Release Notes¶

snakeoil 0.10.10 (2024-12-04)¶

arghparse: fix compatibility with Python 3.12.8 (Michał Górny)

snakeoil 0.10.9 (2024-10-02)¶

arghparse: fix compatibility with Python 3.12.7 (Arthur Zamarin)

snakeoil 0.10.8 (2024-04-08)¶

arghparse: fix compatibility with Python 3.11.9 (Arthur Zamarin)

snakeoil 0.10.7 (2024-01-26)¶

ci: add PyPy3.10, Python 3.12 and Python 3.13 to testing (Sam James, #99)
fix and update tox.ini (Arthur Zamarin)
sphinx_ext: support optional email address in authors (Brian Harring)

snakeoil 0.10.6 (2023-12-22)¶

remove deprecated distutils_extensions (Arthur Zamarin, #77)
enable Python 3.12 support (Sam James, #96)
drop support for Python 3.9 (Arthur Zamarin)

snakeoil 0.10.5 (2023-01-20)¶

cli.arghparse: improve _format_args for Delayed (Arthur Zamarin) https://github.com/pkgcore/pkgcheck/issues/520
compression: prefer gtar over tar if available (Sam James, #93)
format code with black (Brian Harring, Arthur Zamarin, #95)

snakeoil 0.10.4 (2022-12-09)¶

Add constraint satisfaction problem solver (#91, Arthur Zamarin)
dist.sphinxext: mark distutils_extensions as deprecated. This module will be removed in the near releases (Arthur Zamarin)
generate_man_rsts: improve sub-sectioning for sub-commands (Arthur Zamarin)
generate_man_rsts: better formatting for command line options (Arthur Zamarin)

snakeoil 0.10.3 (2022-11-15)¶

dist.sphinxext: new internal sphinx extension, used by pkgcore stack. This is considered internal and unstable API. (#89, Arthur Zamarin)

snakeoil 0.10.2 (2022-11-08)¶

compression: add parallel xz support (#83, Sam James, Arthur Zamarin)
various improvements for the build system (Arthur Zamarin)
drop support for python 3.8 (Arthur Zamarin)

snakeoil 0.10.1 (2022-09-30)¶

test/mixins: remove mk_named_tempfile. Use tmp_path / [filename] instead (Arthur Zamarin)
fileutils: remove deprecated write_file. Use Path().write_text instead (Arthur Zamarin)
fileutils: remove deprecated UnbufferedWriteHandle. Use io.TextIOWrapper with write_through=True instead (Arthur Zamarin)
descriptors: remove unused classproperty (Arthur Zamarin)

snakeoil 0.10.0 (2022-09-18)¶

This release has various breaking changes, with various deprecated stuff removed. We are planing to remove more cruft in the future, so please be aware. All removals will be listed in the release notes, and a better replacement will be provided.

This is also the first release to use flit for packaging, which simplifies the build a lot. We include a makefile for convenience of running various build commands. Please speak to us if they do not suit your needs.

dist.distutils_extensions is now deprecated, and will be removed in the future.
klass: add typing for jit_attr* funcitons (Arthur Zamarin)
stringio: remove text_writable and bytes_writable. Use io.StringIO and io.BytesIO instead (Arthur Zamarin)
remove TempDirMixin and tempdir_decorator. Use tempdir instead (Arthur Zamarin)
remove cython files, as regular Python code was fast enough and the performance difference was negligible (Arthur Zamarin)
remove mk_cpy_loadable_testcase. Use parameterized arguments in pytest instead (Arthur Zamarin)
remove TestCase. Use pytest’s assert instead (Arthur Zamarin)
version: better locale protection around running git (Arthur Zamarin)
migrate to flit packaging and universal wheels (Arthur Zamarin)

snakeoil 0.9.12 (2022-08-08)¶

distutils_extensions: fix pip detection for editable installs (Arthur Zamarin)
ci: Update cibuildwheel - should fix generation of wheels for CPython 3.10 and PyPy 3.9 (Arthur Zamarin)
fix and port snakeoil to Python 3.11 (Arthur Zamarin, Sam James, #73)

snakeoil 0.9.11 (2022-07-29)¶

Remove TempDir and RandomPath test fixtures. In case you used those those fixtures, migrate to tmp_path and tmp_path / random_str(10) (Arthur Zamarin, #66)
osutil: sizeof_fmt() improvements and tests addition (Michał Górny, #67)
Fix distutils extension compatibility with setuptools. (Sam James, Arthur Zamarin)
Force newer required version of cython, so a Python 3.11 compatible .c is generated (Arthur Zamarin)

snakeoil 0.9.10 (2021-12-25)¶

Fix distutils extension compatibility with setuptools 60.

snakeoil 0.9.9 (2021-12-14)¶

Fix missing requirement files in sdist.

snakeoil 0.9.8 (2021-12-14)¶

Fix setup.py develop support.
snakeoil.chksum: Add Whirlpool support.
Add support for running on PyPy 3.8.

snakeoil 0.9.7 (2021-08-04)¶

snakeoil.dist.distutils_extensions: Migrate to using distutils bundled with setuptools since distutils is now deprecated in py3.10 and will be removed in py3.12.
snakeoil.compression: Simplify registering archive subclasses.
snakeoil.sequences: Drop namedtuple support – use the various alternatives available from the standard library instead.

snakeoil 0.9.6 (2021-03-26)¶

snakeoil.dist.distutils_extensions: Add support for forcing binary wheel creation.
snakeoil.osutils: Drop old FsLock related support.
snakeoil.contexts: Add optional pathspecs param for GitStash.
snakeoil.dist.distutils_extensions: Drop old OptionalExtension support.
snakeoil.process.spawn: Drop find_invoking_python() since it’s not used by pkgcore anymore.

snakeoil 0.9.5 (2021-03-19)¶

snakeoil.dist.distutils_extensions: Drop unittest test command support.
snakeoil.dist.generate_man_rsts: Drop unused script running support.
snakeoil.cli.arghparse: Drop overly fragile CopyableParser support.
snakeoil.weakrefs: Drop old WeakValCache support since the related CPython extension doesn’t exist anymore.

snakeoil 0.9.4 (2021-03-12)¶

snakeoil.contents: Add GitStash context manager.
snakeoil.mappings.OrderedFrozenSet: Support slice notation.
snakeoil.dist.distutils_extensions: Run pytest as a separate process to control module search path.
snakeoil.dist.distutils_extensions: Unconditionally add doc building commands.

snakeoil 0.9.3 (2021-03-05)¶

snakeoil.cli.arghparse: Add support for nargs param and accept ‘0’ and ‘1’ values for the StoreBool action.
snakeoil.cli.arghparse: Run early parse funcs registered in parent parsers.
snakeoil.contexts: Add os_environ context manager for os.environ mangling.
snakeoil.dist.distutils_extensions: Set commands for setuptools by default.
snakeoil.dist.distutils_extensions: Fully install packages for pytest runs.
snakeoil.version: Don’t display missing extended version message for releases.
snakeoil.cli.arghparse: Add support for auto-registering existing subcommands.

snakeoil 0.9.2 (2021-02-18)¶

snakeoil.dist.iterables: Fix caching_iter sorting when bool is used (#57).
snakeoil.cli.arghparse: Initial subparser support for lazily-imported subcommand modules using lazy-object-proxy. This allows scripts to split subcommands into separate modules that are only imported as required.
snakeoil.dist.distutils_extensions: Force pip to require supported python versions.

snakeoil 0.9.1 (2021-01-31)¶

snakeoil.formatters: Use simple ANSI term when forcing colors.

snakeoil 0.9.0 (2021-01-27)¶

snakeoil.cli.arghparse: Check for colliding CommaSeparatedElements.
snakeoil.mappings: Add OrderedFrozenSet implementation which is a immutable OrderedSet.
Drop support for python 3.6 and 3.7.

snakeoil 0.8.9 (2020-12-04)¶

snakeoil.cli.arghparse: Make ArgumentParser copyable by default.
snakeoil.mappings: Add OrderedSet implementation leveraging guaranteed insertion order for dicts py37 onwards.
snakeoil.cli.arghparse: Add create_dir argument type that’s similar to the existent_dir type except it creates the dir if it’s missing.
snakeoil.cli.arghparse: Add ParseNonblockingStdin argparse action that accepts arguments from stdin in a non-blocking fashion.
snakeoil.cli.tool: Explicitly handle UserExceptions when parsing args.
Remove old py2 C extensions.
snakeoil.dist.distutils_extensions: Force development version usage when installing from git with pip.
Add py39 support.

snakeoil 0.8.8 (2020-02-09)¶

snakeoil.cli.arghparse: Add support for registering early parse functions and rework known arg parsing to allow config file option defaults.

snakeoil 0.8.7 (2020-01-26)¶

snakeoil.dist.distutils_extensions: Revert dev deps change to fix wheel builds.

snakeoil 0.8.6 (2020-01-25)¶

snakeoil.dist.distutils_extensions: Support pulling dev deps for non-release installs when generating install dep list.
snakeoil.cli.arghparse: Add a separate pre-parse phase that resets registered defaults and runs pre-parse functions. Helps fix man page generation for scripts registering pre-parse functions.

snakeoil 0.8.5 (2019-12-20)¶

snakeoil.fileutils: Default to utf8 for readfile() and readlines().
snakeoil.cli.arghparse: Raise error for colliding disabled and enabled values for arguments using the CommaSeparatedNegations action.

snakeoil 0.8.4 (2019-11-30)¶

snakeoil.cli.arghparse: Drop default subparser support.
snakeoil.cli.arghparse: Run multiple registered final check functions, previously only the last registered function would be run.
snakeoil.cli.arghparse: Add positive_int and bounded_int argparse types.
snakeoil.cli.arghparse: Add bind_pre_parse() to support running a decorated function for pre-parsing parser manipulation purposes.
Add py3.8 support.

snakeoil 0.8.3 (2019-09-13)¶

contexts: Support modifying attributes from object instances with patch().
Fix pickling various objects for pkgcore/pkgcheck parallelization work.
strings: Add doc_dedent() for properly dedenting docstrings.

snakeoil 0.8.2 (2019-08-30)¶

contexts: SplitExec: Set childpid attr before running _parent_setup().
snakeoil.dist.distutils_extensions: Force sphinx to run at our chosen verbosity when running sdist.

snakeoil 0.8.1 (2019-08-23)¶

snakeoil.dist.distutils_extensions: Fix sdist builds for pkgcore.

snakeoil 0.8.0 (2019-08-22)¶

snakeoil.demandimport: Add new module for lazy loading to replace snakeoil.demandload.
GPL2/BSD dual licensing was dropped to BSD as agreed by all contributors.
snakeoil.klass: Add support for pull attribute list from __slots__ for DirProxy.
snakeoil.klass: Add SlotsPicklingMixin class to aid pickling class with __slots__ defined.
Minimum supported python version is now 3.6 (dropped python2 support).
snakeoil.compression: Add generic archive/compressed file unpack support to aid in pkgcore’s unpack() move from bash to python.
snakeoil.cli.arghparse: Add CopyableParser class that allows for shallow copies of argparsers to be made that don’t allow argument propagation to their ancestors.
snakeoil.iterables: Add partition() function that splits an iterable into two iterables based on a given filter.
snakeoil.log: Add suppress_logging context manager that allows suppressing logging messages at a given level.
snakeoil.cli.arghparse: Add custom help action to show man pages for –help and still regular terminal output for -h.
snakeoil.cli.arghparse: Add SubcmdAbbrevArgumentParser class that supports abbreviating subcommands.
Merge pkgdist back into snakeoil.dist.distutils_extensions as pip now supports basic PEP 518 functionality so projects can depend on snakeoil to be pulled in before running setup.py.
snakeoil.cli.arghparse: Add append variants of csv arg parsing actions.
snakeoil.decorators: Add new module for various decorator utilities currently supporting splitexec, namespace, and coroutine decorators.
snakeoil.contexts: Fix SplitExec when running under system tracers like coverage.

snakeoil 0.7.5 (2017-11-26)¶

snakeoil.cli.tool: Tool: Force line buffering if redirecting or piping stdout.
snakeoil.chksum: Add support for SHA3 and BLAKE2 hash functions – BLAKE2 is now required by pkgcore to generate new manifests in the gentoo repo.

snakeoil 0.7.4 (2017-10-04)¶

snakeoil.cli.arghparse: ArgumentParser: Allow add_subparsers() to be called multiple times, returning a cached action object for subsequent calls.
snakeoil.cli.arghparse: ArgumentParser: Change subparsers property into an immutable dictionary with keys and values as subparser names and objects, respectively.
snakeoil.contexts: SplitExec: Add support for passing back the exit status of the child process as the ‘exit_status’ attribute on the context manager.
snakeoil.process.spawn: Add bash_version method to get the system bash shell version in the form of MAJOR.MINOR.PATCH.

snakeoil 0.7.3 (2017-09-27)¶

snakeoil.contexts: SplitExec(): Run clean up method by default on SIGINT or SIGTERM.
snakeoil.contexts: Add syspath() context manager that mangles sys.path as requested and reverts on exit.
Fix documentation generation for modules with custom package dirs.

snakeoil 0.7.2 (2017-09-21)¶

snakeoil.cli.arghparse: Add support to specify a default subparser for parser instances. This allows for things such as adding conflicting options to both the root command and subcommands without causing issues in addition to helping support default subparsers.
Add initial support to replace C extensions with cython modules.
snakeoil.contexts: Add patch context manager for modifying module attributes.
snakeoil.cli.tool: New module for running scripts – abstraction of pkgcore’s method for running its commandline tools.
snakeoil.process.spawn: Imported from pkgcore.spawn.
snakeoil.process: Add fallback parameter to find_binary().
snakeoil.strings: New module for string-related methods.
snakeoil.dist.generate_docs: Support custom doc generation by projects.
snakeoil.osutils: Add force_symlink() method.

snakeoil 0.7.1 (2016-10-30)¶

Drop py3.3 support.
snakeoil.process.namespaces: Ignore recursive remounting errors for the root directory. When layering namespaces only the first mount() call in this case will work, subsequent calls will raise invalid argument errors.

snakeoil 0.7.0 (2016-05-28)¶

snakeoil.xml: Prefer lxml.etree when available.
snakeoil.bash: Conditional line continuation support for iter_read_bash().
snakeoil.dist.distutils_extensions: Move to external pkgdist project and bundle the standalone module to circumvent pre-setup parsing dep cycles.
snakeoil.lists: Deprecated module name was renamed to snakeoil.sequences. Stub will exist with warnings until 0.8.
snakeoil.osutils: Add supported_systems() decorator to support restricting functions to set of supported systems.
snakeoil.process: Remove get_proc_count() and get_physical_proc_count().
snakeoil.cli.arghparse: Add generic argparse related support from pkgcore.

snakeoil 0.6.6 (2015-12-13)¶

snakeoil.cli: Add userquery() from pkgcore.ebuild.formatter.
snakeoil.formatters: Don’t force colored output if the terminal doesn’t support it.
Add support for adding extended docs to argparse arguments via the ‘docs’ kwarg. This allows for adding extended content meant for man pages directly to the arguments in scripts. To enable support, all that must be done is importing snakeoil.cli which will monkeypatch add_argument() from argparse to ignore ‘docs’ kwargs by default. The extended content can be pulled at certain times such as during doc generation by setting a flag, see snakeoil.dist.generate_man_rsts for example usage.
snakeoil.dist.distutils_extensions: Drop get_number_of_processors() since multiprocessing.cpu_count is used instead.
snakeoil.klass: Add patch decorator method for simplified monkeypatching.
snakeoil.contextlib has been moved to snakeoil.contexts to avoid any potential namespace issues from contextlib in the stdlib.

snakeoil 0.6.5 (2015-08-10)¶

snakeoil.process: Add is_running() that determines whether a process is running or not using the PID status from the proc filesystem.
snakeoil.process: Deprecate get_physical_proc_count() and get_proc_count(), use cpu_count() from multiprocessing instead or other similar support. Support will be removed in 0.7.
Add a build_py3 target to snakeoil.dist.distutils_extensions to allow for writing py3 compatible code and using 3to2 for conversion purposes instead of writing py2 compatible code and using 2to3 during project builds.
Drop some extra complexity from snakeoil.osutils.ensure_dirs(), mostly this entails not altering perms on existing dirs anymore while traversing up the components of a given path.
Add initial user namespace support functionality. Currently the process running the code gets its uid/gid mapped to root in the new namespace, but that will be made more configurable later on.
Add support for setting the system hostname and domain name under a UTS namespace.
Make sure child mount namespaces don’t affect their parents. Some distros use shared rootfs mount namespaces by default so child mount namespace mount events propagate back up to their parents if they aren’t made private or slaved.
Move mount methods from snakeoil.osutils into their own module at snakeoil.osutils.mount.
snakeoil.fileutils: add a touch(1) equivalent.
Add the beginnings of a context manager module as snakeoil.contextlib. Currently this just includes the SplitExec class leveraged by pychroot.
Move snakeoil.namespaces to snakeoil.process.namespaces since they directly relate to processes and we’ll probably add a similar module for cgroups in the near future.
snakeoil.version: format_version() was merged into get_version().

snakeoil 0.6.4 (2015-06-28)¶

Add header install directory to the search path when building extensions. This helps fix building consumers like pkgcore in virtualenvs.
Simplify snakeoil.xml by dropping deprecated elementtree related module fallbacks.
Drop internal OrderedDict implementation from snakeoil.mappings, use the version from collections instead.
Fix snakeoil.compatibility ConfigParser defaults so 3rd party usage doesn’t get overridden.
Add ctypes-based umount/umount2 wrapper in snakeoil.osutils.

snakeoil 0.6.3 (2015-04-01)¶

Remove temporary plugincache generated during tests so it isn’t installed.

snakeoil 0.6.2 (2015-04-01)¶

Add locking for demandload replace operations during the scope modification phase, fixing threaded access.
Fix fd leak during highly-threaded pmaint regen runs due to a cyclic reference issue in readlines_iter from snakeoil.fileutils.
Fix py3k argument encoding for mount() from snakeoil.osutils.
Add tox-based testsuite support.
Drop distutils sdist filelist workaround and respect MANIFEST.in instead.

snakeoil 0.6.1 (2015-03-24)¶

Add ProxiedAttrs mappings class used as a proxy mapping protocol to an object’s attributes.
Update namespace support and move it into snakeoil.namespaces.
Add ctypes-based mount(2) wrapper in snakeoil.osutils.
Deprecate snakeoil.modules.load_module, importlib.import_module should be used instead.
Downgrade scope from a required argument to a optional keyword argument for demandload, the caller’s global scope is used by default when no argument is passed.

snakeoil 0.6 (2014-12-01)¶

Make sure shared memory has the right rwx permissions for multiprocessing semaphores.
Fix race condition for demand compiled regexps which solves various threading issues including running a parallelized pmaint regen in pkgcore.
Remove old compat snakeoil.fileutils imports from snakeoil.osutils and make_SlottedDict_kls from snakeoil.obj.
Drop python2.4 any/all built-ins compat, python2.6 is_disjoint compat, and pre-python2.6 next built-in compat.
Remove pre-python2.7 compat support including iterables.chain_from_iterables (use chain.from_iterable from itertools), is_disjoint (use isdisjoint), and built-in backports for all, any, and next.
Drop deprecated currying.alias_class_method; use klass.alias_method.
Migrate pkgcore.vdb.ondisk.bz2_data_source to snakeoil.data_source.bz2_source.
Drop deprecated getters from snakeoil.data_source; attrs and functions should be accessed directly.
Move snakeoil.fileutils.read_dict to snakeoil.bash.read_dict and drop compatibility shims for the iter_read_bash and read_bash_dict methods from fileutils.
Add support to klass.steal_docs to clone docstrings from regular functions in addition to class functions.

snakeoil 0.5.3 (2013-09-26)¶

Simplify sphinx-build handling, removing checks for Gentoo specific suffixes.
Switch from pbzip2 to lbzip2 for parallel bzip2 support since lbzip2 can handle parallel decompression of regular non-lbzip2 compressed files unlike pbzip2.
Fix python3.3 support.

snakeoil 0.5.2 (2012-10-17)¶

Fixed doc generation for py3k, including threading appropriate python path/version down through the generation.

snakeoil 0.5.1 (2012-09-29)¶

Fix corner case exception in formatter extension, cleanup potential NULL derefs.
If hashlib has a whirlpool implementation, we use it and prefer it over mhash or our fallback implementation; it’s faster, drops the GIL, and generally is the bees-knees.
compatibility.raise_from no longer looses traceback information in >py3k.

snakeoil 0.5 (2012-08-04)¶

lintplugins were updated to pylint 0.25.1 API; likely works with >=0.21.
Added awareness of PEP3149 naming schemes to the namespace walkers.
Fixed utime related race in 2to3 cacher; comes about due to python not stamping the inode w/ the exact float given, represents via a particular source file being converted a second time (typically breaking it); only triggerable in local development, however it’s annoying, thus sorted.
Effective immediately, python2.4 is no longer supported. Last release was in ‘08, so really, really don’t care anymore.
snakeoil.chksum grew whirlpool support, including native python fallback.
snakeoil.chksum grew sha512 support.
snakeoil.sphinx_utils was added w/ two reusable/importable scripts;
- generate_api_rsts.py: scans a given python namespace, generating properly structured ReST docs. This is intended for better api doc generation than what sphinx’s autodoc tools currently provide.
- generate_news_rst.py: given a mostly ReST like NEWS/changelog file, this can convert into into pages like http://docs.snakeoil.googlecode.com/git/news.html . Given appropriate args, it can bind in release urls, git shortlog urls, and generally make it fairly pretty while useful.
snakeoil.version is now reusable for other projects, and the _verinfo format it uses has been converted to storing a dictionary (better deserialization namely via having it as a dict).
snakeoil.distutils_extensions:
- sphinx_build_doc now always returns a class for usage, rather than None if sphinx wasn’t available. Clients should use this, and structure their deps appropriately to not execute doc building unless desired (in which case it’s better to have the command throw an error, instead of having distutils state “no such command” for a build_doc target for example).
- build and install now support generating _verinfo files automatically from git, and installing them if the support is enabled.
- All bzr related code has been ripped out in full.
Docstring work, and general doc’s overhaul (including site updates).
snakeoil.process now exposes functionality for finding the number of actual HW cores, filtering out HT cpus. This is relevant since certain operations (pbzip2 in particular) aren’t any faster using HT- they just consume more cpu.
Api’s have been shifting a bit; compatibility was left in place, but large chunks of snakeoil.osutils and snakeoil.fileutils have moved to the appropriate place.
Compression framework was added; snakeoil.compression. Has built in awareness of pbzip2, parallelization, and will use the most efficient form it can to get things done (primarily threaded, but implemented in a fashion where the GIL doesn’t matter thus can easily hit multi core).
closerange compatibility method was added for <2.6; this method of closing is far faster than normal “scan all fds”, thus exposing it.

snakeoil 0.4.6 (2011-12-14)¶

for bash parsing, pass into shlex the file being read so that relative source calls can find the file correctly. Issue #1.
add currying.wrap_exception and currying.wrap_exception_complex

snakeoil 0.4.5 (2011-11-30)¶

Fix defaultdict in py2.4 to be compatible with >=py2.5 defaultdict.
Fix WeakRefFinalizer so that instances that are still strongly referenced at the time of sys.exit have their finalizers ran via atexit; specifically, run the finalizers only for that pid.

snakeoil 0.4.4 (2011-10-26)¶

use sane permissions for directories created for tests.
swallow ENOTDIR from readfiles and readlines if told to ignore missing files.

snakeoil 0.4.3 (2011-09-27)¶

snakeoil.demandload is now threading aware, and no longer will complain if threading leads to an accidental already-replaced placeholder access.
snakeoil.osutils.read* moved to snakeoil.fileutils; compatibility shim will be removed in 0.5.
fileutils.write_file was added for quick one off writes.
chksums generation now will parallelize where worthwhile. Since this is python, GIL bouncing does occur, ultimately costing more total CPU for the larger/more chksums. That said, it’s overall faster going in parallel (for 4 chksummers, it’s about 75% faster; for 2, about 40% faster).

Again, note this is enabled by default. To disable, parallelize=False.
added snakeoil.process for getting processor count
don’t install compatibility_py3k.py if we’re targetting py2k; no need, and it pisses off pyc generation.

snakeoil 0.4.2 (2011-09-02)¶

compatibility.raise_from; compatibility across py2k/py3k for doing py3k raise EXCEPTION from CAUSE; see pep3134. Primarily for raising an exception which was caused by another (casting an exception essentially).
added klass.cached_property, and fixed klass.jit_attr to block bad usage that goes recursive.
add distutils_extension for building sphinx docs
if the invoking python has issue 7604 fixed, then use a fast single lookup version of delitem for slotted instances; else use the normal double lookup workaround.

snakeoil 0.4.1 (2011-06-22)¶

issue 7567; python2.7.1 reintroduces it (2.7 lacked it). Gentoo bug 350215.
snakeoil.unittest_extensions was split out from distutils_extensions.
snakeoil.obj.make_SlottedDict_kls moved to mappings; it’ll be removed from snakeoil.obj in 0.5.
currying.alias_class_method is now deprecated; use klass.alias_method instead.
handle differing lib2to3 dependant on multiprocessing existance.

snakeoil 0.4 (2011-04-24)¶

added snakeoil.klass.immutable_instance metaclass and an equivalent inject function for modifying the scope. These are used to avoid classes adhoc’ing the same sort of functionality, rarely throwing appropriate/standardized exceptions.
for any consumers of snakeoil’s common header, for py2.4/py2.5 we’ve added suppression of the segfault potential for Py_CLEAR(tmp); see http://mail.python.org/pipermail/python-bugs-list/2008-July/055285.html for the sordid details.
mappings.inject_getitem_as_getattr, and AttrAccessible were added. The former is for modifying a class so that attribute access is proxied to item access (including rewriting KeyError to AttributeError); the latter is a general usable class for this.
mappings.ListBackedDict and mappings.TupleBackedDict have been removed.
demandload.demand_compile_regexp no longer returns the placeholder- instead it injects the placeholder directly into the scope, just like demandload does.
added snakeoil.iterables.chain_from_iterable; this is compatibility for py2.4/py2.5, in >=py2.6 it just uses itertools.chain.from.iterable .
initial work towards jython2.5 support.
Massive amount of docstring work. Yes, snakeoil is now documented and has examples.
correct an off by one in caching_iter.
snakeoil.dependant_methods.ForcedDepends grew two new methods; __set_stage_state__ for tweaking stage state manually, and __stage_step_callback__ for being notified on each stage completed.
snakeoil.stringio; basically a py2k/py3k compatible set of class wrapping cStringIO/StringIO as necessary to provide readonly or writable versions of text vs bytes StringIO handles. Note that readonly instances throw TypeError on write/truncate/etc, instead of cStringIO’s behaviour or just not having the methods (or silently modifying things).
pkgcore ticket 172; posix access technically allows for a root invoker to get a True result when doing X_OK on a non-executable file; this renders the function a fair bit useless for doing $PATH lookups for example, so we bundle a native python implementation that is fallen back to for userlands (opensolaris for example) that choose to implement that broken posix option. Linux/*BSDs don’t have this issue, so os.access is used for those userlands.
pkgcore ticket 13; data_source.get* functions return handles that have .exceptions holding the exceptions they can throw, and that are caused by underlying implementation issues (versus caused by bad usage of the object).
snakeoil data_source’s will loose their get_ methods in the next major version- they’re kept strictly for compatibility.
fix_copy.inject_copy will be removed after the next major version. What remains does nothing.
pkgcore.chksum was moved to snakeoil.chksum; pkgcore.interfaces.data_source was moved to snakeoil.data_source in addition.
all bash functionality was split out of .fileutils into .bash
osutils.readlines arg strip_newlines became strip_whitespace; if set, it’ll wipe all leading/trailing whitespace from a line.
snakeoil.weakrefs grew a new experimental metaclass; WeakRefFinalizer. Basically this class allows __del__ without the GC issues __del__ normally suffers. Experimental, but should work- just keep in mind you get proxies back from users of that class.
snakeoil.test.test_del_usage was added to scan for classes using __del__ when they could use WeakRefFinalizer instead.
snakeoil.lists.predicate_split; given a predicate function, a stream, and an optional key function (think DSU pattern for sorted), split the stream into two sequences- one sequence where the predicate evalutes true, the other sequence where it evaluates false.
detect python bug 3770 (gentoo bug 330511), and disable multiprocessing for 2to3 conversion if it’s found.

snakeoil 0.3.7 (2010-06-26)¶

detect python bug 4660, and disable parallelization in 2to3 conversion if the system suffers from it. This fixes an occasional “task_not_done” ValueError.
minor optimization to TerminfoFormatters to cache and reuse TerminfoColor. Exempting the formatter, Terminfo* objects are now immutable
snakeoil.mappings.defaultdict; compatibility implementation, defaults to collections.defaultdict for >=python-2.5, a native python implementation for 2.4

snakeoil 0.3.6.5 (2010-05-21)¶

add discard method to AtomicWriteFile to intentionally discard the updated content.
fix initialization of RefCountingSet to set the refcount correctly on duplicate keys

snakeoil 0.3.6.4 (2010-04-21)¶

fix rare segfault potential with cpython generic_equality __eq__/__ne__ when it’s blindly transferred across classes.
fix py3k handling of terminfo entries- xterm for example was affected.

snakeoil 0.3.6.3 (2010-03-14)¶

‘dumb’ terminfo is no longer tempted- to useless to hack around it.
get_formatters now properly falls back to plain text formatting if no terminfo could be found.

snakeoil 0.3.6.2 (2010-02-15)¶

overhauls to 2to3k support; speedup caching by near 16% via moving it into the process rather then as an external invocation. Additionally fork the workers off to # of cpus on the system for parallelization when the results aren’t cached.
force -fno-strict-aliasing to be appended when it’s invalidly left out by distutils internals. See issue 969718 in pythons tracker. If you’re using a non gcc compiler, you’ll need to pass –disable-distutils-flag-fixing to disable the -fno-strict-aliasing additions.

snakeoil 0.3.6.1 (2010-02-07)¶

Licensing changes- see COPYING for specifics. Majority of snakeoil is now GPL2/BSD 3 clause w/ a few exemptions.
minor cleanup to extensions for GC support and stricter gcc.

snakeoil 0.3.6 (2010-01-08)¶

add a cpy extension for jit_attr functionality; this brings the overhead down to effectively background noise for most usages.
add a reflective_hash class to snakeoil.klass; this is primarily used for when the has is precomputed and stored somewhere.
add an extension for ProtectedSet.__contains__; this levels a nice speedup for pcheck scans.
enable a set of extensions for slots backed mappings; primarily affects pkgcore cache data objects, end result being pquery against a full repo in raw mode is about 8% faster overall.

snakeoil 0.3.5 (2009-12-27)¶

snakeoil.struct_compat module was added; provides py2.4 compat, and adds read/write methods that take an fd and operate as unpack/pack against that fd. This simplifies invocation/stream access primarily.
add test_slot_shadowing; basically looks for __slots__ usage where a derivative class adds slotting the parent already provides, thus leading to a very unfun set of bugs and wasted memory.
fix test_demandload_usage to properly recurse…

snakeoil 0.3.4 (2009-12-13)¶

add compatibility.is_py3k_like for marking if it’s >=py2.7, or py3k

snakeoil 0.3.3 (2009-10-26)¶

use the registration framework for epydoc to make it aware of partials.
monkeypatch pydoc.isdata on the fly to be aware of partials. This makes pydoc output far more useful (and matches what is expected).
experimental py3.1 support via 2to3. setup.py automatically will convert the source if invoked by a py3k interpretter.
snakeoil.osutils.readlines was expanded out into multiple functions, utf8, ascii, utf8_strict, ascii_strict, and bytes. ‘Strict’ means that we always want it decoded. Non strict is useful when the file has some utf8 in it you don’t care about, and don’t want to take the codecs.open performance hit under py2k. Under py3k, it’s always decoded (required due to py3k changes).
snakeoil.osutils.readfile was expanded out into multiple functions, utf8, ascii, ascii_strict, and bytes. Use the appropriate one- this will make py3k compliance far easier.
optimization in snakeoil.osutils.readlines; for small files, it’s roughly a 4-8% speedup, for larger files (over half a meg) growing past 25%. This puts its performance at roughly 2x over the open equivalent for small files, and near 10-15% faster for larger files.
snakeoil.klass grew new properties to ease common tasks; jit_attr (invoke the target func to get the value, cache the value, return that value till the cached value is wiped). alias_attr (when that attr is accessed, hand the attribute the alias targets).
snakeoil.compatibility additions; next, cmp, file_cls, and is_py3k, next, intern, sort_cmp (to paper over sorted no longer accepting a cmp arg), and sort_cmp (to paper over list.sort no longer accepting a cmp arg).
snakeoil.klass.cached_hash; decorator to automatically cache the results of the target function. primarily intended for __hash__ implementations.
snakeoil.klass.inject_richcmp_methods_from_cmp ; passed a class scope, it’ll automatically add __le__, __lt__, __gt__, __eq__, etc, via invoking __cmp__ if the python version is py3k.
snakeoil/caching_2to3.py, a caching form of 2to3 that relies on an env var ‘PY2TO3_CACHEDIR’ to determine where to store cached versions of converted source. Algorithm behind the cache is md5 based- if the md5 of the targeted source exists in the cachedir, it reuses the results from the previous run instead of invoking 2to3. Massive performance speed up from this- uncached, setup.py test is ~32s. cached, ~1.9s. That said, this is experimental- bug reports welcome however.
setup.py test has been heavily enhanced- now it does its testing against a standalone install of the source, should have zero side affects on the underlying source.
paper over a bug in cElementTree where it fails to import fully, but doesn’t raise ImportError. This address upstream python bug 3475.
snakeoil no longer installs a bundled copy of elementtree if the python version is 2.5 or higher (no need, python bundles its own).
snakeoil.test.test_demandload_usage now supports blacklisting- this is primarily useful for blocking py3k specific modules from being checked under py2k, and vice versa.
in test_demandload_usage helper functionality it’s possible for a file to disappear under its feet- ignore it, lock files from trial can trigger this. Note it via logging.warn, and continue.

snakeoil 0.3.2 (2009-03-24)¶

handle a race condition in ensure_dirs where the directory is created underfoot (thus a non issue).
massive memory reduction for snakeoil.tar monkey patching; via punting the unused .buf storage (512 byes per TarInfo). Grand total, this is a 70% reduction of the memory used compared to vanilla TarInfo (50% less then snakeoil 0.3).
tweak snakeoil.tar monkey patching to re-enable memory savings on python2.6
correct python2.6 compatibility issues; __(sizeof|format|subclasshook)__ awareness, and handle getattr throwing AttributeError in the infinite recursion getattr tests.
for test_demandload_usage, output the exception that caused the demandload ‘touch’ to fail.

snakeoil 0.3.1 (2008-11-07)¶

pkgcore ticket 215; fixup corner case errors in normpath cpy.

snakeoil 0.3 (2008-08-28)¶

refactor dependant_methods to stop creating strong cycles that the python vm seems unable to break. Shift the func storage away from .raw_func to .sd_raw_func in addition. Add in __(un|)wrap_stage_dependencies__ so that invocation of unwrap then wrap will make changes to stage_depends take affect.
intern gname and uname for TarInfo objects via property trickery- again, purpose being less memory usage.
AtomicFile now marks itself as initially finalized until it has a fd; this removes spurios complaints from __del__
LimitedChangeSet got an additional kwarg; key_validator. A function can be passed in via this to do validation of the desired key- either it throws an exception, or returns the key to use.

snakeoil 0.2 (2008-03-18)¶

snakeoil.fileutils.iter_read_bash and friends grew an allow_inline_comment param to control stripping of inlined comments; defaults to True.
bash parsing bug where “x=y” w/out a trailing newline wasn’t returning the ‘y’ value.
x=-* (specifically unquoted) is a valid assignment, fixed.
added SNAKEOIL_DEMANDLOAD_PROTECTION environment variable- if set to something other then ‘yes’, disables the placeholder checks. Main intention for this functionality is for when code is introspecting demandload consuming code (epydoc for example), and inadvertantly triggers the access multiple times.

snakeoil 0.1 (2007-11-11)¶

Add a cpython version of snakeoil.formatters.

snakeoil 0.1-rc2 (2007-07-06)¶

Pulled in any/all cpy extensions if not available in current python version.
Added several pylint checks for naughty things like bool(len(seq)), itering over dict.keys() and shadowing builtins.
Misc doc improvements.
Rewrite demandload with a new multiple arg style, and update the appropriate pylint checker.
Fix title updating by flushing the formatter’s stream.
overhaul demandload test case for consuming code.
Add snakeoil.containers.SetMixin to provide set methods for various objects.
Remove snakeoil.const - unused.
Improve test coverage in general.
Add folding dicts.
Move snakeoil.file to snakeoil.fileutils.
Initial release, split out from pkgcore.util.*.