Introduce skip flag to avoid rerunning successful builds in later stages

travis/build-helper.sh

@@ -33,6 +33,7 @@ run() {
     travis_fold start make
     make -j$N_JOBS
     travis_fold end make
+    touch skip.txt
     ;;
 
   Build2 | Build3 | Build4)
@@ -41,6 +42,7 @@ run() {
     cd build
     make -j$N_JOBS
     travis_fold end make
+    touch skip.txt
     ;;
 
   TestAll)

travis/build.sh

@@ -12,6 +12,17 @@ fi
 
 EXITCODE=42
 
+# Skip this run?
+if [ -f build/skip.txt ]
+then
+  # Remove flag s.t. tests will be executed
+  if [[ "$2" == "Build4" ]]
+  then
+    rm build/skip.txt
+  fi
+  exit 0
+fi
+
 case $OS in
 linux)
     # Execute docker image on Linux

travis/install_linux.sh

@@ -2,4 +2,10 @@
 
 set -e
 
+# Skip this run?
+if [ -f build/skip.txt ]
+then
+  exit 0
+fi
+
 sudo apt-get install -qq -y docker

travis/install_osx.sh

@@ -23,6 +23,12 @@ install_brew_package() {
   fi
 }
 
+# Skip this run?
+if [ -f build/skip.txt ]
+then
+  exit 0
+fi
+
 # Update packages
 travis_fold start brew_update
 brew update