PEP 386-compliant version

systemjs/__init__.py

@@ -1 +1,77 @@
-__version__ = '1.0.2'
+"""
+Version code taken from django.utils.version.
+"""
+
+import datetime
+import os
+import subprocess
+
+
+VERSION = (1, 1, 0, 'alpha', 0)
+
+
+def get_version(version=None):
+    "Returns a PEP 386-compliant version number from VERSION."
+    version = get_complete_version(version)
+
+    # Now build the two parts of the version number:
+    # main = X.Y[.Z]
+    # sub = .devN - for pre-alpha releases
+    #     | {a|b|c}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': 'c'}
+        sub = mapping[version[3]] + str(version[4])
+
+    return str(main + sub)
+
+
+def get_main_version(version=None):
+    "Returns main version (X.Y[.Z]) from VERSION."
+    version = get_complete_version(version)
+    parts = 2 if version[2] == 0 else 3
+    return '.'.join(str(x) for x in version[:parts])
+
+
+def get_complete_version(version=None):
+    """Returns a tuple of the django version. If version argument is non-empty,
+    then checks for correctness of the tuple provided.
+    """
+    if version is None:
+        from django import VERSION as version
+    else:
+        assert len(version) == 5
+        assert version[3] in ('alpha', 'beta', 'rc', 'final')
+
+    return version
+
+
+def get_git_changeset():
+    """Returns 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')
+
+
+__version__ = get_version(VERSION)