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附录B Clippy 配置与模板 ​

有些 Clippy 的 Lint，依赖于一些配置项，如果不想要默认值，可以在 clippy.toml 中进行设置。

# for `disallowed_method`:
# https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_method
disallowed-methods = []


# 函数参数最长不要超过5个
too-many-arguments-threshold=5

Clippy lint 配置模板

// 参考： https://github.com/serde-rs/serde/blob/master/serde/src/lib.rs
#![allow(unknown_lints, bare_trait_objects, deprecated)]
#![cfg_attr(feature = "cargo-clippy", allow(renamed_and_removed_lints))] #![cfg_attr(feature = "cargo-clippy", deny(clippy, clippy_pedantic))]
// Ignored clippy and clippy_pedantic lints
#![cfg_attr(
  feature = "cargo-clippy", allow(
    // clippy bug: https://github.com/rust-lang/rust-clippy/issues/5704
    unnested_or_patterns,
    // clippy bug: https://github.com/rust-lang/rust-clippy/issues/7768
    semicolon_if_nothing_returned,
    // not available in our oldest supported compiler
    checked_conversions, empty_enum,
    redundant_field_names,
    redundant_static_lifetimes,
    // integer and float ser/de requires these sorts of casts
    cast_possible_truncation, cast_possible_wrap,
    cast_sign_loss,
    // things are often more readable this way
    cast_lossless,
    module_name_repetitions,
    option_if_let_else, single_match_else,  type_complexity,
    use_self,
    zero_prefixed_literal,
    // correctly used
    enum_glob_use,
    let_underscore_drop, map_err_ignore,
    result_unit_err,  wildcard_imports,
    // not practical
    needless_pass_by_value, similar_names,
    too_many_lines,
    // preference
    doc_markdown,
    unseparated_literal_suffix,
    // false positive
    needless_doctest_main,
    // noisy
    missing_errors_doc, must_use_candidate,
  ) 
)]
// Rustc lints.
#![deny(missing_docs, unused_imports)]

Embark Studios 的标准 Lint 配置

// BEGIN - Embark standard lints v5 for Rust 1.55+
// do not change or add/remove here, but one can add exceptions after this section
// for more info see: <https://github.com/EmbarkStudios/rust- ecosystem/issues/59>
#![deny(unsafe_code)] #![warn(
  clippy::all,
  clippy::await_holding_lock, clippy::char_lit_as_u8,
  clippy::checked_conversions, clippy::dbg_macro,
  clippy::debug_assert_with_mut_call, clippy::disallowed_method,
  clippy::disallowed_type, clippy::doc_markdown,
  clippy::empty_enum,
  clippy::enum_glob_use, clippy::exit,
  clippy::expl_impl_clone_on_copy, clippy::explicit_deref_methods,  clippy::explicit_into_iter_loop, clippy::fallible_impl_from,
  clippy::filter_map_next,
  clippy::flat_map_option, clippy::float_cmp_const,
  clippy::fn_params_excessive_bools,
  clippy::from_iter_instead_of_collect,
  clippy::if_let_mutex,
  clippy::implicit_clone,  clippy::imprecise_flops,
  clippy::inefficient_to_string,
  clippy::invalid_upcast_comparisons, clippy::large_digit_groups,
  clippy::large_stack_arrays,
  clippy::large_types_passed_by_value, clippy::let_unit_value,
  clippy::linkedlist,
  clippy::lossy_float_literal, clippy::macro_use_imports,
  clippy::manual_ok_or,
  clippy::map_err_ignore, clippy::map_flatten,
  clippy::map_unwrap_or,
  clippy::match_on_vec_items, clippy::match_same_arms,
  clippy::match_wild_err_arm,
  clippy::match_wildcard_for_single_variants, clippy::mem_forget,
  clippy::mismatched_target_os,
  clippy::missing_enforced_import_renames, clippy::mut_mut,
  clippy::mutex_integer,
  clippy::needless_borrow,
  clippy::needless_continue, clippy::needless_for_each, clippy::option_option,
  clippy::path_buf_push_overwrite, clippy::ptr_as_ptr,
  clippy::rc_mutex,
  clippy::ref_option_ref,
  clippy::rest_pat_in_fully_bound_structs, clippy::same_functions_in_if_condition,  clippy::semicolon_if_nothing_returned,
  clippy::single_match_else,
  clippy::string_add_assign, clippy::string_add,
  clippy::string_lit_as_bytes, clippy::string_to_string,
  clippy::todo,
  clippy::trait_duplication_in_bounds, clippy::unimplemented,
  clippy::unnested_or_patterns, clippy::unused_self,
  clippy::useless_transmute,
  clippy::verbose_file_reads,
  clippy::zero_sized_map_values, future_incompatible,
  nonstandard_style, rust_2018_idioms
)]
// END - Embark standard lints v0.5 for Rust 1.55+ // crate-specific exceptions:
#![allow()]

Clippy 配置的相关问题

目前 Clippy 不支持配置文件来配置Lint ，目前 像 Embark 公司有两种解决方法：

  • 将 lint 放到一个统一文件中，然后复制粘贴到使用的地方。
  • 通过 .cargo/config.toml 来配置 rustflags ，参考： lints.toml

Embark 也在跟踪和推动在 Cargo 中支持 Lint 配置的功能，相关 issues：