moving version detection into version.py and hg_keywords.py

3 files changed, 27 insertions, 4 deletions

diff --git a/hg_keywords.py b/hg_keywords.py
new file mode 100644
index 0000000..778c514
--- /dev/null
+++ b/hg_keywords.py
@@ -0,0 +1,19 @@
+import re
+
+keyword_rx = re.compile('^\$(\w+)\:\s+(\W+)\s*\$$')
+
+# returns tuple (key, value)
+# returns None if kwstring is not a keyword expansion
+def extract_keyvalue(kwstring):
+    mo = keyword_rx.match(kwstring)
+    if mo is None: return None
+
+    try:
+        return mo.group(1,2)
+    except IndexError:
+        return None
+
+
+    
+def keywords(*kwstrings):
+    dict([extract_kwvalue(kws) for kws in kwstrings])
diff --git a/setup.py b/setup.py
index c1919f6..1c7e974 100644
--- a/setup.py
+++ b/setup.py
@@ -1,9 +1,5 @@
 from setuptools import setup
 
-branches = "$branches$"
-node = "$node$"
-tags = "$tags$"
-
 setup(
     name = "urllib2_kerberos"
     )
diff --git a/version.py b/version.py
new file mode 100644
index 0000000..d61a600
--- /dev/null
+++ b/version.py
@@ -0,0 +1,8 @@
+import hg_keywords
+
+keywords = hg_keywords.keywords(
+    "$branches$",
+    "$node",
+    "$rev$",
+    "$tags$"
+    )