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Click Changelog

Version 8.0

Unreleased

Version 7.1

Unreleased

Version 7.0

Released 2018-09-25

  • Drop support for Python 2.6 and 3.3. (#967, #976)
  • Wrap click.Choice's missing message. (#202, #1000)
  • Add native ZSH autocompletion support. (#323, #865)
  • Document that ANSI color info isn't parsed from bytearrays in Python 2. (#334)
  • Document byte-stripping behavior of CliRunner. (#334, #1010)
  • Usage errors now hint at the --help option. (#393, #557)
  • Implement streaming pager. (#409, #889)
  • Extract bar formatting to its own method. (#414)
  • Add DateTime type for converting input in given date time formats. (#423)
  • secho's first argument can now be None, like in echo. (#424)
  • Fixes a ZeroDivisionError in ProgressBar.make_step, when the arg passed to the first call of ProgressBar.update is 0. (#447, #1012)
  • Show progressbar only if total execution time is visible. (#487)
  • Added the ability to hide commands and options from help. (#500)
  • Document that options can be required=True. (#514, #1022)
  • Non-standalone calls to Context.exit return the exit code, rather than calling sys.exit. (#533, #667, #1098)
  • click.getchar() returns Unicode in Python 3 on Windows, consistent with other platforms. (#537, #821, #822, #1088, #1108)
  • Added FloatRange type. (#538, #553)
  • Added support for bash completion of type=click.Choice for Options and Arguments. (#535, #681)
  • Only allow one positional arg for Argument parameter declaration. (#568, #574, #1014)
  • Add case_sensitive=False as an option to Choice. (#569)
  • click.getchar() correctly raises KeyboardInterrupt on "^C" and EOFError on "^D" on Linux. (#583, #1115)
  • Fix encoding issue with click.getchar(echo=True) on Linux. (#1115)
  • param_hint in errors now derived from param itself. (#598, #704, #709)
  • Add a test that ensures that when an argument is formatted into a usage error, its metavar is used, not its name. (#612)
  • Allow setting prog_name as extra in CliRunner.invoke. (#616, #999)
  • Help text taken from docstrings truncates at the \f form feed character, useful for hiding Sphinx-style parameter documentation. (#629, #1091)
  • launch now works properly under Cygwin. (#650)
  • Update progress after iteration. (#651, #706)
  • CliRunner.invoke now may receive args as a string representing a Unix shell command. (#664)
  • Make Argument.make_metavar() default to type metavar. (#675)
  • Add documentation for ignore_unknown_options. (#684)
  • Add bright colors support for click.style and fix the reset option for parameters fg and bg. (#703, #809)
  • Add show_envvar for showing environment variables in help. (#710)
  • Avoid BrokenPipeError during interpreter shutdown when stdout or stderr is a closed pipe. (#712, #1106)
  • Document customizing option names. (#725, #1016)
  • Disable sys._getframes() on Python interpreters that don't support it. (#728)
  • Fix bug in test runner when calling sys.exit with None. (#739)
  • Clarify documentation on command line options. (#741, #1003)
  • Fix crash on Windows console. (#744)
  • Fix bug that caused bash completion to give improper completions on chained commands. (#754, #774)
  • Added support for dynamic bash completion from a user-supplied callback. (#755)
  • Added support for bash completions containing spaces. (#773)
  • Allow autocompletion function to determine whether or not to return completions that start with the incomplete argument. (#790, #806)
  • Fix option naming routine to match documentation and be deterministic. (#793, #794)
  • Fix path validation bug. (#795, #1020)
  • Add test and documentation for Option naming: functionality. (#799)
  • Update doc to match arg name for path_type. (#801)
  • Raw strings added so correct escaping occurs. (#807)
  • Fix 16k character limit of click.echo on Windows. (#816, #819)
  • Overcome 64k character limit when writing to binary stream on Windows 7. (#825, #830)
  • Add bool conversion for "t" and "f". (#842)
  • NoSuchOption errors take ctx so that --help hint gets printed in error output. (#860)
  • Fixed the behavior of Click error messages with regards to Unicode on 2.x and 3.x. Message is now always Unicode and the str and Unicode special methods work as you expect on that platform. (#862)
  • Progress bar now uses stderr by default. (#863)
  • Add support for auto-completion documentation. (#866, #869)
  • Allow CliRunner to separate stdout and stderr. (#868)
  • Fix variable precedence. (#873, #874)
  • Fix invalid escape sequences. (#877)
  • Fix ResourceWarning that occurs during some tests. (#878)
  • When detecting a misconfigured locale, don't fail if the locale command fails. (#880)
  • Add case_sensitive=False as an option to Choice types. (#887)
  • Force stdout/stderr writable. This works around issues with badly patched standard streams like those from Jupyter. (#918)
  • Fix completion of subcommand options after last argument (#919, #930)
  • _AtomicFile now uses the realpath of the original filename so that changing the working directory does not affect it. (#920)
  • Fix incorrect completions when defaults are present (#925, #930)
  • Add copy option attrs so that custom classes can be re-used. (#926, #994)
  • "x" and "a" file modes now use stdout when file is "-". (#929)
  • Fix missing comma in __all__ list. (#935)
  • Clarify how parameters are named. (#949, #1009)
  • Stdout is now automatically set to non blocking. (#954)
  • Do not set options twice. (#962)
  • Move fcntl import. (#965)
  • Fix Google App Engine ImportError. (#995)
  • Better handling of help text for dynamic default option values. (#996)
  • Fix get_winter_size() so it correctly returns (0,0). (#997)
  • Add test case checking for custom param type. (#1001)
  • Allow short width to address cmd formatting. (#1002)
  • Add details about Python version support. (#1004)
  • Added deprecation flag to commands. (#1005)
  • Fixed issues where fd was undefined. (#1007)
  • Fix formatting for short help. (#1008)
  • Document how auto_envvar_prefix works with command groups. (#1011)
  • Don't add newlines by default for progress bars. (#1013)
  • Use Python sorting order for ZSH completions. (#1047, #1059)
  • Document that parameter names are converted to lowercase by default. (#1055)
  • Subcommands that are named by the function now automatically have the underscore replaced with a dash. If you register a function named my_command it becomes my-command in the command line interface.
  • Hide hidden commands and options from completion. (#1058, #1061)
  • Fix absolute import blocking Click from being vendored into a project on Windows. (#1068, #1069)
  • Fix issue where a lowercase auto_envvar_prefix would not be converted to uppercase. (#1105)

Version 6.7

(bugfix release; released on January 6th 2017)

  • Make click.progressbar work with codecs.open files. See #637.
  • Fix bug in bash completion with nested subcommands. See #639.
  • Fix test runner not saving caller env correctly. See #644.
  • Fix handling of SIGPIPE. See #626
  • Deal with broken Windows environments such as Google App Engine's. See #711.

Version 6.6

(bugfix release; released on April 4th 2016)

  • Fix bug in click.Path where it would crash when passed a -. See #551.

Version 6.4

(bugfix release; released on March 24th 2016)

  • Fix bug in bash completion where click would discard one or more trailing arguments. See #471.

Version 6.3

(bugfix release; released on February 22 2016)

  • Fix argument checks for interpreter invoke with -m and -c on Windows.
  • Fixed a bug that cased locale detection to error out on Python 3.

Version 6.2

(bugfix release, released on November 27th 2015)

  • Correct fix for hidden progress bars.

Version 6.1

(bugfix release, released on November 27th 2015)

  • Resolved an issue with invisible progress bars no longer rendering.
  • Disable chain commands with subcommands as they were inherently broken.
  • Fix MissingParameter not working without parameters passed.

Version 6.0

(codename "pow pow", released on November 24th 2015)

  • Optimized the progressbar rendering to not render when it did not actually change.
  • Explicitly disallow nargs=-1 with a set default.
  • The context is now closed before it's popped from the stack.
  • Added support for short aliases for the false flag on toggles.
  • Click will now attempt to aid you with debugging locale errors better by listing with the help of the OS what locales are available.
  • Click used to return byte strings on Python 2 in some unit-testing situations. This has been fixed to correctly return unicode strings now.
  • For Windows users on Python 2, Click will now handle Unicode more correctly handle Unicode coming in from the system. This also has the disappointing side effect that filenames will now be always unicode by default in the Path type which means that this can introduce small bugs for code not aware of this.
  • Added a type parameter to Path to force a specific string type on the value.
  • For users running Python on Windows the echo and prompt functions now work with full unicode functionality in the Python windows console by emulating an output stream. This also applies to getting the virtual output and input streams via click.get_text_stream(...).
  • Unittests now always force a certain virtual terminal width.
  • Added support for allowing dashes to indicate standard streams to the Path type.
  • Multi commands in chain mode no longer propagate arguments left over from parsing to the callbacks. It's also now disallowed through an exception when optional arguments are attached to multi commands if chain mode is enabled.
  • Relaxed restriction that disallowed chained commands to have other chained commands as child commands.
  • Arguments with positive nargs can now have defaults implemented. Previously this configuration would often result in slightly unexpected values be returned.

Version 5.1

(bugfix release, released on 17th August 2015)

  • Fix a bug in pass_obj that would accidentally pass the context too.

Version 5.0

(codename "tok tok", released on 16th August 2015)

  • Removed various deprecated functionality.
  • Atomic files now only accept the w mode.
  • Change the usage part of help output for very long commands to wrap their arguments onto the next line, indented by 4 spaces.
  • Fix a bug where return code and error messages were incorrect when using CliRunner.
  • added get_current_context.
  • added a meta dictionary to the context which is shared across the linked list of contexts to allow click utilities to place state there.
  • introduced Context.scope.
  • The echo function is now threadsafe: It calls the write method of the underlying object only once.
  • prompt(hide_input=True) now prints a newline on ^C.
  • Click will now warn if users are using unicode_literals.
  • Click will now ignore the PAGER environment variable if it is empty or contains only whitespace.
  • The click-contrib GitHub organization was created.

Version 4.1

(bugfix release, released on July 14th 2015)

  • Fix a bug where error messages would include a trailing None string.
  • Fix a bug where Click would crash on docstrings with trailing newlines.
  • Support streams with encoding set to None on Python 3 by barfing with a better error.
  • Handle ^C in less-pager properly.
  • Handle return value of None from sys.getfilesystemencoding
  • Fix crash when writing to unicode files with click.echo.
  • Fix type inference with multiple options.

Version 4.0

(codename "zoom zoom", released on March 31st 2015)

  • Added color parameters to lots of interfaces that directly or indirectly call into echoing. This previously was always autodetection (with the exception of the echo_via_pager function). Now you can forcefully enable or disable it, overriding the auto detection of Click.
  • Added an UNPROCESSED type which does not perform any type changes which simplifies text handling on 2.x / 3.x in some special advanced usecases.
  • Added NoSuchOption and BadOptionUsage exceptions for more generic handling of errors.
  • Added support for handling of unprocessed options which can be useful in situations where arguments are forwarded to underlying tools.
  • Added max_content_width parameter to the context which can be used to change the maximum width of help output. By default Click will not format content for more than 80 characters width.
  • Added support for writing prompts to stderr.
  • Fix a bug when showing the default for multiple arguments.
  • Added support for custom subclasses to option and argument.
  • Fix bug in clear() on Windows when colorama is installed.
  • Reject nargs=-1 for options properly. Options cannot be variadic.
  • Fixed an issue with bash completion not working properly for commands with non ASCII characters or dashes.
  • Added a way to manually update the progressbar.
  • Changed the formatting of missing arguments. Previously the internal argument name was shown in error messages, now the metavar is shown if passed. In case an automated metavar is selected, it's stripped of extra formatting first.

Version 3.3

(bugfix release, released on September 8th 2014)

  • Fixed an issue with error reporting on Python 3 for invalid forwarding of commands.

Version 3.2

(bugfix release, released on August 22nd 2014)

  • Added missing err parameter forwarding to the secho function.
  • Fixed default parameters not being handled properly by the context invoke method. This is a backwards incompatible change if the function was used improperly. See :ref:`upgrade-to-3.2` for more information.
  • Removed the invoked_subcommands attribute largely. It is not possible to provide it to work error free due to how the parsing works so this API has been deprecated. See :ref:`upgrade-to-3.2` for more information.
  • Restored the functionality of invoked_subcommand which was broken as a regression in 3.1.

Version 3.1

(bugfix release, released on August 13th 2014)

  • Fixed a regression that caused contexts of subcommands to be created before the parent command was invoked which was a regression from earlier Click versions.

Version 3.0

(codename "clonk clonk", released on August 12th 2014)

  • formatter now no longer attempts to accomodate for terminals smaller than 50 characters. If that happens it just assumes a minimal width.
  • added a way to not swallow exceptions in the test system.
  • added better support for colors with pagers and ways to override the autodetection.
  • the CLI runner's result object now has a traceback attached.
  • improved automatic short help detection to work better with dots that do not terminate sentences.
  • when definining options without actual valid option strings now, Click will give an error message instead of silently passing. This should catch situations where users wanted to created arguments instead of options.
  • Restructured Click internally to support vendoring.
  • Added support for multi command chaining.
  • Added support for defaults on options with multiple and options and arguments with nargs != 1.
  • label passed to progressbar is no longer rendered with whitespace stripped.
  • added a way to disable the standalone mode of the main method on a Click command to be able to handle errors better.
  • added support for returning values from command callbacks.
  • added simplifications for printing to stderr from echo.
  • added result callbacks for groups.
  • entering a context multiple times defers the cleanup until the last exit occurs.
  • added open_file.

Version 2.6

(bugfix release, released on August 11th 2014)

  • Fixed an issue where the wrapped streams on Python 3 would be reporting incorrect values for seekable.

Version 2.5

(bugfix release, released on July 28th 2014)

  • Fixed a bug with text wrapping on Python 3.

Version 2.4

(bugfix release, released on July 4th 2014)

  • Corrected a bug in the change of the help option in 2.3.

Version 2.3

(bugfix release, released on July 3rd 2014)

  • Fixed an incorrectly formatted help record for count options.
  • Add support for ansi code stripping on Windows if colorama is not available.
  • restored the Click 1.0 handling of the help parameter for certain edge cases.

Version 2.2

(bugfix release, released on June 26th 2014)

  • fixed tty detection on PyPy.
  • fixed an issue that progress bars were not rendered when the context manager was entered.

Version 2.1

(bugfix release, released on June 14th 2014)

  • fixed the :func:`launch` function on windows.
  • improved the colorama support on windows to try hard to not screw up the console if the application is interrupted.
  • fixed windows terminals incorrectly being reported to be 80 characters wide instead of 79
  • use colorama win32 bindings if available to get the correct dimensions of a windows terminal.
  • fixed an issue with custom function types on Python 3.
  • fixed an issue with unknown options being incorrectly reported in error messages.

Version 2.0

(codename "tap tap tap", released on June 6th 2014)

  • added support for opening stdin/stdout on Windows in binary mode correctly.
  • added support for atomic writes to files by going through a temporary file.
  • introduced :exc:`BadParameter` which can be used to easily perform custom validation with the same error messages as in the type system.
  • added :func:`progressbar`; a function to show progress bars.
  • added :func:`get_app_dir`; a function to calculate the home folder for configs.
  • Added transparent handling for ANSI codes into the :func:`echo` function through colorama.
  • Added :func:`clear` function.
  • Breaking change: parameter callbacks now get the parameter object passed as second argument. There is legacy support for old callbacks which will warn but still execute the script.
  • Added :func:`style`, :func:`unstyle` and :func:`secho` for ANSI styles.
  • Added an :func:`edit` function that invokes the default editor.
  • Added an :func:`launch` function that launches browsers and applications.
  • nargs of -1 for arguments can now be forced to be a single item through the required flag. It defaults to not required.
  • setting a default for arguments now implicitly makes it non required.
  • changed "yN" / "Yn" to "y/N" and "Y/n" in confirmation prompts.
  • added basic support for bash completion.
  • added :func:`getchar` to fetch a single character from the terminal.
  • errors now go to stderr as intended.
  • fixed various issues with more exotic parameter formats like DOS/Windows style arguments.
  • added :func:`pause` which works similar to the Windows pause cmd built-in but becomes an automatic noop if the application is not run through a terminal.
  • added a bit of extra information about missing choice parameters.
  • changed how the help function is implemented to allow global overriding of the help option.
  • added support for token normalization to implement case insensitive handling.
  • added support for providing defaults for context settings.

Version 1.1

(bugfix release, released on May 23rd 2014)

  • fixed a bug that caused text files in Python 2 to not accept native strings.

Version 1.0

(no codename, released on May 21st 2014)

  • Initial release.