Use -D warnings instead of deny-warnings feature.

.github/workflows/clippy.yml

@@ -25,6 +25,7 @@ env:
   CARGO_TARGET_DIR: '${{ github.workspace }}/target'
   NO_FMT_TEST: 1
   CARGO_INCREMENTAL: 0
+  RUSTFLAGS: -D warnings
 
 concurrency:
   # For a given workflow, if we push to the same PR, cancel all previous builds on that PR.
@@ -47,25 +48,25 @@ jobs:
 
     # Run
     - name: Build
-      run: cargo build --tests --features deny-warnings,internal
+      run: cargo build --tests --features internal
 
     - name: Test
-      run: cargo test --features deny-warnings,internal
+      run: cargo test --features internal
 
     - name: Test clippy_lints
-      run: cargo test --features deny-warnings,internal
+      run: cargo test --features internal
       working-directory: clippy_lints
 
     - name: Test clippy_utils
-      run: cargo test --features deny-warnings
+      run: cargo test
       working-directory: clippy_utils
 
     - name: Test rustc_tools_util
-      run: cargo test --features deny-warnings
+      run: cargo test
       working-directory: rustc_tools_util
 
     - name: Test clippy_dev
-      run: cargo test --features deny-warnings
+      run: cargo test
       working-directory: clippy_dev
 
     - name: Test clippy-driver

.github/workflows/clippy_bors.yml

@@ -11,6 +11,7 @@ env:
   CARGO_TARGET_DIR: '${{ github.workspace }}/target'
   NO_FMT_TEST: 1
   CARGO_INCREMENTAL: 0
+  RUSTFLAGS: -D warnings
 
 concurrency:
   # For a given workflow, if we push to the same branch, cancel all previous builds on that branch.
@@ -85,34 +86,34 @@ jobs:
 
     # Run
     - name: Build
-      run: cargo build --tests --features deny-warnings,internal
+      run: cargo build --tests --features internal
 
     - name: Test
       if: matrix.host == 'x86_64-unknown-linux-gnu'
-      run: cargo test --features deny-warnings,internal
+      run: cargo test --features internal
 
     - name: Test
       if: matrix.host != 'x86_64-unknown-linux-gnu'
-      run: cargo test --features deny-warnings,internal -- --skip dogfood
+      run: cargo test --features internal -- --skip dogfood
 
     - name: Test clippy_lints
-      run: cargo test --features deny-warnings,internal
+      run: cargo test --features internal
       working-directory: clippy_lints
 
     - name: Test clippy_utils
-      run: cargo test --features deny-warnings
+      run: cargo test
       working-directory: clippy_utils
 
     - name: Test clippy_config
-      run: cargo test --features deny-warnings
+      run: cargo test
       working-directory: clippy_config
 
     - name: Test rustc_tools_util
-      run: cargo test --features deny-warnings
+      run: cargo test
       working-directory: rustc_tools_util
 
     - name: Test clippy_dev
-      run: cargo test --features deny-warnings
+      run: cargo test
       working-directory: clippy_dev
 
     - name: Test clippy-driver

.github/workflows/clippy_dev.yml

@@ -16,6 +16,7 @@ on:
 env:
   RUST_BACKTRACE: 1
   CARGO_INCREMENTAL: 0
+  RUSTFLAGS: -D warnings
 
 jobs:
   clippy_dev:
@@ -28,7 +29,7 @@ jobs:
 
     # Run
     - name: Build
-      run: cargo build --features deny-warnings
+      run: cargo build
       working-directory: clippy_dev
 
     - name: Test update_lints
@@ -38,6 +39,8 @@ jobs:
       run: cargo dev fmt --check
 
     - name: Test cargo dev new lint
+      env:
+        RUSTFLAGS: -A unused-imports
       run: |
         cargo dev new_lint --name new_early_pass --pass early
         cargo dev new_lint --name new_late_pass --pass late

Cargo.toml

@@ -51,7 +51,6 @@ tokio = { version = "1", features = ["io-util"] }
 rustc_tools_util = "0.3.0"
 
 [features]
-deny-warnings = ["clippy_lints/deny-warnings"]
 integration = ["tempfile"]
 internal = ["clippy_lints/internal", "tempfile"]
 

clippy_config/Cargo.toml

@@ -14,9 +14,6 @@ toml = "0.7.3"
 [dev-dependencies]
 walkdir = "2.3"
 
-[features]
-deny-warnings = []
-
 [package.metadata.rust-analyzer]
 # This crate uses #[feature(rustc_private)]
 rustc_private = true

clippy_config/src/lib.rs

@@ -1,5 +1,4 @@
 #![feature(rustc_private, array_windows, let_chains)]
-#![cfg_attr(feature = "deny-warnings", deny(warnings))]
 #![warn(
     trivial_casts,
     trivial_numeric_casts,

clippy_dev/Cargo.toml

@@ -13,9 +13,6 @@ opener = "0.6"
 shell-escape = "0.1"
 walkdir = "2.3"
 
-[features]
-deny-warnings = []
-
 [package.metadata.rust-analyzer]
 # This package uses #[feature(rustc_private)]
 rustc_private = true

clippy_dev/src/lib.rs

@@ -1,6 +1,5 @@
 #![feature(let_chains)]
 #![feature(rustc_private)]
-#![cfg_attr(feature = "deny-warnings", deny(warnings))]
 #![warn(
     trivial_casts,
     trivial_numeric_casts,

clippy_dev/src/main.rs

@@ -1,4 +1,3 @@
-#![cfg_attr(feature = "deny-warnings", deny(warnings))]
 // warn on lints, that are included in `rust-lang/rust`s bootstrap
 #![warn(rust_2018_idioms, unused_lifetimes)]
 

clippy_lints/Cargo.toml

@@ -32,7 +32,6 @@ url = "2.2"
 walkdir = "2.3"
 
 [features]
-deny-warnings = ["clippy_config/deny-warnings", "clippy_utils/deny-warnings"]
 # build clippy with internal lints enabled, off by default
 internal = ["serde_json", "tempfile", "regex"]
 

clippy_lints/src/lib.rs

@@ -14,7 +14,6 @@
 #![feature(stmt_expr_attributes)]
 #![feature(unwrap_infallible)]
 #![recursion_limit = "512"]
-#![cfg_attr(feature = "deny-warnings", deny(warnings))]
 #![allow(
     clippy::missing_docs_in_private_items,
     clippy::must_use_candidate,

clippy_utils/Cargo.toml

@@ -12,9 +12,6 @@ rustc-semver = "1.1"
 # FIXME(f16_f128): remove when no longer needed for parsing
 rustc_apfloat = "0.2.0"
 
-[features]
-deny-warnings = ["clippy_config/deny-warnings"]
-
 [package.metadata.rust-analyzer]
 # This crate uses #[feature(rustc_private)]
 rustc_private = true

clippy_utils/src/lib.rs

@@ -10,7 +10,6 @@
 #![feature(assert_matches)]
 #![feature(unwrap_infallible)]
 #![recursion_limit = "512"]
-#![cfg_attr(feature = "deny-warnings", deny(warnings))]
 #![allow(
     clippy::missing_errors_doc,
     clippy::missing_panics_doc,

declare_clippy_lint/Cargo.toml

@@ -11,6 +11,3 @@ proc-macro = true
 itertools = "0.12"
 quote = "1.0.21"
 syn = "2.0"
-
-[features]
-deny-warnings = []

declare_clippy_lint/src/lib.rs

@@ -1,5 +1,4 @@
 #![feature(let_chains)]
-#![cfg_attr(feature = "deny-warnings", deny(warnings))]
 // warn on lints, that are included in `rust-lang/rust`s bootstrap
 #![warn(rust_2018_idioms, unused_lifetimes)]
 

lintcheck/Cargo.toml

@@ -25,6 +25,3 @@ tar = "0.4"
 toml = "0.7.3"
 ureq = { version = "2.2", features = ["json"] }
 walkdir = "2.3"
-
-[features]
-deny-warnings = []

rustc_tools_util/Cargo.toml

@@ -10,6 +10,3 @@ categories = ["development-tools"]
 edition = "2018"
 
 [dependencies]
-
-[features]
-deny-warnings = []

rustc_tools_util/src/lib.rs

@@ -1,5 +1,3 @@
-#![cfg_attr(feature = "deny-warnings", deny(warnings))]
-
 use std::str;
 
 /// This macro creates the version string during compilation from the

src/driver.rs

@@ -2,7 +2,6 @@
 #![allow(rustc::untranslatable_diagnostic)]
 #![feature(rustc_private)]
 #![feature(let_chains)]
-#![cfg_attr(feature = "deny-warnings", deny(warnings))]
 // warn on lints, that are included in `rust-lang/rust`s bootstrap
 #![warn(rust_2018_idioms, unused_lifetimes)]
 // warn on rustc internal lints

src/main.rs

@@ -1,4 +1,3 @@
-#![cfg_attr(feature = "deny-warnings", deny(warnings))]
 // warn on lints, that are included in `rust-lang/rust`s bootstrap
 #![warn(rust_2018_idioms, unused_lifetimes)]
 

tests/check-fmt.rs

@@ -1,4 +1,3 @@
-#![cfg_attr(feature = "deny-warnings", deny(warnings))]
 #![warn(rust_2018_idioms, unused_lifetimes)]
 
 use std::path::PathBuf;

tests/compile-test.rs

@@ -1,5 +1,4 @@
 #![feature(is_sorted)]
-#![cfg_attr(feature = "deny-warnings", deny(warnings))]
 #![warn(rust_2018_idioms, unused_lifetimes)]
 #![allow(unused_extern_crates)]
 

tests/dogfood.rs

@@ -3,7 +3,6 @@
 //!
 //! See [Eating your own dog food](https://en.wikipedia.org/wiki/Eating_your_own_dog_food) for context
 
-#![cfg_attr(feature = "deny-warnings", deny(warnings))]
 #![warn(rust_2018_idioms, unused_lifetimes)]
 
 use itertools::Itertools;

tests/integration.rs

@@ -8,7 +8,6 @@
 //! Clippy doesn't produce an ICE. Lint warnings are ignored by this test.
 
 #![cfg(feature = "integration")]
-#![cfg_attr(feature = "deny-warnings", deny(warnings))]
 #![warn(rust_2018_idioms, unused_lifetimes)]
 
 use std::env;

tests/lint_message_convention.rs

@@ -1,4 +1,3 @@
-#![cfg_attr(feature = "deny-warnings", deny(warnings))]
 #![warn(rust_2018_idioms, unused_lifetimes)]
 
 use std::ffi::OsStr;

tests/missing-test-files.rs

@@ -1,4 +1,3 @@
-#![cfg_attr(feature = "deny-warnings", deny(warnings))]
 #![warn(rust_2018_idioms, unused_lifetimes)]
 #![allow(clippy::assertions_on_constants)]
 #![feature(path_file_prefix)]

tests/versioncheck.rs

@@ -1,4 +1,3 @@
-#![cfg_attr(feature = "deny-warnings", deny(warnings))]
 #![warn(rust_2018_idioms, unused_lifetimes)]
 #![allow(clippy::single_match_else)]
 

tests/workspace_test/path_dep/Cargo.toml

@@ -1,3 +1,6 @@
 [package]
 name = "path_dep"
 version = "0.1.0"
+
+[features]
+primary_package_test = []