tools/clippy: Move allow-list to .cargo/config.toml

This applies the same clippy config to rust_analyzer
as well.

BUG=b:193893457
TEST=./tools/clippy and VSCode show the same linter results

Change-Id: I5deec4a24d71fec4692ed708664130f46c1311b0
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3278773
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Dennis Kempin <denniskempin@google.com>

.cargo/config.toml

@@ -0,0 +1,46 @@
+# Disable clippy lints project-wide.
+# This allows ./tools/clippy and IDE integrations to use the same configuration.
+# This should be replaced with a proper clippy config once available:
+# https://github.com/rust-lang/cargo/issues/5034
+[target.'cfg(all())']
+rustflags = [
+    # TODO(b/181763000): Fail builds on warnings
+    # "-Dwarnings",
+
+    # TODO(crbug/908640): To be resolved.
+    "-Aclippy::collapsible_if", # 4 errors
+    "-Aclippy::comparison_chain", # 1 errors
+    "-Aclippy::missing_safety_doc", # 26 errors
+    "-Aclippy::wrong_self_convention", # 8 errors
+    "-Aclippy::upper_case_acronyms", # 1 errors
+    "-Aclippy::from_over_into", # 1 errors
+    "-Aclippy::let-and-return", # 1 errors
+
+    # False positives affecting WlVfd @ `devices/src/virtio/wl.rs`.
+    # Bug: https://github.com/rust-lang/rust-clippy/issues/6312
+    "-Aclippy::field_reassign_with_default",
+
+    # We don't care about these lints. Okay to remain suppressed globally.
+    "-Aclippy::cast_lossless",
+    "-Aclippy::cognitive_complexity",
+    "-Aclippy::enum_variant_names",
+    "-Aclippy::identity_op",
+    "-Aclippy::len_without_is_empty",
+    "-Aclippy::len_zero",
+    "-Aclippy::match_bool",
+    "-Aclippy::match_wild_err_arm",
+    "-Aclippy::module_inception",
+    "-Aclippy::needless_bool",
+    "-Aclippy::new_without_default",
+    "-Aclippy::or_fun_call",
+    "-Aclippy::should_implement_trait",
+    "-Aclippy::single_char_pattern",
+    "-Aclippy::too_many_arguments",
+    "-Aclippy::trivially_copy_pass_by_ref",
+    "-Aclippy::type_complexity",
+    "-Aclippy::unreadable_literal",
+    "-Aclippy::useless_let_if_seq",
+    "-Aclippy::useless_transmute",
+    "-Aclippy::new-ret-no-self",
+    "-Aclippy::result-unit-err",
+]

tools/clippy

@@ -3,48 +3,15 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+# To check for violations:
+# $ ./tools/clippy
+#
+# To fix violations where possible:
+# $ ./tools/clippy --fix
+
 set -e
 cd "$(dirname $0)/.."
 
-SUPPRESS=(
-    # TODO(crbug/908640): To be resolved.
-    collapsible_if        # 4 errors
-    comparison_chain      # 1 error
-    missing_safety_doc    # 30 errors
-    wrong_self_convention # 8 errors
-    upper_case_acronyms   # 1 errors
-    from_over_into        # 1 error
-    let-and-return        # 1 error
-
-    # False positives affecting WlVfd @ `devices/src/virtio/wl.rs`.
-    # Bug: https://github.com/rust-lang/rust-clippy/issues/6312
-    field_reassign_with_default
-
-    # We don't care about these lints. Okay to remain suppressed globally.
-    cast_lossless
-    cognitive_complexity
-    enum_variant_names
-    identity_op
-    len_without_is_empty
-    len_zero
-    match_bool
-    match_wild_err_arm
-    module_inception
-    needless_bool
-    new_without_default
-    or_fun_call
-    should_implement_trait
-    single_char_pattern
-    too_many_arguments
-    trivially_copy_pass_by_ref
-    type_complexity
-    unreadable_literal
-    useless_let_if_seq
-    useless_transmute
-    new-ret-no-self
-    result-unit-err
-)
-
 # TODO(b/192373803): Clean up clippy error is the following crates
 EXCLUDE=(
     aarch64           # 16 errors
@@ -68,7 +35,6 @@ EXCLUDE=(
     virtio_sys        # 9 errors
     vm_memory         # 9 errors
     x86_64            # 56 errors
-
 )
 
 EXCLUDE_COMMON=(
@@ -79,21 +45,20 @@ EXCLUDE_COMMON=(
     common/sys_util   # 2 errors
 )
 
-CLIPPY_ARGS="-- ${SUPPRESS[@]/#/-Aclippy::}  -D warnings $@"
-
+# Note: Clippy checks are configured in .cargo/config.toml
 echo "Clippy crosvm workspace"
 cargo clippy \
     --workspace \
     --features all-linux \
     --all-targets \
     ${EXCLUDE[@]/#/--exclude } \
-    ${CLIPPY_ARGS}
+    "$@" -- -Dwarnings
 
 for crate in common/*; do
     if [ -d "${crate}" ] &&
         [[ ! " ${EXCLUDE_COMMON[*]} " =~ " ${crate} " ]]; then
         echo ""
         echo "Clippy ${crate}"
-        (cd "${crate}" && cargo clippy --all-targets ${CLIPPY_ARGS})
+        (cd "${crate}" && cargo clippy --all-targets "$@" -- -Dwarnings)
     fi
 done