afegir git hooks per format, tidy i cppcheck

.githooks/pre-commit

@@ -0,0 +1,92 @@
+#!/usr/bin/env bash
+# Pre-commit hook: aplica clang-format als fitxers C++ staged abans del commit.
+# - Només toca fitxers staged dins source/ (exclou source/external/).
+# - Avorta el commit si hi ha canvis NO staged en aquests fitxers (per no incloure'ls sense voler).
+
+set -euo pipefail
+
+if ! command -v clang-format >/dev/null 2>&1; then
+    echo "pre-commit: clang-format no trobat — saltant format check" >&2
+    exit 0
+fi
+
+mapfile -t STAGED < <(git diff --cached --name-only --diff-filter=ACMR \
+    | grep -E '^source/.*\.(cpp|hpp|h)$' \
+    | grep -vE '^source/external/' || true)
+
+if [ ${#STAGED[@]} -eq 0 ]; then
+    exit 0
+fi
+
+UNSTAGED_DIRTY=()
+for f in "${STAGED[@]}"; do
+    if ! git diff --quiet -- "$f"; then
+        UNSTAGED_DIRTY+=("$f")
+    fi
+done
+
+if [ ${#UNSTAGED_DIRTY[@]} -gt 0 ]; then
+    echo "pre-commit: aquests fitxers tenen canvis NO staged i estan al commit." >&2
+    echo "            Fes 'git add' o 'git stash' abans de continuar:" >&2
+    printf '  %s\n' "${UNSTAGED_DIRTY[@]}" >&2
+    exit 1
+fi
+
+clang-format -i "${STAGED[@]}"
+git add -- "${STAGED[@]}"
+
+# --- clang-tidy només sobre els fitxers staged ---
+if ! command -v clang-tidy >/dev/null 2>&1; then
+    echo "pre-commit: clang-tidy no trobat — saltant tidy" >&2
+    exit 0
+fi
+
+REPO_ROOT="$(git rev-parse --show-toplevel)"
+BUILD_DIR="$REPO_ROOT/build"
+
+if [ ! -f "$BUILD_DIR/compile_commands.json" ]; then
+    echo "pre-commit: generant compile_commands.json (build dir buit)..." >&2
+    cmake -S "$REPO_ROOT" -B "$BUILD_DIR" >/dev/null
+fi
+
+echo "pre-commit: clang-tidy sobre ${#STAGED[@]} fitxer(s)..." >&2
+if ! clang-tidy -p "$BUILD_DIR" --quiet "${STAGED[@]}"; then
+    echo "pre-commit: clang-tidy ha trobat errors — commit avortat" >&2
+    exit 1
+fi
+
+# --- cppcheck només sobre els .cpp staged ---
+if ! command -v cppcheck >/dev/null 2>&1; then
+    echo "pre-commit: cppcheck no trobat — saltant cppcheck" >&2
+    exit 0
+fi
+
+CPP_STAGED=()
+for f in "${STAGED[@]}"; do
+    [[ "$f" == *.cpp ]] && CPP_STAGED+=("$f")
+done
+
+if [ ${#CPP_STAGED[@]} -eq 0 ]; then
+    exit 0
+fi
+
+echo "pre-commit: cppcheck sobre ${#CPP_STAGED[@]} fitxer(s)..." >&2
+if ! cppcheck \
+        --enable=warning,style,performance,portability \
+        --std=c++20 \
+        --language=c++ \
+        --inline-suppr \
+        --suppress=missingIncludeSystem \
+        --suppress=toomanyconfigs \
+        --suppress='*:*source/external/*' \
+        --suppress='*:*source/core/rendering/sdl3gpu/spv/*' \
+        --suppress=normalCheckLevelMaxBranches \
+        -D_DEBUG \
+        -DLINUX_BUILD \
+        --quiet \
+        --error-exitcode=1 \
+        -I "$REPO_ROOT/source" \
+        "${CPP_STAGED[@]}"; then
+    echo "pre-commit: cppcheck ha trobat errors — commit avortat" >&2
+    exit 1
+fi