Add a check to fail the job if compiling takes too long.

The intent behind this is that, if there most likely wouldn't be enough time left to complete the unit tests anyway, then just fail the job after compiling so the cache can be updated.  Otherwise, if the unit tests were run and the job timed out, then the cache would not be uploaded at all and the next time the job ran it would be from scratch again.

(cherry-picked from commit 5d970e40cd)

utils/travis/docker_run.sh

@@ -19,11 +19,12 @@ BOOST_TEST="${11}"
 LTO="${12}"
 SAN="${13}"
 
-# only enable strict builds when no optimizations are done
 if [ "$EXTRA_FLAGS_RELEASE" == "-O0" ]; then
     STRICT="true"
+    build_timeout=35
 else
     STRICT="false"
+    build_timeout=40
 fi
 
 echo "Using configuration:"
@@ -50,6 +51,8 @@ if [ "$NLS" == "true" ]; then
         scons translations build=release --debug=time nls=true jobs=2
     fi
 else
+    build_start=$(date +%s)
+
     if [ "$TOOL" == "cmake" ]; then
         echo "max_size = 200M" > $HOME/.ccache/ccache.conf
         echo "compiler_check = content" >> $HOME/.ccache/ccache.conf
@@ -74,6 +77,12 @@ else
         exit $BUILD_RET
     fi
 
+     build_end=$(date +%s)
+     if (( build_end-build_start > 60*build_timeout )); then
+         echo "Insufficient time remaining to execute unit tests. Exiting now to allow caching to occur. Please restart the job."
+         exit 1
+     fi
+
 # needed since docker returns the exit code of the final command executed, so a failure needs to be returned if any unit tests fail
     EXIT_VAL=0