Ticket #850: 850-fix-and-test.dpatch

Sun Dec  6 14:16:09 CET 2009  francois@ctrlaltdel.ch
  * Fix #850, do not follow recursive symlinks

New patches:

[Fix #850, do not follow recursive symlinks
francois@ctrlaltdel.ch**20091206131609
 Ignore-this: aa42ad71aad1369dc58438b4086f403b
] {
hunk ./src/allmydata/scripts/tahoe_backup.py 161
         for child in self.options.filter_listdir(os.listdir(localpath)):
             childpath = os.path.join(localpath, child)
             child = unicode(child)
+
+            # Skip recursive symlinks
+            if os.path.islink(childpath) and os.readlink(childpath) == '.':
+                self.verboseprint("recursive symlink skipped %s" % childpath)
+                break
+
             if os.path.isdir(childpath):
                 metadata = get_local_metadata(childpath)
                 # recurse on the child directory
hunk ./src/allmydata/test/test_cli.py 1291
         _check_filtering(filtered, root_listdir, ('lib.a', '_darcs', 'subdir'),
                          ('nice_doc.lyx',))
 
+    def test_recursive_symlink(self):
+        self.basedir = "cli/Backup/recursive_symlink"
+        self.set_up_grid()
+        backupdir = os.path.join(self.basedir, 'backup')
+        fileutil.make_dirs(backupdir)
+
+        # Create a self-referencing symlink
+        os.symlink('.', os.path.join(backupdir, 'test'))
+
+        def do_backup(verbose=False):
+            cmd = ["backup"]
+            cmd.append(backupdir)
+            cmd.append("tahoe:backups")
+            return self.do_cli(*cmd)
+
+        d = self.do_cli("create-alias", "tahoe")
+        d.addCallback(lambda res: do_backup())
+        return d
+
 class Check(GridTestMixin, CLITestMixin, unittest.TestCase):
 
     def test_check(self):
}

Context:

[remove MutableFileNode.download(), prefer download_best_version() instead
Brian Warner <warner@lothar.com>**20091201225438
 Ignore-this: 5733eb373a902063e09fd52cc858dec0
] 
[Simplify immutable download API: use just filenode.read(consumer, offset, size)
Brian Warner <warner@lothar.com>**20091201225330
 Ignore-this: bdedfb488ac23738bf52ae6d4ab3a3fb
 
 * remove Downloader.download_to_data/download_to_filename/download_to_filehandle
 * remove download.Data/FileName/FileHandle targets
 * remove filenode.download/download_to_data/download_to_filename methods
 * leave Downloader.download (the whole Downloader will go away eventually)
 * add util.consumer.MemoryConsumer/download_to_data, for convenience
   (this is mostly used by unit tests, but it gets used by enough non-test
    code to warrant putting it in allmydata.util)
 * update tests
 * removes about 180 lines of code. Yay negative code days!
 
 Overall plan is to rewrite immutable/download.py and leave filenode.read() as
 the sole read-side API.
] 
[server.py: undo my bogus 'correction' of David-Sarah's comment fix
Brian Warner <warner@lothar.com>**20091201024607
 Ignore-this: ff4bb58f6a9e045b900ac3a89d6f506a
 
 and move it to a better line
] 
[Implement more coherent behavior when copying with dircaps/filecaps (closes #761). Patch by Kevan Carstensen.
"Brian Warner <warner@lothar.com>"**20091130211009] 
[storage.py: update comment
"Brian Warner <warner@lothar.com>"**20091130195913] 
[storage server: detect disk space usage on Windows too (fixes #637)
david-sarah@jacaranda.org**20091121055644
 Ignore-this: 20fb30498174ce997befac7701fab056
] 
[make status of finished operations consistently "Finished"
david-sarah@jacaranda.org**20091121061543
 Ignore-this: 97d483e8536ccfc2934549ceff7055a3
] 
[NEWS: update with all user-visible changes since the last release
Brian Warner <warner@lothar.com>**20091127224217
 Ignore-this: 741da6cd928e939fb6d21a61ea3daf0b
] 
[update "tahoe backup" docs, and webapi.txt's mkdir-with-children
Brian Warner <warner@lothar.com>**20091127055900
 Ignore-this: defac1fb9a2335b0af3ef9dbbcc67b7e
] 
[Add dirnodes to backupdb and "tahoe backup", closes #606.
Brian Warner <warner@lothar.com>**20091126234257
 Ignore-this: fa88796fcad1763c6a2bf81f56103223
 
 * backups now share dirnodes with any previous backup, in any location,
   so renames and moves are handled very efficiently
 * "tahoe backup" no longer bothers reading the previous snapshot
 * if you switch grids, you should delete ~/.tahoe/private/backupdb.sqlite,
   to force new uploads of all files and directories
] 
[webapi: fix t=check for DIR2-LIT (i.e. empty immutable directories)
Brian Warner <warner@lothar.com>**20091126232731
 Ignore-this: 8513c890525c69c1eca0e80d53a231f8
] 
[PipelineError: fix str() on python2.4 . Closes #842.
Brian Warner <warner@lothar.com>**20091124212512
 Ignore-this: e62c92ea9ede2ab7d11fe63f43b9c942
] 
[test_uri.py: s/NewDirnode/Dirnode/ , now that they aren't "new" anymore
Brian Warner <warner@lothar.com>**20091120075553
 Ignore-this: 61c8ef5e45a9d966873a610d8349b830
] 
[interface name cleanups: IFileNode, IImmutableFileNode, IMutableFileNode
Brian Warner <warner@lothar.com>**20091120075255
 Ignore-this: e3d193c229e2463e1d0b0c92306de27f
 
 The proper hierarchy is:
  IFilesystemNode
  +IFileNode
  ++IMutableFileNode
  ++IImmutableFileNode
  +IDirectoryNode
 
 Also expand test_client.py (NodeMaker) to hit all IFilesystemNode types.
] 
[class name cleanups: s/FileNode/ImmutableFileNode/
Brian Warner <warner@lothar.com>**20091120072239
 Ignore-this: 4b3218f2d0e585c62827e14ad8ed8ac1
 
 also fix test/bench_dirnode.py for recent dirnode changes
] 
[Use DIR-IMM and t=mkdir-immutable for "tahoe backup", for #828
Brian Warner <warner@lothar.com>**20091118192813
 Ignore-this: a4720529c9bc6bc8b22a3d3265925491
] 
[web/directory.py: use "DIR-IMM" to describe immutable directories, not DIR-RO
Brian Warner <warner@lothar.com>**20091118191832
 Ignore-this: aceafd6ab4bf1cc0c2a719ef7319ac03
] 
[web/info.py: hush pyflakes
Brian Warner <warner@lothar.com>**20091118191736
 Ignore-this: edc5f128a2b8095fb20686a75747c8
] 
[make get_size/get_current_size consistent for all IFilesystemNode classes
Brian Warner <warner@lothar.com>**20091118191624
 Ignore-this: bd3449cf96e4827abaaf962672c1665a
 
 * stop caching most_recent_size in dirnode, rely upon backing filenode for it
 * start caching most_recent_size in MutableFileNode
 * return None when you don't know, not "?"
 * only render None as "?" in the web "more info" page
 * add get_size/get_current_size to UnknownNode
] 
[ImmutableDirectoryURIVerifier: fix verifycap handling
Brian Warner <warner@lothar.com>**20091118164238
 Ignore-this: 6bba5c717b54352262eabca6e805d590
] 
[Add t=mkdir-immutable to the webapi. Closes #607.
Brian Warner <warner@lothar.com>**20091118070900
 Ignore-this: 311e5fab9a5f28b9e8a28d3d08f3c0d
 
 * change t=mkdir-with-children to not use multipart/form encoding. Instead,
   the request body is all JSON. t=mkdir-immutable uses this format too.
 * make nodemaker.create_immutable_dirnode() get convergence from SecretHolder,
   but let callers override it
 * raise NotDeepImmutableError instead of using assert()
 * add mutable= argument to DirectoryNode.create_subdirectory(), default True
] 
[move convergence secret into SecretHolder, next to lease secret
Brian Warner <warner@lothar.com>**20091118015444
 Ignore-this: 312f85978a339f2d04deb5bcb8f511bc
] 
[nodemaker: implement immutable directories (internal interface), for #607
Brian Warner <warner@lothar.com>**20091112002233
 Ignore-this: d09fccf41813fdf7e0db177ed9e5e130
 
 * nodemaker.create_from_cap() now handles DIR2-CHK and DIR2-LIT
 * client.create_immutable_dirnode() is used to create them
 * no webapi yet
] 
[stop using IURI()/etc as an adapter
Brian Warner <warner@lothar.com>**20091111224542
 Ignore-this: 9611da7ea6a4696de2a3b8c08776e6e0
] 
[clean up uri-vs-cap terminology, emphasize cap instances instead of URI strings
Brian Warner <warner@lothar.com>**20091111222619
 Ignore-this: 93626385f6e7f039ada71f54feefe267
 
  * "cap" means a python instance which encapsulates a filecap/dircap (uri.py)
  * "uri" means a string with a "URI:" prefix
  * FileNode instances are created with (and retain) a cap instance, and
    generate uri strings on demand
  * .get_cap/get_readcap/get_verifycap/get_repaircap return cap instances
  * .get_uri/get_readonly_uri return uri strings
 
 * add filenode.download_to_filename() for control.py, should find a better way
 * use MutableFileNode.init_from_cap, not .init_from_uri
 * directory URI instances: use get_filenode_cap, not get_filenode_uri
 * update/cleanup bench_dirnode.py to match, add Makefile target to run it
] 
[add parser for immutable directory caps: DIR2-CHK, DIR2-LIT, DIR2-CHK-Verifier
Brian Warner <warner@lothar.com>**20091104181351
 Ignore-this: 854398cc7a75bada57fa97c367b67518
] 
[wui: s/TahoeLAFS/Tahoe-LAFS/
zooko@zooko.com**20091029035050
 Ignore-this: 901e64cd862e492ed3132bd298583c26
] 
[tests: bump up the timeout on test_repairer to see if 120 seconds was too short for François's ARM box to do the test even when it was doing it right.
zooko@zooko.com**20091027224800
 Ignore-this: 95e93dc2e018b9948253c2045d506f56
] 
[dirnode.pack_children(): add deep_immutable= argument
Brian Warner <warner@lothar.com>**20091026162809
 Ignore-this: d5a2371e47662c4bc6eff273e8181b00
 
 This will be used by DIR2:CHK to enforce the deep-immutability requirement.
] 
[webapi: use t=mkdir-with-children instead of a children= arg to t=mkdir .
Brian Warner <warner@lothar.com>**20091026011321
 Ignore-this: 769cab30b6ab50db95000b6c5a524916
 
 This is safer: in the earlier API, an old webapi server would silently ignore
 the initial children, and clients trying to set them would have to fetch the
 newly-created directory to discover the incompatibility. In the new API,
 clients using t=mkdir-with-children against an old webapi server will get a
 clear error.
] 
[nodemaker.create_new_mutable_directory: pack_children() in initial_contents=
Brian Warner <warner@lothar.com>**20091020005118
 Ignore-this: bd43c4eefe06fd32b7492bcb0a55d07e
 instead of creating an empty file and then adding the children later.
 
 This should speed up mkdir(initial_children) considerably, removing two
 roundtrips and an entire read-modify-write cycle, probably bringing it down
 to a single roundtrip. A quick test (against the volunteergrid) suggests a
 30% speedup.
 
 test_dirnode: add new tests to enforce the restrictions that interfaces.py
 claims for create_new_mutable_directory(): no UnknownNodes, metadata dicts
] 
[test_dirnode.py: add tests of initial_children= args to client.create_dirnode
Brian Warner <warner@lothar.com>**20091017194159
 Ignore-this: 2e2da28323a4d5d815466387914abc1b
 and nodemaker.create_new_mutable_directory
] 
[update many dirnode interfaces to accept dict-of-nodes instead of dict-of-caps
Brian Warner <warner@lothar.com>**20091017192829
 Ignore-this: b35472285143862a856bf4b361d692f0
 
 interfaces.py: define INodeMaker, document argument values, change
                create_new_mutable_directory() to take dict-of-nodes. Change
                dirnode.set_nodes() and dirnode.create_subdirectory() too.
 nodemaker.py: use INodeMaker, update create_new_mutable_directory()
 client.py: have create_dirnode() delegate initial_children= to nodemaker
 dirnode.py (Adder): take dict-of-nodes instead of list-of-nodes, which
                     updates set_nodes() and create_subdirectory()
 web/common.py (convert_initial_children_json): create dict-of-nodes
 web/directory.py: same
 web/unlinked.py: same
 test_dirnode.py: update tests to match
] 
[dirnode.py: move pack_children() out to a function, for eventual use by others
Brian Warner <warner@lothar.com>**20091017180707
 Ignore-this: 6a823fb61f2c180fd38d6742d3196a7a
] 
[move dirnode.CachingDict to dictutil.AuxValueDict, generalize method names,
Brian Warner <warner@lothar.com>**20091017180005
 Ignore-this: b086933cf429df0fcea16a308d2640dd
 improve tests. Let dirnode _pack_children accept either dict or AuxValueDict.
] 
[test/common.py: update FakeMutableFileNode to new contents= callable scheme
Brian Warner <warner@lothar.com>**20091013052154
 Ignore-this: 62f00a76454a2190d1c8641c5993632f
] 
[The initial_children= argument to nodemaker.create_new_mutable_directory is
Brian Warner <warner@lothar.com>**20091013031922
 Ignore-this: 72e45317c21f9eb9ec3bd79bd4311f48
 now enabled.
] 
[client.create_mutable_file(contents=) now accepts a callable, which is
Brian Warner <warner@lothar.com>**20091013031232
 Ignore-this: 3c89d2f50c1e652b83f20bd3f4f27c4b
 invoked with the new MutableFileNode and is supposed to return the initial
 contents. This can be used by e.g. a new dirnode which needs the filenode's
 writekey to encrypt its initial children.
 
 create_mutable_file() still accepts a bytestring too, or None for an empty
 file.
] 
[webapi: t=mkdir now accepts initial children, using the same JSON that t=json
Brian Warner <warner@lothar.com>**20091013023444
 Ignore-this: 574a46ed46af4251abf8c9580fd31ef7
 emits.
 
 client.create_dirnode(initial_children=) now works.
] 
[replace dirnode.create_empty_directory() with create_subdirectory(), which
Brian Warner <warner@lothar.com>**20091013021520
 Ignore-this: 6b57cb51bcfcc6058d0df569fdc8a9cf
 takes an initial_children= argument
] 
[dirnode.set_children: change return value: fire with self instead of None
Brian Warner <warner@lothar.com>**20091013015026
 Ignore-this: f1d14e67e084e4b2a4e25fa849b0e753
] 
[dirnode.set_nodes: change return value: fire with self instead of None
Brian Warner <warner@lothar.com>**20091013014546
 Ignore-this: b75b3829fb53f7399693f1c1a39aacae
] 
[dirnode.set_children: take a dict, not a list
Brian Warner <warner@lothar.com>**20091013002440
 Ignore-this: 540ce72ce2727ee053afaae1ff124e21
] 
[dirnode.set_uri/set_children: change signature to take writecap+readcap
Brian Warner <warner@lothar.com>**20091012235126
 Ignore-this: 5df617b2d379a51c79148a857e6026b1
 instead of a single cap. The webapi t=set_children call benefits too.
] 
[replace Client.create_empty_dirnode() with create_dirnode(), in anticipation
Brian Warner <warner@lothar.com>**20091012224506
 Ignore-this: cbdaa4266ecb3c6496ffceab4f95709d
 of adding initial_children= argument.
 
 Includes stubbed-out initial_children= support.
] 
[test_web.py: use a less-fake client, making test harness smaller
Brian Warner <warner@lothar.com>**20091012222808
 Ignore-this: 29e95147f8c94282885c65b411d100bb
] 
[webapi.txt: document t=set_children, other small edits
Brian Warner <warner@lothar.com>**20091009200446
 Ignore-this: 4d7e76b04a7b8eaa0a981879f778ea5d
] 
[Verifier: check the full cryptext-hash tree on each share. Removed .todos
Brian Warner <warner@lothar.com>**20091005221849
 Ignore-this: 6fb039c5584812017d91725e687323a5
 from the last few test_repairer tests that were waiting on this.
] 
[Verifier: check the full block-hash-tree on each share
Brian Warner <warner@lothar.com>**20091005214844
 Ignore-this: 3f7ccf6d253f32340f1bf1da27803eee
 
 Removed the .todo from two test_repairer tests that check this. The only
 remaining .todos are on the three crypttext-hash-tree tests.
] 
[Verifier: check the full share-hash chain on each share
Brian Warner <warner@lothar.com>**20091005213443
 Ignore-this: 3d30111904158bec06a4eac22fd39d17
 
 Removed the .todo from two test_repairer tests that check this.
] 
[test_repairer: rename Verifier test cases to be more precise and less verbose
Brian Warner <warner@lothar.com>**20091005201115
 Ignore-this: 64be7094e33338c7c2aea9387e138771
] 
[immutable/checker.py: rearrange code a little bit, make it easier to follow
Brian Warner <warner@lothar.com>**20091005200252
 Ignore-this: 91cc303fab66faf717433a709f785fb5
] 
[test/common.py: wrap docstrings to 80cols so I can read them more easily
Brian Warner <warner@lothar.com>**20091005200143
 Ignore-this: b180a3a0235cbe309c87bd5e873cbbb3
] 
[immutable/download.py: wrap to 80cols, no functional changes
Brian Warner <warner@lothar.com>**20091005192542
 Ignore-this: 6b05fe3dc6d78832323e708b9e6a1fe
] 
[CHK-hashes.svg: cross out plaintext hashes, since we don't include
Brian Warner <warner@lothar.com>**20091005010803
 Ignore-this: bea2e953b65ec7359363aa20de8cb603
 them (until we finish #453)
] 
[docs: a few licensing clarifications requested by Ubuntu
zooko@zooko.com**20090927033226
 Ignore-this: 749fc8c9aeb6dc643669854a3e81baa7
] 
[setup: remove binary WinFUSE modules
zooko@zooko.com**20090924211436
 Ignore-this: 8aefc571d2ae22b9405fc650f2c2062
 I would prefer to have just source code, or indications of what 3rd-party packages are required, under revision control, and have the build process generate o
 r acquire the binaries as needed.  Also, having these in our release tarballs is interfering with getting Tahoe-LAFS uploaded into Ubuntu Karmic.  (Technicall
 y, they would accept binary modules as long as they came with the accompanying source so that they could satisfy their obligations under GPL2+ and TGPPL1+, bu
 t it is easier for now to remove the binaries from the source tree.)
 In this case, the binaries are from the tahoe-w32-client project: http://allmydata.org/trac/tahoe-w32-client , from which you can also get the source.
] 
[setup: remove binary _fusemodule.so 's
zooko@zooko.com**20090924211130
 Ignore-this: 74487bbe27d280762ac5dd5f51e24186
 I would prefer to have just source code, or indications of what 3rd-party packages are required, under revision control, and have the build process generate or acquire the binaries as needed.  Also, having these in our release tarballs is interfering with getting Tahoe-LAFS uploaded into Ubuntu Karmic.  (Technically, they would accept binary modules as long as they came with the accompanying source so that they could satisfy their obligations under GPL2+ and TGPPL1+, but it is easier for now to remove the binaries from the source tree.)
 In this case, these modules come from the MacFUSE project: http://code.google.com/p/macfuse/
] 
[doc: add a copy of LGPL2 for documentation purposes for ubuntu
zooko@zooko.com**20090924054218
 Ignore-this: 6a073b48678a7c84dc4fbcef9292ab5b
] 
[setup: remove a convenience copy of figleaf, to ease inclusion into Ubuntu Karmic Koala
zooko@zooko.com**20090924053215
 Ignore-this: a0b0c990d6e2ee65c53a24391365ac8d
 We need to carefully document the licence of figleaf in order to get Tahoe-LAFS into Ubuntu Karmic Koala.  However, figleaf isn't really a part of Tahoe-LAFS per se -- this is just a "convenience copy" of a development tool.  The quickest way to make Tahoe-LAFS acceptable for Karmic then, is to remove figleaf from the Tahoe-LAFS tarball itself.  People who want to run figleaf on Tahoe-LAFS (as everyone should want) can install figleaf themselves.  I haven't tested this -- there may be incompatibilities between upstream figleaf and the copy that we had here...
] 
[setup: shebang for misc/build-deb.py to fail quickly
zooko@zooko.com**20090819135626
 Ignore-this: 5a1b893234d2d0bb7b7346e84b0a6b4d
 Without this patch, when I ran "chmod +x ./misc/build-deb.py && ./misc/build-deb.py" then it hung indefinitely.  (I wonder what it was doing.)
] 
[docs: Shawn Willden grants permission for his contributions under GPL2+|TGPPL1+
zooko@zooko.com**20090921164651
 Ignore-this: ef1912010d07ff2ffd9678e7abfd0d57
] 
[docs: Csaba Henk granted permission to license fuse.py under the same terms as Tahoe-LAFS itself
zooko@zooko.com**20090921154659
 Ignore-this: c61ba48dcb7206a89a57ca18a0450c53
] 
[setup: mark setup.py as having utf-8 encoding in it
zooko@zooko.com**20090920180343
 Ignore-this: 9d3850733700a44ba7291e9c5e36bb91
] 
[doc: licensing cleanups
zooko@zooko.com**20090920171631
 Ignore-this: 7654f2854bf3c13e6f4d4597633a6630
 Use nice utf-8 © instead of "(c)". Remove licensing statements on utility modules that have been assigned to allmydata.com by their original authors. (Nattraverso was not assigned to allmydata.com -- it was LGPL'ed -- but I checked and src/allmydata/util/iputil.py was completely rewritten and doesn't contain any line of code from nattraverso.)  Add notes to misc/debian/copyright about licensing on files that aren't just allmydata.com-licensed.
] 
[build-deb.py: run darcsver early, otherwise we get the wrong version later on
Brian Warner <warner@lothar.com>**20090918033620
 Ignore-this: 6635c5b85e84f8aed0d8390490c5392a
] 
[new approach for debian packaging, sharing pieces across distributions. Still experimental, still only works for sid.
warner@lothar.com**20090818190527
 Ignore-this: a75eb63db9106b3269badbfcdd7f5ce1
] 
[new experimental deb-packaging rules. Only works for sid so far.
Brian Warner <warner@lothar.com>**20090818014052
 Ignore-this: 3a26ad188668098f8f3cc10a7c0c2f27
] 
[setup.py: read _version.py and pass to setup(version=), so more commands work
Brian Warner <warner@lothar.com>**20090818010057
 Ignore-this: b290eb50216938e19f72db211f82147e
 like "setup.py --version" and "setup.py --fullname"
] 
[test/check_speed.py: fix shbang line
Brian Warner <warner@lothar.com>**20090818005948
 Ignore-this: 7f3a37caf349c4c4de704d0feb561f8d
] 
[setup: remove bundled version of darcsver-1.2.1
zooko@zooko.com**20090816233432
 Ignore-this: 5357f26d2803db2d39159125dddb963a
 That version of darcsver emits a scary error message when the darcs executable or the _darcs subdirectory is not found.
 This error is hidden (unless the --loud option is passed) in darcsver >= 1.3.1.
 Fixes #788.
] 
[de-Service-ify Helper, pass in storage_broker and secret_holder directly.
Brian Warner <warner@lothar.com>**20090815201737
 Ignore-this: 86b8ac0f90f77a1036cd604dd1304d8b
 This makes it more obvious that the Helper currently generates leases with
 the Helper's own secrets, rather than getting values from the client, which
 is arguably a bug that will likely be resolved with the Accounting project.
] 
[immutable.Downloader: pass StorageBroker to constructor, stop being a Service
Brian Warner <warner@lothar.com>**20090815192543
 Ignore-this: af5ab12dbf75377640a670c689838479
 child of the client, access with client.downloader instead of
 client.getServiceNamed("downloader"). The single "Downloader" instance is
 scheduled for demolition anyways, to be replaced by individual
 filenode.download calls.
] 
[tests: double the timeout on test_runner.RunNode.test_introducer since feisty hit a timeout
zooko@zooko.com**20090815160512
 Ignore-this: ca7358bce4bdabe8eea75dedc39c0e67
 I'm not sure if this is an actual timing issue (feisty is running on an overloaded VM if I recall correctly), or it there is a deeper bug.
] 
[stop making History be a Service, it wasn't necessary
Brian Warner <warner@lothar.com>**20090815114415
 Ignore-this: b60449231557f1934a751c7effa93cfe
] 
[Overhaul IFilesystemNode handling, to simplify tests and use POLA internally.
Brian Warner <warner@lothar.com>**20090815112846
 Ignore-this: 1db1b9c149a60a310228aba04c5c8e5f
 
 * stop using IURI as an adapter
 * pass cap strings around instead of URI instances
 * move filenode/dirnode creation duties from Client to new NodeMaker class
 * move other Client duties to KeyGenerator, SecretHolder, History classes
 * stop passing Client reference to dirnode/filenode constructors
   - pass less-powerful references instead, like StorageBroker or Uploader
 * always create DirectoryNodes by wrapping a filenode (mutable for now)
 * remove some specialized mock classes from unit tests
 
 Detailed list of changes (done one at a time, then merged together)
 
 always pass a string to create_node_from_uri(), not an IURI instance
 always pass a string to IFilesystemNode constructors, not an IURI instance
 stop using IURI() as an adapter, switch on cap prefix in create_node_from_uri()
 client.py: move SecretHolder code out to a separate class
 test_web.py: hush pyflakes
 client.py: move NodeMaker functionality out into a separate object
 LiteralFileNode: stop storing a Client reference
 immutable Checker: remove Client reference, it only needs a SecretHolder
 immutable Upload: remove Client reference, leave SecretHolder and StorageBroker
 immutable Repairer: replace Client reference with StorageBroker and SecretHolder
 immutable FileNode: remove Client reference
 mutable.Publish: stop passing Client
 mutable.ServermapUpdater: get StorageBroker in constructor, not by peeking into Client reference
 MutableChecker: reference StorageBroker and History directly, not through Client
 mutable.FileNode: removed unused indirection to checker classes
 mutable.FileNode: remove Client reference
 client.py: move RSA key generation into a separate class, so it can be passed to the nodemaker
 move create_mutable_file() into NodeMaker
 test_dirnode.py: stop using FakeClient mockups, use NoNetworkGrid instead. This simplifies the code, but takes longer to run (17s instead of 6s). This should come down later when other cleanups make it possible to use simpler (non-RSA) fake mutable files for dirnode tests.
 test_mutable.py: clean up basedir names
 client.py: move create_empty_dirnode() into NodeMaker
 dirnode.py: get rid of DirectoryNode.create
 remove DirectoryNode.init_from_uri, refactor NodeMaker for customization, simplify test_web's mock Client to match
 stop passing Client to DirectoryNode, make DirectoryNode.create_with_mutablefile the normal DirectoryNode constructor, start removing client from NodeMaker
 remove Client from NodeMaker
 move helper status into History, pass History to web.Status instead of Client
 test_mutable.py: fix minor typo
] 
[docs: edits for docs/running.html from Sam Mason
zooko@zooko.com**20090809201416
 Ignore-this: 2207e80449943ebd4ed50cea57c43143
] 
[docs: install.html: instruct Debian users to use this document and not to go find the DownloadDebianPackages page, ignore the warning at the top of it, and try it
zooko@zooko.com**20090804123840
 Ignore-this: 49da654f19d377ffc5a1eff0c820e026
 http://allmydata.org/pipermail/tahoe-dev/2009-August/002507.html
] 
[docs: relnotes.txt: reflow to 63 chars wide because google groups and some web forms seem to wrap to that
zooko@zooko.com**20090802135016
 Ignore-this: 53b1493a0491bc30fb2935fad283caeb
] 
[docs: about.html: fix English usage noticed by Amber
zooko@zooko.com**20090802050533
 Ignore-this: 89965c4650f9bd100a615c401181a956
] 
[docs: fix mis-spelled word in about.html
zooko@zooko.com**20090802050320
 Ignore-this: fdfd0397bc7cef9edfde425dddeb67e5
] 
[TAG allmydata-tahoe-1.5.0
zooko@zooko.com**20090802031303
 Ignore-this: 94e5558e7225c39a86aae666ea00f166
] 
Patch bundle hash:
8f27e628082dec120679e4153416f366acdc17ff