Add initial version of blacklist mercurial extension for use to exclude PDK_3.0.f
authorPat Downey <patd@symbian.org>
Thu, 21 Jan 2010 16:55:34 +0000
changeset 143 6e81c130aa29
parent 135 47849267b4d1
child 144 1daa251167e8
Add initial version of blacklist mercurial extension for use to exclude and manage known bad changesets from mercurial repositories.
hg_hooks/blacklist/COPYING
hg_hooks/blacklist/README
hg_hooks/blacklist/blacklist.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hg_hooks/blacklist/COPYING	Thu Jan 21 16:55:34 2010 +0000
@@ -0,0 +1,339 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hg_hooks/blacklist/README	Thu Jan 21 16:55:34 2010 +0000
@@ -0,0 +1,34 @@
+hg blacklist 
+
+manage repository changeset blacklist
+  
+  This extension is used to manage a blacklist for the repository.
+  Can blacklist changesets by changeset id, and regular expressions against
+  the user field of a changeset and also a changesets file list.
+  
+  Current rules can be viewed using the [-l|--list] operation.
+  
+  Each modification to a blacklist is logged. These can be viewed using the 
+  --auditlog operation.
+  
+  Each time a changeset is blocked/denied it's logged. These can be viewed
+  using the --blocklog operation.
+  
+  Types of changeset blacklist rules can be defined implicitly or explicitly:
+  
+    If a rule definition contains between 12 and 40 hexadecimal characters 
+    it is assumed to be a rule matched against changeset id. Can be set 
+    explicitly set with the -n flag to the --add operation.
+  
+    If a rule definition contains a '@' it is assumed to be a rule matched 
+    against a changeset's user property. Can be set explicitly with 
+    the -u flag to the --add operation.
+  
+    Otherwise the rule is assumed to be matched against a changeset's file 
+    list. Can be set explicitly with the -f flag to the --add operation.
+  
+    When this extension is enabled a hook is also added to the 
+    'pretxnchangegroup' action that will block any incoming changesets 
+    (via pull/push/unbundle) if they are blacklisted.
+    It won't block any local commits.
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hg_hooks/blacklist/blacklist.py	Thu Jan 21 16:55:34 2010 +0000
@@ -0,0 +1,542 @@
+#!/usr/bin/env python
+#
+# Copyright (C) 2010 Mozilla Foundation
+# Copyright (C) 2010 Symbian Foundation
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+# Initial Contributors:
+#  Pat Downey <patd@symbian.org>
+# 
+# Contributors:
+#  Your name here?
+#
+# Description:
+#
+# An extension to mercurial that adds the ability to specify a blacklist for 
+# a repository. That is to deny a changeset from being pushed/pulled/unbundled
+# if it matches one of a set of patterns.
+#
+# At present it can deny nodes based on their changeset id, a regular expression
+# matched against the user field, or a regular expression matched against the
+# changeset's file list.
+#
+# Note: With the regular expression rules, if you want to match a string anywhere
+# with in a string, e.g. create a rule against files within directories called 
+# 'internal' the rule would need to be ..*/internal/.*'. That is you need to be 
+# explicit in specifying a set of any characters otherwise it will perform a
+# direct string comparison. #
+#
+# Requires sqlite extension (included in python 2.5 onwards)
+#  * Available for python 2.4 in python-sqlite2 package on RHEL5.2+
+#
+# Ideas for implementation came strongly from:
+# http://hg.mozilla.org/users/bsmedberg_mozilla.com/hghooks/file/tip/mozhghooks/pushlog.py
+#
+#
+
+'''manage repository changeset blacklist
+
+'''
+
+from mercurial import demandimport
+
+demandimport.disable()
+try:
+    import sqlite3 as sqlite
+except ImportError:
+    from pysqlite2 import dbapi2 as sqlite
+demandimport.enable()
+
+import binascii
+import os
+import os.path
+import re
+import stat
+import sys
+import time
+from datetime import datetime
+
+
+# changeset identifier 12-40 hex chars 
+NODE_RE='^[0-9|a-f]{12,40}'
+
+
+
+
+def blacklist(ui,repo,*args,**opts):
+  '''manage repository changeset blacklist
+  
+  This extension is used to manage a blacklist for the repository.
+  Can blacklist changesets by changeset id, and regular expressions against
+  the user field of a changeset and also a changesets file list.
+  
+  Current rules can be viewed using the [-l|--list] operation.
+  
+  Each modification to a blacklist is logged. These can be viewed using the 
+  --auditlog operation.
+  
+  Each time a changeset is blocked/denied it's logged. These can be viewed
+  using the --blocklog operation.
+  
+  Types of changeset blacklist rules can be defined implicitly or explicitly:
+  
+    If a rule definition contains between 12 and 40 hexadecimal characters 
+    it is assumed to be a rule matched against changeset id. Can be set 
+    explicitly set with the -n flag to the --add operation.
+  
+    If a rule definition contains a '@' it is assumed to be a rule matched 
+    against a changeset's user property. Can be set explicitly with 
+    the -u flag to the --add operation.
+  
+    Otherwise the rule is assumed to be matched against a changeset's file 
+    list. Can be set explicitly with the -f flag to the --add operation.
+  
+    When this extension is enabled a hook is also added to the 
+    'pretxnchangegroup' action that will block any incoming changesets 
+    (via pull/push/unbundle) if they are blacklisted.
+    It won't block any local commits.
+  '''
+  conn = openconn(ui, repo )      
+  if 'list' in opts and opts['list'] :
+    listblacklistrule(ui,conn,args,opts)
+  elif 'blocklog' in opts and opts['blocklog'] :
+    listblacklistblocklog(ui,conn,args,opts)
+  elif 'auditlog' in opts and opts['auditlog'] :
+    listblacklistauditlog(ui,conn,args,opts)
+  elif 'enable' in opts and opts['enable'] :
+    enableblacklistrule(ui,conn,args,opts) 
+  elif 'disable' in opts and opts['disable'] :
+    disableblacklistrule(ui,conn,args,opts)
+  elif 'remove' in opts and opts['remove'] :
+    removeblacklistrule(ui,conn,args,opts)
+  elif 'add' in opts and opts['add'] :
+    addblacklistrule(ui,conn,args,opts)
+  else :
+    ui.warn( 'invalid operation specified\n' )
+    
+  conn.close( )  
+ 
+####### Database setup methods
+# this part derived from mozilla's pushlog.py hook
+def openconn(ui,repo):
+  blacklistdb = os.path.join(repo.path, 'blacklist.db')
+  createdb = False
+  if not os.path.exists(blacklistdb):
+    createdb = True
+  conn = sqlite.connect(blacklistdb)
+  if not createdb and not schemaexists(conn):
+    createdb = True
+  if createdb:
+    createblacklistdb(ui,conn)
+    st = os.stat(blacklistdb)
+    os.chmod(blacklistdb, st.st_mode | stat.S_IWGRP)
+
+  return conn
+
+# Derived from mozilla's pushlog hook
+def schemaexists(conn):
+    return 3 == conn.execute("SELECT COUNT(*) FROM SQLITE_MASTER WHERE name IN ( ?, ?, ?)" , ['blacklist_rule','blacklist_auditlog','blacklist_blocklog']).fetchone()[0]
+
+# Derived from mozilla's pushlog hook
+def createblacklistdb(ui,conn):
+    # record of different blacklist rule, type should be either 'node' or 'file' or 'user'
+    # 'node' - compare pattern with changeset identifier
+    # 'file' - used as regular expression against changeset file manifest
+    # 'user' - used as regular expression against changeset author/user
+    # (id,pattern,type,enabled)
+    conn.execute("CREATE TABLE IF NOT EXISTS blacklist_rule (id INTEGER PRIMARY KEY AUTOINCREMENT, pattern TEXT, type TEXT, enabled INTEGER,comment TEXT)")
+    conn.execute("CREATE UNIQUE INDEX IF NOT EXISTS blacklist_rule_idx ON blacklist_rule (pattern,type)" )
+ 
+    # records additions and modifications to the blacklist_rule table
+    # (id, operation, rule_id, user, date, comment)
+    conn.execute("CREATE TABLE IF NOT EXISTS blacklist_auditlog (id INTEGER PRIMARY KEY AUTOINCREMENT, operation TEXT, rule_id INTEGER, user TEXT, date INTEGER, comment TEXT)")
+    conn.execute("CREATE INDEX IF NOT EXISTS blacklist_auditlog_rule_idx ON blacklist_auditlog (rule_id)" )
+
+    # log attempted pushes and the http users trying to push a blocked changeset
+    # (id,rule_id,cset_id, cset_user, cset_desc, user,date)
+    conn.execute("CREATE TABLE IF NOT EXISTS blacklist_blocklog (id INTEGER PRIMARY KEY AUTOINCREMENT, rule_id INTEGER, cset_id TEXT, cset_user TEXT, cset_desc TEXT, user TEXT, date INTEGER)")
+    conn.execute("CREATE INDEX IF NOT EXISTS blacklist_blocklog_rule_idx ON blacklist_blocklog (rule_id)" )
+
+    conn.commit()
+
+      
+# Methods for extension commands      
+def __getblacklistruletype( ui, pattern, opts ):
+  type=None
+    
+  if opts['nodeType'] :
+    type = 'node'
+  elif opts['fileType'] :
+    type = 'file'
+  elif opts['userType'] :
+    type = 'user'
+
+  # try and work out type of blacklist if none specified
+  # default to regexp
+  if type == None :
+    if re.match( NODE_RE, pattern ) :
+      type = 'node'
+    elif '@' in pattern :
+      type = 'user'
+    else :
+      type = 'file'
+    ui.note( 'type implicitly set to \'%s\'\n' % type )  
+
+  return type
+
+def addblacklistrule(ui,conn,args,opts):
+  ret = 1
+  if len(args) == 1 :
+    createrule = True
+    pattern = args[0]
+
+    type = __getblacklistruletype( ui, pattern, opts )
+
+    if type == 'node' :
+      # if pattern has been specified as a node type
+      # check that pattern is a valid node
+      if not re.match( NODE_RE, pattern ) :
+        ui.warn( 'node should be 12 or 40 characters.\n' )
+        createrule = False 
+    
+    if createrule :
+      comment = None
+      
+      if 'desc' in opts and opts['desc'] :
+        if opts['desc'] != '' :
+          comment = opts['desc']
+      
+      insertblacklistrule(ui,conn,pattern,type, comment=comment)
+  else :
+    ui.warn( 'missing pattern argument.\n' )
+    
+  return ret      
+    
+def removeblacklistrule(ui,conn,args,opts):
+  if len(args) == 1 :
+    deleteblacklistrule(ui,conn,args[0])
+  else :
+    ui.warn( 'rule id argument required.\n' )
+  
+  return 0
+    
+def disableblacklistrule(ui,conn,args,opts):
+  if len(args) == 1 :
+    updateblacklistrule(ui,conn,args[0],False)
+  else :
+    ui.warn( 'rule id argument required.\n' )
+  
+  return 0    
+    
+def enableblacklistrule(ui,conn,args,opts):
+  if len(args) == 1 :
+    updateblacklistrule(ui,conn,args[0],True)
+  else :
+    ui.warn( 'rule id argument required.\n' )
+  
+  return 0    
+    
+def listblacklistrule(ui,conn,args,opts):
+  if len(args) in (0,1) :
+    res = selectblacklistrule(ui,conn,args)
+    
+    printblacklist(ui,res)
+  else :
+    ui.warn( 'too many arguments.\n' )
+    
+  return 0
+
+def listblacklistauditlog(ui,conn,args,opts):
+  if len(args) in (0,1) :
+    res = selectblacklistauditlog(ui, conn, args )
+        
+    printauditlog(ui,res)
+  else :
+    ui.warn( 'too many arguments.\n' )
+    
+  return 0
+
+def listblacklistblocklog(ui,conn,args,opts):
+  if len(args) in (0,1) :
+    res = selectblacklistblocklog(ui, conn, args )
+        
+    printblocklog(ui,res)
+  else :
+    ui.warn( 'too many arguments.\n' )
+    
+  return 0
+
+def insertblacklistaudit(ui, conn, operation, rule_id, comment=None ):
+  user = __getenvuser( )
+  audit_date = int(time.time())
+
+  audit_sql = 'INSERT INTO blacklist_auditlog ( operation, rule_id, user, date, comment ) VALUES ( ?, ?, ?, ?, ? )'
+  conn.execute( audit_sql, (operation, rule_id, user, audit_date, comment ) )
+
+def insertblacklistrule(ui, conn, pattern, type, enabled=True, comment=None):
+  rule_sql = 'INSERT INTO blacklist_rule ( pattern, type, enabled,comment ) VALUES ( ?, ?, ?, ? )'
+  
+  res = conn.execute( rule_sql, (pattern,type,enabled,comment) )
+  rule_id= res.lastrowid
+  
+  insertblacklistaudit(ui, conn, 'add', rule_id,comment=comment )
+                     
+  conn.commit( )
+
+def __getenvuser( ):
+  # look at REMOTE_USER first  
+  # then look at LOGUSER
+  # then look at USER
+  for e in ['REMOTE_USER','SUDO_USER','LOGUSER','USER'] :
+    if e in os.environ :
+      user = '%s:%s' %( e, os.environ.get( e ) )
+      break
+
+  return user
+
+def insertblacklistblocklog( ui, conn, rule, ctx ):
+  # (id, rule_id, user, date)
+  rule_id=rule[0]
+
+  log_user = __getenvuser( )
+  audit_date = int(time.time())
+  
+  ctx_node = binascii.hexlify(ctx.node())
+  ctx_user = ctx.user()
+  ctx_desc = ctx.description()
+  
+  log_sql = 'INSERT INTO blacklist_blocklog (rule_id,user,date,cset_id,cset_user,cset_desc) VALUES (?,?,?,?,?,?)'
+  conn.execute( log_sql, (rule_id,log_user,audit_date, ctx_node, ctx_user, ctx_desc))
+  conn.commit()    
+
+def updateblacklistrule(ui, conn, rule_id, enabled):
+  rule_sql = 'UPDATE blacklist_rule SET enabled=? WHERE id=?'
+  
+  conn.execute( rule_sql, [enabled, rule_id] )
+  
+  insertblacklistaudit(ui, conn, 'update', rule_id, 'enabled=%s' % enabled )
+  
+  conn.commit( )
+  
+def deleteblacklistrule(ui, conn, rule_id ):
+  if rule_id != None :
+    res = selectblacklistrule(ui, conn, rule_id )
+    processed = False
+    for (id,pattern,type,enabled,comment) in res :
+      comment = 'deleted: pattern=%s, type=%s, enabled=%s' % (pattern, type, enabled)
+  
+      rule_sql = 'DELETE FROM blacklist_rule WHERE id=?'
+      conn.execute( rule_sql, [rule_id] )
+  
+      insertblacklistaudit(ui, conn, 'delete', rule_id, comment)      
+
+      conn.commit( )
+      processed = True
+      
+    if not processed :
+      ui.warn( 'no matching blacklist rule found with id %s\n' % rule_id )
+  else :
+    ui.warn( 'no rule id specified\n' )
+
+def selectblacklistrule(ui, conn, rule_id ):
+  # (id, operation, rule_id, user, date, comment)
+  if rule_id :
+    rule_sql = 'SELECT id,pattern,type,enabled,comment FROM blacklist_rule WHERE id=? ORDER BY id ASC'
+    res = conn.execute( rule_sql, rule_id )
+  else :
+    rule_sql = 'SELECT id,pattern,type,enabled,comment FROM blacklist_rule ORDER BY id ASC'
+    res = conn.execute( rule_sql )
+
+  return res  
+  
+def selectblacklistauditlog(ui,conn,rule_id=None) :
+  # (id, operation, rule_id, user, date, comment)
+  if rule_id :
+    rule_sql = 'SELECT id,operation,rule_id,user,date,comment FROM blacklist_auditlog WHERE rule_id=? ORDER BY date ASC'
+    res = conn.execute( rule_sql, rule_id )
+  else :
+    rule_sql = 'SELECT id,operation,rule_id,user,date,comment FROM blacklist_auditlog ORDER BY date ASC'
+    res = conn.execute( rule_sql )
+
+  return res
+
+def selectblacklistblocklog(ui,conn,rule_id=None) :
+  # (id, rule_id, node, user, date)
+  if rule_id :
+    rule_sql = 'SELECT id,rule_id,cset_id,cset_user,cset_desc,user,date FROM blacklist_blocklog WHERE rule_id=? ORDER BY date ASC'
+    res = conn.execute( rule_sql, rule_id )
+  else :
+    rule_sql = 'SELECT id,rule_id,cset_id,cset_user,cset_desc,user,date FROM blacklist_blocklog ORDER BY date ASC'
+    res = conn.execute( rule_sql )
+
+  return res  
+  
+def printblacklist(ui,res):
+  for r in res :
+    (id,pattern,type,enabled,comment) = r  
+  
+    if enabled == 1 :
+      enabled = True
+    elif enabled == 0 :
+      enabled = False
+
+    ui.write( 'rule:     %d:%s\n' % (id,type) )
+    ui.write( 'pattern:  %s\n' % pattern )
+    ui.write( 'enabled:  %s\n' % enabled )
+    if comment :
+      ui.write( 'comment:  %s\n' % comment )
+    ui.write( '\n' )
+
+def printauditlog(ui,res):
+  for r in res :
+    (id, operation, rule_id, user, date, comment) = r
+     
+    date = datetime.utcfromtimestamp(date).isoformat()  
+     
+    if not comment :
+      comment = '' 
+     
+    ui.write( 'date:      %s\n' % date )
+    ui.write( 'operation: %s\n' % operation )
+    ui.write( 'user:      %s\n' % user )
+    ui.write( 'rule:      %s\n' % rule_id )
+    ui.write( 'comment:   %s\n' % comment )
+    ui.write( '\n' )
+
+def printblocklog(ui,res):
+  for r in res :
+    (id, rule_id, cset_id, cset_user, cset_desc, user, date) = r
+     
+    date = datetime.utcfromtimestamp(date).isoformat()  
+     
+    ui.write( 'cset:      %s\n' % cset_id )
+    ui.write( 'cset-user: %s\n' % cset_user)
+    ui.write( 'cset-desc: %s\n' % cset_desc )
+    ui.write( 'rule:      %s\n' % rule_id )
+    ui.write( 'date:      %s\n' % date )
+    ui.write( 'user:      %s\n' % user )
+
+    ui.write( '\n' )
+
+
+# Hook specific functions follow
+
+def excludecsetbyfile(ctx,pattern):
+  exclude = False
+  
+  file_re = re.compile( '%s' % pattern, re.I )
+  for f in ctx.files() :
+    if file_re.match( f ) :
+      exclude = True
+      break
+
+  return exclude
+
+def excludecsetbynode(ctx,pattern):
+  exclude = False
+  
+  node = binascii.hexlify(ctx.node())
+  
+  if node.startswith( pattern ) :
+    exclude = True
+
+  return exclude
+
+def excludecsetbyuser(ctx,pattern):
+  exclude = False
+  userStr = ctx.user()
+  
+  user_re = re.compile( '^.*%s.*$' % pattern, re.I )
+  if user_re.match( userStr ) :
+    exclude = True
+ 
+  return exclude  
+
+def excludeblacklistcset(ui,conn,ctx):
+
+  bl_sql = 'SELECT id,pattern,type FROM blacklist_rule WHERE enabled=1'
+  res = conn.execute( bl_sql )
+  
+  (exclude,rule) = (False,None)
+  
+  for (id,pattern,type) in res :
+    if type == 'node' :
+      exclude = excludecsetbynode(ctx,pattern)
+    elif type == 'user' :
+      exclude = excludecsetbyuser(ctx,pattern)
+    elif type == 'file' :
+      exclude = excludecsetbyfile(ctx,pattern)
+    else :
+      ui.warn('unrecognised rule type \'%s\'' % type )
+
+    if exclude :
+      rule = (id,pattern,type)
+      break
+
+  return (exclude,rule)
+
+# The hook method that is used to block bad changesets from being introduced 
+# to the current repository
+def pretxnchangegroup(ui,repo,hooktype,node,**args):
+  start = repo[node].rev()
+  end = len(repo)
+
+  conn = openconn(ui, repo )
+
+  blocked = False
+
+  for rev in xrange(start, end):
+    ctx = repo[rev]
+    (blocked,rule) = excludeblacklistcset( ui, conn, ctx)
+
+    if blocked :
+      insertblacklistblocklog( ui, conn, rule, ctx )
+      (id,pattern,type) = rule
+      ui.write( 'blocked: cset %s in changegroup blocked by blacklist\n' % str(ctx) )
+      ui.write( 'blocked-reason: %s matched against \'%s\'\n' % ( type,pattern ))
+      break
+  
+  conn.close( )    
+  
+  return blocked
+
+def setupblacklisthook(ui):
+  ui.setconfig('hooks', 'pretxnchangegroup.blacklist', pretxnchangegroup)
+
+def reposetup(ui,repo):
+  # print 'in blacklist reposetup'
+  setupblacklisthook( ui )
+
+def uisetup(ui):
+  # print 'in blacklist uisetup'
+  setupblacklisthook( ui )
+
+cmdtable = {
+            'blacklist': (blacklist,
+                          [
+                           ('l','list',None,'list blacklist entries'),
+                           ('','blocklog',None,'list blocked changesets'),
+                           ('','auditlog',None,'show audit log for blacklist'),
+                           ('a','add',None,'add node to blacklist'),
+                           ('d','disable',None,'disable blacklist rule'),
+                           ('e','enable',None,'enable blacklist rule'),
+                           ('r','remove',None,'remove node from blacklist'),
+                           ('n','nodeType',False,'parse argument as node to blacklist'),
+                           ('f','fileType',False,'parse argument as file path to blacklist'),
+                           ('u','userType',False,'parse argument as user regexp to blacklist'),
+                           ('','desc','','comment to attach to rule')],
+                          "")
+            }