Add -Werror=format-security and show make distcheck failed with color

Author: yetist

.travis.yml

@@ -129,12 +129,12 @@ requires:
     - yelp-tools
 
 variables:
-  - CFLAGS="-Wall"
+  - CFLAGS="-Wall -Werror=format-security"
 
 before_scripts:
   # These scripts should keep silent.
   - cd ${START_DIR}
-  - "[ -f mate-desktop-1.21.2.tar.xz ] || curl -Ls -o mate-desktop-1.21.2.tar.xz http://pub.mate-desktop.org/releases/1.21/mate-desktop-1.21.2.tar.xz"
+  - '[ -f mate-desktop-1.21.2.tar.xz ] || curl -Ls -o mate-desktop-1.21.2.tar.xz http://pub.mate-desktop.org/releases/1.21/mate-desktop-1.21.2.tar.xz'
   - tar xf mate-desktop-1.21.2.tar.xz
   - cd mate-desktop-1.21.2
   - if [ ${DISTRO_NAME} == "debian" -o ${DISTRO_NAME} == "ubuntu" ];then ./configure --prefix=/usr --libdir=/usr/lib/x86_64-linux-gnu --libexecdir=/usr/lib/x86_64-linux-gnu  >/dev/null 2>&1; else ./configure --prefix=/usr  >/dev/null 2>&1; fi
@@ -150,13 +150,14 @@ before_scripts:
   - make install > /dev/null 2>&1
 
   - cd ${START_DIR}
-  - "[ -f mate-settings-daemon-1.21.2.tar.xz ] || curl -Ls -o mate-settings-daemon-1.21.2.tar.xz http://pub.mate-desktop.org/releases/1.21/mate-settings-daemon-1.21.2.tar.xz"
+  - '[ -f mate-settings-daemon-1.21.2.tar.xz ] || curl -Ls -o mate-settings-daemon-1.21.2.tar.xz http://pub.mate-desktop.org/releases/1.21/mate-settings-daemon-1.21.2.tar.xz'
   - tar xf mate-settings-daemon-1.21.2.tar.xz
   - cd mate-settings-daemon-1.21.2
   - if [ ${DISTRO_NAME} == "debian" -o ${DISTRO_NAME} == "ubuntu" ];then ./configure --prefix=/usr --libdir=/usr/lib/x86_64-linux-gnu --libexecdir=/usr/lib/x86_64-linux-gnu  >/dev/null 2>&1; else ./configure --prefix=/usr  >/dev/null 2>&1; fi
   - make > /dev/null 2>&1
   - make install > /dev/null 2>&1
 
 after_scripts:
-  # Just look at the error output and return 0 if it fails.
-  - make distcheck || true > /dev/null
+  - make distcheck > /dev/null
+    # Just look at the error output and return 0 always.
+  - 'if [ $? -ne 0 ];then RED="\033[0;31m"; NC="\033[0m"; printf "${RED}!!! ERROR: Run make distcheck failed.${NC}\n"; fi'