From 7b8b9f899509eb847c8f061c1cf01379413da033 Mon Sep 17 00:00:00 2001
From: Nikita Manovich <nikita.manovich@intel.com>
Date: Wed, 23 Jan 2019 18:43:20 +0300
Subject: [PATCH] Added cvat.utils with get_version implementation

---
 cvat/utils/version.py | 59 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 cvat/utils/version.py

diff --git a/cvat/utils/version.py b/cvat/utils/version.py
new file mode 100644
index 000000000000..b69c718b4111
--- /dev/null
+++ b/cvat/utils/version.py
@@ -0,0 +1,59 @@
+# Copyright (C) 2019 Intel Corporation
+#
+# SPDX-License-Identifier: MIT
+#
+# Note: It is slightly re-implemented Django version of code. We cannot use
+# get_version from django.utils.version module because get_git_changeset will
+# always return empty value (cwd=repo_dir isn't correct). Also it gives us a
+# way to define the version as we like.
+
+import datetime
+import os
+import subprocess
+
+def get_version(version):
+    """Return a PEP 440-compliant version number from VERSION."""
+    # Now build the two parts of the version number:
+    # main = X.Y[.Z]
+    # sub = .devN - for pre-alpha releases
+    #     | {a|b|rc}N - for alpha, beta, and rc releases
+
+    main = get_main_version(version)
+
+    sub = ''
+    if version[3] == 'alpha' and version[4] == 0:
+        git_changeset = get_git_changeset()
+        if git_changeset:
+            sub = '.dev%s' % git_changeset
+
+    elif version[3] != 'final':
+        mapping = {'alpha': 'a', 'beta': 'b', 'rc': 'rc'}
+        sub = mapping[version[3]] + str(version[4])
+
+    return main + sub
+
+def get_main_version(version):
+    """Return main version (X.Y[.Z]) from VERSION."""
+    parts = 2 if version[2] == 0 else 3
+    return '.'.join(str(x) for x in version[:parts])
+
+def get_git_changeset():
+    """Return a numeric identifier of the latest git changeset.
+
+    The result is the UTC timestamp of the changeset in YYYYMMDDHHMMSS format.
+    This value isn't guaranteed to be unique, but collisions are very unlikely,
+    so it's sufficient for generating the development version numbers.
+    """
+    repo_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+    git_log = subprocess.Popen(
+        'git log --pretty=format:%ct --quiet -1 HEAD',
+        stdout=subprocess.PIPE, stderr=subprocess.PIPE,
+        shell=True, cwd=repo_dir, universal_newlines=True,
+    )
+    timestamp = git_log.communicate()[0]
+    try:
+        timestamp = datetime.datetime.utcfromtimestamp(int(timestamp))
+    except ValueError:
+        return None
+    return timestamp.strftime('%Y%m%d%H%M%S')
+