From 2fcdb37e7bbf9dd01bc8e10d30a8ae673b94638a Mon Sep 17 00:00:00 2001
From: Abhijit Menon-Sen <ams@2ndQuadrant.com>
Date: Fri, 18 Sep 2015 22:28:34 +0530
Subject: [PATCH] =?UTF-8?q?Support=20=C2=ABhosts:=20groupname[1:]=C2=BB=20?=
 =?UTF-8?q?notation=20(~=3D=20'the=20rest=20of=20the=20group')?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 docsite/rst/intro_patterns.rst         |  5 +++--
 lib/ansible/inventory/__init__.py      | 10 +++++++---
 test/units/inventory/test_inventory.py |  3 +++
 3 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/docsite/rst/intro_patterns.rst b/docsite/rst/intro_patterns.rst
index 9238d92869..67d1302ffc 100644
--- a/docsite/rst/intro_patterns.rst
+++ b/docsite/rst/intro_patterns.rst
@@ -79,8 +79,9 @@ You can refer to hosts within the group by adding a subscript to the group name:
 
     webservers[0]       # == cobweb
     webservers[-1]      # == weber
-    webservers[0:1]     # == webservers[0]:webservers[1]
-                        # == cobweb:webbing
+    webservers[0:1]     # == webservers[0],webservers[1]
+                        # == cobweb,webbing
+    webservers[1:]      # == webbing,weber
 
 Most people don't specify patterns as regular expressions, but you can.  Just start the pattern with a '~'::
 
diff --git a/lib/ansible/inventory/__init__.py b/lib/ansible/inventory/__init__.py
index 99e6729b89..cd787e6876 100644
--- a/lib/ansible/inventory/__init__.py
+++ b/lib/ansible/inventory/__init__.py
@@ -342,9 +342,9 @@ class Inventory(object):
             r'''^
                 (.+)                    # A pattern expression ending with...
                 \[(?:                   # A [subscript] expression comprising:
-                    (-?[0-9]+)          # A single positive or negative number
-                    |                   # Or a numeric range
-                    ([0-9]+)([:-])([0-9]+)
+                    (-?[0-9]+)|         # A single positive or negative number
+                    ([0-9]+)([:-])      # Or an x:y or x: range.
+                    ([0-9]*)
                 )\]
                 $
             ''', re.X
@@ -357,6 +357,8 @@ class Inventory(object):
             if idx:
                 subscript = (int(idx), None)
             else:
+                if not end:
+                    end = -1
                 subscript = (int(start), int(end))
                 if sep == '-':
                     display.deprecated("Use [x:y] inclusive subscripts instead of [x-y]", version=2.0, removed=True)
@@ -375,6 +377,8 @@ class Inventory(object):
         (start, end) = subscript
 
         if end:
+            if end == -1:
+                end = len(hosts)-1
             return hosts[start:end+1]
         else:
             return [ hosts[start] ]
diff --git a/test/units/inventory/test_inventory.py b/test/units/inventory/test_inventory.py
index 72c593db35..e7bcceb85d 100644
--- a/test/units/inventory/test_inventory.py
+++ b/test/units/inventory/test_inventory.py
@@ -66,6 +66,9 @@ class TestInventory(unittest.TestCase):
         'a[2:3]': [('a', (2, 3)), ['c', 'd']],
         'a[-1]': [('a', (-1, None)), ['Z']],
         'a[-2]': [('a', (-2, None)), ['Y']],
+        'a[48:]': [('a', (48, -1)), ['W', 'X', 'Y', 'Z']],
+        'a[49:]': [('a', (49, -1)), ['X', 'Y', 'Z']],
+        'a[1:]': [('a', (1, -1)), list(string.ascii_letters[1:])],
     }
 
     def setUp(self):