Introduce basic linting infrastructure

.clang-format

@@ -0,0 +1,241 @@
+---
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+AccessModifierOffset: -2
+AlignAfterOpenBracket: Align
+AlignArrayOfStructures: None
+AlignConsecutiveAssignments:
+  Enabled:         true
+  AcrossEmptyLines: false
+  AcrossComments:  false
+  AlignCompound:   false
+  PadOperators:    true
+AlignConsecutiveBitFields:
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+  AcrossEmptyLines: false
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+  Enabled:         true
+  AcrossEmptyLines: false
+  AcrossComments:  false
+  AlignCompound:   false
+  PadOperators:    true
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+  Enabled:         false
+  AcrossEmptyLines: false
+  AcrossComments:  false
+  AlignCompound:   false
+  PadOperators:    false
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+  Enabled:         false
+  AcrossEmptyLines: false
+  AcrossComments:  false
+  AlignCaseColons: false
+AlignEscapedNewlines: Left
+AlignOperands:   Align
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+  Kind:            Always
+  OverEmptyLines:  0
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+AllowAllParametersOfDeclarationOnNextLine: true
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+AllowShortEnumsOnASingleLine: true
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+AllowShortIfStatementsOnASingleLine: Never
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+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: false
+AlwaysBreakTemplateDeclarations: Yes
+AttributeMacros:
+  - __capability
+BinPackArguments: false
+BinPackParameters: false
+BitFieldColonSpacing: Both
+BraceWrapping:
+  AfterCaseLabel:  false
+  AfterClass:      false
+  AfterControlStatement: Never
+  AfterEnum:       false
+  AfterExternBlock: false
+  AfterFunction:   false
+  AfterNamespace:  false
+  AfterObjCDeclaration: false
+  AfterStruct:     false
+  AfterUnion:      false
+  BeforeCatch:     false
+  BeforeElse:      false
+  BeforeLambdaBody: false
+  BeforeWhile:     false
+  IndentBraces:    false
+  SplitEmptyFunction: true
+  SplitEmptyRecord: true
+  SplitEmptyNamespace: true
+BreakAfterAttributes: Never
+BreakAfterJavaFieldAnnotations: false
+BreakArrays:     true
+BreakBeforeBinaryOperators: None
+BreakBeforeConceptDeclarations: Always
+BreakBeforeBraces: Custom
+BreakBeforeInlineASMColon: OnlyMultiline
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializers: BeforeColon
+BreakInheritanceList: BeforeColon
+BreakStringLiterals: true
+ColumnLimit:     119
+CommentPragmas:  '^ IWYU pragma:'
+CompactNamespaces: false
+ConstructorInitializerIndentWidth: 4
+ContinuationIndentWidth: 4
+Cpp11BracedListStyle: true
+DerivePointerAlignment: false
+DisableFormat:   false
+EmptyLineAfterAccessModifier: Never
+EmptyLineBeforeAccessModifier: LogicalBlock
+ExperimentalAutoDetectBinPacking: false
+FixNamespaceComments: true
+ForEachMacros:
+  - foreach
+  - Q_FOREACH
+  - BOOST_FOREACH
+IfMacros:
+  - KJ_IF_MAYBE
+IncludeBlocks:   Preserve
+IncludeCategories:
+  - Regex:           '^"(llvm|llvm-c|clang|clang-c)/'
+    Priority:        2
+    SortPriority:    0
+    CaseSensitive:   false
+  - Regex:           '^(<|"(gtest|isl|json)/)'
+    Priority:        3
+    SortPriority:    0
+    CaseSensitive:   false
+  - Regex:           '.*'
+    Priority:        1
+    SortPriority:    0
+    CaseSensitive:   false
+IncludeIsMainRegex: '$'
+IncludeIsMainSourceRegex: ''
+IndentAccessModifiers: false
+IndentCaseBlocks: false
+IndentCaseLabels: false
+IndentExternBlock: AfterExternBlock
+IndentGotoLabels: true
+IndentPPDirectives: None
+IndentRequiresClause: true
+IndentWidth:     4
+IndentWrappedFunctionNames: false
+InsertBraces:    false
+InsertNewlineAtEOF: false
+InsertTrailingCommas: None
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+JavaScriptWrapImports: true
+KeepEmptyLinesAtTheStartOfBlocks: true
+KeepEmptyLinesAtEOF: false
+LambdaBodyIndentation: Signature
+LineEnding:      DeriveLF
+MacroBlockBegin: ''
+MacroBlockEnd:   ''
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: None
+ObjCBinPackProtocolList: Auto
+ObjCBlockIndentWidth: 4
+ObjCBreakBeforeNestedBlockParam: true
+ObjCSpaceAfterProperty: false
+ObjCSpaceBeforeProtocolList: true
+PackConstructorInitializers: NextLine
+PenaltyBreakAssignment: 2
+PenaltyBreakBeforeFirstCallParameter: 19
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+PenaltyIndentedWhitespace: 0
+PenaltyReturnTypeOnItsOwnLine: 60
+PointerAlignment: Left
+PPIndentWidth:   -1
+QualifierAlignment: Custom
+QualifierOrder:
+  - inline
+  - static
+  - constexpr
+  - const
+  - volatile
+  - type
+ReferenceAlignment: Pointer
+ReflowComments:  true
+RemoveBracesLLVM: false
+RemoveParentheses: Leave
+RemoveSemicolon: false
+RequiresClausePosition: OwnLine
+RequiresExpressionIndentation: OuterScope
+SeparateDefinitionBlocks: Leave
+ShortNamespaceLines: 1
+SortIncludes:    Never
+SortJavaStaticImport: Before
+SortUsingDeclarations: LexicographicNumeric
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+SpaceAfterLogicalNot: false
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+SpaceBeforeCaseColon: false
+SpaceBeforeCpp11BracedList: false
+SpaceBeforeCtorInitializerColon: true
+SpaceBeforeInheritanceColon: true
+SpaceBeforeJsonColon: false
+SpaceBeforeParens: ControlStatements
+SpaceBeforeParensOptions:
+  AfterControlStatements: true
+  AfterForeachMacros: true
+  AfterFunctionDefinitionName: false
+  AfterFunctionDeclarationName: false
+  AfterIfMacros:   true
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+  AfterRequiresInClause: false
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+SpaceInEmptyBlock: false
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+  Maximum:         -1
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+  InCStyleCasts:   false
+  InConditionalStatements: false
+  InEmptyParentheses: false
+  Other:           false
+SpacesInSquareBrackets: false
+Standard:        Auto
+StatementAttributeLikeMacros:
+  - Q_EMIT
+StatementMacros:
+  - Q_UNUSED
+  - QT_REQUIRE_VERSION
+TabWidth:        8
+UseTab:          Never
+VerilogBreakBetweenInstancePorts: true
+WhitespaceSensitiveMacros:
+  - STRINGIZE
+  - PP_STRINGIZE
+  - BOOST_PP_STRINGIZE
+  - NS_SWIFT_NAME
+  - CF_SWIFT_NAME
+...

.github/CODEOWNERS

@@ -1,4 +1,4 @@
 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 # Codeowners for reviews on PRs
 
-*  @bretbrownjr @camio @dietmarkuehl @neatudarius @steve-downey 
+*  @bretbrownjr @camio @dietmarkuehl @neatudarius @steve-downey

.github/workflows/pre-commit.yml

@@ -0,0 +1,13 @@
+name: Lint Check (pre-commit)
+
+on:
+  pull_request:
+  push:
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+      - uses: pre-commit/[email protected]

.pre-commit-config.yaml

@@ -0,0 +1,35 @@
+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.2.0
+    hooks:
+    -   id: trailing-whitespace
+    -   id: end-of-file-fixer
+    -   id: check-yaml
+    -   id: check-added-large-files
+
+  - repo: local
+    hooks:
+      - id: clang-format-fix
+        name: clang-format-fix
+        entry: clang-format-18
+        files: ^(src/|include/)
+        types_or: [c++, c]
+        language: system
+        args: ['-i']
+        stages: [manual]
+
+  - repo: https://github.com/pocc/pre-commit-hooks
+    rev: v1.3.5
+    hooks:
+      - id: clang-format
+        additional_dependencies: ['clang-format==18.1.8']
+      - id: clang-tidy
+        stages: [manual]
+        additional_dependencies: ['clang-tidy==18.1.8']
+
+  - repo: https://github.com/BlankSpruce/gersemi
+    rev: 0.15.1
+    hooks:
+    - id: gersemi

CMakeLists.txt

@@ -3,29 +3,34 @@
 cmake_minimum_required(VERSION 3.25)
 
 project(
-  beman.exemplar # CMake Project Name, which is also the name of the top-level
-                 # targets (e.g., library, executable, etc.).
-  DESCRIPTION "A Beman library exemplar"
-  LANGUAGES CXX)
+    beman.exemplar # CMake Project Name, which is also the name of the top-level
+    # targets (e.g., library, executable, etc.).
+    DESCRIPTION "A Beman library exemplar"
+    LANGUAGES CXX
+)
 
 include(CTest)
 include(FetchContent)
 
 if(BUILD_TESTING)
-  enable_testing()
-
-  block()
-    # Disable installing google test dependency on cmake --install
-    set(INSTALL_GTEST OFF)
-
-    # Fetch GoogleTest
-    FetchContent_Declare(
-      googletest
-      GIT_REPOSITORY https://github.com/google/googletest.git
-      GIT_TAG f8d7d77c06936315286eb55f8de22cd23c188571 # release-1.14.0
-      EXCLUDE_FROM_ALL CMAKE_ARGS -DBUILD_TESTING=OFF)
-    FetchContent_MakeAvailable(googletest)
-  endblock()
+    enable_testing()
+
+    block()
+        # Disable installing google test dependency on cmake --install
+        set(INSTALL_GTEST OFF)
+
+        # Fetch GoogleTest
+        FetchContent_Declare(
+            googletest
+            GIT_REPOSITORY https://github.com/google/googletest.git
+            GIT_TAG
+                f8d7d77c06936315286eb55f8de22cd23c188571 # release-1.14.0
+            EXCLUDE_FROM_ALL
+            CMAKE_ARGS
+            -DBUILD_TESTING=OFF
+        )
+        FetchContent_MakeAvailable(googletest)
+    endblock()
 endif()
 
 add_subdirectory(src/beman/exemplar)

README.md

@@ -21,7 +21,7 @@ Implements: `std::identity` proposed in [Standard Library Concepts (P0898R3)](ht
 
 
 ```cpp
-#include <beman/exemplar/identity.hpp> 
+#include <beman/exemplar/identity.hpp>
 
 namespace exe = beman::exemplar;
 

examples/CMakeLists.txt

@@ -1,11 +1,11 @@
 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-set(ALL_EXAMPLES
-  #identity_as_default_projection
-identity_direct_usage)
+set(ALL_EXAMPLES # identity_as_default_projection
+    identity_direct_usage
+)
 
 foreach(example ${ALL_EXAMPLES})
-  add_executable(beman.exemplar.examples.${example})
-  target_sources(beman.exemplar.examples.${example} PRIVATE ${example}.cpp)
-  target_link_libraries(beman.exemplar.examples.${example} beman::exemplar)
+    add_executable(beman.exemplar.examples.${example})
+    target_sources(beman.exemplar.examples.${example} PRIVATE ${example}.cpp)
+    target_link_libraries(beman.exemplar.examples.${example} beman::exemplar)
 endforeach()