Fixed installation issues

MANIFEST.in

@@ -1,4 +1,4 @@
 include requirements.txt
 include test-requirements.txt
 include README.md
-include balkian-pre-commit/VERSION
+include balkian_pre_commit/VERSION

balkian_pre_commit/__init__.py

@@ -18,18 +18,21 @@ pro-commit hooks for various projects
 """
 
 from __future__ import print_function
-import semver
 from .version import __version__
 
-__version_info__ = semver.parse_version_info(__version__)
+try:
+    import semver
+    __version_info__ = semver.parse_version_info(__version__)
 
-if __version_info__.prerelease:
-    import logging
-    logger = logging.getLogger(__name__)
-    msg = 'WARNING: You are using a pre-release version of {} ({})'.format(
-        __name__, __version__)
-    if len(logging.root.handlers) > 0:
-        logger.info(msg)
-    else:
-        import sys
-        print(msg, file=sys.stderr)
+    if __version_info__.prerelease:
+        import logging
+        logger = logging.getLogger(__name__)
+        msg = 'WARNING: You are using a pre-release version of {} ({})'.format(
+            __name__, __version__)
+        if len(logging.root.handlers) > 0:
+            logger.info(msg)
+        else:
+            import sys
+            print(msg, file=sys.stderr)
+except ImportError:
+    print('semver not installed, not doing version checking')

balkian_pre_commit/branchversion.py

@@ -8,13 +8,16 @@ def main(argv=None):
     parser.add_argument('filenames', nargs='*')
     args = parser.parse_args(argv)
     branch_name = check_output(['git', 'rev-parse', '--abbrev-ref', 'HEAD']).strip().decode()
-    if branch_name == 'master':
-        for fn in args.filenames:
-            if os.path.basename(fn) == 'VERSION':
-                with open(fn) as f:
-                    version = semver.parse_version_info(f.read())
-                    if version.prerelease:
-                        return 1
+    for fn in args.filenames:
+        if os.path.basename(fn) == 'VERSION':
+            with open(fn) as f:
+                currentcontent = f.read().strip()
+                prevcontent = check_output(['git', 'show', 'HEAD:{}'.format(fn)]).strip().decode()
+                current = semver.parse_version_info(currentcontent)
+                print('Checking versions: {} -> {}'.format(prevcontent, currentcontent))
+                if (branch_name == 'master' and current.prerelease) or\
+                   (semver.compare(currentcontent, prevcontent)<1):
+                    return 1
     return 0
 
 if __name__ == '__main__':

hooks.yaml

@@ -3,4 +3,4 @@
   description: This hook avoids commiting a pre-release to a master branch.
   entry: branchversion
   language: python
-  files: VERSION$
+  files: "VERSION$"