travis.yml: Add cppcheck - A tool for static C/C++ code analysis.

.travis.yml

@@ -10,6 +10,16 @@ matrix:
         apt:
           sources:
             - ubuntu-toolchain-r-test
+      env:
+        - MATRIX_EVAL="CC=gcc && CXX=g++"
+        - STATIC_ANALYSIS="yes"
+      fail_fast: true
+
+    - os: linux
+      addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
           packages:
             - g++-4.9
       env:
@@ -47,10 +57,15 @@ matrix:
 
 before_install:
   - sudo apt-get update -qq
+  # cppcheck tool
+  - sudo apt-get install -y cppcheck/trusty-backports
   # imake
   - sudo apt-get install -y xutils-dev
   # X11 libaries
   - sudo apt-get install -y libxcomposite-dev libxfont-dev libxinerama-dev libxrandr-dev libxtst-dev x11proto-fonts-dev
   - eval "${MATRIX_EVAL}"
 script:
+   # run static analysis tools
+   - ./run-static-analysis.sh
+   # build all packages
    - make

run-static-analysis.sh

+#!/bin/bash
+
+if [[ "${STATIC_ANALYSIS}" == "yes" ]]; then
+    # cppcheck
+    if ! [ -x "$(command -v cppcheck)" ]; then
+        echo 'Error: cppcheck is not installed.' >&2
+        exit 1
+    fi
+    CPPCHECK_OPTS='--error-exitcode=0 --force --quiet'
+    # we exclude some external projects
+    CPPCHECK_EXCLUDES='-i ./nx-X11/extras/Mesa* -i ./nx-X11/extras/Mesa_* -i nx-X11/programs/Xserver/GL/mesa*'
+    echo "$(cppcheck --version):";
+    cppcheck $CPPCHECK_OPTS $CPPCHECK_EXCLUDES .;
+fi