Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Update Rust crate clap to v4 #28

Open
wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Update Rust crate clap to v4 #28

wants to merge 1 commit into from

Conversation

renovate[bot]
Copy link
Contributor

@renovate renovate bot commented Sep 28, 2022

This PR contains the following updates:

Package Type Update Change
clap dependencies major 3.2.25 -> 4.0.0

Release Notes

clap-rs/clap (clap)

v4.5.20

Compare Source

Features
  • (unstable) Add CommandExt

v4.5.19

Compare Source

Internal
  • Update dependencies

v4.5.18

Compare Source

Features
  • (builder) Expose Arg::get_display_order and Command::get_display_order

v4.5.17

Compare Source

Fixes
  • (help) Style required argument groups
  • (derive) Improve error messages when unsupported fields are used

v4.5.16

Compare Source

Fixes
  • (derive) Improve error messages when derive feature is missing

v4.5.15

Compare Source

Compatiblity
  • (unstable-ext) Arg::remove changed return types
Fixes
  • (unstable-ext) Make Arg::remove return the removed item

v4.5.14

Compare Source

Features
  • (unstable-ext) Added Arg::add for attaching arbitrary state, like completion hints, to Arg without Arg knowing about it

v4.5.13

Compare Source

Fixes
  • (derive) Improve error message when #[flatten]ing an optional #[group(skip)]
  • (help) Properly wrap long subcommand descriptions in help

v4.5.12

Compare Source

v4.5.11

Compare Source

v4.5.10

Compare Source

v4.5.9

Compare Source

Fixes
  • (error) When defining a custom help flag, be sure to suggest it like we do the built-in one

v4.5.8

Compare Source

Fixes
  • Reduce extra flushes

v4.5.7

Compare Source

Fixes
  • Clean up error message when too few arguments for num_args

v4.5.6

Compare Source

v4.5.5

Compare Source

Fixes
  • Allow exclusive to override required_unless_present, required_unless_present_any, required_unless_present_all

v4.5.4

Compare Source

Fixes
  • (derive) Allow non-literal #[arg(id)] attributes again

v4.5.3

Compare Source

Internal
  • (derive) Update heck

v4.5.2

Compare Source

Features
  • (unstable) Add CommandExt

v4.5.1

Compare Source

Internal
  • Update dependencies

v4.5.0

Compare Source

Compatibility
  • Update MSRV to 1.74

v4.4.18

Compare Source

Fixes
  • (error) When lacking usage feature, ensure the list of required arguments is unique

v4.4.17

Compare Source

Fixes
  • Fix panic! when mixing args_conflicts_with_subcommands with ArgGroup (which is implicit with derive) introduced in 4.4.15

v4.4.16

Compare Source

Fixes
  • Ensure invalid escape sequences in user-defined strings are correctly stripped when terminal doesn't support color

v4.4.15

Compare Source

Fixes
  • Improve error for args_conflicts_with_subcommands
  • Ensure we error for args_conflicts_with_subcommands when using subcommand short and long flags

v4.4.14

Compare Source

Documentation
  • Fix find cookbook entry to allow repeats of flags/options
Features
  • Allow num_args(0) on options which allows making them emulate being a flag for position-tracking flags

v4.4.13

Compare Source

Documentation
  • Fix link to structopt migration guide

v4.4.12

Compare Source

Performance
  • Only ask TypedValueParser for possible values if needed

v4.4.11

Compare Source

Features
  • Add Command::mut_group

v4.4.10

Compare Source

Documentation
  • Link out to changelog
  • Cross link derive's attribute reference to derive tutorial

v4.4.9

Compare Source

Fixes
  • (help) Show correct Command::about under flattened headings
  • (help) Respect hide when flattening subcommands

v4.4.8

Compare Source

Features
  • Add Command::flatten_help to allow git stash -h like help for subcommands

v4.4.7

Compare Source

Performance
  • Reduced code size

v4.4.6

Compare Source

Internal
  • Upgrade anstream

v4.4.5

Compare Source

Fixes
  • (parser) When inferring subcommand name or long_flag, allow ambiguous-looking matches that unambiguously map back to the same command
  • (parser) When inferring subcommand long_flag, don't panic
  • (assert) Clarify what action is causing a positional that doesn't set values which is especially useful for derive users

v4.4.4

Compare Source

Internal
  • Update terminal_size to 0.3

v4.4.3

Compare Source

Documentation
  • (derive) Clarify use of attributes within the tutorial
  • Split sections in the builder and derive tutorials into separate modules

v4.4.2

Compare Source

Performance
  • Improve build times by removing once_cell dependency

v4.4.1

Compare Source

Fixes
  • (error) When lacking usage feature, ensure the list of required arguments is unique

v4.4.0

Compare Source

compatibility
  • update msrv to 1.70.0

v4.3.24

Compare Source

Fixes
  • Ensure column padding is preserved in --help with custom templates

v4.3.23

Compare Source

Fixes
  • Fixed UnknownArgumentValueParser to not error on flag's absence

v4.3.22

Compare Source

Features
  • Add UnknownArgumentValueParser for injecting errors for improving the experience with errors

v4.3.21

Compare Source

Features
  • Expose TryMapValueParser so the type can be named

v4.3.20

Compare Source

Features
  • Command::mut_args for modifying all arguments en masse

v4.3.19

Compare Source

Fixes
  • (parse) Respect value_terminator even in the presence of later multiple-value positional arguments

v4.3.18

Compare Source

Fixes
  • (parse) Suggest -- in fewer places where it won't work

v4.3.17

Compare Source

Fixes
  • (help) Address a regression in wrapping PossibleValue descriptions in --help

v4.3.16

Compare Source

Fixes
  • Don't assert when stateful value parsers fail on defaults (e.g. checking if a path exists)

v4.3.15

Compare Source

Features
  • (unstable-styles) Re-export anstyle
Documentation
  • (unstable-styles) Provide more examples

v4.3.14

Compare Source

Features
  • ArgAction::HelpShort and ArgAction::HelpLong for explicitly specifying which style of help to display
Fixes
  • Skip [OPTIONS] in usage if a help or version ArgAction is used

v4.3.13

Compare Source

v4.3.12

Compare Source

Fixes
  • (derive) Don't error on enum variant field attributes

v4.3.11

Compare Source

Features
  • (derive) Support fields wrapped in num::Wrapping, Box, or Arc
  • (derive) Support Box<str>, Box<OsStr>, and Box<Path>

v4.3.10

Compare Source

Performance
  • Drop a dependency, reducing binary size by 1.3 KiB

v4.3.9

Compare Source

Fixes
  • Command::ignore_errors no longer masks help/version

v4.3.8

Compare Source

Fixes
  • Error on ambiguity with infer_long_arg, rather than arbitrarily picking one, matching the documentation and subcommand's behavior

v4.3.7

Compare Source

Documentation
  • Further clarify magic behavior in derive tutorial
  • Further clarify derive API's relationship to builder within the tutorial

v4.3.6

Compare Source

Documentation
  • Suggest clio

v4.3.5

Compare Source

  • ColorChoice::possible_values is added to simplify things for builder users
Fixes
  • ColorChoice::to_possible_value no longer includes descriptions, encouraging shorter help where possible

v4.3.4

Compare Source

Features
  • Add Error::exit_code

v4.3.3

Compare Source

Features
  • Command::defer for delayed initialization of subcommands to reduce startup times of large applications like deno

v4.3.2

Compare Source

Fixes
  • Ensure column padding is preserved in --help with custom templates

v4.3.1

Compare Source

Fixes
  • (parse) Respect value_terminator even in the presence of later multiple-value positional arguments

v4.3.0

Compare Source

Fixes
  • (assert) Allow multiple, value-terminated, positional arguments
  • (assert) Clear up language on last assertion
  • (parser) Correctly assign values to arguments when using multiple, value-termianted, positional arguments
  • (parser) Ensure value_terminator has higher precedence than allow_hyphen_values
  • (help) Only use next-line-help on subcommand list when explicitly specified, not just with --help
  • (help) Correctly align possible values list
  • (help) Don't waste code, vertical space in moving possible value descriptions to next line

v4.2.7

Compare Source

Fixes
  • Correctly track remaining length for iterators provided by ArgMatches

v4.2.6

Compare Source

Features
  • impl Eq<std::any::TypeId> for clap_builder::util::AnyValueId

v4.2.5

Compare Source

Fixes
  • Improve panic when a group requires a non-existent ID

v4.2.4

Compare Source

Documentation
  • Corrected docs for Command::style

v4.2.3

Compare Source

Features
  • Command::styles for theming help/errors (behind unstable-styles)

v4.2.2

Compare Source

Internal
  • Update dependencies

v4.2.1

Compare Source

Fixes
  • Don't highlight uninteresting parts of the error message

v4.2.0

Compare Source

Compatibility
  • Removed the languishing unstable-replace feature (open to discussion at #​2836)
  • Removed the stablized unstable-grouped feature
Features
  • Allow any StyledStr to accept text styled with ANSI escape codes
  • Respect CLICOLOR, CLICOLOR_FORCE
Fixes
  • Lighten the tone for "unexpected argument" errors (open to discussion at #​4638)

v4.1.14

Compare Source

Features
  • (derive) #[group] raw attribute support
Performance
  • (derive) clap_builder was pulled out of clap so it could build in parallel to clap_derive
  • os_str_bytes dependency was removed for faster builds and smaller binaries

v4.1.13

Compare Source

Performance
  • Reduce repeated alloc calls when building a Command
  • Reduce duplicate dependencies for faster builds

v4.1.12

Compare Source

Internal
  • (derive) Update to syn v2
Performance
  • (derive) Faster build times by dropping proc-macro-error dependency

v4.1.11

Compare Source

Internal
  • Update bitflags

v4.1.10

Compare Source

Fixes
  • (help) On Windows, avoid underlined text artifacts

v4.1.9

Compare Source

Fixes
  • (assert) Improve the assert when using the wrong action with get_count / get_flag

v4.1.8

Compare Source

Fixes
  • (derive) Don't deny lints on the users behalf

v4.1.7

Compare Source

Fixes
  • (derive) Hide some nightly clippy warnings

v4.1.6

Compare Source

Fixes
  • (help) Don't show long help for --help just because hidden possible values include a description

v4.1.5

Compare Source

Fixes
  • (help) Don't show long help for --help just because a hidden arg has a possible value with a description

v4.1.4

Compare Source

Fixes
  • (help) Respect disable_colored_help when using arg_required_else_help
Performance
  • Speed up compiling arg! macro

v4.1.3

Compare Source

Fixes
  • (error) Improve suggested flag/value/subcommand when two share a long preifx
  • (error) When suggesting one of several subcommands, use the plural subcommands, rather than subcommand

v4.1.2

Compare Source

Fixes
  • In documentation, refer to get_flag, rather than get_one::<bool>

v4.1.1

Compare Source

Features
  • (derive) #[group] raw attribute support
Performance
  • (derive) clap_builder was pulled out of clap so it could build in parallel to clap_derive
  • os_str_bytes dependency was removed for faster builds and smaller binaries

v4.1.0

Compare Source

Compatibility

MSRV changed to 1.64.0

For apps with custom --help and --version flags:

  • Descriptions for --help and --version changed

When apps have errors imitating clap's error style:

  • Error message style was changed, including
    • Moving away from "did you mean" to tips
    • Leading letter is lower case
    • "For more" added some punctuation
Features
  • ArgMatches::get_occurrences support for argument values to be grouped by their occurrence
Fixes
  • (derive) Allow upgrade_from when arguments / subcommands are explicitly marked as required
  • (help) Try be more clearer and succinct with --help and --version (also helps with overflow)
  • (error) Try to be more clearer and succinct with error messages
  • (error) Officially adopt an error style guide

v4.0.32

Compare Source

Fixes
  • (parser) When overriding required(true), consider args that conflict with its group

v4.0.31

Compare Source

Performance
  • Speed up parsing when a lot of different flags are present (100 unique flags)

v4.0.30

Compare Source

Fixes
  • (error) Improve error for args_conflicts_with_subcommand

v4.0.29

Compare Source

v4.0.28

Compare Source

Fixes
  • Fix wasm support which was broken in 4.0.27

v4.0.27

Compare Source

Features
  • Have Arg::value_parser accept Vec<impl Into<PossibleValue>>
  • Implement Display and FromStr for ColorChoice
Fixes
  • Remove soundness issue by switching from atty to is-terminal

v4.0.26

Compare Source

Fixes
  • (error) Fix typos in ContextKind::as_str

v4.0.25

Compare Source

Features
  • (error) Report available subcommands when required subcommand is missing

v4.0.24

Compare Source

Fixes
  • Avoid panic when printing an argument that isn't built

v4.0.23

Compare Source

Fixes
  • Don't panic on reporting invalid-long errors when followed by invalid UTF8
  • (help) Clarified argument to help subcommand

v4.0.22

Compare Source

Fixes
  • (help) Don't overflow into next-line-help early due to stale (pre-v4) padding calculations

v4.0.21

Compare Source

Features
  • (derive) long_about and long_help attributes, without a value, force using doc comment (before it wouldn't be set if there wasn't anything different than the short help)

v4.0.20

Compare Source

Fixes
  • (derive) Allow defaulted value parser for '()' fields

v4.0.19

Compare Source

Features
  • ColorChoice now implements ValueEnum

v4.0.18

Compare Source

Fixes
  • (derive) Allow #[command(skip)] to also work with enum variants with a value

v4.0.17

Compare Source

Fixes
  • Allow using Arg::last(true) with Arg::value_hint(ValueHint::CommandWithArguments)

v4.0.16

Compare Source

Fixes
  • Arg::exclusive(true) should not be exclusive with the argument's own ArgGroup

v4.0.15

Compare Source

Fixes
  • (error) Don't suggest -- when it doesn't help
  • (error) Be more consistent in quoting, punctuation, and indentation in errors

v4.0.14

Compare Source

Fixes
  • Only put ArgGroup in ArgMatches when explicitly specified, fixing derives handling of option-flattened fields (#​4375)

v4.0.13

Compare Source

Features
  • (derive) Allow () for fields to mean "don't read" (#​4371)

v4.0.12

Compare Source

Features
  • Added TypedValueParser::try_map for when adapting an existing TypedValueParser can fail
  • (error) Create errors like clap with Error::new, Error::with_cmd, and Error::insert

v4.0.11

Compare Source

Fixes
  • (help) Fix wrapping calculations with ANSI escape codes

v4.0.10

Compare Source

Features

v4.0.9

Compare Source

Fixes
  • (derive) Process doc comments for #[command(subcommand)] like in clap v3

v4.0.8

Compare Source

Fixes
  • (derive) Remove a low-value assert preventing defaulting Help and Version actions

v4.0.7

Compare Source

Features
  • (derive) Populate implicit ArgGroup (#​3165)
Fixes
  • (derive) Support #[group(skip)] on Parser derive
  • (derive) Tell users about implicit arg groups when running into group name conflicts
  • (error) Don't report unrelated groups in conflict or requires errors

v4.0.6

Compare Source

Features

v4.0.5

Compare Source

v4.0.4

Compare Source

Fixes
  • (error) Specialize the self-conflict error to look like clap v3

v4.0.3

Compare Source

Fixes
  • (parser) When overriding required(true), consider args that conflict with its group

v4.0.2

Compare Source

v4.0.1

Compare Source

Features
  • ColorChoice now implements ValueEnum

v4.0.0

Compare Source

Highlights

Arg::num_args(range)

Clap has had several ways for controlling how many values will be captured without always being clear on how they interacted, including

  • Arg::multiple_values(true)
  • Arg::number_of_values(4)
  • Arg::min_values(2)
  • Arg::max_values(20)
  • Arg::takes_value(true)

These have now all been collapsed into Arg::num_args which accepts both
single values and ranges of values. num_args controls how many raw arguments
on the command line will be captured as values per occurrence and independent
of value delimiters.

See Issue 2688 for more background.

Polishing Help

Clap strives to give a polished CLI experience out of the box with little
ceremony. With some feedback that has accumulated over time, we took this
release as an opportunity to re-evaluate our --help output to make sure it is
meeting that goal.

In doing this evaluation, we wanted to keep in mind:

  • Whether other CLIs had ideas that make sense to apply
  • Providing an experience that fits within the rest of applications and works across all shells

Before:

git
A fictional versioning CLI

USAGE:
    git <SUBCOMMAND>

OPTIONS:
    -h, --help    Print help information

SUBCOMMANDS:
    add      adds things
    clone    Clones repos
    help     Print this message or the help of the given subcommand(s)
    push     pushes things
    stash

After:

A fictional versioning CLI

Usage: git <COMMAND>

Commands:
  clone  Clones repos
  push   pushes things
  add    adds things
  stash
  help   Print this message or the help of the given subcommand(s)

Options:
  -h, --help  Print help information
  • name/version header was removed because we couldn't justify the space it occupied when
    • Usage already includes the name
    • --version is available for showing the same thing (if the program has a version set)
  • Usage was dropped to one line to save space
  • Focus is put on the subcommands
  • Headings are now Title case
  • The more general term "command" is used rather than being explicit about being "subcommands"
  • The output is more dense with the expectation that it won't affect legibility but will allow more content
  • We've moved to a more neutral palette for highlighting elements (not highlighted above)

In talking to users, we found some that liked clap's man-like experience.
When deviating from this, we are making the assumption that those are more
power users and that the majority of users wouldn't look as favorably on being
consistent with man.

See Issue 4132 for more background.

More Dynamicism

Clap's API has focused on &str for performance but this can make
dealing with owned data difficult, like #[arg(default_value_t)] generating a
String from the default value.

Additionally, to avoid ArgMatches from borrowing (and for some features we
decided to forgo), clap took the &str argument IDs and hashed them. This
prevented us from providing a usable API for iterating over existing arguments.

Now clap has switched to a string newtype that gives us the flexibility to
decide whether to use &'static str, Cow<'static, str> for fast dynamic behavior, or
Box<str> for dynamic behavior with small binary size.

As an extension of that work, you can now call ArgMatches::ids to iterate
over the arguments and groups that were found when parsing. The newtype Id
was used to prevent some classes of bugs and to make it easier to understand
when opaque Ids are used vs user-visible strings.

Clearing Out Deprecations

Instead of doing all development on clap 4.0.0, we implemented a lot of new features during clap 3's development, deprecating the old API while introducing the new API, including:

  • Replacing the implicit behavior for args when parsing them with ArgAction
  • Replacing various one-off forms of value validation with the ValueParser API
    • Allowing derives to automatically do the right thing for PathBuf (allowing invalid UTF-8)
  • Replacing AppSettings and ArgSettings enums with getters/setters
  • Clarifying terms and making them more consistent
Migrating

Steps:

  1. Upgrade to v3 if you haven't already
  2. Add CLI tests (including example below), -h and --help output at a minimum (recommendation: trycmd for snapshot testing)
  3. If using Builder API: Explicitly set the arg.action(ArgAction::...) on each argument (StoreValue for options and IncOccurrences for flags)
  4. Run cargo check --features clap/deprecated and resolve all deprecation warnings
  5. Upgrade to v4
  6. Update feature flags
  • If default-features = false, run cargo add clap -F help,usage,error-context
  • Run cargo add clap -F wrap_help unless you want to hard code line wraps
  1. Resolve compiler errors
  2. Resolve behavior changes (see "subtle changes" under BREAKING CHANGES)
  3. At your leisure: resolve new deprecation notices

Example test (derive):

#[derive(clap::Parser)]
struct Cli {
    ...
}

#[test]
fn verify_cli() {
    use clap::CommandFactory;
    Cli::command().debug_assert()
}

Example test (builder):

fn cli() -> clap::Command {
    ...
}

#[test]
fn verify_cli() {
    cli().debug_assert();
}

Note: the idiomatic / recommended way of specifying different types of args in the Builder API has changed:

Before

.arg(Arg::new("flag").long("flag"))  # --flag
.arg(Arg::new("option").long("option").takes_value(true))  # --option <option>

After:

.arg(Arg::new("flag").long("flag").action(ArgAction::SetTrue))  # --flag
.arg(Arg::new("option").long("option"))  # --option <option>

In particular, num_args (the replacement for takes_value) will default appropriately
from the ArgAction and generally only needs to be set explicitly for the
other num_args use cases.

Breaking Changes

Subtle changes (i.e. compiler won't catch):

  • arg! now sets one of (#​3795):
    • ArgAction::SetTrue, requiring ArgMatches::get_flag instead of ArgMatches::is_present
    • ArgAction::Count, requiring ArgMatches::get_count instead of ArgMatches::occurrences_of
    • ArgAction::Set, requiring ArgMatches::get_one instead of ArgMatches::value_of
    • ArgAction::Append, requiring ArgMatches::get_many instead of ArgMatches::values_of
  • ArgAction::Set, ArgAction::SetTrue, and Arg::Action::SetFalse now
    conflict by default to be like ArgAction::StoreValue and
    ArgAction::IncOccurrences, requiring cmd.args_override_self(true) to override instead (#​4261)
  • By default, an Args default action is ArgAction::Set, rather than ArgAction::IncOccurrence to reduce confusing magic through consistency (#​2687, #​4032, see also #​3977)
  • mut_arg can no longer be used to customize help and version arguments, instead disable them (Command::disable_help_flag, Command::disable_version_flag) and provide your own (#​4056)
  • Removed lifetimes from Command, Arg, ArgGroup, and PossibleValue, assuming 'static. string feature flag will enable support for Strings (#​1041, #​2150, #​4223)
  • arg!(--flag <value>) is now optional, instead of required. Add .required(true) at the end to restore the original behavior (#​4206)
  • Added default feature flags, help, usage and error-context, requiring adding them back in if default-features = false (#​4236)
  • (parser) Always fill in "" argument for external subcommands to make it easier to distinguish them from built-in commands (#​3263)
  • (parser) Short flags now have higher precedence than hyphen values with Arg::allow_hyphen_values, to be consistent with Command::allow_hyphen_values (#​4187)
  • (parser) Arg::value_terminator must be its own argument on the CLI rather than being in a delimited list (#​4025)
  • (help) Line wrapping of help is now behind the existing wrap_help feature flag, either enable it or hard code your wraps (#​4258)
  • (help) Make DeriveDisplayOrder the default and removed the setting. To sort help, set next_display_order(None) (#​2808)
  • (help) Subcommand display order respects Command::next_display_order instead of DeriveDisplayOrder and using its own initial display order value (#​2808)
  • (help) Subcommands are now listed before arguments. To get the old behavior, see Command::help_template (#​4132)
  • (help) Help headings are now title cased, making any user-provided help headings inconsistent. To get the old behavior, see Command::help_template, Arg::help_heading, and Command::subcommand_help_heading (#​4132)
  • (help) "Command" is used as the section heading for subcommands and COMMAND for the value name. To get the old behavior, see Command::subcommand_help_heading and Arg::subcommand_value_name (#​4132, #​4155)
  • (help) Whitespace in help output is now trimmed to ensure consistency regardless of how well a template matches the users needs. (#​4132, #​4156)
  • (help) name/version/author are removed by default from help output. To get the old behavior, see Command::help_template. (#​4132, #​4160)
  • (help) Indentation for second-line usage changed. (#​4132, #​4188)
  • (env) Parse --help and --version like any ArgAction::SetTrue flag (#​3776)
  • (derive) Leave Arg::id as verbatim casing, requiring updating of string references to other args like in conflicts_with or requires (#​3282)
  • (derive) Doc comments for ValueEnum variants will now show up in --help (#​3312)
  • (derive) When deriving Args, and ArgGroup is created using the type's name, reserving it for future use (#​2621, #​4209)
  • (derive) next_help_heading can now leak out of a #[clap(flatten)], like all other command settings (#​4222)

Easier to catch changes:

  • Looking up a group in ArgMatches now returns the arg Ids, rather than the values to reduce overhead and offer more flexibility. (#​4072)
  • Changed Arg::number_of_values (average-across-occurrences) to Arg::num_args (per-occurrence) (raw CLI args, not parsed values) (#​2688, #​4023)
    • num_args(0) no longer implies takes_value(true).multiple_values(true) (#​4023)
    • num_args(1) no longer implies multiple_values(true) (#​4023)
    • Does not check default or env values, only what the user explicitly passes in (#​4025)
    • No longer terminates on delimited values (#​4025)
  • Replace Arg::min_values (across all occurrences) with Arg::num_args(N..) (per occurrence) to reduce confusion over different value count APIs (#​4023)
  • Replace Arg::max_values (across all occurrences) with Arg::num_args(1..=M) (per occurrence) to reduce confusion over different value count APIs (#​4023)
  • Replace Arg::multiple_values(true) with Arg::num_args(1..) and Arg::multiple_values(false) with Arg::num_args(0) to reduce confusion over different value count APIs (#​4023)
  • Replace Arg::takes_value(true) with Arg::num_args(1) and Arg::takes_value(false) with Arg::num_args(0) to reduce confusion over different value count APIs
  • Remove Arg::require_value_delimiter, either users could use Arg::value_delimiter or implement a custom parser with TypedValueParser as it was mostly to make multiple_values(true) act like multiple_values(false) and isn't needed anymore (#​4026)
  • Arg::new("help") and Arg::new("version") no longer implicitly disable the
    built-in flags and be copied to all subcommands, instead disable
    the built-in flags (Command::disable_help_flag,
    Command::disable_version_flag) and mark the custom flags as global(true). (#​4056)
  • Arg::short('h') no longer implicitly disables the short flag for help,
    instead disable
    the built-in flags (Command::disable_help_flag,
    Command::disable_version_flag) provide your own Arg::new("help").long("help").action(ArgAction::Help).global(true). (#​4056)
  • ArgAction::SetTrue and ArgAction::SetFalse now prioritize Arg::default_missing_value over their standard behavior (#​4000)
  • Changed Arg::requires_ifs and Arg::default_value*_ifs* to taking an ArgPredicate, removing ambiguity with None when accepting owned and borrowed types (#​4084)
  • Removed PartialEq and Eq from Command so we could change external subcommands to use a ValueParser (#​3990)
  • Various Arg, Command, and ArgGroup calls were switched from accepting &[] to [] via IntoIterator to be more flexible (#​4072)
  • Arg::short_aliases and other builder functions that took &[] need the & dropped (#​4081)
  • ErrorKind and Result moved into the error module
  • ErrorKind::EmptyValue replaced with ErrorKind::InvalidValue to remove an unnecessary special case (#​3676, #​3968)
  • ErrorKind::UnrecognizedSubcommand replaced with ErrorKind::InvalidSubcommand to remove an unnecessary special case (#​3676)
  • Changed the default type of allow_external_subcommands from String to OsString as that is less likely to cause bugs in user applications (#​3990)
  • (help) Command::render_usage now returns a StyledStr (#​4248)
  • (derive) Changed the default for arguments from parse to value_parser, removing parse support (#​3827, #​3981)
    • #[clap(value_parser)] and #[clap(action)] are now redundant
  • (derive) subcommand_required(true).arg_required_else_help(true) is set instead of SubcommandRequiredElseHelp to give more meaningful errors when subcommands are missing and to reduce redundancy (#​3280)
  • (derive) Remove arg_enum attribute in favor of value_enum to match the new name (we didn't have support in v3 to mark it deprecated) (#​4127)
  • (parser) Assert when the CLI looksup an unknown args when external subcommand support is enabled to help catch bugs (#​3703)
  • (assert) Sometimes Arg::default_missing_value didn't require num_args(0..=N), now it does (#​4023)
  • (assert) Leading dashes in Arg::long are no longer allowed (#​3691)
  • (assert) Disallow more value_names than num_args (#​2695)
  • (assert) Always enforce that version is specified when the ArgAction::Version is used
  • (assert) Add missing #[track_caller]s to make it easier to debug asserts
  • (assert) Ensure overrides_with IDs are valid
  • (assert) Ensure no self-overrides_with now that Actions replace it
  • (assert) Ensure subcommand names are not duplicated
  • (assert) Assert on mut_arg receiving an invalid arg ID or mut_subcommand receiving an invalid command name
Compatibility

MSRV is now 1.60.0

Deprecated

  • Arg::use_value_delimiter in favor of Arg::value_delimiter to avoid having multiple ways of doing the same thing
  • Arg::requires_all in favor of Arg::requires_ifs now that it takes an ArgPredicate to avoid having multiple ways of doing the same thing
  • Arg::number_of_values in favor of Arg::num_args to clarify semantic differences
  • default_value_os, default_values_os, default_value_if_os, and default_value_ifs_os as the non _os variants now accept either a str or an OsStr (#​4141)
  • Arg::env_os in favor of Arg::env
  • Command::dont_collapse_args_in_usage is now the default (#​4151)
  • Command::trailing_var_arg in favor of Arg::trailing_var_arg to make it clearer which arg it is meant to apply to (#​4187)
  • Command::allow_hyphen_values in favor of Arg::allow_hyphen_values to make it clearer which arg it is meant to apply to (#​4187)
  • Command::allow_negative_numbers in favor of Arg::allow_negative_numbers to make it clearer which arg it is meant to apply to (#​4187)
  • (help) Deprecated Command::write_help and Command::write_long_help in favor of Command::render_help and Command::render_long_help (#​4248)
  • (derive) structopt and clap attributes in favor of the more specific command, arg, and value to open the door for more features and clarify relationship to the builder (#​1807, #​4180)
  • (derive) #[clap(value_parser)] and #[clap(action)] defaulted attributes (its the default) (#​3976)

Behavior Changes

  • (help) With wrap_help feature, if the terminal size cannot be determined, LINES and COLUMNS variables are used (#​4186)
Features
  • Arg::num_args now accepts ranges, allowing setting both the minimum and maximum number of values per occurrence (#​2688, #​4023)
  • Allow non-bool value_parsers for ArgAction::SetTrue / ArgAction::SetFalse (#​4092)
  • Add From<&OsStr>, From<OsString>, From<&str>, and From<String> to value_parser! (#​4257)
  • Allow resetting most builder methods
  • Can now pass runtime generated data to Command, Arg, ArgGroup, PossibleValue, etc without managing lifetimes with the string feature flag (#​2150, #​4223)
  • New default error-context, help and usage feature flags that can be turned off for smaller binaries ([#​4236](https://redire

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.


  • If you want to rebase/retry this PR, check this box

This PR was generated by Mend Renovate. View the repository job log.

@renovate renovate bot force-pushed the renovate/clap-4.x branch 7 times, most recently from 5751b38 to a2ce8a4 Compare October 4, 2022 00:07
@renovate renovate bot force-pushed the renovate/clap-4.x branch 5 times, most recently from b49b80b to 1cd694c Compare October 12, 2022 16:16
@renovate renovate bot force-pushed the renovate/clap-4.x branch 3 times, most recently from 57e2b44 to d0faa37 Compare October 18, 2022 14:20
@renovate renovate bot force-pushed the renovate/clap-4.x branch 2 times, most recently from 4d8a7cf to 0ead75c Compare October 24, 2022 21:01
@renovate renovate bot force-pushed the renovate/clap-4.x branch 4 times, most recently from 8cbd922 to 83f6744 Compare November 7, 2022 20:46
@renovate renovate bot force-pushed the renovate/clap-4.x branch 4 times, most recently from 54aeba8 to efaf057 Compare November 16, 2022 16:47
@renovate renovate bot force-pushed the renovate/clap-4.x branch 4 times, most recently from 30316b5 to 36573bc Compare November 29, 2022 15:15
@renovate renovate bot force-pushed the renovate/clap-4.x branch 3 times, most recently from 894a83d to 79007ac Compare August 24, 2023 19:13
@renovate renovate bot force-pushed the renovate/clap-4.x branch 2 times, most recently from ef51dd4 to 8a22da4 Compare August 31, 2023 19:18
@renovate renovate bot force-pushed the renovate/clap-4.x branch 3 times, most recently from 784a3c9 to 9bb366e Compare September 18, 2023 15:41
@renovate renovate bot force-pushed the renovate/clap-4.x branch 2 times, most recently from e114239 to a19bde6 Compare September 28, 2023 21:29
@renovate renovate bot force-pushed the renovate/clap-4.x branch 2 times, most recently from 20f429c to ae64c8f Compare November 28, 2023 04:02
@renovate renovate bot force-pushed the renovate/clap-4.x branch 2 times, most recently from eb9d9ef to a555e0e Compare January 4, 2024 19:58
@renovate renovate bot force-pushed the renovate/clap-4.x branch 4 times, most recently from 23242c1 to 66fb88b Compare January 15, 2024 16:41
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
None yet
Projects
None yet
Development

Successfully merging this pull request may close these issues.

0 participants