1 files changed, 81 insertions, 0 deletions
diff --git a/verhawk/scanner.py b/verhawk/scanner.py
new file mode 100644
index 0000000..41b6ecd
--- /dev/null
+++ b/verhawk/scanner.py
@@ -0,0 +1,81 @@
+from __future__ import print_function
+import json
+import os
+import pkgutil
+import sys
+from . import constants
+
+
+class Scanner(object):
+    def __init__(self, package, exclusions=[], recursive=False, packages_only=False):
+        self.package = package
+        self.prefix = self.package.__name__ + '.'
+        self.exclusions = exclusions
+        self.versions = dict()
+        self.recursive = recursive
+        self.packages_only = packages_only
+        self.scan()
+
+    def __iter__(self):
+        for k, v in self.versions.items():
+            yield k, v
+
+    def scan(self):
+        try:
+            module = self.package
+            modname = module.__name__
+
+            try:
+                self.versions[modname] = module.__version__ or module.version or module._version
+            except AttributeError:
+                self.versions[modname] = None
+        except ImportError as e:
+            print('ImportError({0}): {1}'.format(modname, e), file=sys.stderr)
+
+        if self.recursive:
+            try:
+                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
+
+                    if self.packages_only and not ispkg:
+                        continue
+
+                    try:
+                        module = None
+                        with open(os.devnull, 'w') as devnull:
+                            sys.stdout = devnull
+                            module = importer.find_module(modname).load_module(modname)
+
+                        sys.stdout = constants.STDOUT
+
+                        try:
+                            self.versions[modname] = module.__version__ or module.version or module._version
+                        except AttributeError:
+                            self.versions[modname] = None
+
+                    except ImportError as e:
+                        print('ImportError({0}): {1}'.format(modname, e), file=sys.stderr)
+
+            except AttributeError:
+                # has no sub-packages or sub-modules, so ignore
+                pass
+            except TypeError:
+                # has strange requirements at import-time, so ignore
+                pass
+
+    def as_json(self):
+        return json.dumps(self.versions, sort_keys=True)
+
+
+    def as_zip(self):
+        return zip(self.versions.keys(), self.versions.values())
+
+