1 files changed, 82 insertions, 0 deletions
diff --git a/versionscanner.py b/versionscanner.py
new file mode 100755
index 0000000..eeeca14
--- /dev/null
+++ b/versionscanner.py
@@ -0,0 +1,82 @@
+#!/usr/bin/env python
+from __future__ import print_function
+import json
+import pkgutil
+import sys
+from pprint import pprint
+
+
+class VersionScanner(object):
+    def __init__(self, package, exclusions=[]):
+        self.package = package
+        self.prefix = self.package.__name__ + '.'
+        self.exclusions = exclusions
+        self.versions = dict()
+        self.scan()
+        
+
+    def __iter__(self):
+        for k, v in self.versions.items():
+            yield k, v
+
+    
+    def scan(self):
+        try:
+            module = self.package
+        
+            try:
+                self.versions[module.__name__] = module.__version__
+            except AttributeError:
+                self.versions[module.__name__] = 'unknown'
+        except ImportError as e:
+            print('ImportError({0}): {1}'.format(module.__name__, e), file=sys.stderr)
+
+        for importer, modname, ispkg in pkgutil.iter_modules(self.package.__path__, self.prefix):
+            excluded = False
+            for ex in self.exclusions:
+                ex = self.prefix + ex
+                if modname == ex:
+                    excluded = True 
+                    break
+    
+            if excluded:
+                continue
+    
+            try:
+                module = importer.find_module(modname).load_module(modname)
+        
+                try:
+                    self.versions[modname] = module.__version__
+                except AttributeError:
+                    self.versions[modname] = 'unknown'
+            except ImportError as e:
+                print('ImportError({0}): {1}'.format(modname, e), file=sys.stderr)
+
+    def as_json(self):
+        return json.dumps(self.versions, sort_keys=True)
+
+
+    def as_zip(self):
+        return zip(self.versions.keys(), self.versions.values())
+
+
+if __name__ == '__main__':
+    import argparse
+    import importlib
+
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument('parent_package')
+    parser.add_argument('-e', '--exclude', action='append', default=[])
+    parser.add_argument('-j', '--json', action='store_true')
+
+    args = parser.parse_args()
+    parent_package = importlib.import_module(args.parent_package)
+    scanner = VersionScanner(parent_package, args.exclude)
+
+
+    if args.json:
+        print(scanner.as_json())
+    else:
+        for pkg, version in sorted(scanner):
+            print('{0}={1}'.format(pkg, version))