improve git code with devstack functions

if we aren't re-cloning we still need to make sure
we update the branch/tag/commit to the version from the remote

so we need to fetch and then checkout again

it is more complicated.  Dockerfile does a shallow
clone, so we don't get all the remote ref information.

To clone a random remote commit id we have to unshallow

Change-Id: If15f504b6ff2cfdfc8894fd3b37e687a19616714
Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>

1 files changed, 66 insertions, 18 deletions

diff --git a/docker/exec_tests.sh b/docker/exec_tests.sh
index db053f7bc..5f6a945c2 100755
--- a/docker/exec_tests.sh
+++ b/docker/exec_tests.sh
@@ -18,37 +18,85 @@ set -e
 : ${RELENG_REPO_DIR:='/home/opnfv/repos/releng'}
 : ${RELENG_BRANCH:='master'} # branch, tag, sha1 or refspec
 
+# git update using reference as a branch.
+# git_update_branch ref
+function git_update_branch {
+    local git_branch=$1
+
+    git checkout -f origin/${git_branch}
+    # a local branch might not exist
+    git branch -D ${git_branch} || true
+    git checkout -b ${git_branch}
+}
+
+# git update using reference as a branch.
+# git_update_remote_branch ref
+function git_update_remote_branch {
+    local git_branch=$1
+
+    git checkout -b ${git_branch} -t origin/${git_branch}
+}
+
+# git update using reference as a tag. Be careful editing source at that repo
+# as working copy will be in a detached mode
+# git_update_tag ref
+function git_update_tag {
+    local git_tag=$1
+
+    git tag -d ${git_tag}
+    # fetching given tag only
+    git fetch origin tag ${git_tag}
+    git checkout -f ${git_tag}
+}
+
+
+# OpenStack Functions
+
 git_checkout()
 {
-    if git cat-file -e $1^{commit} 2>/dev/null; then
-        # branch, tag or sha1 object
-        git checkout $1 && git pull
-    else
+    local git_ref=$1
+    if [[ -n "$(git show-ref refs/tags/${git_ref})" ]]; then
+        git_update_tag "${git_ref}"
+    elif [[ -n "$(git show-ref refs/heads/${git_ref})" ]]; then
+        git_update_branch "${git_ref}"
+    elif [[ -n "$(git show-ref refs/remotes/origin/${git_ref})" ]]; then
+        git_update_remote_branch "${git_ref}"
+    # check to see if it is a remote ref
+    elif git fetch --tags origin "${git_ref}"; then
         # refspec / changeset
-        git fetch --tags --progress $2 $1
         git checkout FETCH_HEAD
+    else
+        # if we are a random commit id we have to unshallow
+        # to get all the commits
+        git fetch --unshallow origin
+        git checkout -f "${git_ref}"
     fi
 }
 
 echo
-echo "INFO: Updating releng -> $RELENG_BRANCH"
-if [ ! -d $RELENG_REPO_DIR ]; then
-    git clone $RELENG_REPO $RELENG_REPO_DIR
+echo "INFO: Updating releng -> ${RELENG_BRANCH}"
+if [ ! -d ${RELENG_REPO_DIR} ]; then
+    git clone ${RELENG_REPO} ${RELENG_REPO_DIR}
 fi
-cd $RELENG_REPO_DIR
-git checkout master
-git_checkout $RELENG_BRANCH $RELENG_REPO
+cd ${RELENG_REPO_DIR}
+# reset remote so we know origin is valid
+git remote set-url origin ${RELENG_REPO}
+# fetch the exact ref
+git fetch --tags origin ${RELENG_BRANCH} || true
+# purge pyc files
+find . -name '*.pyc' -delete
+git_checkout ${RELENG_BRANCH}
 
 echo
-echo "INFO: Updating yardstick -> $YARDSTICK_BRANCH"
-if [ ! -d $YARDSTICK_REPO_DIR ]; then
-    git clone $YARDSTICK_REPO $YARDSTICK_REPO_DIR
+echo "INFO: Updating yardstick -> ${YARDSTICK_BRANCH}"
+if [ ! -d ${YARDSTICK_REPO_DIR} ]; then
+    git clone ${YARDSTICK_REPO} ${YARDSTICK_REPO_DIR}
 fi
-cd $YARDSTICK_REPO_DIR
-git_checkout $YARDSTICK_BRANCH $YARDSTICK_REPO
+cd ${YARDSTICK_REPO_DIR}
+git_checkout ${YARDSTICK_BRANCH}
 
 # setup the environment
-source $YARDSTICK_REPO_DIR/tests/ci/prepare_env.sh
+source ${YARDSTICK_REPO_DIR}/tests/ci/prepare_env.sh
 
 # execute tests
-$YARDSTICK_REPO_DIR/tests/ci/yardstick-verify $@
+${YARDSTICK_REPO_DIR}/tests/ci/yardstick-verify $@