From: Joerg Jaspert <joerg@debian.org>
Date: Fri, 21 Mar 2008 20:45:01 +0000 (+0100)
Subject: Merge from aj
X-Git-Url: https://git.decadent.org.uk/gitweb/?a=commitdiff_plain;ds=inline;h=d09fa44171761953d04c94f57bafe3399a9154f2;p=dak.git

Merge from aj
---

d09fa44171761953d04c94f57bafe3399a9154f2
diff --cc dak/transitions.py
index 00000000,d1d62cdf..3cac07af
mode 000000,100755..100755
--- a/dak/transitions.py
+++ b/dak/transitions.py
@@@ -1,0 -1,385 +1,385 @@@
+ #!/usr/bin/env python
+ 
+ # Display, edit and check the release manager's transition file.
+ # Copyright (C) 2008 Joerg Jaspert <joerg@debian.org>
+ 
+ # 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ 
+ ################################################################################
+ 
+ # <elmo> if klecker.d.o died, I swear to god, I'm going to migrate to gentoo.
+ 
+ ################################################################################
+ 
+ import os, pg, sys, time, errno, fcntl, tempfile, pwd
+ import apt_pkg
+ import daklib.database
+ import daklib.utils
+ import syck
+ 
+ # Globals
+ Cnf = None
+ Options = None
+ projectB = None
+ 
+ ################################################################################
+ 
+ def init():
+     global Cnf, Options, projectB
+ 
+     apt_pkg.init()
+ 
+     Cnf = daklib.utils.get_conf()
+ 
+     Arguments = [('h',"help","Edit-Transitions::Options::Help"),
+                  ('e',"edit","Edit-Transitions::Options::Edit"),
+                  ('i',"import","Edit-Transitions::Options::Import", "HasArg"),
+                  ('c',"check","Edit-Transitions::Options::Check"),
+                  ('s',"sudo","Edit-Transitions::Options::Sudo"),
+                  ('n',"no-action","Edit-Transitions::Options::No-Action")]
+ 
+     for i in ["help", "no-action", "edit", "import", "check", "sudo"]:
+         if not Cnf.has_key("Edit-Transitions::Options::%s" % (i)):
+             Cnf["Edit-Transitions::Options::%s" % (i)] = ""
+ 
+     apt_pkg.ParseCommandLine(Cnf, Arguments, sys.argv)
+ 
+     Options = Cnf.SubTree("Edit-Transitions::Options")
+ 
+     whoami = os.getuid()
+     whoamifull = pwd.getpwuid(whoami)
+     username = whoamifull[0]
+     if username != "dak":
+         print "Non-dak user: %s" % username
+         Options["sudo"] = "y"
+ 
+     projectB = pg.connect(Cnf["DB::Name"], Cnf["DB::Host"], int(Cnf["DB::Port"]))
+     daklib.database.init(Cnf, projectB)
+     
+     if Options["help"]:
+         usage()
+ 
+ ################################################################################
+ 
+ def usage (exit_code=0):
+     print """Usage: transitions [OPTION]...
+ Update and check the release managers transition file.
+ transitions.
+ 
+ Options:
+ 
+   -h, --help                show this help and exit.
+   -e, --edit                edit the transitions file
+   -i, --import <file>       check and import transitions from file
+   -c, --check               check the transitions file, remove outdated entries
+   -S, --sudo                use sudo to update transitions file
+   -n, --no-action           don't do anything"""
+ 
+     sys.exit(exit_code)
+ 
+ ################################################################################
+ 
+ def load_transitions(trans_file):
+     # Parse the yaml file
+     sourcefile = file(trans_file, 'r')
+     sourcecontent = sourcefile.read()
+     try:
+         trans = syck.load(sourcecontent)
+     except syck.error, msg:
+         # Someone fucked it up
+         print "ERROR: %s" % (msg)
+         return None
+     # could do further validation here
+     return trans
+ 
+ ################################################################################
+ 
+ def lock_file(file):
+     for retry in range(10):
+         lock_fd = os.open(file, os.O_RDWR | os.O_CREAT)
+         try:
+             fcntl.lockf(lock_fd, fcntl.LOCK_EX | fcntl.LOCK_NB)
+             return lock_fd
+         except OSError, e:
+             if errno.errorcode[e.errno] == 'EACCES' or errno.errorcode[e.errno] == 'EEXIST':
+                 print "Unable to get lock for %s (try %d of 10)" % \
+                         (file, retry+1)
+                 time.sleep(60)
+             else:
+                 raise
+ 
+     daklib.utils.fubar("Couldn't obtain lock for %s." % (lockfile))
+ 
+ ################################################################################
+ 
+ def write_transitions(from_trans):
+     """Update the active transitions file safely.
+        This function takes a parsed input file (which avoids invalid
+        files or files that may be be modified while the function is
+        active), and ensure the transitions file is updated atomically
+        to avoid locks."""
+ 
+     trans_file = Cnf["Dinstall::Reject::ReleaseTransitions"]
+     trans_temp = trans_file + ".tmp"
+   
+     trans_lock = lock_file(trans_file)
+     temp_lock  = lock_file(trans_temp)
+ 
+     destfile = file(trans_temp, 'w')
+     syck.dump(from_trans, destfile)
+     destfile.close()
+ 
+     os.rename(trans_temp, trans_file)
+     os.close(temp_lock)
+     os.close(trans_lock)
+ 
+ ################################################################################
+ 
+ class ParseException(Exception):
+     pass
+ 
+ def write_transitions_from_file(from_file):
+     """We have a file we think is valid; if we're using sudo, we invoke it
+        here, otherwise we just parse the file and call write_transitions"""
+ 
+     if Options["sudo"]:
+         os.spawnl(os.P_WAIT, "/usr/bin/sudo", "/usr/bin/sudo", "-u", "dak", "-H", 
+               "/usr/local/bin/dak", "transitions", "--import", from_file)
+     else:
+         trans = load_transitions(from_file)
+         if trans is None:
+             raise ParseException, "Unparsable transitions file %s" % (file)
+         write_transitions(trans)
+ 
+ ################################################################################
+ 
+ def temp_transitions_file(transitions):
+     # NB: file is unlinked by caller, but fd is never actually closed.
+ 
+     (fd, path) = tempfile.mkstemp("","transitions")
+     f = open(path, "w")
+     syck.dump(transitions, f)
+     return path
+ 
+ ################################################################################
+ 
+ def edit_transitions():
+     trans_file = Cnf["Dinstall::Reject::ReleaseTransitions"]
+     edit_file = temp_transitions_file(load_transitions(trans_file))
+ 
+     editor = os.environ.get("EDITOR", "vi")
+ 
+     while True:
+         result = os.system("%s %s" % (editor, edit_file))
+         if result != 0:
+             os.unlink(edit_file)
+             daklib.utils.fubar("%s invocation failed for %s, not removing tempfile." % (editor, edit_file))
+     
+         # Now try to load the new file
+         test = load_transitions(edit_file)
+ 
+         if test == None:
+             # Edit is broken
 -	    print "Edit was unparsable."
++            print "Edit was unparsable."
+             prompt = "[E]dit again, Drop changes?"
 -	    default = "E"
 -	else:
 -	    print "Edit looks okay.\n"
++            default = "E"
++        else:
++            print "Edit looks okay.\n"
+             print "------------------------------------------------------------------------"
+             transition_info(test)
+ 
+ 	    prompt = "[S]ave, Edit again, Drop changes?"
+ 	    default = "S"
+ 
+         answer = "XXX"
+         while prompt.find(answer) == -1:
+             answer = daklib.utils.our_raw_input(prompt)
+             if answer == "":
+                 answer = default
+             answer = answer[:1].upper()
+ 
+         if answer == 'E':
+             continue
+         elif answer == 'D':
+             os.unlink(edit_file)
+             print "OK, discarding changes"
+             sys.exit(0)
+         elif answer == 'S':
+             # Ready to save
+             break
 -	else:
 -	    print "You pressed something you shouldn't have :("
 -	    sys.exit(1)
++        else:
++            print "You pressed something you shouldn't have :("
++            sys.exit(1)
+ 
+     # We seem to be done and also have a working file. Copy over.
+     write_transitions_from_file(edit_file)
+     os.unlink(edit_file)
+ 
+     print "Transitions file updated."
+ 
+ ################################################################################
+ 
+ def check_transitions(transitions):
+     to_dump = 0
+     to_remove = []
+     # Now look through all defined transitions
+     for trans in transitions:
+         t = transitions[trans]
+         source = t["source"]
+         expected = t["new"]
+ 
+         # Will be None if nothing is in testing.
+         current = daklib.database.get_suite_version(source, "testing")
+ 
+         print_info(trans, source, expected, t["rm"], t["reason"], t["packages"])
+ 
+         if current == None:
+             # No package in testing
+             print "Transition source %s not in testing, transition still ongoing." % (source)
+         else:
+             compare = apt_pkg.VersionCompare(current, expected)
+             if compare < 0:
+                 # This is still valid, the current version in database is older than
+                 # the new version we wait for
+                 print "This transition is still ongoing, we currently have version %s" % (current)
+             else:
+                 print "REMOVE: This transition is over, the target package reached testing. REMOVE"
+                 print "%s wanted version: %s, has %s" % (source, expected, current)
+                 to_remove.append(trans)
+                 to_dump = 1
+         print "-------------------------------------------------------------------------"
+ 
+     if to_dump:
+         prompt = "Removing: "
+         for remove in to_remove:
+             prompt += remove
+             prompt += ","
+ 
+         prompt += " Commit Changes? (y/N)"
+         answer = ""
+ 
+         if Options["no-action"]:
+             answer="n"
+         else:
+             answer = daklib.utils.our_raw_input(prompt).lower()
+ 
+         if answer == "":
+             answer = "n"
+ 
+         if answer == 'n':
+             print "Not committing changes"
+             sys.exit(0)
+         elif answer == 'y':
+             print "Committing"
+             for remove in to_remove:
+                 del transitions[remove]
+     
+             edit_file = temp_transitions_file(transitions)
+             write_transitions_from_file(edit_file)
+ 
+             print "Done"
+         else:
+             print "WTF are you typing?"
+             sys.exit(0)
+ 
+ ################################################################################
+ 
+ def print_info(trans, source, expected, rm, reason, packages):
+         print """Looking at transition: %s
+  Source:      %s
+  New Version: %s
+  Responsible: %s
+  Description: %s
+  Blocked Packages (total: %d): %s
+ """ % (trans, source, expected, rm, reason, len(packages), ", ".join(packages))
+         return
+ 
+ ################################################################################
+ 
+ def transition_info(transitions):
+     for trans in transitions:
+         t = transitions[trans]
+         source = t["source"]
+         expected = t["new"]
+ 
+         # Will be None if nothing is in testing.
+         current = daklib.database.get_suite_version(source, "testing")
+ 
+         print_info(trans, source, expected, t["rm"], t["reason"], t["packages"])
+ 
+         if current == None:
+             # No package in testing
+             print "Transition source %s not in testing, transition still ongoing." % (source)
+         else:
+             compare = apt_pkg.VersionCompare(current, expected)
+             print "Apt compare says: %s" % (compare)
+             if compare < 0:
+                 # This is still valid, the current version in database is older than
+                 # the new version we wait for
+                 print "This transition is still ongoing, we currently have version %s" % (current)
+             else:
+                 print "This transition is over, the target package reached testing, should be removed"
+                 print "%s wanted version: %s, has %s" % (source, expected, current)
+         print "-------------------------------------------------------------------------"
+ 
+ ################################################################################
+ 
+ def main():
+     global Cnf
+ 
+     init()
+     
+     # Check if there is a file defined (and existant)
+     transpath = Cnf.get("Dinstall::Reject::ReleaseTransitions", "")
+     if transpath == "":
+         daklib.utils.warn("Dinstall::Reject::ReleaseTransitions not defined")
+         sys.exit(1)
+     if not os.path.exists(transpath):
+         daklib.utils.warn("ReleaseTransitions file, %s, not found." %
+                           (Cnf["Dinstall::Reject::ReleaseTransitions"]))
+         sys.exit(1)
+    
+     if Options["import"]:
+         try:
+             write_transitions_from_file(Options["import"])
+         except ParseException, m:
+             print m
+             sys.exit(2)
+         sys.exit(0)
+ 
+     # Parse the yaml file
+     transitions = load_transitions(transpath)
+     if transitions == None:
+         # Something very broken with the transitions, exit
+         daklib.utils.warn("Could not parse existing transitions file. Aborting.")
+         sys.exit(2)
+ 
+     if Options["edit"]:
+         # Let's edit the transitions file
+         edit_transitions()
+     elif Options["check"]:
+         # Check and remove outdated transitions
+         check_transitions(transitions)
+     else:
+         # Output information about the currently defined transitions.
+         print "Currently defined transitions:"
+         transition_info(transitions)
+ 
+     sys.exit(0)
+     
+ ################################################################################
+ 
+ if __name__ == '__main__':
+     main()