Update dependency click to ~=8.5

This MR contains the following updates:

Package	Change	Age	Confidence
click (changelog)	~=8.4 -> ~=8.5

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Release Notes

pallets/click (click)

v8.5.0

Compare Source

Released 2026-08-24

• Add built-in shell completion support for PowerShell (Windows PowerShell 5.1+ and pwsh 7+) alongside the existing bash, zsh, and fish completers. Use _FOO_BAR_COMPLETE=powershell_source foo-bar to generate the completion script. {issue}2672 {pr}3637
• Supported versions of Windows enable ANSI terminal styles by default. Colorama is no longer a dependency and is not used. {issue}2986 {pr}3505
• {class}Argument accepts a help parameter, and help output includes a Positional arguments section when argument help is available. {issue}2983 {pr}3473
• confirm() and prompt() strip ANSI color and style codes from the prompt when the output stream does not support them, matching echo(). This stripping was lost in 8.4.0 when {pr}2969 began writing the prompt with input() directly. {issue}3572 {pr}3653
• Fix test failures when using pytest >= 9.1. {pr}3656
• {class}Path with allow_dash=True no longer triggers a BytesWarning, an error under python -bb, when checking a value against the - convention. {issue}2877 {pr}3642
• Add {func}custom_version_option, a --version option whose output is produced by a callback, covering cases {func}version_option intentionally does not. The feature set of {func}version_option is now frozen; see discussion #​3527. {pr}3581
• style() and secho() no longer silently drop the 256-color index 0 (black) passed as fg or bg, and now validate color arguments. Invalid colors raise a ValueError instead of a TypeError. {pr}3677
• The automatic help option stores its value under the reserved name _click_default_help instead of help, so a parameter named help no longer breaks parsing. The new name is visible in {meth}Command.to_info_dict output. Parameters that overwrite each other's value trigger a warning: an argument sharing its name with another parameter, or any parameter claiming the reserved name. Options may still share a name to compete for the same value (feature switches). {issue}2819 {pr}3678
• unstyle and the ANSI handling behind help-text wrapping now strip the full CSI escape-sequence grammar. {pr}3681
• Streamline Option flag handling: the flag-kind, type, lazy-default and validation steps in Option.__init__ move into focused helpers, and flag_value and default keep their unset sentinel at construction (resolved lazily on read) so is UNSET reliably tells a user-supplied value from an auto-derived one. Runtime behavior is unchanged, but {meth}Parameter.to_info_dict now resolves default=True on a feature switch to its flag_value, matching what the function receives at call time. {pr}3641
• {func}get_binary_stream and {func}get_text_stream are deprecated and will be removed in Click 9.0. {issue}3481 {pr}3695
• The following click.utils names were never intentionally public and are now private (_-prefixed). The old names remain available with a DeprecationWarning until Click 9.0: LazyFile, KeepOpenFile, make_default_short_help, PacifyFlushWrapper, and safecall. {issue}3099 {pr}3695
• Deprecate {meth}CliRunner.isolated_filesystem. It relies on {func}os.chdir, which mutates process-global state and is not thread-safe. The helper predates Python 3 and modern pytest: use a temporary directory ({class}tempfile.TemporaryDirectory or pytest's tmp_path fixture) with absolute paths instead. For running tests in parallel, use process-based isolation (such as pytest-xdist) rather than threads, since {meth}CliRunner.invoke also redirects the process-global standard streams. {issue}3501 {issue}3700 {pr}3704
• prompt() is now generically typed and returns the type produced by type, value_proc, or a matching default instead of Any. {class}ParamType takes a second optional type parameter describing the input value it accepts (ParamType[int, str] for a type converting strings to integers), defaulting to Any. {pr}3407
• {meth}Command.get_help_option_names returns the help option names in the order they were declared. {pr}3728
• {func}get_pager_file yields a text stream on Windows again. The temporary file backend opened its file in binary mode, so writing a str to the pager raised TypeError: a bytes-like object is required, not 'str', and the color argument was ignored on that path. Regression introduced in 8.4.0 by {pr}1572. {issue}3731 {issue}3732 {issue}3740 {pr}3739
• {func}progressbar settles on its final position when update_min_steps does not divide the total. Steps below that threshold are applied when the bar finishes, so show_pos renders 20/20 rather than the last multiple it reached. {issue}3571 {pr}3769
• An error raised while writing to the pager no longer gets replaced by PermissionError: [WinError 32] on Windows. The temporary file backend unlinked its file without closing it first, and Windows refuses to remove a file the process still holds open, so the cleanup failure masked the real exception. {issue}3731 {pr}3764
• The temporary file the pager writes to on Windows is opened with the encoding {func}get_pager_file picked for the output stream, and with errors="replace" to match the pipe backend. Any text stdout can encode reaches the pager.
• The temporary file pager backend forwards any parameters the user set in PAGER to the pager command instead of silently dropping them. On Windows, PAGER="less -R" now invokes less -R on the temporary file rather than bare less. {pr}3777
• Improve raw mode detection by parsing the option tokens. {issue}3416 {pr}3777
• {func}edit accepts os.PathLike values for filename, in addition to strings. {issue}2869 {pr}3781

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