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Changelog

1.9

================

• No major changes from 1.9b1.

• Updated documentation links for docs.pylonsproject.org to use HTTPS.

1.9b1

==================

• Add an informative error message when unknown predicates are supplied. The
  new message suggests alternatives based on the list of known predicates.
  See Fix #1603, add closest predicate name in error message Pylons/pyramid#3054

• Added integrity attributes for JavaScripts in cookiecutters, scaffolds, and
  resulting source files in tutorials.
  See use integrity attribute for javascripts from CDN Pylons/pyramid#2548

• Update RELEASING.txt for updating cookiecutters. Change cookiecutter URLs to
  use shortcut.
  See add pyramid_retry to cookiecutters Pylons/pyramid#3042

• Ensure the correct threadlocals are pushed during view execution when
  invoked from request.invoke_exception_view.
  See When invoking an exception view, push the new threadlocals Pylons/pyramid#3060

• Fix a bug in which pyramid.security.ALL_PERMISSIONS failed to return
  a valid iterator in its __iter__ implementation.
  See Ensure that instances of 'AllPermissionsList' are iterable. Pylons/pyramid#3074

• Normalize the permission results to a proper class hierarchy.
  pyramid.security.ACLAllowed is now a subclass of
  pyramid.security.Allowed and pyramid.security.ACLDenied is now a
  subclass of pyramid.security.Denied.
  See fix p.security.ACLPermitsResult to subclass p.security.PermitsResult Pylons/pyramid#3084

• Add a quote_via argument to pyramid.encode.urlencode to follow
  the stdlib's version and enable custom quoting functions.
  See quote_via urlencode argument Pylons/pyramid#3088

• Support _query=None and _anchor=None in request.route_url as well
  as query=None and anchor=None in request.resource_url.
  Previously this would cause an ? and a ``, respectively, in the url
  with nothing after it. Now the unnecessary parts are dropped from the
  generated URL. See refactor parse_url_overrides Pylons/pyramid#3034

• Revamp the IRouter API used by IExecutionPolicy to force
  pushing/popping the request threadlocals. The
  IRouter.make_request(environ) API has been replaced by
  IRouter.request_context(environ) which should be used as a context
  manager. See add a router.request_context context manager Pylons/pyramid#3086

1.9a2

==================

Backward Incompatibilities

• request.exception and request.exc_info will only be set if the
  response was generated by the EXCVIEW tween. This is to avoid any confusion
  where a response was generated elsewhere in the pipeline and not in
  direct relation to the original exception. If anyone upstream wants to
  catch and render responses for exceptions they should set
  request.exception and request.exc_info themselves to indicate
  the exception that was squashed when generating the response.

Similar behavior occurs with request.invoke_exception_view in which
the exception properties are set to reflect the exception if a response
is successfully generated by the method.

This is a very minor incompatibility. Most tweens right now would give
priority to the raised exception and ignore request.exception. This
change just improves and clarifies that bookkeeping by trying to be
more clear about the relationship between the response and its squashed
exception. See Pylons/pyramid#3029 and
Pylons/pyramid#3031

1.9a1

==================

Major Features

• The file format used by all p* command line scripts such as pserve
  and pshell, as well as the pyramid.paster.bootstrap function
  is now replaceable thanks to a new dependency on
  plaster <https://docs.pylonsproject.org/projects/plaster/en/latest/>_.

For now, Pyramid is still shipping with integrated support for the
PasteDeploy INI format by depending on the
plaster_pastedeploy <https://github.com/Pylons/plaster_pastedeploy>_
binding library. This may change in the future.

See Pylons/pyramid#2985

• Added an execution policy hook to the request pipeline. An execution
  policy has the ability to control creation and execution of the request
  objects before they enter the rest of the pipeline. This means for a single
  request environ the policy may create more than one request object.

The first library to use this feature is
pyramid_retry <https://docs.pylonsproject.org/projects/pyramid-retry/en/latest/>_.

See Pylons/pyramid#2964

• CSRF support has been refactored out of sessions and into its own
  independent API in the pyramid.csrf module. It supports a pluggable
  pyramid.interfaces.ICSRFStoragePolicy which can be used to define your
  own mechanism for generating and validating CSRF tokens. By default,
  Pyramid continues to use the pyramid.csrf.LegacySessionCSRFStoragePolicy
  that uses the request.session.get_csrf_token and
  request.session.new_csrf_token APIs under the hood to preserve
  compatibility. Two new policies are shipped as well,
  pyramid.csrf.SessionCSRFStoragePolicy and
  pyramid.csrf.CookieCSRFStoragePolicy which will store the CSRF tokens
  in the session and in a standalone cookie, respectively. The storage policy
  can be changed by using the new
  pyramid.config.Configurator.set_csrf_storage_policy config directive.

CSRF tokens should be used via the new pyramid.csrf.get_csrf_token,
pyramid.csrf.new_csrf_token and pyramid.csrf.check_csrf_token APIs
in order to continue working if the storage policy is changed. Also, the
pyramid.csrf.get_csrf_token function is injected into templates to be
used conveniently in UI code.

See Pylons/pyramid#2854 and
Pylons/pyramid#3019

Minor Features

• Support an open_url config setting in the pserve section of the
  config file. This url is used to open a web browser when pserve --browser
  is invoked. When this setting is unavailable the pserve script will
  attempt to guess the port the server is using from the
  server:<server_name> section of the config file but there is no
  requirement that the server is being run in this format so it may fail.
  See pserve open_url config setting Pylons/pyramid#2984

• The pyramid.config.Configurator can now be used as a context manager
  which will automatically push/pop threadlocals (similar to
  config.begin() and config.end()). It will also automatically perform
  a config.commit() and thus it is only recommended to be used at the
  top-level of your app. See turn the Configurator into a context manager Pylons/pyramid#2874

• The threadlocals are now available inside any function invoked via
  config.include. This means the only config-time code that cannot rely
  on threadlocals is code executed from non-actions inside the main. This
  can be alleviated by invoking config.begin() and config.end()
  appropriately or using the new context manager feature of the configurator.
  See push threadlocals while executing config.include functions Pylons/pyramid#2989

Bug Fixes

• HTTPException's accepts a detail kwarg that may be used to pass additional
  details to the exception. You may now pass objects so long as they have a
  valid str method. See Bugfix: p.h.HTTPException.__str __  Pylons/pyramid#2951

• Fix a reference cycle causing memory leaks in which the registry
  would keep a Configurator instance alive even after the configurator
  was discarded. Another fix was also added for the global_registries
  object in which the registry was stored in a closure preventing it from
  being deallocated. See Fixed several reference cycles to prevent memory leaks. Pylons/pyramid#2967

• Fix a bug directly invoking pyramid.scripts.pserve.main with the
  --reload option in which sys.argv is always used in the subprocess
  instead of the supplied argv.
  See Pserve --reload does not keep worker arguments. Fixes #2961 Pylons/pyramid#2962

Deprecations

• Pyramid currently depends on plaster_pastedeploy to simplify the
  transition to plaster by maintaining integrated support for INI files.
  This dependency on plaster_pastedeploy should be considered subject to
  Pyramid's deprecation policy and may be removed in the future.
  Applications should depend on the appropriate plaster binding to satisfy
  their needs.

• Retrieving CSRF token from the session has been deprecated in favor of
  equivalent methods in the pyramid.csrf module. The CSRF methods
  (ISession.get_csrf_token and ISession.new_csrf_token) are no longer
  required on the ISession interface except when using the default
  pyramid.csrf.LegacySessionCSRFStoragePolicy.

Also, pyramid.session.check_csrf_token is now located at
pyramid.csrf.check_csrf_token.

See Pylons/pyramid#2854 and
Pylons/pyramid#3019

Documentation Changes

• Added the execution policy to the routing diagram in the Request Processing
  chapter. See add execution policy to pyramid request processing diagrams Pylons/pyramid#2993

1.8

================

• No major changes from 1.8b1.

1.8b1

==================

Features

• Added an override option to config.add_translation_dirs to allow
  later calls to place translation directories at a higher priority than
  earlier calls. See add override option to add_translation_dirs Pylons/pyramid#2902

Documentation Changes

• Improve registry documentation to discuss uses as a component registry
  and as a dictionary. See improve the registry documentation to cover usage as a dictionary Pylons/pyramid#2893

• Quick Tour, Quick Tutorial, and most other remaining documentation updated to
  use cookiecutters instead of pcreate and scaffolds.
  See docs cookiecutter changes only - Quick Tour Pylons/pyramid#2888 and
  Docs cookiecutter changes only - Quick Tutorial and all other files Pylons/pyramid#2889

• Fix unittests in wiki2 to work without different dependencies between
  py2 and py3. See update docs per https://github.com/Pylons/pyramid/commit/fb7a98bbdace… Pylons/pyramid#2899

• Update Windows documentation to track newer Python 3 improvements to the
  installer. See Windows documentation updates Pylons/pyramid#2900

• Updated the mod_wsgi tutorial to use cookiecutters and Apache 2.4+.
  See update mod_wsgi tutorial to use a cookiecutter Pylons/pyramid#2901

1.8a1

==================

Backward Incompatibilities

• Support for the IContextURL interface that was deprecated in Pyramid 1.3
  has been removed. See remove the deprecated IContextURL Pylons/pyramid#2822

• Following the Pyramid deprecation period (1.6 -> 1.8),
  daemon support for pserve has been removed. This includes removing the
  daemon commands (start, stop, restart, status) as well as the following
  arguments: --daemon, --pid-file, --log-file,
  --monitor-restart, --status, --user, --group,
  --stop-daemon

To run your server as a daemon you should use a process manager instead of
pserve.

See Pylons/pyramid#2615

• pcreate is now interactive by default. You will be prompted if a file
  already exists with different content. Previously if there were similar
  files it would silently skip them unless you specified --interactive
  or --overwrite.
  See make --interactive the default for pcreate Pylons/pyramid#2775

• Removed undocumented argument cachebust_match from
  pyramid.static.static_view. This argument was shipped accidentally
  in Pyramid 1.6. See Remove cachebust_match Pylons/pyramid#2681

• Change static view to avoid setting the Content-Encoding response header
  to an encoding guessed using Python's mimetypes module. This was causing
  clients to decode the content of gzipped files when downloading them. The
  client would end up with a foo.txt.gz file on disk that was already
  decoded, thus should really be foo.txt. Also, the Content-Encoding
  should only have been used if the client itself broadcast support for the
  encoding via Accept-Encoding request headers.
  See Avoid setting Content-Encoding header for static view responses. Pylons/pyramid#2810

• Settings are no longer accessible as attributes on the settings object
  (e.g. request.registry.settings.foo). This was deprecated in Pyramid 1.2.
  See make settings only accessible using dictionary lookup Pylons/pyramid#2823

Features

• Python 3.6 compatibility.
  add 3.6 support to documentation Pylons/pyramid#2835

• pcreate learned about --package-name to allow you to create a new
  project in an existing folder with a different package name than the project
  name. See Add --package-name option to pcreate.  Pylons/pyramid#2783

• The _get_credentials private method of BasicAuthAuthenticationPolicy
  has been extracted into standalone function extract_http_basic_credentials
  in pyramid.authentication module, this function extracts HTTP Basic
  credentials from a request object, and returns them as a named tuple.
  See ref #2659 public HTTP Basic credentials extraction Pylons/pyramid#2662

• Pyramid 1.4 silently dropped a feature of the configurator that has been
  restored. It's again possible for action discriminators to conflict across
  different action orders.
  See handle deferred discriminators when using re-entrant actions Pylons/pyramid#2757

• pyramid.paster.bootstrap and its sibling pyramid.scripting.prepare
  can now be used as context managers to automatically invoke the closer
  and pop threadlocals off of the stack to prevent memory leaks.
  See allow prepare/bootstrap to be used as a context manager Pylons/pyramid#2760

• Added pyramid.config.Configurator.add_exception_view and the
  pyramid.view.exception_view_config decorator. It is now possible using
  these methods or via the new exception_only=True option to add_view
  to add a view which will only be matched when handling an exception.
  Previously any exception views were also registered for a traversal
  context that inherited from the exception class which prevented any
  exception-only optimizations.
  See Exception-only option when registering views Pylons/pyramid#2660

• Added the exception_only boolean to
  pyramid.interfaces.IViewDeriverInfo which can be used by view derivers
  to determine if they are wrapping a view which only handles exceptions.
  This means that it is no longer necessary to perform request-time checks
  for request.exception to determine if the view is handling an exception
• the pipeline can be optimized at config-time.
  See Exception-only option when registering views Pylons/pyramid#2660

• pserve should now work with gevent and other workers that need
  to monkeypatch the process, assuming the server and / or the app do so
  as soon as possible before importing the rest of pyramid.
  See fix pserve to work with gevent workers Pylons/pyramid#2797

• Pyramid no longer copies the settings object passed to the
  pyramid.config.Configurator(settings=). The original dict is kept.
  See make settings only accessible using dictionary lookup Pylons/pyramid#2823

• The csrf trusted origins setting may now be a whitespace-separated list of
  domains. Previously only a python list was allowed. Also, it can now be set
  using the PYRAMID_CSRF_TRUSTED_ORIGINS environment variable similar to
  other settings. See make settings only accessible using dictionary lookup Pylons/pyramid#2823

• pserve --reload now uses the
  hupper <http://docs.pylonsproject.org/projects/hupper/en/latest/>
  library to monitor file changes. This comes with many improvements:

• If the watchdog <http://pythonhosted.org/watchdog/>_ package is
  installed then monitoring will be done using inotify instead of
  cpu and disk-intensive polling.

• The monitor is now a separate process that will not crash and starts up
  before any of your code.

• The monitor will not restart the process after a crash until a file is
  saved.

• The monitor works on windows.

• You can now trigger a reload manually from a pyramid view or any other
  code via hupper.get_reloader().trigger_reload(). Kind of neat.

• You can trigger a reload by issuing a SIGHUP to the monitor process.

See Pylons/pyramid#2805

• A new [pserve] section is supported in your config files with a
  watch_files key that can configure pserve --reload to monitor custom
  file paths. See support a [pserve] config section with a list of files to watch Pylons/pyramid#2827

• Allow streaming responses to be made from subclasses of
  pyramid.httpexceptions.HTTPException. Previously the response would
  be unrolled while testing for a body, making it impossible to stream
  a response.
  See Bugfix: streaming exceptions Pylons/pyramid#2863

• Update starter, alchemy and zodb scaffolds to support IPv6 by using the
  new listen directives in waitress.
  See Issue #2656 Pylons/pyramid#2853

• All p* scripts now use argparse instead of optparse. This improves their
  --help output as well as enabling nicer documentation of their options.
  See Scripts optparse to argparse Pylons/pyramid#2864

• Any deferred configuration action registered via config.action may now
  depend on threadlocal state, such as asset overrides, being active when
  the action is executed.
  See defer config.add_translation_dirs and push/pop threadlocals during deferred actions/discriminators Pylons/pyramid#2873

• Asset specifications for directories passed to
  config.add_translation_dirs now support overriding the entire asset
  specification, including the folder name. Previously only the package name
  was supported and the folder would always need to have the same name.
  See defer config.add_translation_dirs and push/pop threadlocals during deferred actions/discriminators Pylons/pyramid#2873

• config.begin() will propagate the current threadlocal request through
  as long as the registry is the same. For example:

.. code-block:: python

request = Request.blank(...)
config.begin(request)   pushes a request
config.begin()          propagates the previous request through unchanged
assert get_current_request() is request

See Pylons/pyramid#2873

• Added a new callback option to config.set_default_csrf_options which
  can be used to determine per-request whether CSRF checking should be enabled
  to allow for a mix authentication methods. Only cookie-based methods
  generally require CSRF checking.
  See add a callback hook to set_default_csrf_options for disabling checks … Pylons/pyramid#2778

Bug Fixes

• Fixed bug in proutes such that it now shows the correct view when a
  class and attr is involved.
  See: This shows the correct view when a class and attr is involved. Pylons/pyramid#2687

• Fix a FutureWarning in Python 3.5 when using re.split on the
  format setting to the proutes script.
  See re.split() requires non-empty match Pylons/pyramid#2714

• Fix a RuntimeWarning emitted by WebOb when using arbitrary objects
  as the userid in the AuthTktAuthenticationPolicy. This is now caught
  by the policy and the object is serialized as a base64 string to avoid
  the cryptic warning. Since the userid will be read back as a string on
  subsequent requests a more useful warning is emitted encouraging you to
  use a primitive type instead.
  See Fix AuthTktCookieHelper so that it doesn't create bad cookies Pylons/pyramid#2715

• Pyramid 1.6 introduced the ability for an action to invoke another action.
  There was a bug in the way that config.add_view would interact with
  custom view derivers introduced in Pyramid 1.7 because the view's
  discriminator cannot be computed until view derivers and view predicates
  have been created in earlier orders. Invoking an action from another action
  would trigger an unrolling of the pipeline and would compute discriminators
  before they were ready. The new behavior respects the order of the action
  and ensures the discriminators are not computed until dependent actions
  from previous orders have executed.
  See handle deferred discriminators when using re-entrant actions Pylons/pyramid#2757

• Fix bug in i18n where the default domain would always use the Germanic plural
  style, even if a different plural function is defined in the relevant
  messages file. See Fix pluralization in default domain for non-germanic languages Pylons/pyramid#2859

• The config.override_asset method now occurs during
  pyramid.config.PHASE1_CONFIG such that it is ordered to execute before
  any calls to config.add_translation_dirs.
  See defer config.add_translation_dirs and push/pop threadlocals during deferred actions/discriminators Pylons/pyramid#2873

Deprecations

• The pcreate script and related scaffolds have been deprecated in favor
  of the popular
  cookiecutter <https://cookiecutter.readthedocs.io/en/latest/>_ project.

All of Pyramid's official scaffolds as well as the tutorials have been
ported to cookiecutters:

• pyramid-cookiecutter-starter <https://github.com/Pylons/pyramid-cookiecutter-starter>_

• pyramid-cookiecutter-alchemy <https://github.com/Pylons/pyramid-cookiecutter-alchemy>_

• pyramid-cookiecutter-zodb <https://github.com/Pylons/pyramid-cookiecutter-zodb>_

See Pylons/pyramid#2780

Documentation Changes

• Update Typographical Conventions.
  Overhaul Style Guide Pylons/pyramid#2838

• Add pyramid_nacl_session <http://docs.pylonsproject.org/projects/pyramid-nacl-session/en/latest/>_
  to session factories. See link to pyramid_nacl_session as a secure cookie-based session alternative Pylons/pyramid#2791

• Update HACKING.txt from stale branch that was never merged to master.
  See update HACKING.txt Pylons/pyramid#2782

• Updated Windows installation instructions and related bits.
  See Installing Pyramid on a Windows System needs correction Pylons/pyramid#2661

• Fix an inconsistency in the documentation between view predicates and
  route predicates and highlight the differences in their APIs.
  See document more clearly the __call__ method on route and view predi… Pylons/pyramid#2764

• Clarify a possible misuse of the headers kwarg to subclasses of
  pyramid.httpexceptions.HTTPException in which more appropriate
  kwargs from the parent class pyramid.response.Response should be
  used instead. See Clarify that headers are ADDED to the response Pylons/pyramid#2750

• The SQLAlchemy + URL Dispatch + Jinja2 (wiki2) and
  ZODB + Traversal + Chameleon (wiki) tutorials have been updated to
  utilize the new cookiecutters and drop support for the pcreate
  scaffolds.

See Pylons/pyramid#2881 and
Pylons/pyramid#2883.

• Improve output of p* script descriptions for help.
  See improve display of help's description for p* scripts Pylons/pyramid#2886

• Quick Tour updated to use cookiecutters instead of pcreate and scaffolds.
  See docs cookiecutter changes only - Quick Tour Pylons/pyramid#2888

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖