sync-test-repos.sh: Add Zuul environment support for synchronizing files

We could re-use this script in the OpenStack CI propose job. For this to
happen we need to know if we are running in Zuul, and if we do, then we
need to consult the first argument which is normally the OSA project
we want to synchronize the files to. As such, add a new codepath which
only does a simple copy of files.

Change-Id: I7099fa2418b2633c378c37e83384fc78d7fbe554

sync-test-repos.sh

@@ -40,6 +40,7 @@ usage() {
 
 EOF
 }
+
 exclude_project() {
     excluded_projects+="${1} "
 }
@@ -80,6 +81,16 @@ check_and_ignore() {
     return 1
 }
 
+copy_files() {
+    local osa_project=${1}
+
+    # Copy files
+    for f in ${files_to_sync[@]}; do
+        [[ ! -e ${osa_project}/$f ]] && continue
+        cp $f ${osa_project}/$f
+    done
+}
+
 # Do not change these files unless you know what you are doing
 declare -ra files_to_sync=(run_tests.sh bindep.txt Vagrantfile tests/tests-repo-clone.sh .gitignore)
 declare -r  openstack_git_url="git://git.openstack.org"
@@ -96,11 +107,39 @@ while true; do
         -i|--interactive) interactive=true; shift ;;
         -n|--dry-run) dry_run=true; shift ;;
         --) shift; break ;;
-        -h|--help|*) usage; exit 1 ;;
+        -h|--help) usage; exit 1 ;;
     esac
 done
 
-declare -ra osa_projects=($(./gen-projects-list.sh))
+# Always exclude openstack-ansible-tests repository. This is not
+# necessary because osa_projects should never include "openstack-ansible-tests"
+# but it can serve as an example for users who may add more
+# projects in the future.
+exclude_project "openstack-ansible-tests"
+
+############################# ZUUL SYNCING ###################################
+# If we running in the OpenStack CI then the first argument is going to be the
+# project directory and all we need to do is to simply copy files. The
+# environment is already prepared.
+if env | grep -q ^ZUUL; then
+    # Some debug information.
+    echo "Running in a Zuul environment"
+    echo "Current directory: $(pwd)"
+    echo "OSA project: '${1}'"
+
+    # Do we need to skip that repo?
+    check_and_ignore ${1} && exit 0
+
+    # This should never happen if Zuul is working properly
+    [[ ! -d ${1} ]] && { echo "${1} does not exit! Refusing to proceed"; exit 1; }
+
+    copy_files ${1}
+
+    # Return back to zuul. No furher processing is required.
+    exit 0
+else
+    declare -ra osa_projects=($(./gen-projects-list.sh))
+fi
 
 # Make sure interactive and dry run can't be used together
 ${dry_run} && ${interactive} && \
@@ -120,12 +159,6 @@ mkdir ${tempdir}
 
 pushd ${tempdir} &> /dev/null
 
-# Always exclude openstack-ansible-tests repository. This is not
-# necessary because osa_projects should never include "openstack-ansible-tests"
-# but it can serve as an example for users who may add more
-# projects in the future.
-exclude_project "openstack-ansible-tests"
-
 echo "=> Cloning openstack-ansible-tests repository"
 eval git clone ${openstack_git_url}/openstack/openstack-ansible-tests
 echo -e "\n---------------------------------------------\n"
@@ -154,9 +187,10 @@ for proj in ${osa_projects[@]}; do
     popd &> /dev/null
 
     # Copy files
-    for f in ${files_to_sync[@]}; do
-        cp openstack-ansible-tests/$f ${proj_dir}/$f
-    done
+    pushd openstack-ansible-tests &> /dev/null
+    copy_files ${proj_dir}
+    popd &> /dev/null
+
     process_changes ${proj_dir} ${open_review:="__no_review__"}
     # Clean up the directory
     rm -rf ${proj_dir}