Merge lp:~arsenal-devel/arsenal/python-launchpadlib-toolkit into lp:arsenal/trunk

[Brian Murray]

example-ls-series.py wasn't working for me so I fixed it and as I was adding in load_distro_series I noticed some more die statements in LaunchpadService.py so I fixed those.

[Bryce Harrington (bryce)]

Hi brian, looks good merged.

(Something was wrong with the merge proposal, so I just merged from your branch directly.)

[Bryce Harrington (bryce)]

review: Approve

=== added file 'AUTHORS'
--- AUTHORS	1970-01-01 00:00:00 +0000
+++ AUTHORS	2010-03-11 21:15:48 +0000
@@ -0,0 +1,5 @@
+Maintainers:
+        Bryce Harrington <[e-mail]>
+
+Contributions, ideas, and inspiration from:
+        Markus Korn <[e-mail]>
 
=== renamed file 'AUTHORS' => 'AUTHORS.moved'
=== added file 'COPYING'
--- COPYING	1970-01-01 00:00:00 +0000
+++ COPYING	2010-03-11 21:15:48 +0000
@@ -0,0 +1,341 @@
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=== added file 'COPYING.LIB'
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+++ COPYING.LIB	2010-03-11 21:15:48 +0000
@@ -0,0 +1,510 @@
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+
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+  Random Hacker.
+
+  <signature of Ty Coon>, 1 April 1990
+  Ty Coon, President of Vice
+
+That's all there is to it!
+
+
 
=== added file 'NEWS'
--- NEWS	1970-01-01 00:00:00 +0000
+++ NEWS	2010-03-11 21:15:48 +0000
@@ -0,0 +1,26 @@
+
+
+Sept 29, 2009 - Version 0.1
+===========================
+This is a first draft of the python-launchpadlib-toolkit package.  The
+principle motivation is the widespread duplication of effort in
+implementing credential handling across a vast array of launchpadlib
+applications.
+
+At Plumbers' it seems there is strong desire for more collaboration
+between LPL scripters.  Since pretty much every LPL script needs to do
+credentials management, standardizing this into a sharable library seems
+like a logical first step.
+
+There's so much similarity from one credentials implementation to
+another that this probably could have started from anyone's code.  I
+opted to start with my own implementation from Arsenal since that's the
+one I'm most familiar with.  I've integrated some good implementation
+ideas from Markus Korn's work on ilaunchpad-shell and ubuntu-dev-tools,
+such as the nifty DebugStdOut trickery, the use of environment variables
+for configuration, and the essense of his HTTPError exception handling.
+
+One of my major design goals was to keep it simple, so there's been
+several ideas I've left out simply on the grounds that I wasn't sure if
+they'd be that useful in real-world cases.  Stuff can always be added
+later as it's proven necessary!
 
=== added file 'README'
--- README	1970-01-01 00:00:00 +0000
+++ README	2010-03-11 21:15:48 +0000
@@ -0,0 +1,116 @@
+LaunchpadLib Toolkit
+====================
+lpltoolkit is a set of classes for interacting with the Launchpad
+service API library.  It takes care of certain common chores such as
+obtaining and managing login credentials.
+
+By factoring this common code out of individual launchpadlib projects,
+it makes them more concise and more compatible with one another.
+
+
+Basic Usage
+===========
+For most purposes, simply create the LaunchpadService object, which will
+attend to the credentials automatically.  Then retrieve a project object
+(such as "ubuntu") and from there you can use all the regular Launchpad
+API calls.  In other words:
+
+  import lpltoolkit
+
+  lp   = lpltoolkit.LaunchpadService()
+  prj  = lp.load_project("ubuntu")
+
+
+See example-ls-series.py for a complete working example.  Also try
+running it with LPDEBUG turned on to see how to get debug info:
+
+  $ ./example-ls-series.py
+
+  $ LPDEBUG=1 ./example-ls-series.py
+
+For more elaborate real-world scripts, refer to the Arsenal project at:
+
+  http://launchpad.net/arsenal
+
+
+Environment Variables
+=====================
+Configuration of the LaunchpadService behavior can be done via
+environmental variables.  This is done principly to make it easy to
+debug issues without needing to tweak source code.
+
+The following environment variables are supported:
+
+  LPDEBUG       Prints extra debugging messages to stderr if defined.
+                If set to a numerical argument, it sets the httpdlib2
+                debuglevel to that value; the http debug output will be
+                filtered to redact your oauth token and signature, so
+                you can attach debug info to public bugs without
+                revealing anything sensitive.
+
+  LPSTAGING     Use the staging service root rather than the live (edge)
+                service.  This allows testing of your script without
+                risking actual changes to the official Launchpad.
+
+  LPCONFIG      Use this directory path for configuration files, rather
+                than the default of ~/.config/<consumer>.  The directory
+                will be created if it does not already exist.
+
+  LPCACHE       Use this directory path for cache files (such as credentials),
+                rather than the default of ~/.cache/<consumer>.  The
+                directory will be created if it does not already exist.
+
+
+API - LaunchpadService
+======================
+
+lp = LaunchpadService([config_path], [cache_path], [consumer])
+
+     Creates the Launchpad service object and retrieve credentials from
+     Launchpad.  LPSTAGING, LPCONFIG, and LPCACHE must be specified
+     prior to instantiating the LaunchpadService object in order to have
+     any effect.
+
+     config_path and cache_path allow the calling script to define the
+     default paths if not specified by the environment variables.
+
+     On any unrecoverable error an exception is thrown.
+
+lp.load_project(project)
+
+     Loads the named project (such as "ubuntu" distro), returning its
+     launchpadapi object.
+
+lp.reset()
+
+     Reloads the credentials and project (if any is specified).  This is
+     handy for recovering from Launchpad out-of-service or other such
+     transient errors.
+
+lp.name:              The credentialed consumer name (default: lpltoolkit)
+lp.launchpad:         The launchpadlib launchpad object
+lp.project:           The loaded Launchpad project (default: None)
+
+
+API - Debug
+===========
+dbg(msg), err(msg), die(msg)
+
+     Convenience routines for printing error and debug messages to
+     stderr.  dbg() only prints if LPDEBUG is defined.
+
+StdOut, DebugStdOut
+
+     STDOUT overloads for debug output filtering.  Set sys.stdout to
+     DebugStdOut to filter out oauth token and signature details.
+
+
+Wishlist
+========
+* Get this package into Universe, then into Main
+* Add a framework for storing config elements beyond just credentials
+* Integrate into existing launchpadlib scripts/applications
+* Wrapper classes for Bugs, SourcePackages, etc.
+* Strengthen the fault handling, provide better diagnostics, and be more
+  robust against Launchpad service failures
+
 
=== renamed file 'README' => 'README.moved'
=== added directory 'debian'
=== renamed directory 'debian' => 'debian.moved'
=== added file 'debian/changelog'
--- debian/changelog	1970-01-01 00:00:00 +0000
+++ debian/changelog	2010-03-11 21:15:48 +0000
@@ -0,0 +1,21 @@
+python-launchpadlib-toolkit (UNRELEASED) karmic; urgency=low
+
+  * Fix parameter name in debug routine.
+
+ -- Bryce Harrington <[e-mail]>  Thu, 15 Oct 2009 18:51:22 -0700
+
+python-launchpadlib-toolkit (0.2) karmic; urgency=low
+
+  * Add handling of socket.error exceptions, which can be triggered when
+    the Launchpad service is unreachable (such as from a busted router).
+
+ -- Bryce Harrington <[e-mail]>  Tue, 06 Oct 2009 11:19:08 -0700
+
+python-launchpadlib-toolkit (0.1) karmic; urgency=low
+
+  * New revision, split off from arsenal, with ideas brazenly thieved from
+    Markus Korn's launchpadlib-shell.
+  * debian packaging borrowed/adapted from python-launchpad-bugs
+
+ -- Bryce Harrington <[e-mail]>  Tue, 29 Sep 2009 16:16:09 -0700
+
 
=== added file 'debian/compat'
--- debian/compat	1970-01-01 00:00:00 +0000
+++ debian/compat	2010-03-11 21:15:48 +0000
@@ -0,0 +1,1 @@
+5
 
=== added file 'debian/control'
--- debian/control	1970-01-01 00:00:00 +0000
+++ debian/control	2010-03-11 21:15:48 +0000
@@ -0,0 +1,20 @@
+Source: python-launchpadlib-toolkit
+Section: python
+Priority: extra
+Maintainer: Arsenal Developers <[e-mail]>
+Build-Depends: cdbs (>= 0.4.43), debhelper (>= 5), python-central (>= 0.5), python-all-dev (>= 2.5)
+Standards-Version: 3.8.3
+XS-Vcs-Bzr: https://code.launchpad.net/~arsenal-devel/python-launchpadlib-toolkit/main
+XS-Python-Version: all
+
+Package: python-launchpadlib-toolkit
+Section: python
+Architecture: all
+Depends: ${python:Depends}, ${misc:Depends}, python (>= 2.5), python-launchpadlib
+XB-Python-Version: ${python:Versions}
+Description: convenience library for launchpadlib
+ Classes to manage credentials and access bug information
+ in Launchpad using the Launchpad API.
+ .
+ https://launchpad.net/arsenal/
+
 
=== added file 'debian/copyright'
--- debian/copyright	1970-01-01 00:00:00 +0000
+++ debian/copyright	2010-03-11 21:15:48 +0000
@@ -0,0 +1,34 @@
+This package was debianized by Bryce Harrington <[e-mail]> on
+Mon Sep 28 23:54:18 PDT 2009
+
+It was downloaded from 
+#TBD
+
+Upstream Author: 
+	Bryce Harrington <[e-mail]>
+
+Copyright: 
+	# Written by Bryce Harrington
+	# (C) Canonical, Ltd. Licensed under the GPL
+
+License:
+
+   This package 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 package 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 package; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+
+On Debian systems, the complete text of the GNU General
+Public License can be found in `/usr/share/common-licenses/GPL'.
+
+The Debian packaging is (C) 2006, Daniel Holbach <[e-mail]> and
+is licensed under the GPL, see above.
 
=== added file 'debian/docs'
--- debian/docs	1970-01-01 00:00:00 +0000
+++ debian/docs	2010-03-11 21:15:48 +0000
@@ -0,0 +1,1 @@
+README
 
=== added file 'debian/pycompat'
--- debian/pycompat	1970-01-01 00:00:00 +0000
+++ debian/pycompat	2010-03-11 21:15:48 +0000
@@ -0,0 +1,1 @@
+>= 2.4
 
=== added file 'debian/rules'
--- debian/rules	1970-01-01 00:00:00 +0000
+++ debian/rules	2010-03-11 21:15:48 +0000
@@ -0,0 +1,13 @@
+#!/usr/bin/make -f
+
+DEB_PYTHON_SYSTEM	:= pycentral
+
+include /usr/share/cdbs/1/rules/debhelper.mk
+include /usr/share/cdbs/1/class/python-distutils.mk
+
+DEB_BUILD_PROG:=debuild --preserve-envvar PATH --preserve-envvar CCACHE_DIR -us -uc $(DEB_BUILD_PROG_OPTS)
+arch-build::
+	rm -rf debian/arch-build
+	mkdir -p debian/arch-build/$(DEB_SOURCE_PACKAGE)-$(DEB_VERSION)
+	tar -c --exclude=arch-build --no-recursion -f - `bzr inventory` | (cd debian/arch-build/$(DEB_SOURCE_PACKAGE)-$(DEB_VERSION);tar xf -)
+	(cd debian/arch-build/$(DEB_SOURCE_PACKAGE)-$(DEB_VERSION) && $(DEB_BUILD_PROG))
 
=== added file 'example-ls-series.py'
--- example-ls-series.py	1970-01-01 00:00:00 +0000
+++ example-ls-series.py	2010-03-11 21:15:48 +0000
@@ -0,0 +1,22 @@
+#!/usr/bin/env python
+
+from lpltoolkit import LaunchpadService
+
+lp   = LaunchpadService()
+d    = lp.load_project("ubuntu")
+
+next_milestone = None
+for series in d.series:
+    print "%-10s %-20s %-25s" % (series.name,
+                                 series.status,
+                                 series.date_created)
+    if series.status == "Active Development" or series.status == "Pre-release Freeze":
+        for milestone in series.active_milestones:
+            print "%10s %-20s %-25s" % ("-->", milestone.name, milestone.date_targeted)
+            if milestone.date_targeted and not next_milestone:
+                next_milestone = milestone
+            elif next_milestone and milestone.date_targeted < next_milestone.date_targeted:
+                next_milestone = milestone
+
+print
+print "The next milestone is ", next_milestone.name
 
=== added directory 'lpltoolkit'
=== added file 'lpltoolkit/LaunchpadService.py'
--- lpltoolkit/LaunchpadService.py	1970-01-01 00:00:00 +0000
+++ lpltoolkit/LaunchpadService.py	2010-03-11 21:15:48 +0000
@@ -0,0 +1,142 @@
+# High level interface to Launchpad API to manage credentials
+# Derived from bits of ubuntutools in ubuntu-dev-tools and Arsenal
+
+import os, sys, socket
+import httplib2
+
+from launchpadlib.credentials import Credentials
+from launchpadlib.launchpad import Launchpad, STAGING_SERVICE_ROOT, EDGE_SERVICE_ROOT
+from launchpadlib.errors import HTTPError
+
+from lpltoolkit.debug import *
+
+class LaunchpadService:
+    ''' High level interface to the launchpad service API '''
+
+    def __init__(self, config_path=None, cache_path=None, consumer='lpltoolkit'):
+        ''' Construct Launchpad object, including obtaining launchpad credentials '''
+        self._project_name = None
+        self._configdir = None
+        self._cachedir = None
+        self._service_root = EDGE_SERVICE_ROOT
+        self.name = consumer
+        self.project = None
+        self.launchpad = None
+
+        ''' Debugging '''
+        if "LPDEBUG" in os.environ:
+            httplib2.debuglevel = os.getenv("LPDEBUG", None)
+            sys.stdout = DebugStdOut()
+
+        ''' Service root '''
+        if "LPSTAGING" in os.environ:
+            self._service_root = STAGING_SERVICE_ROOT
+        elif "LPEDGE" in os.environ:
+            self._service_root = EDGE_SERVICE_ROOT
+
+        home = os.path.expanduser('~')
+
+        ''' Config dir '''
+        if "LPCONFIG" in os.environ:
+            self._confdir = os.getenv("LPCONFIG", None)
+        elif config_path:
+            self._confdir = config_path
+        else:
+            self._confdir = os.path.join(home, '.config', self.name)
+            if not os.path.exists(self._confdir):
+                dbg("Creating config directory %s" %(self._confdir))
+                os.makedirs(self._confdir)
+        assert os.path.exists(self._confdir)
+
+        ''' Cache dir '''
+        if "LPCACHE" in os.environ:
+            self._cachedir = os.getenv("LPCACHE", None)
+        elif cache_path:
+            self._cachedir = cache_path
+        else:
+            self._cachedir = os.path.join(home, '.cache', self.name)
+        if not os.path.exists(self._cachedir):
+            dbg("Creating cache directory %s" %(self._cachedir))
+            os.makedirs(self._cachedir,0700)
+        assert os.path.exists(self._cachedir)
+
+        try:
+            self._get_creds()
+        except:
+            sys.stderr.write("Could not access Launchpad.")
+            sys.exit(1)
+        return None
+
+    def _get_creds(self):
+        ''' Credentials '''
+        retrieve_credentials = False
+        self._credentials_file = os.path.join(self._confdir, "lp-credentials.txt")
+        if not os.path.exists(self._credentials_file):
+            retrieve_credentials = True
+        else:
+            try:
+                credentials = Credentials()
+                dbg("Loading credentials from %s" %(self._credentials_file))
+                credentials.load(open(self._credentials_file))
+                self.launchpad = Launchpad(credentials, self._service_root, self._cachedir)
+            except socket.error:
+                excType, excValue, excTraceback = sys.exc_info()
+                dbg("  %s\n" %(excValue.response))
+                dbg("  %s\n" %(excValue.content))
+                sys.stderr.write("Launchpad service connection timed out")
+                sys.exit(1)
+                
+            except HTTPError:
+                # Can I use e.code here?
+                excType, excValue, excTraceback = sys.exc_info()
+                err("Failed to retrieve credentials from Launchpad")
+                dbg("  %s\n" %(excValue.response))
+                dbg("  %s\n" %(excValue.content))
+                retrieve_credentials = True
+
+        if retrieve_credentials:
+            dbg("Retrieving token and login")
+            try:
+                self.launchpad = Launchpad.get_token_and_login(self.name, self._service_root, self._cachedir)
+                credfd = open(self._credentials_file, "w")
+                os.chmod(self._credentials_file, 0600)
+                dbg("Saving retrieved credentials to %s" %(self._credentials_file))
+                self.launchpad.credentials.save(credfd)
+                credfd.close()
+            except:
+                sys.stderr.write("Could not set up Launchpad")
+                sys.exit(1)
+
+        return True
+
+    def reset(self):
+        self._get_creds()
+
+        if self._project_name:
+            dbg("Reloading project %s" %(self._project_name))
+            self.load_project(self._project_name)
+
+    def load_project(self, project):
+        try:
+            if self._service_root == STAGING_SERVICE_ROOT:
+                self.project = self.launchpad.load("https://api.staging.launchpad.net/beta/" + project)
+            else:
+                self.project = self.launchpad.load("https://api.edge.launchpad.net/beta/" + project)
+        except:
+            err("Exception cast loading project %s" % (project))
+            self.project = None
+
+        return self.project
+
+    def load_distro_series(self, distro, series):
+        try:
+            if self._service_root == STAGING_SERVICE_ROOT:
+                self.distro_series = self.launchpad.load("https://api.staging.launchpad.net/beta/%s/%s" % (distro, series))
+            else:
+                self.distro_series = self.launchpad.load("https://api.edge.launchpad.net/beta/%s/%s" % (distro, series))
+        except:
+            err("Exception cast loading distro %s and series %s" % (distro, series))
+            self.distro_series = None
+            sys.exit(1)
+
+        return self.distro_series
 
=== added file 'lpltoolkit/__init__.py'
--- lpltoolkit/__init__.py	1970-01-01 00:00:00 +0000
+++ lpltoolkit/__init__.py	2010-03-11 21:15:48 +0000
@@ -0,0 +1,3 @@
+from lpltoolkit.LaunchpadService import LaunchpadService
+from lpltoolkit.debug import dbg, err, die, StdOut, DebugStdOut, dump_launchpad_object
+
 
=== added file 'lpltoolkit/debug.py'
--- lpltoolkit/debug.py	1970-01-01 00:00:00 +0000
+++ lpltoolkit/debug.py	2010-03-11 21:15:48 +0000
@@ -0,0 +1,44 @@
+# Utility routines and classes for debugging info
+
+# (C) Copyright 2009, Markus Korn <[e-mail]>
+# (C) Copyright 2009, Bryce Harrington <[e-mail]>
+
+import re, os, sys
+
+def dbg(msg):
+    if "LPDEBUG" in os.environ:
+        sys.stderr.write("%s\n" %(msg))
+
+def err(msg):
+    sys.stderr.write("Error:  %s\n" %(msg))
+
+def die(msg):
+    sys.stderr.write("Fatal:  %s\n" %(msg))
+    sys.exit(1)
+
+StdOut = sys.stdout                                    
+class DebugStdOut(object):
+    '''
+    Debug version of STDOUT to redact out the oauth credentials
+    so that if the debug output is posted to a bug, it will not include
+    this sensitive info.
+    '''
+
+    RE_OAUTH_TOKEN = re.compile(r"oauth_token=\"([^\"]{2})[^\"]*")
+    RE_OAUTH_SIGNATURE = re.compile(r"oauth_signature=\"([^\"]{3})[^\"]*")
+
+    def write(self, txt):
+        txt = DebugStdOut.RE_OAUTH_SIGNATURE.sub(r"""oauth_signature="\1YYYYYYY""", txt)
+        txt = DebugStdOut.RE_OAUTH_TOKEN.sub(r"""oauth_token="\1XXXXXXXX""", txt)
+        StdOut.write(txt)
+        
+    def __getattr__(self, name):
+        return getattr(StdOut, name)
+
+def dump_launchpad_object(i):
+    print repr(i)
+    print " attr:  ", sorted(i.lp_attributes)
+    print " ops:   ", sorted(i.lp_operations)
+    print " coll:  ", sorted(i.lp_collections)
+    print " entr:  ", sorted(i.lp_entries)
+    print
 
=== added file 'setup.py'
--- setup.py	1970-01-01 00:00:00 +0000
+++ setup.py	2010-03-11 21:15:48 +0000
@@ -0,0 +1,20 @@
+#!/usr/bin/env python
+
+# Copyright (C) Canonical, Ltd.  Licensed under the GPL
+
+from distutils.core import setup
+import os
+import re
+
+# look/set what version we have
+changelog = "debian/changelog"
+if os.path.exists(changelog):
+    head=open(changelog).readline()
+    match = re.compile(".*\((.*)\).*").match(head)
+    if match:
+        version = match.group(1)
+
+setup(name     = 'python-launchpadlib-toolkit',
+      version  = version,
+      packages = ['lpltoolkit'],
+)
 
=== renamed file 'setup.py' => 'setup.py.moved'