--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mozillahg/api.py	Tue Jan 22 21:30:20 2013 -0800
@@ -0,0 +1,24 @@
+"""
+mercurial front end API using hg CLI
+"""
+
+import subprocess
+
+from subprocess import check_output as call
+
+class Hg(object):
+    def __init__(self, path, hg=None):
+        self.hg = hg or 'hg'
+        self.path = path
+
+    def __call__(self, *args):
+        call([self.hg] + list(args))
+
+    def commits(self, start, finish=None):
+        """
+        list all commits in a range: [start..finish]
+        if `finish` is omitted, tip is used
+        """
+
+        output = self("log", "", "--template", "{rev}\n")
+        return [line.strip() for line in output.strip().splitlines()