Add git hooks, GitHub action and pre-commit hook for clang-format

.clang-format

@@ -1,10 +1,13 @@
 BasedOnStyle:  LLVM
+AccessModifierOffset: -4
 AlignAfterOpenBracket: DontAlign
 # AlignConsecutiveAssignments: false
+AlignConsecutiveBitFields: true
 # AlignConsecutiveDeclarations: false
+AlignConsecutiveMacros: true
 # AlignEscapedNewlines: Right
 # AlignOperands:   true
-AlignTrailingComments: false
+AlignTrailingComments: true
 AllowAllParametersOfDeclarationOnNextLine: false
 # AllowShortBlocksOnASingleLine: false
 # AllowShortCaseLabelsOnASingleLine: false
@@ -96,11 +99,12 @@ KeepEmptyLinesAtTheStartOfBlocks: false
 # SpaceBeforeAssignmentOperators: true
 # SpaceBeforeParens: ControlStatements
 # SpaceInEmptyParentheses: false
-# SpacesBeforeTrailingComments: 1
+SpacesBeforeTrailingComments: 1
 # SpacesInAngles:  false
 # SpacesInContainerLiterals: true
 # SpacesInCStyleCastParentheses: false
 # SpacesInParentheses: false
 # SpacesInSquareBrackets: false
 TabWidth:        4
+UseCRLF:         true
 UseTab:          Always

.github/workflows/clang-format.yml

@@ -0,0 +1,13 @@
+name: Code formatting check
+on: [push, pull_request]
+jobs:
+  formatting-check:
+    name: Formatting Check
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Run clang-format style check for C/C++.
+      uses: jidicula/clang-format-action@v3.2.0
+      with:
+        clang-format-version: '11'
+        check-path: 'source'

CMakeLists.txt

@@ -307,3 +307,14 @@ install(FILES README.md	DESTINATION ${INSTALL_ROOT} COMPONENT runtime)
 
 # # Install runtime data
 # install(DIRECTORY ${PROJECT_SOURCE_DIR}/data DESTINATION ${INSTALL_DATA} COMPONENT runtime)
+
+
+#
+# Install githooks directory
+#
+
+message("Installing git hooks at ${CMAKE_CURRENT_SOURCE_DIR} with `git config --local core.hooksPath githooks`")
+execute_process(
+    COMMAND git config --local core.hooksPath githooks
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+)

cmake/ClangDevTools.cmake

@@ -2,7 +2,7 @@
 # Variables of interest on this file: ${CLANG_FORMAT_VERSION} and ${CLANG_FORMAT_EXECUTABLE}
 
 # Get only C/C++ files for now
-file(GLOB_RECURSE ALL_SOURCE_FILES *.cpp *.hpp *.h *.c)
+file(GLOB_RECURSE ALL_SOURCE_FILES *.cpp *.hpp *.h *.c *.cc *.hh *.cxx)
 
 # clang-tidy not implemented yet
 #add_custom_target(

cmake/FindClangFormat.cmake

@@ -22,13 +22,11 @@
 # ${CLANG_FORMAT_VERSION}") endif()
 
 find_program(CLANG_FORMAT_EXECUTABLE
-             NAMES clang-format
-                   clang-format-7
-                   clang-format-8
-                   clang-format-9
+             NAMES clang-format-11
+                   clang-format
                    clang-format-10
-                   clang-format-11
                    clang-format-12
+                   clang-format-9
              DOC "clang-format executable")
 mark_as_advanced(CLANG_FORMAT_EXECUTABLE)
 

githooks/canonicalize_filename.sh

@@ -0,0 +1,48 @@
+#!/bin/sh
+
+# Provide the canonicalize filename (physical filename with out any symlinks)
+# like the GNU version readlink with the -f option regardless of the version of
+# readlink (GNU or BSD).
+
+# This file is part of a set of unofficial pre-commit hooks available
+# at github.
+# Link:    https://github.com/githubbrowser/Pre-commit-hooks
+# Contact: David Martin, david.martin.mailbox@googlemail.com
+
+###########################################################
+# There should be no need to change anything below this line.
+
+# Canonicalize by recursively following every symlink in every component of the
+# specified filename.  This should reproduce the results of the GNU version of
+# readlink with the -f option.
+#
+# Reference: http://stackoverflow.com/questions/1055671/how-can-i-get-the-behavior-of-gnus-readlink-f-on-a-mac
+canonicalize_filename () {
+    local target_file="$1"
+    local physical_directory=""
+    local result=""
+
+    # Need to restore the working directory after work.
+    local working_dir="`pwd`"
+
+    cd -- "$(dirname -- "$target_file")"
+    target_file="$(basename -- "$target_file")"
+
+    # Iterate down a (possible) chain of symlinks
+    while [ -L "$target_file" ]
+    do
+        target_file="$(readlink -- "$target_file")"
+        cd -- "$(dirname -- "$target_file")"
+        target_file="$(basename -- "$target_file")"
+    done
+
+    # Compute the canonicalized name by finding the physical path
+    # for the directory we're in and appending the target file.
+    physical_directory="`pwd -P`"
+    result="$physical_directory/$target_file"
+
+    # restore the working directory after work.
+    cd -- "$working_dir"
+
+    echo "$result"
+}

githooks/pre-commit

@@ -0,0 +1,50 @@
+#!/bin/sh
+# Git pre-commit hook that runs multiple hooks specified in $HOOKS.
+# Make sure this script is executable. Bypass hooks with git commit --no-verify.
+
+# This file is part of a set of unofficial pre-commit hooks available
+# at github.
+# Link:    https://github.com/githubbrowser/Pre-commit-hooks
+# Contact: David Martin, david.martin.mailbox@googlemail.com
+
+
+###########################################################
+# CONFIGURATION:
+# pre-commit hooks to be executed. They should be in the same .git/hooks/ folder
+# as this script. Hooks should return 0 if successful and nonzero to cancel the
+# commit. They are executed in the order in which they are listed.
+#HOOKS="pre-commit-compile pre-commit-uncrustify"
+HOOKS="pre-commit-clang-format"
+###########################################################
+# There should be no need to change anything below this line.
+
+. "$(dirname -- "$0")/canonicalize_filename.sh"
+
+# exit on error
+set -e
+
+# Absolute path to this script, e.g. /home/user/bin/foo.sh
+SCRIPT="$(canonicalize_filename "$0")"
+
+# Absolute path this script is in, thus /home/user/bin
+SCRIPTPATH="$(dirname -- "$SCRIPT")"
+
+
+for hook in $HOOKS
+do
+    echo "Running hook: $hook"
+    # run hook if it exists
+    # if it returns with nonzero exit with 1 and thus abort the commit
+    if [ -f "$SCRIPTPATH/$hook" ]; then
+        "$SCRIPTPATH/$hook"
+        if [ $? != 0 ]; then
+            exit 1
+        fi
+    else
+        echo "Error: file $hook not found."
+        echo "Aborting commit. Make sure the hook is in $SCRIPTPATH and executable."
+        echo "You can disable it by removing it from the list in $SCRIPT."
+        echo "You can skip all pre-commit hooks with --no-verify (not recommended)."
+        exit 1
+    fi
+done