Added gerrit-git-prep to sahara-ci repo

This script was deleted from project-config because of migration
to zuul3 we need to store it locally.

Change-Id: I4efb0622c8d3ca2dbfc79e1a1dc25e9fbe9be610

config/nodepool/scripts/gerrit-git-prep.sh

@@ -0,0 +1,112 @@
+#!/bin/bash -e
+
+GERRIT_SITE=$1
+GIT_ORIGIN=$2
+
+# git can sometimes get itself infinitely stuck with transient network
+# errors or other issues with the remote end.  This wraps git in a
+# timeout/retry loop and is intended to watch over non-local git
+# processes that might hang.  GIT_TIMEOUT, if set, is passed directly
+# to timeout(1); otherwise the default value of 0 maintains the status
+# quo of waiting forever.
+# usage: git_timed <git-command>
+function git_timed {
+    local count=0
+    local timeout=0
+
+    if [[ -n "${GIT_TIMEOUT}" ]]; then
+        timeout=${GIT_TIMEOUT}
+    fi
+
+    until timeout -s SIGINT ${timeout} git "$@"; do
+        echo "Command exited with '$?' [git $*] ... retrying"
+        count=$((count + 1))
+        echo "timeout ${count} for git call: [git $*]"
+        if [ $count -eq 3 ]; then
+            echo $LINENO "Maximum of 3 git retries reached"
+            exit 1
+        fi
+        sleep 5
+    done
+}
+
+if [ -z "$GERRIT_SITE" ]; then
+    echo "The gerrit site name (eg 'https://review.openstack.org') must be the first argument."
+    exit 1
+fi
+
+if [ -z "$ZUUL_URL" ]; then
+    echo "The ZUUL_URL must be provided."
+    exit 1
+fi
+
+if [ -z "$GIT_ORIGIN" ] || [ -n "$ZUUL_NEWREV" ]; then
+    GIT_ORIGIN="$GERRIT_SITE/p"
+    # git://git.openstack.org/
+    # https://review.openstack.org/p
+fi
+
+if [ -z "$ZUUL_REF" ]; then
+    if [ -n "$BRANCH" ]; then
+        echo "No ZUUL_REF so using requested branch $BRANCH from origin."
+        ZUUL_REF=$BRANCH
+        # use the origin since zuul mergers have outdated branches
+        ZUUL_URL=$GIT_ORIGIN
+    else
+        echo "Provide either ZUUL_REF or BRANCH in the calling environment."
+        exit 1
+    fi
+fi
+
+if [ ! -z "$ZUUL_CHANGE" ]; then
+    echo "Triggered by: $GERRIT_SITE/$ZUUL_CHANGE"
+fi
+
+set -x
+if [[ ! -e .git ]]; then
+    ls -a
+    rm -fr .[^.]* ./*
+    if [ -d /opt/git/$ZUUL_PROJECT/.git ]; then
+        git_timed clone file:///opt/git/$ZUUL_PROJECT .
+    else
+        git_timed clone $GIT_ORIGIN/$ZUUL_PROJECT .
+    fi
+fi
+git remote set-url origin $GIT_ORIGIN/$ZUUL_PROJECT
+
+# attempt to work around bugs 925790 and 1229352
+if ! git_timed remote update; then
+    echo "The remote update failed, so garbage collecting before trying again."
+    git gc
+    git_timed remote update
+fi
+
+git reset --hard
+if ! git clean -x -f -d -q ; then
+    sleep 1
+    git clean -x -f -d -q
+fi
+
+if echo "$ZUUL_REF" | grep -q ^refs/tags/; then
+    git_timed fetch --tags $ZUUL_URL/$ZUUL_PROJECT
+    git checkout $ZUUL_REF
+    git reset --hard $ZUUL_REF
+elif [ -z "$ZUUL_NEWREV" ]; then
+    git_timed fetch $ZUUL_URL/$ZUUL_PROJECT $ZUUL_REF
+    git checkout FETCH_HEAD
+    git reset --hard FETCH_HEAD
+else
+    git checkout $ZUUL_NEWREV
+    git reset --hard $ZUUL_NEWREV
+fi
+
+if ! git clean -x -f -d -q ; then
+    sleep 1
+    git clean -x -f -d -q
+fi
+
+if [ -f .gitmodules ]; then
+    git_timed submodule init
+    git_timed submodule sync
+    git_timed submodule update --init
+fi

config/nodepool/scripts/prepare_node.sh

@@ -57,11 +57,13 @@ sudo service mysql stop
 sudo pip install -U $PIP_PACKAGES
 git clone https://git.openstack.org/openstack/sahara /tmp/sahara
 git clone https://git.openstack.org/openstack/sahara-tests /tmp/sahara-tests
+git clone https://git.openstack.org/openstack/sahara-ci-config /tmp/sahara-ci-config
 sudo pip install -U -r /tmp/sahara/requirements.txt -c https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt
 git clone https://git.openstack.org/openstack-infra/project-config /tmp/project-config
 sudo mkdir -p /usr/local/jenkins/
 sudo mv /tmp/project-config/jenkins/scripts /usr/local/jenkins/slave_scripts
-rm -rf /tmp/sahara /tmp/sahara-tests /tmp/project-config
+sudo mv /tmp/sahara-ci-config/config/nodepool/scripts/gerrit-git-prep.sh /usr/local/jenkins/slave_scripts
+rm -rf /tmp/sahara /tmp/sahara-tests /tmp/project-config /tmp/sahara-ci-config
 
 # create jenkins user
 sudo useradd -d /home/jenkins -G sudo -s /bin/bash -m jenkins