Add clang-format to build

.clang-format

@@ -0,0 +1,65 @@
+# Generated from CLion C/C++ Code Style settings
+BasedOnStyle: LLVM
+AccessModifierOffset: -4
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments: None
+AlignConsecutiveMacros: true
+AlignOperands: Align
+AllowAllArgumentsOnNextLine: false
+AllowAllConstructorInitializersOnNextLine: false
+AllowAllParametersOfDeclarationOnNextLine: false
+AllowShortBlocksOnASingleLine: Always
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: None
+AllowShortIfStatementsOnASingleLine: Always
+AllowShortLambdasOnASingleLine: All
+AllowShortLoopsOnASingleLine: true
+BreakAfterReturnType: None
+BreakTemplateDeclarations: Yes
+BreakBeforeBraces: Custom
+BraceWrapping:
+  AfterCaseLabel: false
+  AfterClass: false
+  AfterControlStatement: Never
+  AfterEnum: false
+  AfterFunction: false
+  AfterNamespace: false
+  AfterUnion: false
+  BeforeCatch: false
+  BeforeElse: false
+  IndentBraces: false
+  SplitEmptyFunction: false
+  SplitEmptyRecord: true
+BreakBeforeBinaryOperators: None
+BreakBeforeTernaryOperators: false
+BreakConstructorInitializers: BeforeColon
+BreakInheritanceList: BeforeColon
+ColumnLimit: 0
+CompactNamespaces: false
+ContinuationIndentWidth: 8
+IndentCaseLabels: true
+IndentPPDirectives: AfterHash
+IndentWidth: 4
+KeepEmptyLinesAtTheStartOfBlocks: true
+MaxEmptyLinesToKeep: 2
+NamespaceIndentation: All
+PointerAlignment: Right
+ReflowComments: false
+SpaceAfterCStyleCast: true
+SpaceAfterLogicalNot: false
+SpaceAfterTemplateKeyword: false
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeCpp11BracedList: true
+SpaceBeforeCtorInitializerColon: true
+SpaceBeforeInheritanceColon: true
+SpaceBeforeParens: ControlStatements
+SpaceBeforeRangeBasedForLoopColon: false
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 0
+SpacesInAngles: false
+SpacesInCStyleCastParentheses: false
+SpacesInContainerLiterals: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+TabWidth: 4
+UseTab: Never

.github/workflows/style.yml

@@ -6,8 +6,11 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    continue-on-error: true
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
       - name: Check simple style
         run: ./tools/simple-style.sh
+      - name: Clang format
+        run: ./tools/clang-format.sh --dry-run --Werror

tools/clang-format.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+if ! command -v "${CLANG_FORMAT}" &>/dev/null; then
+  CLANG_FORMAT=clang-format-19
+fi
+
+if ! command -v "${CLANG_FORMAT}" &>/dev/null; then
+  CLANG_FORMAT=clang-format-18
+fi
+
+if ! command -v "${CLANG_FORMAT}" &>/dev/null; then
+  CLANG_FORMAT=clang-format
+fi
+
+find kernel/src/ \( -iname '*.h' -o -iname '*.c' \) -print0 | xargs -0 "${CLANG_FORMAT}" "$@" -i