# Library of functions shared by all CI scripts
+skip_branch_tip_with_tag () {
+ # Sometimes, a branch is pushed at the same time the tag that points
+ # at the same commit as the tip of the branch is pushed, and building
+ # both at the same time is a waste.
+ #
+ # Travis gives a tagname e.g. v2.14.0 in $TRAVIS_BRANCH when
+ # the build is triggered by a push to a tag. Let's see if
+ # $TRAVIS_BRANCH is exactly at a tag, and if so, if it is
+ # different from $TRAVIS_BRANCH. That way, we can tell if
+ # we are building the tip of a branch that is tagged and
+ # we can skip the build because we won't be skipping a build
+ # of a tag.
+
+ if TAG=$(git describe --exact-match "$TRAVIS_BRANCH" 2>/dev/null) &&
+ test "$TAG" != "$TRAVIS_BRANCH"
+ then
+ echo "Tip of $TRAVIS_BRANCH is exactly at $TAG"
+ exit 0
+ fi
+}
+
# Set 'exit on error' for all CI scripts to let the caller know that
-# something went wrong
-set -e
+# something went wrong.
+# Set tracing executed commands, primarily setting environment variables
+# and installing dependencies.
+set -ex
+
+skip_branch_tip_with_tag
+
+if test -z "$jobname"
+then
+ jobname="$TRAVIS_OS_NAME-$CC"
+fi
+
+export DEVELOPER=1
+export DEFAULT_TEST_TARGET=prove
+export GIT_PROVE_OPTS="--timer --jobs 3 --state=failed,slow,save"
+export GIT_TEST_OPTS="--verbose-log"
+export GIT_TEST_CLONE_2GB=YesPlease
+
+case "$jobname" in
+linux-clang|linux-gcc)
+ export GIT_TEST_HTTPD=YesPlease
+
+ # The Linux build installs the defined dependency versions below.
+ # The OS X build installs the latest available versions. Keep that
+ # in mind when you encounter a broken OS X build!
+ export LINUX_P4_VERSION="16.2"
+ export LINUX_GIT_LFS_VERSION="1.5.2"
+
+ P4_PATH="$(pwd)/custom/p4"
+ GIT_LFS_PATH="$(pwd)/custom/git-lfs"
+ export PATH="$GIT_LFS_PATH:$P4_PATH:$PATH"
+ ;;
+osx-clang|osx-gcc)
+ # t9810 occasionally fails on Travis CI OS X
+ # t9816 occasionally fails with "TAP out of sequence errors" on
+ # Travis CI OS X
+ export GIT_SKIP_TESTS="t9810 t9816"
+ ;;
+GETTEXT_POISON)
+ export GETTEXT_POISON=YesPlease
+ ;;
+esac