Add cmake-format to precommit hook (#1215)

Fixes #1067.

.githooks/pre-commit

@@ -1,7 +1,5 @@
 #!/bin/bash
 
-exec 1>&2
-
 # paths to check and re-format
 sources="src unittests"
 formatter="clang-format -i"
@@ -37,6 +35,19 @@ EOF
     exit 2
 fi
 
+if ! command -v cmake-format &> /dev/null; then
+    cat <<EOF
+
+                                    ERROR
+-----------------------------------------------------------------------------
+        `cmake-format` is required to run this script.
+        Please install it and run again.
+-----------------------------------------------------------------------------
+
+EOF
+    exit 3
+fi
+
 function grep_code {
     grep -l "${1}" ${sources} -r --include \*.hpp --include \*.cpp
 }
@@ -57,9 +68,14 @@ else
     grep_code "#include <\($main_src_dirs\)/.*>" | xargs sed -i -E "s|#include <(($main_src_dirs)/.*)>|#include \"\1\"|g"
 fi
 
-first=$(git diff $sources)
+cmake_dirs=$(echo CMake $sources)
+cmake_files=$(find $cmake_dirs -type f \( -name "CMakeLists.txt" -o -name "*.cmake" \))
+cmake_files=$(echo $cmake_files ./CMakeLists.txt)
+
+first=$(git diff $sources $cmake_files)
 find $sources -type f \( -name '*.cpp' -o -name '*.hpp' -o -name '*.ipp' \) -print0 | xargs -0 $formatter
-second=$(git diff $sources)
+cmake-format -i $cmake_files
+second=$(git diff $sources $cmake_files)
 changes=$(diff <(echo "$first") <(echo "$second") | wc -l | sed -e 's/^[[:space:]]*//')
 
 if [ "$changes" != "0" ]; then