1 files changed, 57 insertions, 0 deletions
diff --git a/morphlib/gitversion.py b/morphlib/gitversion.py
new file mode 100644
index 00000000..b1f82da6
--- /dev/null
+++ b/morphlib/gitversion.py
@@ -0,0 +1,57 @@
+# Copyright (C) 2013  Codethink Limited
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+
+'''Version information retrieved either from the package data, or the
+   git repository the library is being run from.
+
+   It is an error to run morph without this version information, since
+   it makes it impossible to reproduce any Systems that are built.
+'''
+
+
+import subprocess
+import os
+
+import cliapp
+
+
+try:
+    import pkgutil
+    version = pkgutil.get_data('morphlib', 'version')
+    commit = pkgutil.get_data('morphlib', 'commit')
+    tree = pkgutil.get_data('morphlib', 'tree')
+    ref = pkgutil.get_data('morphlib', 'ref')
+except IOError, e:
+    from os.path import dirname
+    def run_git(*args):
+        command = ['git'] + list(args)
+        p = subprocess.Popen(command,
+                             cwd=os.path.dirname(__file__),
+                             stdout=subprocess.PIPE,
+                             stderr=subprocess.STDOUT)
+        o = p.communicate()
+        if p.returncode:
+            raise subprocess.CalledProcessError(p.returncode,
+                                                command)
+        return o[0].strip()
+
+    try:
+        version = run_git('describe', '--always', '--dirty=-unreproducible')
+        commit = run_git('rev-parse', 'HEAD^{commit}')
+        tree = run_git('rev-parse', 'HEAD^{tree}')
+        ref = run_git('rev-parse', '--symbolic-full-name', 'HEAD')
+    except cliapp.AppException:
+        raise cliapp.AppException("morphlib version could not be determined")