) def get_version_string(module): + """Given a module calculate a git-aware version string for it. + + If called on a module not in a git checkout will return `__verison__`. + + Args: + module (module) + + Returns: + str + """ + + cached_version = getattr(module, "_synapse_version_string_cache", None) + if cached_version: + return cached_version + + version_string = module.__version__ + try: null = open(os.devnull, "w") cwd = os.path.dirname(os.path.abspath(module.__file__)) @@ -80,8 +97,10 @@ def get_version_string(module): s for s in (git_branch, git_tag, git_commit, git_dirty) if s ) - return "%s (%s)" % (module.__version__, git_version) + version_string = "%s (%s)" % (module.__version__, git_version) except Exception as e: logger.info("Failed to check for git repository: %s", e) - return module.__version__ + module._synapse_version_string_cache = version_string + + return version_string -- cgit 1.4.1