run-make-check.sh: ccache goodness for everyone

Since run-make-check.sh already ensures that ccache is installed,
it makes sense to let everyone benefit from the ccache
tweaks introduced by 4cb5a59

Note 1: The previous solution using "date" would cause build tools to reset
their timestamps after 24 hours, on subsequent runs of run-make-check.sh.
In order to maximize ccache effectiveness, this commit sets SOURCE_DATE_EPOCH
to a fixed value: the number of seconds elapsed since the Unix epoch as at
January 1, 2000 (chosen to commemorate Y2K armageddon).

Note 2: this commit introduces "set -e". This was actually in effect
before, via "source install-deps.sh". Better to make it explicit.

Fixes: http://tracker.ceph.com/issues/24777
Signed-off-by: Nathan Cutler <[email protected]>

run-make-check.sh

@@ -12,9 +12,26 @@
 #  version 2.1 of the License, or (at your option) any later version.
 #
 
-#
-# Return MAX(1, (number of processors / 2)) by default or NPROC
-#
+set -e
+
+trap clean_up_after_myself EXIT
+
+ORIGINAL_CCACHE_CONF="$HOME/.ccache/ccache.conf"
+SAVED_CCACHE_CONF="$HOME/.run-make-check-saved-ccache-conf"
+
+function save_ccache_conf() {
+    test -f $ORIGINAL_CCACHE_CONF && cp $ORIGINAL_CCACHE_CONF $SAVED_CCACHE_CONF || true
+}
+
+function restore_ccache_conf() {
+    test -f $SAVED_CCACHE_CONF && mv $SAVED_CCACHE_CONF $ORIGINAL_CCACHE_CONF || true
+}
+
+function clean_up_after_myself() {
+    rm -fr ${CEPH_BUILD_VIRTUALENV:-/tmp}/*virtualenv*
+    restore_ccache_conf
+}
+
 function get_processors() {
     if test -n "$NPROC" ; then
         echo $NPROC
@@ -60,6 +77,11 @@ function run() {
         echo "This probably means distribution $ID is not supported by run-make-check.sh" >&2
     fi
 
+    if ! type ccache > /dev/null 2>&1 ; then
+        echo "ERROR: ccache could not be installed"
+        exit 1
+    fi
+
     if test -f ./install-deps.sh ; then
 	$DRY_RUN source ./install-deps.sh || return 1
     fi
@@ -76,28 +98,34 @@ function run() {
 
     CMAKE_BUILD_OPTS="-DWITH_FIO=ON -DWITH_GTEST_PARALLEL=ON"
 
-    # Are we in the CI ?
+    cat <<EOM
+Note that the binaries produced by this script do not contain correct time
+and git version information, which may make them unsuitable for debugging
+and production use.
+EOM
+    save_ccache_conf
+    # remove the entropy generated by the date/time embedded in the build
+    CMAKE_BUILD_OPTS="$CMAKE_BUILD_OPTS -D ENABLE_GIT_VERSION=OFF"
+    export SOURCE_DATE_EPOCH="946684800"
+    ccache -o sloppiness=time_macros
+    ccache -o run_second_cpp=true
     if [ -n "$JENKINS_HOME" ]; then
-      echo "Jenkins got detected, let's tune the build"
-      # The following settings are made for improving ccache efficiency
-      # by removing the entropy generated by the date/time embedded in the build
-      CMAKE_BUILD_OPTS="$CMAKE_BUILD_OPTS -D ENABLE_GIT_VERSION=OFF"
-      export SOURCE_DATE_EPOCH=$(date +%D |date -f- +%s)
-      ccache -o sloppiness=time_macros
-      ccache -o run_second_cpp=true
-
-      # Build host has plenty of space available, let's use it to keep
-      # various versions of the built objects. This could increase the cache hit
-      # if the same or similar PRs are running several times
-      ccache -o max_size=100G
-      ccache -z # Reset the ccache statistics
+        # Build host has plenty of space available, let's use it to keep
+        # various versions of the built objects. This could increase the cache hit
+        # if the same or similar PRs are running several times
+        ccache -o max_size=100G
+    else
+        echo "Current ccache max_size setting:"
+        ccache -p | grep max_size
     fi
+    ccache -z # Reset the ccache statistics
+
     $DRY_RUN ./do_cmake.sh $CMAKE_BUILD_OPTS $CMAKE_PYTHON_OPTS $@ || return 1
     $DRY_RUN cd build
     $DRY_RUN make $BUILD_MAKEOPTS tests || return 1
-    if [ -n "$JENKINS_HOME" ]; then
-      ccache -s # print the ccache statistics to evaluate the efficiency
-    fi
+
+    ccache -s # print the ccache statistics to evaluate the efficiency
+
     # prevent OSD EMFILE death on tests, make sure large than 1024
     $DRY_RUN ulimit -n $(ulimit -Hn)
     if [ $(ulimit -n) -lt 1024 ];then
@@ -124,14 +152,7 @@ function main() {
         echo "Please fix 'hostname --fqdn', otherwise 'make check' will fail"
         return 1
     fi
-    if run "$@" ; then
-        rm -fr ${CEPH_BUILD_VIRTUALENV:-/tmp}/*virtualenv*
-        echo "cmake check: successful run on $(git rev-parse HEAD)"
-        return 0
-    else
-        rm -fr ${CEPH_BUILD_VIRTUALENV:-/tmp}/*virtualenv*
-        return 1
-    fi
+    run "$@" && echo "make check: successful run on $(git rev-parse HEAD)"
 }
 
 main "$@"