| #!/bin/bash | 
 | # | 
 | # functions-common - Common functions used by DevStack components | 
 | # | 
 | # The canonical copy of this file is maintained in the DevStack repo. | 
 | # All modifications should be made there and then sync'ed to other repos | 
 | # as required. | 
 | # | 
 | # This file is sorted alphabetically within the function groups. | 
 | # | 
 | # - Config Functions | 
 | # - Control Functions | 
 | # - Distro Functions | 
 | # - Git Functions | 
 | # - OpenStack Functions | 
 | # - Package Functions | 
 | # - Process Functions | 
 | # - Service Functions | 
 | # - System Functions | 
 | # | 
 | # The following variables are assumed to be defined by certain functions: | 
 | # | 
 | # - ``ENABLED_SERVICES`` | 
 | # - ``ERROR_ON_CLONE`` | 
 | # - ``FILES`` | 
 | # - ``OFFLINE`` | 
 | # - ``RECLONE`` | 
 | # - ``REQUIREMENTS_DIR`` | 
 | # - ``STACK_USER`` | 
 | # - ``TRACK_DEPENDS`` | 
 | # - ``http_proxy``, ``https_proxy``, ``no_proxy`` | 
 | # | 
 |  | 
 | # Save trace setting | 
 | _XTRACE_FUNCTIONS_COMMON=$(set +o | grep xtrace) | 
 | set +o xtrace | 
 |  | 
 | # ensure we don't re-source this in the same environment | 
 | [[ -z "$_DEVSTACK_FUNCTIONS_COMMON" ]] || return 0 | 
 | declare -r _DEVSTACK_FUNCTIONS_COMMON=1 | 
 |  | 
 | # Global Config Variables | 
 | declare -A GITREPO | 
 | declare -A GITBRANCH | 
 | declare -A GITDIR | 
 |  | 
 | TRACK_DEPENDS=${TRACK_DEPENDS:-False} | 
 |  | 
 | # Save these variables to .stackenv | 
 | STACK_ENV_VARS="BASE_SQL_CONN DATA_DIR DEST ENABLED_SERVICES HOST_IP \ | 
 |     KEYSTONE_AUTH_PROTOCOL KEYSTONE_AUTH_URI KEYSTONE_SERVICE_URI \ | 
 |     LOGFILE OS_CACERT SERVICE_HOST SERVICE_PROTOCOL STACK_USER TLS_IP \ | 
 |     HOST_IPV6 SERVICE_IP_VERSION" | 
 |  | 
 |  | 
 | # Saves significant environment variables to .stackenv for later use | 
 | # Refers to a lot of globals, only TOP_DIR and STACK_ENV_VARS are required to | 
 | # function, the rest are simply saved and do not cause problems if they are undefined. | 
 | # save_stackenv [tag] | 
 | function save_stackenv { | 
 |     local tag=${1:-""} | 
 |     # Save some values we generated for later use | 
 |     time_stamp=$(date "+$TIMESTAMP_FORMAT") | 
 |     echo "# $time_stamp $tag" >$TOP_DIR/.stackenv | 
 |     for i in $STACK_ENV_VARS; do | 
 |         echo $i=${!i} >>$TOP_DIR/.stackenv | 
 |     done | 
 | } | 
 |  | 
 | # Update/create user clouds.yaml file. | 
 | # clouds.yaml will have | 
 | # - A `devstack` entry for the `demo` user for the `demo` project. | 
 | # - A `devstack-admin` entry for the `admin` user for the `admin` project. | 
 | # write_clouds_yaml | 
 | function write_clouds_yaml { | 
 |     # The location is a variable to allow for easier refactoring later to make it | 
 |     # overridable. There is currently no usecase where doing so makes sense, so | 
 |     # it's not currently configurable. | 
 |  | 
 |     CLOUDS_YAML=/etc/openstack/clouds.yaml | 
 |  | 
 |     sudo mkdir -p $(dirname $CLOUDS_YAML) | 
 |     sudo chown -R $STACK_USER /etc/openstack | 
 |  | 
 |     CA_CERT_ARG='' | 
 |     if [ -f "$SSL_BUNDLE_FILE" ]; then | 
 |         CA_CERT_ARG="--os-cacert $SSL_BUNDLE_FILE" | 
 |     fi | 
 |     # demo -> devstack | 
 |     $TOP_DIR/tools/update_clouds_yaml.py \ | 
 |         --file $CLOUDS_YAML \ | 
 |         --os-cloud devstack \ | 
 |         --os-region-name $REGION_NAME \ | 
 |         --os-identity-api-version 3 \ | 
 |         $CA_CERT_ARG \ | 
 |         --os-auth-url $KEYSTONE_AUTH_URI \ | 
 |         --os-username demo \ | 
 |         --os-password $ADMIN_PASSWORD \ | 
 |         --os-project-name demo | 
 |  | 
 |     # alt_demo -> devstack-alt | 
 |     $TOP_DIR/tools/update_clouds_yaml.py \ | 
 |         --file $CLOUDS_YAML \ | 
 |         --os-cloud devstack-alt \ | 
 |         --os-region-name $REGION_NAME \ | 
 |         --os-identity-api-version 3 \ | 
 |         $CA_CERT_ARG \ | 
 |         --os-auth-url $KEYSTONE_AUTH_URI \ | 
 |         --os-username alt_demo \ | 
 |         --os-password $ADMIN_PASSWORD \ | 
 |         --os-project-name alt_demo | 
 |  | 
 |     # admin -> devstack-admin | 
 |     $TOP_DIR/tools/update_clouds_yaml.py \ | 
 |         --file $CLOUDS_YAML \ | 
 |         --os-cloud devstack-admin \ | 
 |         --os-region-name $REGION_NAME \ | 
 |         --os-identity-api-version 3 \ | 
 |         $CA_CERT_ARG \ | 
 |         --os-auth-url $KEYSTONE_AUTH_URI \ | 
 |         --os-username admin \ | 
 |         --os-password $ADMIN_PASSWORD \ | 
 |         --os-project-name admin | 
 |  | 
 |     # CLean up any old clouds.yaml files we had laying around | 
 |     rm -f ~$STACK_USER/.config/openstack/clouds.yaml | 
 | } | 
 |  | 
 | # trueorfalse <True|False> <VAR> | 
 | # | 
 | # Normalize config-value provided in variable VAR to either "True" or | 
 | # "False".  If VAR is unset (i.e. $VAR evaluates as empty), the value | 
 | # of the second argument will be used as the default value. | 
 | # | 
 | #  Accepts as False: 0 no  No  NO  false False FALSE | 
 | #  Accepts as True:  1 yes Yes YES true  True  TRUE | 
 | # | 
 | # usage: | 
 | #  VAL=$(trueorfalse False VAL) | 
 | function trueorfalse { | 
 |     local xtrace | 
 |     xtrace=$(set +o | grep xtrace) | 
 |     set +o xtrace | 
 |  | 
 |     local default=$1 | 
 |  | 
 |     if [ -z $2 ]; then | 
 |         die $LINENO "variable to normalize required" | 
 |     fi | 
 |     local testval=${!2:-} | 
 |  | 
 |     case "$testval" in | 
 |         "1" | [yY]es | "YES" | [tT]rue | "TRUE" ) echo "True" ;; | 
 |         "0" | [nN]o | "NO" | [fF]alse | "FALSE" ) echo "False" ;; | 
 |         * )                                       echo "$default" ;; | 
 |     esac | 
 |  | 
 |     $xtrace | 
 | } | 
 |  | 
 | function isset { | 
 |     [[ -v "$1" ]] | 
 | } | 
 |  | 
 |  | 
 | # Control Functions | 
 | # ================= | 
 |  | 
 | # Prints backtrace info | 
 | # filename:lineno:function | 
 | # backtrace level | 
 | function backtrace { | 
 |     local level=$1 | 
 |     local deep | 
 |     deep=$((${#BASH_SOURCE[@]} - 1)) | 
 |     echo "[Call Trace]" | 
 |     while [ $level -le $deep ]; do | 
 |         echo "${BASH_SOURCE[$deep]}:${BASH_LINENO[$deep-1]}:${FUNCNAME[$deep-1]}" | 
 |         deep=$((deep - 1)) | 
 |     done | 
 | } | 
 |  | 
 | # Prints line number and "message" then exits | 
 | # die $LINENO "message" | 
 | function die { | 
 |     local exitcode=$? | 
 |     set +o xtrace | 
 |     local line=$1; shift | 
 |     if [ $exitcode == 0 ]; then | 
 |         exitcode=1 | 
 |     fi | 
 |     backtrace 2 | 
 |     err $line "$*" | 
 |     # Give buffers a second to flush | 
 |     sleep 1 | 
 |     exit $exitcode | 
 | } | 
 |  | 
 | # Checks an environment variable is not set or has length 0 OR if the | 
 | # exit code is non-zero and prints "message" and exits | 
 | # NOTE: env-var is the variable name without a '$' | 
 | # die_if_not_set $LINENO env-var "message" | 
 | function die_if_not_set { | 
 |     local exitcode=$? | 
 |     local xtrace | 
 |     xtrace=$(set +o | grep xtrace) | 
 |     set +o xtrace | 
 |     local line=$1; shift | 
 |     local evar=$1; shift | 
 |     if ! is_set $evar || [ $exitcode != 0 ]; then | 
 |         die $line "$*" | 
 |     fi | 
 |     $xtrace | 
 | } | 
 |  | 
 | function deprecated { | 
 |     local text=$1 | 
 |     DEPRECATED_TEXT+="\n$text" | 
 |     echo "WARNING: $text" | 
 | } | 
 |  | 
 | # Prints line number and "message" in error format | 
 | # err $LINENO "message" | 
 | function err { | 
 |     local exitcode=$? | 
 |     local xtrace | 
 |     xtrace=$(set +o | grep xtrace) | 
 |     set +o xtrace | 
 |     local msg="[ERROR] ${BASH_SOURCE[2]}:$1 $2" | 
 |     echo $msg 1>&2; | 
 |     if [[ -n ${LOGDIR} ]]; then | 
 |         echo $msg >> "${LOGDIR}/error.log" | 
 |     fi | 
 |     $xtrace | 
 |     return $exitcode | 
 | } | 
 |  | 
 | # Checks an environment variable is not set or has length 0 OR if the | 
 | # exit code is non-zero and prints "message" | 
 | # NOTE: env-var is the variable name without a '$' | 
 | # err_if_not_set $LINENO env-var "message" | 
 | function err_if_not_set { | 
 |     local exitcode=$? | 
 |     local xtrace | 
 |     xtrace=$(set +o | grep xtrace) | 
 |     set +o xtrace | 
 |     local line=$1; shift | 
 |     local evar=$1; shift | 
 |     if ! is_set $evar || [ $exitcode != 0 ]; then | 
 |         err $line "$*" | 
 |     fi | 
 |     $xtrace | 
 |     return $exitcode | 
 | } | 
 |  | 
 | # Exit after outputting a message about the distribution not being supported. | 
 | # exit_distro_not_supported [optional-string-telling-what-is-missing] | 
 | function exit_distro_not_supported { | 
 |     if [[ -z "$DISTRO" ]]; then | 
 |         GetDistro | 
 |     fi | 
 |  | 
 |     if [ $# -gt 0 ]; then | 
 |         die $LINENO "Support for $DISTRO is incomplete: no support for $@" | 
 |     else | 
 |         die $LINENO "Support for $DISTRO is incomplete." | 
 |     fi | 
 | } | 
 |  | 
 | # Test if the named environment variable is set and not zero length | 
 | # is_set env-var | 
 | function is_set { | 
 |     local var=\$"$1" | 
 |     eval "[ -n \"$var\" ]" # For ex.: sh -c "[ -n \"$var\" ]" would be better, but several exercises depends on this | 
 | } | 
 |  | 
 | # Prints line number and "message" in warning format | 
 | # warn $LINENO "message" | 
 | function warn { | 
 |     local exitcode=$? | 
 |     local xtrace | 
 |     xtrace=$(set +o | grep xtrace) | 
 |     set +o xtrace | 
 |     local msg="[WARNING] ${BASH_SOURCE[2]}:$1 $2" | 
 |     echo $msg | 
 |     $xtrace | 
 |     return $exitcode | 
 | } | 
 |  | 
 |  | 
 | # Distro Functions | 
 | # ================ | 
 |  | 
 | # Determine OS Vendor, Release and Update | 
 |  | 
 | # | 
 | # NOTE : For portability, you almost certainly do not want to use | 
 | # these variables directly!  The "is_*" functions defined below this | 
 | # bundle up compatible platforms under larger umbrellas that we have | 
 | # determinted are compatible enough (e.g. is_ubuntu covers Ubuntu & | 
 | # Debian, is_fedora covers RPM-based distros).  Higher-level functions | 
 | # such as "install_package" further abstract things in better ways. | 
 | # | 
 | # ``os_VENDOR`` - vendor name: ``Ubuntu``, ``Fedora``, etc | 
 | # ``os_RELEASE`` - major release: ``14.04`` (Ubuntu), ``20`` (Fedora) | 
 | # ``os_PACKAGE`` - package type: ``deb`` or ``rpm`` | 
 | # ``os_CODENAME`` - vendor's codename for release: ``trusty`` | 
 |  | 
 | declare os_VENDOR os_RELEASE os_PACKAGE os_CODENAME | 
 |  | 
 | # Make a *best effort* attempt to install lsb_release packages for the | 
 | # user if not available.  Note can't use generic install_package* | 
 | # because they depend on this! | 
 | function _ensure_lsb_release { | 
 |     if [[ -x $(command -v lsb_release 2>/dev/null) ]]; then | 
 |         return | 
 |     fi | 
 |  | 
 |     if [[ -x $(command -v apt-get 2>/dev/null) ]]; then | 
 |         sudo apt-get install -y lsb-release | 
 |     elif [[ -x $(command -v zypper 2>/dev/null) ]]; then | 
 |         # XXX: old code paths seem to have assumed SUSE platforms also | 
 |         # had "yum".  Keep this ordered above yum so we don't try to | 
 |         # install the rh package.  suse calls it just "lsb" | 
 |         sudo zypper -n install lsb | 
 |     elif [[ -x $(command -v dnf 2>/dev/null) ]]; then | 
 |         sudo dnf install -y redhat-lsb-core | 
 |     elif [[ -x $(command -v yum 2>/dev/null) ]]; then | 
 |         # all rh patforms (fedora, centos, rhel) have this pkg | 
 |         sudo yum install -y redhat-lsb-core | 
 |     else | 
 |         die $LINENO "Unable to find or auto-install lsb_release" | 
 |     fi | 
 | } | 
 |  | 
 | # GetOSVersion | 
 | #  Set the following variables: | 
 | #  - os_RELEASE | 
 | #  - os_CODENAME | 
 | #  - os_VENDOR | 
 | #  - os_PACKAGE | 
 | function GetOSVersion { | 
 |     # We only support distros that provide a sane lsb_release | 
 |     _ensure_lsb_release | 
 |  | 
 |     os_RELEASE=$(lsb_release -r -s) | 
 |     os_CODENAME=$(lsb_release -c -s) | 
 |     os_VENDOR=$(lsb_release -i -s) | 
 |  | 
 |     if [[ $os_VENDOR =~ (Debian|Ubuntu|LinuxMint) ]]; then | 
 |         os_PACKAGE="deb" | 
 |     else | 
 |         os_PACKAGE="rpm" | 
 |     fi | 
 |  | 
 |     typeset -xr os_VENDOR | 
 |     typeset -xr os_RELEASE | 
 |     typeset -xr os_PACKAGE | 
 |     typeset -xr os_CODENAME | 
 | } | 
 |  | 
 | # Translate the OS version values into common nomenclature | 
 | # Sets global ``DISTRO`` from the ``os_*`` values | 
 | declare DISTRO | 
 |  | 
 | function GetDistro { | 
 |     GetOSVersion | 
 |     if [[ "$os_VENDOR" =~ (Ubuntu) || "$os_VENDOR" =~ (Debian) || \ | 
 |             "$os_VENDOR" =~ (LinuxMint) ]]; then | 
 |         # 'Everyone' refers to Ubuntu / Debian / Mint releases by | 
 |         # the code name adjective | 
 |         DISTRO=$os_CODENAME | 
 |     elif [[ "$os_VENDOR" =~ (Fedora) ]]; then | 
 |         # For Fedora, just use 'f' and the release | 
 |         DISTRO="f$os_RELEASE" | 
 |     elif [[ "$os_VENDOR" =~ (openSUSE) ]]; then | 
 |         DISTRO="opensuse-$os_RELEASE" | 
 |     elif [[ "$os_VENDOR" =~ (SUSE LINUX) ]]; then | 
 |         # just use major release | 
 |         DISTRO="sle${os_RELEASE%.*}" | 
 |     elif [[ "$os_VENDOR" =~ (Red.*Hat) || \ | 
 |         "$os_VENDOR" =~ (CentOS) || \ | 
 |         "$os_VENDOR" =~ (OracleLinux) || \ | 
 |         "$os_VENDOR" =~ (Virtuozzo) ]]; then | 
 |         # Drop the . release as we assume it's compatible | 
 |         # XXX re-evaluate when we get RHEL10 | 
 |         DISTRO="rhel${os_RELEASE::1}" | 
 |     elif [[ "$os_VENDOR" =~ (XenServer) ]]; then | 
 |         DISTRO="xs${os_RELEASE%.*}" | 
 |     elif [[ "$os_VENDOR" =~ (kvmibm) ]]; then | 
 |         DISTRO="${os_VENDOR}${os_RELEASE::1}" | 
 |     else | 
 |         # We can't make a good choice here.  Setting a sensible DISTRO | 
 |         # is part of the problem, but not the major issue -- we really | 
 |         # only use DISTRO in the code as a fine-filter. | 
 |         # | 
 |         # The bigger problem is categorising the system into one of | 
 |         # our two big categories as Ubuntu/Debian-ish or | 
 |         # Fedora/CentOS-ish. | 
 |         # | 
 |         # The setting of os_PACKAGE above is only set to "deb" based | 
 |         # on a hard-coded list of vendor names ... thus we will | 
 |         # default to thinking unknown distros are RPM based | 
 |         # (ie. is_ubuntu does not match).  But the platform will then | 
 |         # also not match in is_fedora, because that also has a list of | 
 |         # names. | 
 |         # | 
 |         # So, if you are reading this, getting your distro supported | 
 |         # is really about making sure it matches correctly in these | 
 |         # functions.  Then you can choose a sensible way to construct | 
 |         # DISTRO based on your distros release approach. | 
 |         die $LINENO "Unable to determine DISTRO, can not continue." | 
 |     fi | 
 |     typeset -xr DISTRO | 
 | } | 
 |  | 
 | # Utility function for checking machine architecture | 
 | # is_arch arch-type | 
 | function is_arch { | 
 |     [[ "$(uname -m)" == "$1" ]] | 
 | } | 
 |  | 
 | # Determine if current distribution is an Oracle distribution | 
 | # is_oraclelinux | 
 | function is_oraclelinux { | 
 |     if [[ -z "$os_VENDOR" ]]; then | 
 |         GetOSVersion | 
 |     fi | 
 |  | 
 |     [ "$os_VENDOR" = "OracleLinux" ] | 
 | } | 
 |  | 
 |  | 
 | # Determine if current distribution is a Fedora-based distribution | 
 | # (Fedora, RHEL, CentOS, etc). | 
 | # is_fedora | 
 | function is_fedora { | 
 |     if [[ -z "$os_VENDOR" ]]; then | 
 |         GetOSVersion | 
 |     fi | 
 |  | 
 |     [ "$os_VENDOR" = "Fedora" ] || [ "$os_VENDOR" = "Red Hat" ] || \ | 
 |         [ "$os_VENDOR" = "RedHatEnterpriseServer" ] || \ | 
 |         [ "$os_VENDOR" = "CentOS" ] || [ "$os_VENDOR" = "OracleLinux" ] || \ | 
 |         [ "$os_VENDOR" = "Virtuozzo" ] || [ "$os_VENDOR" = "kvmibm" ] | 
 | } | 
 |  | 
 |  | 
 | # Determine if current distribution is a SUSE-based distribution | 
 | # (openSUSE, SLE). | 
 | # is_suse | 
 | function is_suse { | 
 |     if [[ -z "$os_VENDOR" ]]; then | 
 |         GetOSVersion | 
 |     fi | 
 |  | 
 |     [[ "$os_VENDOR" =~ (openSUSE) || "$os_VENDOR" == "SUSE LINUX" ]] | 
 | } | 
 |  | 
 |  | 
 | # Determine if current distribution is an Ubuntu-based distribution | 
 | # It will also detect non-Ubuntu but Debian-based distros | 
 | # is_ubuntu | 
 | function is_ubuntu { | 
 |     if [[ -z "$os_PACKAGE" ]]; then | 
 |         GetOSVersion | 
 |     fi | 
 |     [ "$os_PACKAGE" = "deb" ] | 
 | } | 
 |  | 
 |  | 
 | # Git Functions | 
 | # ============= | 
 |  | 
 | # Returns openstack release name for a given branch name | 
 | # ``get_release_name_from_branch branch-name`` | 
 | function get_release_name_from_branch { | 
 |     local branch=$1 | 
 |     if [[ $branch =~ "stable/" || $branch =~ "proposed/" ]]; then | 
 |         echo ${branch#*/} | 
 |     else | 
 |         echo "master" | 
 |     fi | 
 | } | 
 |  | 
 | # git clone only if directory doesn't exist already.  Since ``DEST`` might not | 
 | # be owned by the installation user, we create the directory and change the | 
 | # ownership to the proper user. | 
 | # Set global ``RECLONE=yes`` to simulate a clone when dest-dir exists | 
 | # Set global ``ERROR_ON_CLONE=True`` to abort execution with an error if the git repo | 
 | # does not exist (default is False, meaning the repo will be cloned). | 
 | # Uses globals ``ERROR_ON_CLONE``, ``OFFLINE``, ``RECLONE`` | 
 | # git_clone remote dest-dir branch | 
 | function git_clone { | 
 |     local git_remote=$1 | 
 |     local git_dest=$2 | 
 |     local git_ref=$3 | 
 |     local orig_dir | 
 |     orig_dir=$(pwd) | 
 |     local git_clone_flags="" | 
 |  | 
 |     RECLONE=$(trueorfalse False RECLONE) | 
 |     if [[ "${GIT_DEPTH}" -gt 0 ]]; then | 
 |         git_clone_flags="$git_clone_flags --depth $GIT_DEPTH" | 
 |     fi | 
 |  | 
 |     if [[ "$OFFLINE" = "True" ]]; then | 
 |         echo "Running in offline mode, clones already exist" | 
 |         # print out the results so we know what change was used in the logs | 
 |         cd $git_dest | 
 |         git show --oneline | head -1 | 
 |         cd $orig_dir | 
 |         return | 
 |     fi | 
 |  | 
 |     if echo $git_ref | egrep -q "^refs"; then | 
 |         # If our branch name is a gerrit style refs/changes/... | 
 |         if [[ ! -d $git_dest ]]; then | 
 |             if [[ "$ERROR_ON_CLONE" = "True" ]]; then | 
 |                 echo "The $git_dest project was not found; if this is a gate job, add" | 
 |                 echo "the project to the \$PROJECTS variable in the job definition." | 
 |                 die $LINENO "Cloning not allowed in this configuration" | 
 |             fi | 
 |             git_timed clone $git_clone_flags $git_remote $git_dest | 
 |         fi | 
 |         cd $git_dest | 
 |         git_timed fetch $git_remote $git_ref && git checkout FETCH_HEAD | 
 |     else | 
 |         # do a full clone only if the directory doesn't exist | 
 |         if [[ ! -d $git_dest ]]; then | 
 |             if [[ "$ERROR_ON_CLONE" = "True" ]]; then | 
 |                 echo "The $git_dest project was not found; if this is a gate job, add" | 
 |                 echo "the project to the \$PROJECTS variable in the job definition." | 
 |                 die $LINENO "Cloning not allowed in this configuration" | 
 |             fi | 
 |             git_timed clone $git_clone_flags $git_remote $git_dest | 
 |             cd $git_dest | 
 |             # This checkout syntax works for both branches and tags | 
 |             git checkout $git_ref | 
 |         elif [[ "$RECLONE" = "True" ]]; then | 
 |             # if it does exist then simulate what clone does if asked to RECLONE | 
 |             cd $git_dest | 
 |             # set the url to pull from and fetch | 
 |             git remote set-url origin $git_remote | 
 |             git_timed fetch origin | 
 |             # remove the existing ignored files (like pyc) as they cause breakage | 
 |             # (due to the py files having older timestamps than our pyc, so python | 
 |             # thinks the pyc files are correct using them) | 
 |             find $git_dest -name '*.pyc' -delete | 
 |  | 
 |             # handle git_ref accordingly to type (tag, branch) | 
 |             if [[ -n "`git show-ref refs/tags/$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 | 
 |             else | 
 |                 die $LINENO "$git_ref is neither branch nor tag" | 
 |             fi | 
 |  | 
 |         fi | 
 |     fi | 
 |  | 
 |     # print out the results so we know what change was used in the logs | 
 |     cd $git_dest | 
 |     git show --oneline | head -1 | 
 |     cd $orig_dir | 
 | } | 
 |  | 
 | # A variation on git clone that lets us specify a project by it's | 
 | # actual name, like oslo.config. This is exceptionally useful in the | 
 | # library installation case | 
 | function git_clone_by_name { | 
 |     local name=$1 | 
 |     local repo=${GITREPO[$name]} | 
 |     local dir=${GITDIR[$name]} | 
 |     local branch=${GITBRANCH[$name]} | 
 |     git_clone $repo $dir $branch | 
 | } | 
 |  | 
 |  | 
 | # git can sometimes get itself infinitely stuck with transient network | 
 | # errors or other issues with the remote end.  This wraps git in a | 
 | # timeout/retry loop and is intended to watch over non-local git | 
 | # processes that might hang.  GIT_TIMEOUT, if set, is passed directly | 
 | # to timeout(1); otherwise the default value of 0 maintains the status | 
 | # quo of waiting forever. | 
 | # usage: git_timed <git-command> | 
 | function git_timed { | 
 |     local count=0 | 
 |     local timeout=0 | 
 |  | 
 |     if [[ -n "${GIT_TIMEOUT}" ]]; then | 
 |         timeout=${GIT_TIMEOUT} | 
 |     fi | 
 |  | 
 |     time_start "git_timed" | 
 |     until timeout -s SIGINT ${timeout} git "$@"; do | 
 |         # 124 is timeout(1)'s special return code when it reached the | 
 |         # timeout; otherwise assume fatal failure | 
 |         if [[ $? -ne 124 ]]; then | 
 |             die $LINENO "git call failed: [git $@]" | 
 |         fi | 
 |  | 
 |         count=$(($count + 1)) | 
 |         warn $LINENO "timeout ${count} for git call: [git $@]" | 
 |         if [ $count -eq 3 ]; then | 
 |             die $LINENO "Maximum of 3 git retries reached" | 
 |         fi | 
 |         sleep 5 | 
 |     done | 
 |     time_stop "git_timed" | 
 | } | 
 |  | 
 | # 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_timed fetch origin tag $git_tag | 
 |     git checkout -f $git_tag | 
 | } | 
 |  | 
 |  | 
 | # OpenStack Functions | 
 | # =================== | 
 |  | 
 | # Get the default value for HOST_IP | 
 | # get_default_host_ip fixed_range floating_range host_ip_iface host_ip | 
 | function get_default_host_ip { | 
 |     local fixed_range=$1 | 
 |     local floating_range=$2 | 
 |     local host_ip_iface=$3 | 
 |     local host_ip=$4 | 
 |     local af=$5 | 
 |  | 
 |     # Search for an IP unless an explicit is set by ``HOST_IP`` environment variable | 
 |     if [ -z "$host_ip" -o "$host_ip" == "dhcp" ]; then | 
 |         host_ip="" | 
 |         # Find the interface used for the default route | 
 |         host_ip_iface=${host_ip_iface:-$(ip -f $af route | awk '/default/ {print $5}' | head -1)} | 
 |         local host_ips | 
 |         host_ips=$(LC_ALL=C ip -f $af addr show ${host_ip_iface} | sed /temporary/d |awk /$af'/ {split($2,parts,"/");  print parts[1]}') | 
 |         local ip | 
 |         for ip in $host_ips; do | 
 |             # Attempt to filter out IP addresses that are part of the fixed and | 
 |             # floating range. Note that this method only works if the ``netaddr`` | 
 |             # python library is installed. If it is not installed, an error | 
 |             # will be printed and the first IP from the interface will be used. | 
 |             # If that is not correct set ``HOST_IP`` in ``localrc`` to the correct | 
 |             # address. | 
 |             if [[ "$af" == "inet6" ]]; then | 
 |                 host_ip=$ip | 
 |                 break; | 
 |             fi | 
 |             if ! (address_in_net $ip $fixed_range || address_in_net $ip $floating_range); then | 
 |                 host_ip=$ip | 
 |                 break; | 
 |             fi | 
 |         done | 
 |     fi | 
 |     echo $host_ip | 
 | } | 
 |  | 
 | # Generates hex string from ``size`` byte of pseudo random data | 
 | # generate_hex_string size | 
 | function generate_hex_string { | 
 |     local size=$1 | 
 |     hexdump -n "$size" -v -e '/1 "%02x"' /dev/urandom | 
 | } | 
 |  | 
 | # Grab a numbered field from python prettytable output | 
 | # Fields are numbered starting with 1 | 
 | # Reverse syntax is supported: -1 is the last field, -2 is second to last, etc. | 
 | # get_field field-number | 
 | function get_field { | 
 |     local data field | 
 |     while read data; do | 
 |         if [ "$1" -lt 0 ]; then | 
 |             field="(\$(NF$1))" | 
 |         else | 
 |             field="\$$(($1 + 1))" | 
 |         fi | 
 |         echo "$data" | awk -F'[ \t]*\\|[ \t]*' "{print $field}" | 
 |     done | 
 | } | 
 |  | 
 | # install default policy | 
 | # copy over a default policy.json and policy.d for projects | 
 | function install_default_policy { | 
 |     local project=$1 | 
 |     local project_uc | 
 |     project_uc=$(echo $1|tr a-z A-Z) | 
 |     local conf_dir="${project_uc}_CONF_DIR" | 
 |     # eval conf dir to get the variable | 
 |     conf_dir="${!conf_dir}" | 
 |     local project_dir="${project_uc}_DIR" | 
 |     # eval project dir to get the variable | 
 |     project_dir="${!project_dir}" | 
 |     local sample_conf_dir="${project_dir}/etc/${project}" | 
 |     local sample_policy_dir="${project_dir}/etc/${project}/policy.d" | 
 |  | 
 |     # first copy any policy.json | 
 |     cp -p $sample_conf_dir/policy.json $conf_dir | 
 |     # then optionally copy over policy.d | 
 |     if [[ -d $sample_policy_dir ]]; then | 
 |         cp -r $sample_policy_dir $conf_dir/policy.d | 
 |     fi | 
 | } | 
 |  | 
 | # Add a policy to a policy.json file | 
 | # Do nothing if the policy already exists | 
 | # ``policy_add policy_file policy_name policy_permissions`` | 
 | function policy_add { | 
 |     local policy_file=$1 | 
 |     local policy_name=$2 | 
 |     local policy_perm=$3 | 
 |  | 
 |     if grep -q ${policy_name} ${policy_file}; then | 
 |         echo "Policy ${policy_name} already exists in ${policy_file}" | 
 |         return | 
 |     fi | 
 |  | 
 |     # Add a terminating comma to policy lines without one | 
 |     # Remove the closing '}' and all lines following to the end-of-file | 
 |     local tmpfile | 
 |     tmpfile=$(mktemp) | 
 |     uniq ${policy_file} | sed -e ' | 
 |         s/]$/],/ | 
 |         /^[}]/,$d | 
 |     ' > ${tmpfile} | 
 |  | 
 |     # Append policy and closing brace | 
 |     echo "    \"${policy_name}\": ${policy_perm}" >>${tmpfile} | 
 |     echo "}" >>${tmpfile} | 
 |  | 
 |     mv ${tmpfile} ${policy_file} | 
 | } | 
 |  | 
 | # Gets or creates a domain | 
 | # Usage: get_or_create_domain <name> <description> | 
 | function get_or_create_domain { | 
 |     local domain_id | 
 |     # Gets domain id | 
 |     domain_id=$( | 
 |         # Gets domain id | 
 |         openstack domain show $1 \ | 
 |             -f value -c id 2>/dev/null || | 
 |         # Creates new domain | 
 |         openstack domain create $1 \ | 
 |             --description "$2" \ | 
 |             -f value -c id | 
 |     ) | 
 |     echo $domain_id | 
 | } | 
 |  | 
 | # Gets or creates group | 
 | # Usage: get_or_create_group <groupname> <domain> [<description>] | 
 | function get_or_create_group { | 
 |     local desc="${3:-}" | 
 |     local group_id | 
 |     # Gets group id | 
 |     group_id=$( | 
 |         # Creates new group with --or-show | 
 |         openstack group create $1 \ | 
 |             --domain $2 --description "$desc" --or-show \ | 
 |             -f value -c id | 
 |     ) | 
 |     echo $group_id | 
 | } | 
 |  | 
 | # Gets or creates user | 
 | # Usage: get_or_create_user <username> <password> <domain> [<email>] | 
 | function get_or_create_user { | 
 |     local user_id | 
 |     if [[ ! -z "$4" ]]; then | 
 |         local email="--email=$4" | 
 |     else | 
 |         local email="" | 
 |     fi | 
 |     # Gets user id | 
 |     user_id=$( | 
 |         # Creates new user with --or-show | 
 |         openstack user create \ | 
 |             $1 \ | 
 |             --password "$2" \ | 
 |             --domain=$3 \ | 
 |             $email \ | 
 |             --or-show \ | 
 |             -f value -c id | 
 |     ) | 
 |     echo $user_id | 
 | } | 
 |  | 
 | # Gets or creates project | 
 | # Usage: get_or_create_project <name> <domain> | 
 | function get_or_create_project { | 
 |     local project_id | 
 |     project_id=$( | 
 |         # Creates new project with --or-show | 
 |         openstack project create $1 \ | 
 |             --domain=$2 \ | 
 |             --or-show -f value -c id | 
 |     ) | 
 |     echo $project_id | 
 | } | 
 |  | 
 | # Gets or creates role | 
 | # Usage: get_or_create_role <name> | 
 | function get_or_create_role { | 
 |     local role_id | 
 |     role_id=$( | 
 |         # Creates role with --or-show | 
 |         openstack role create $1 \ | 
 |             --or-show -f value -c id | 
 |     ) | 
 |     echo $role_id | 
 | } | 
 |  | 
 | # Gets or adds user role to project | 
 | # Usage: get_or_add_user_project_role <role> <user> <project> | 
 | function get_or_add_user_project_role { | 
 |     local user_role_id | 
 |     # Gets user role id | 
 |     user_role_id=$(openstack role list \ | 
 |         --user $2 \ | 
 |         --column "ID" \ | 
 |         --project $3 \ | 
 |         --column "Name" \ | 
 |         | grep " $1 " | get_field 1) | 
 |     if [[ -z "$user_role_id" ]]; then | 
 |         # Adds role to user and get it | 
 |         openstack role add $1 \ | 
 |             --user $2 \ | 
 |             --project $3 | 
 |         user_role_id=$(openstack role list \ | 
 |             --user $2 \ | 
 |             --column "ID" \ | 
 |             --project $3 \ | 
 |             --column "Name" \ | 
 |             | grep " $1 " | get_field 1) | 
 |     fi | 
 |     echo $user_role_id | 
 | } | 
 |  | 
 | # Gets or adds user role to domain | 
 | # Usage: get_or_add_user_domain_role <role> <user> <domain> | 
 | function get_or_add_user_domain_role { | 
 |     local user_role_id | 
 |     # Gets user role id | 
 |     user_role_id=$(openstack role list \ | 
 |         --user $2 \ | 
 |         --column "ID" \ | 
 |         --domain $3 \ | 
 |         --column "Name" \ | 
 |         | grep " $1 " | get_field 1) | 
 |     if [[ -z "$user_role_id" ]]; then | 
 |         # Adds role to user and get it | 
 |         openstack role add $1 \ | 
 |             --user $2 \ | 
 |             --domain $3 | 
 |         user_role_id=$(openstack role list \ | 
 |             --user $2 \ | 
 |             --column "ID" \ | 
 |             --domain $3 \ | 
 |             --column "Name" \ | 
 |             | grep " $1 " | get_field 1) | 
 |     fi | 
 |     echo $user_role_id | 
 | } | 
 |  | 
 | # Gets or adds user role to domain | 
 | # Usage: get_or_add_user_domain_role <role> <user> <domain> | 
 | function get_or_add_user_domain_role { | 
 |     local user_role_id | 
 |     # Gets user role id | 
 |     user_role_id=$(openstack role list \ | 
 |         --user $2 \ | 
 |         --os-url=$KEYSTONE_SERVICE_URI_V3 \ | 
 |         --os-identity-api-version=3 \ | 
 |         --column "ID" \ | 
 |         --domain $3 \ | 
 |         --column "Name" \ | 
 |         | grep " $1 " | get_field 1) | 
 |     if [[ -z "$user_role_id" ]]; then | 
 |         # Adds role to user and get it | 
 |         openstack role add $1 \ | 
 |             --user $2 \ | 
 |             --domain $3 \ | 
 |             --os-url=$KEYSTONE_SERVICE_URI_V3 \ | 
 |             --os-identity-api-version=3 | 
 |         user_role_id=$(openstack role list \ | 
 |             --user $2 \ | 
 |             --os-url=$KEYSTONE_SERVICE_URI_V3 \ | 
 |             --os-identity-api-version=3 \ | 
 |             --column "ID" \ | 
 |             --domain $3 \ | 
 |             --column "Name" \ | 
 |             | grep " $1 " | get_field 1) | 
 |     fi | 
 |     echo $user_role_id | 
 | } | 
 |  | 
 | # Gets or adds group role to project | 
 | # Usage: get_or_add_group_project_role <role> <group> <project> | 
 | function get_or_add_group_project_role { | 
 |     local group_role_id | 
 |     # Gets group role id | 
 |     group_role_id=$(openstack role list \ | 
 |         --group $2 \ | 
 |         --project $3 \ | 
 |         -c "ID" -f value) | 
 |     if [[ -z "$group_role_id" ]]; then | 
 |         # Adds role to group and get it | 
 |         openstack role add $1 \ | 
 |             --group $2 \ | 
 |             --project $3 | 
 |         group_role_id=$(openstack role list \ | 
 |             --group $2 \ | 
 |             --project $3 \ | 
 |             -c "ID" -f value) | 
 |     fi | 
 |     echo $group_role_id | 
 | } | 
 |  | 
 | # Gets or creates service | 
 | # Usage: get_or_create_service <name> <type> <description> | 
 | function get_or_create_service { | 
 |     local service_id | 
 |     # Gets service id | 
 |     service_id=$( | 
 |         # Gets service id | 
 |         openstack service show $2 -f value -c id 2>/dev/null || | 
 |         # Creates new service if not exists | 
 |         openstack service create \ | 
 |             $2 \ | 
 |             --name $1 \ | 
 |             --description="$3" \ | 
 |             -f value -c id | 
 |     ) | 
 |     echo $service_id | 
 | } | 
 |  | 
 | # Create an endpoint with a specific interface | 
 | # Usage: _get_or_create_endpoint_with_interface <service> <interface> <url> <region> | 
 | function _get_or_create_endpoint_with_interface { | 
 |     local endpoint_id | 
 |     endpoint_id=$(openstack endpoint list \ | 
 |         --service $1 \ | 
 |         --interface $2 \ | 
 |         --region $4 \ | 
 |         -c ID -f value) | 
 |     if [[ -z "$endpoint_id" ]]; then | 
 |         # Creates new endpoint | 
 |         endpoint_id=$(openstack endpoint create \ | 
 |             $1 $2 $3 --region $4 -f value -c id) | 
 |     fi | 
 |  | 
 |     echo $endpoint_id | 
 | } | 
 |  | 
 | # Gets or creates endpoint | 
 | # Usage: get_or_create_endpoint <service> <region> <publicurl> <adminurl> <internalurl> | 
 | function get_or_create_endpoint { | 
 |     # NOTE(jamielennnox): when converting to v3 endpoint creation we go from | 
 |     # creating one endpoint with multiple urls to multiple endpoints each with | 
 |     # a different interface.  To maintain the existing function interface we | 
 |     # create 3 endpoints and return the id of the public one. In reality | 
 |     # returning the public id will not make a lot of difference as there are no | 
 |     # scenarios currently that use the returned id. Ideally this behaviour | 
 |     # should be pushed out to the service setups and let them create the | 
 |     # endpoints they need. | 
 |     local public_id | 
 |     public_id=$(_get_or_create_endpoint_with_interface $1 public $3 $2) | 
 |     _get_or_create_endpoint_with_interface $1 admin $4 $2 | 
 |     _get_or_create_endpoint_with_interface $1 internal $5 $2 | 
 |  | 
 |     # return the public id to indicate success, and this is the endpoint most likely wanted | 
 |     echo $public_id | 
 | } | 
 |  | 
 | # Get a URL from the identity service | 
 | # Usage: get_endpoint_url <service> <interface> | 
 | function get_endpoint_url { | 
 |     echo $(openstack endpoint list \ | 
 |             --service $1 --interface $2 \ | 
 |             -c URL -f value) | 
 | } | 
 |  | 
 | # check if we are using ironic with hardware | 
 | # TODO(jroll) this is a kludge left behind when ripping ironic code | 
 | # out of tree, as it is used by nova and neutron. | 
 | # figure out a way to refactor nova/neutron code to eliminate this | 
 | function is_ironic_hardware { | 
 |     is_service_enabled ironic && [[ "$IRONIC_IS_HARDWARE" == "True" ]] && return 0 | 
 |     return 1 | 
 | } | 
 |  | 
 |  | 
 | # Package Functions | 
 | # ================= | 
 |  | 
 | # _get_package_dir | 
 | function _get_package_dir { | 
 |     local base_dir=$1 | 
 |     local pkg_dir | 
 |  | 
 |     if [[ -z "$base_dir" ]]; then | 
 |         base_dir=$FILES | 
 |     fi | 
 |     if is_ubuntu; then | 
 |         pkg_dir=$base_dir/debs | 
 |     elif is_fedora; then | 
 |         pkg_dir=$base_dir/rpms | 
 |     elif is_suse; then | 
 |         pkg_dir=$base_dir/rpms-suse | 
 |     else | 
 |         exit_distro_not_supported "list of packages" | 
 |     fi | 
 |     echo "$pkg_dir" | 
 | } | 
 |  | 
 | # Wrapper for ``apt-get update`` to try multiple times on the update | 
 | # to address bad package mirrors (which happen all the time). | 
 | function apt_get_update { | 
 |     # only do this once per run | 
 |     if [[ "$REPOS_UPDATED" == "True" && "$RETRY_UPDATE" != "True" ]]; then | 
 |         return | 
 |     fi | 
 |  | 
 |     # bail if we are offline | 
 |     [[ "$OFFLINE" = "True" ]] && return | 
 |  | 
 |     local sudo="sudo" | 
 |     [[ "$(id -u)" = "0" ]] && sudo="env" | 
 |  | 
 |     # time all the apt operations | 
 |     time_start "apt-get-update" | 
 |  | 
 |     local proxies="http_proxy=${http_proxy:-} https_proxy=${https_proxy:-} no_proxy=${no_proxy:-} " | 
 |     local update_cmd="$sudo $proxies apt-get update" | 
 |     if ! timeout 300 sh -c "while ! $update_cmd; do sleep 30; done"; then | 
 |         die $LINENO "Failed to update apt repos, we're dead now" | 
 |     fi | 
 |  | 
 |     REPOS_UPDATED=True | 
 |     # stop the clock | 
 |     time_stop "apt-get-update" | 
 | } | 
 |  | 
 | # Wrapper for ``apt-get`` to set cache and proxy environment variables | 
 | # Uses globals ``OFFLINE``, ``*_proxy`` | 
 | # apt_get operation package [package ...] | 
 | function apt_get { | 
 |     local xtrace result | 
 |     xtrace=$(set +o | grep xtrace) | 
 |     set +o xtrace | 
 |  | 
 |     [[ "$OFFLINE" = "True" || -z "$@" ]] && return | 
 |     local sudo="sudo" | 
 |     [[ "$(id -u)" = "0" ]] && sudo="env" | 
 |  | 
 |     # time all the apt operations | 
 |     time_start "apt-get" | 
 |  | 
 |     $xtrace | 
 |  | 
 |     $sudo DEBIAN_FRONTEND=noninteractive \ | 
 |         http_proxy=${http_proxy:-} https_proxy=${https_proxy:-} \ | 
 |         no_proxy=${no_proxy:-} \ | 
 |         apt-get --option "Dpkg::Options::=--force-confold" --assume-yes "$@" < /dev/null | 
 |     result=$? | 
 |  | 
 |     # stop the clock | 
 |     time_stop "apt-get" | 
 |     return $result | 
 | } | 
 |  | 
 | function _parse_package_files { | 
 |     local files_to_parse=$@ | 
 |  | 
 |     if [[ -z "$DISTRO" ]]; then | 
 |         GetDistro | 
 |     fi | 
 |  | 
 |     for fname in ${files_to_parse}; do | 
 |         local OIFS line package distros distro | 
 |         [[ -e $fname ]] || continue | 
 |  | 
 |         OIFS=$IFS | 
 |         IFS=$'\n' | 
 |         for line in $(<${fname}); do | 
 |             if [[ $line =~ "NOPRIME" ]]; then | 
 |                 continue | 
 |             fi | 
 |  | 
 |             # Assume we want this package; free-form | 
 |             # comments allowed after a # | 
 |             package=${line%%#*} | 
 |             inst_pkg=1 | 
 |  | 
 |             # Look for # dist:xxx in comment | 
 |             if [[ $line =~ (.*)#.*dist:([^ ]*) ]]; then | 
 |                 # We are using BASH regexp matching feature. | 
 |                 package=${BASH_REMATCH[1]} | 
 |                 distros=${BASH_REMATCH[2]} | 
 |                 # In bash ${VAR,,} will lowercase VAR | 
 |                 # Look for a match in the distro list | 
 |                 if [[ ! ${distros,,} =~ ${DISTRO,,} ]]; then | 
 |                     # If no match then skip this package | 
 |                     inst_pkg=0 | 
 |                 fi | 
 |             fi | 
 |  | 
 |             if [[ $inst_pkg = 1 ]]; then | 
 |                 echo $package | 
 |             fi | 
 |         done | 
 |         IFS=$OIFS | 
 |     done | 
 | } | 
 |  | 
 | # get_packages() collects a list of package names of any type from the | 
 | # prerequisite files in ``files/{debs|rpms}``.  The list is intended | 
 | # to be passed to a package installer such as apt or yum. | 
 | # | 
 | # Only packages required for the services in 1st argument will be | 
 | # included.  Two bits of metadata are recognized in the prerequisite files: | 
 | # | 
 | # - ``# NOPRIME`` defers installation to be performed later in `stack.sh` | 
 | # - ``# dist:DISTRO`` or ``dist:DISTRO1,DISTRO2`` limits the selection | 
 | #   of the package to the distros listed.  The distro names are case insensitive. | 
 | function get_packages { | 
 |     local xtrace | 
 |     xtrace=$(set +o | grep xtrace) | 
 |     set +o xtrace | 
 |     local services=$@ | 
 |     local package_dir | 
 |     package_dir=$(_get_package_dir) | 
 |     local file_to_parse="" | 
 |     local service="" | 
 |  | 
 |     if [ $# -ne 1 ]; then | 
 |         die $LINENO "get_packages takes a single, comma-separated argument" | 
 |     fi | 
 |  | 
 |     if [[ -z "$package_dir" ]]; then | 
 |         echo "No package directory supplied" | 
 |         return 1 | 
 |     fi | 
 |     for service in ${services//,/ }; do | 
 |         # Allow individual services to specify dependencies | 
 |         if [[ -e ${package_dir}/${service} ]]; then | 
 |             file_to_parse="${file_to_parse} ${package_dir}/${service}" | 
 |         fi | 
 |         # NOTE(sdague) n-api needs glance for now because that's where | 
 |         # glance client is | 
 |         if [[ $service == n-api ]]; then | 
 |             if [[ ! $file_to_parse =~ $package_dir/nova ]]; then | 
 |                 file_to_parse="${file_to_parse} ${package_dir}/nova" | 
 |             fi | 
 |             if [[ ! $file_to_parse =~ $package_dir/glance ]]; then | 
 |                 file_to_parse="${file_to_parse} ${package_dir}/glance" | 
 |             fi | 
 |         elif [[ $service == c-* ]]; then | 
 |             if [[ ! $file_to_parse =~ $package_dir/cinder ]]; then | 
 |                 file_to_parse="${file_to_parse} ${package_dir}/cinder" | 
 |             fi | 
 |         elif [[ $service == s-* ]]; then | 
 |             if [[ ! $file_to_parse =~ $package_dir/swift ]]; then | 
 |                 file_to_parse="${file_to_parse} ${package_dir}/swift" | 
 |             fi | 
 |         elif [[ $service == n-* ]]; then | 
 |             if [[ ! $file_to_parse =~ $package_dir/nova ]]; then | 
 |                 file_to_parse="${file_to_parse} ${package_dir}/nova" | 
 |             fi | 
 |         elif [[ $service == g-* ]]; then | 
 |             if [[ ! $file_to_parse =~ $package_dir/glance ]]; then | 
 |                 file_to_parse="${file_to_parse} ${package_dir}/glance" | 
 |             fi | 
 |         elif [[ $service == key* ]]; then | 
 |             if [[ ! $file_to_parse =~ $package_dir/keystone ]]; then | 
 |                 file_to_parse="${file_to_parse} ${package_dir}/keystone" | 
 |             fi | 
 |         elif [[ $service == q-* ]]; then | 
 |             if [[ ! $file_to_parse =~ $package_dir/neutron ]]; then | 
 |                 file_to_parse="${file_to_parse} ${package_dir}/neutron" | 
 |             fi | 
 |         elif [[ $service == ir-* ]]; then | 
 |             if [[ ! $file_to_parse =~ $package_dir/ironic ]]; then | 
 |                 file_to_parse="${file_to_parse} ${package_dir}/ironic" | 
 |             fi | 
 |         fi | 
 |     done | 
 |     echo "$(_parse_package_files $file_to_parse)" | 
 |     $xtrace | 
 | } | 
 |  | 
 | # get_plugin_packages() collects a list of package names of any type from a | 
 | # plugin's prerequisite files in ``$PLUGIN/devstack/files/{debs|rpms}``.  The | 
 | # list is intended to be passed to a package installer such as apt or yum. | 
 | # | 
 | # Only packages required for enabled and collected plugins will included. | 
 | # | 
 | # The same metadata used in the main DevStack prerequisite files may be used | 
 | # in these prerequisite files, see get_packages() for more info. | 
 | function get_plugin_packages { | 
 |     local xtrace | 
 |     xtrace=$(set +o | grep xtrace) | 
 |     set +o xtrace | 
 |     local files_to_parse="" | 
 |     local package_dir="" | 
 |     for plugin in ${DEVSTACK_PLUGINS//,/ }; do | 
 |         package_dir="$(_get_package_dir ${GITDIR[$plugin]}/devstack/files)" | 
 |         files_to_parse+=" $package_dir/$plugin" | 
 |     done | 
 |     echo "$(_parse_package_files $files_to_parse)" | 
 |     $xtrace | 
 | } | 
 |  | 
 | # Distro-agnostic package installer | 
 | # Uses globals ``NO_UPDATE_REPOS``, ``REPOS_UPDATED``, ``RETRY_UPDATE`` | 
 | # install_package package [package ...] | 
 | function update_package_repo { | 
 |     NO_UPDATE_REPOS=${NO_UPDATE_REPOS:-False} | 
 |     REPOS_UPDATED=${REPOS_UPDATED:-False} | 
 |     RETRY_UPDATE=${RETRY_UPDATE:-False} | 
 |  | 
 |     if [[ "$NO_UPDATE_REPOS" = "True" ]]; then | 
 |         return 0 | 
 |     fi | 
 |  | 
 |     if is_ubuntu; then | 
 |         apt_get_update | 
 |     fi | 
 | } | 
 |  | 
 | function real_install_package { | 
 |     if is_ubuntu; then | 
 |         apt_get install "$@" | 
 |     elif is_fedora; then | 
 |         yum_install "$@" | 
 |     elif is_suse; then | 
 |         zypper_install "$@" | 
 |     else | 
 |         exit_distro_not_supported "installing packages" | 
 |     fi | 
 | } | 
 |  | 
 | # Distro-agnostic package installer | 
 | # install_package package [package ...] | 
 | function install_package { | 
 |     update_package_repo | 
 |     if ! real_install_package "$@"; then | 
 |         RETRY_UPDATE=True update_package_repo && real_install_package "$@" | 
 |     fi | 
 | } | 
 |  | 
 | # Distro-agnostic function to tell if a package is installed | 
 | # is_package_installed package [package ...] | 
 | function is_package_installed { | 
 |     if [[ -z "$@" ]]; then | 
 |         return 1 | 
 |     fi | 
 |  | 
 |     if [[ -z "$os_PACKAGE" ]]; then | 
 |         GetOSVersion | 
 |     fi | 
 |  | 
 |     if [[ "$os_PACKAGE" = "deb" ]]; then | 
 |         dpkg -s "$@" > /dev/null 2> /dev/null | 
 |     elif [[ "$os_PACKAGE" = "rpm" ]]; then | 
 |         rpm --quiet -q "$@" | 
 |     else | 
 |         exit_distro_not_supported "finding if a package is installed" | 
 |     fi | 
 | } | 
 |  | 
 | # Distro-agnostic package uninstaller | 
 | # uninstall_package package [package ...] | 
 | function uninstall_package { | 
 |     if is_ubuntu; then | 
 |         apt_get purge "$@" | 
 |     elif is_fedora; then | 
 |         sudo ${YUM:-yum} remove -y "$@" ||: | 
 |     elif is_suse; then | 
 |         sudo zypper rm "$@" ||: | 
 |     else | 
 |         exit_distro_not_supported "uninstalling packages" | 
 |     fi | 
 | } | 
 |  | 
 | # Wrapper for ``yum`` to set proxy environment variables | 
 | # Uses globals ``OFFLINE``, ``*_proxy``, ``YUM`` | 
 | # yum_install package [package ...] | 
 | function yum_install { | 
 |     local result parse_yum_result | 
 |  | 
 |     [[ "$OFFLINE" = "True" ]] && return | 
 |  | 
 |     time_start "yum_install" | 
 |  | 
 |     # - We run with LC_ALL=C so string matching *should* be OK | 
 |     # - Exit 1 if the failure might get better with a retry. | 
 |     # - Exit 2 if it is fatal. | 
 |     parse_yum_result='             \ | 
 |         BEGIN { result=0 }         \ | 
 |         /^YUM_FAILED/ { exit $2 }  \ | 
 |         /^No package/ { result=2 } \ | 
 |         /^Failed:/    { result=2 } \ | 
 |         //{ print }                \ | 
 |         END { exit result }' | 
 |  | 
 |     # The manual check for missing packages is because yum -y assumes | 
 |     # missing or failed packages are OK. | 
 |     # See https://bugzilla.redhat.com/show_bug.cgi?id=965567 | 
 |     (sudo_with_proxies "${YUM:-yum}" install -y "$@" 2>&1 || echo YUM_FAILED $?) \ | 
 |         | awk "$parse_yum_result" && result=$? || result=$? | 
 |  | 
 |     time_stop "yum_install" | 
 |  | 
 |     # if we return 1, then the wrapper functions will run an update | 
 |     # and try installing the package again as a defense against bad | 
 |     # mirrors.  This can hide failures, especially when we have | 
 |     # packages that are in the "Failed:" section because their rpm | 
 |     # install scripts failed to run correctly (in this case, the | 
 |     # package looks installed, so when the retry happens we just think | 
 |     # the package is OK, and incorrectly continue on). | 
 |     if [ "$result" == 2 ]; then | 
 |         die "Detected fatal package install failure" | 
 |     fi | 
 |  | 
 |     return "$result" | 
 | } | 
 |  | 
 | # zypper wrapper to set arguments correctly | 
 | # Uses globals ``OFFLINE``, ``*_proxy`` | 
 | # zypper_install package [package ...] | 
 | function zypper_install { | 
 |     [[ "$OFFLINE" = "True" ]] && return | 
 |     local sudo="sudo" | 
 |     [[ "$(id -u)" = "0" ]] && sudo="env" | 
 |     $sudo http_proxy="${http_proxy:-}" https_proxy="${https_proxy:-}" \ | 
 |         no_proxy="${no_proxy:-}" \ | 
 |         zypper --non-interactive install --auto-agree-with-licenses "$@" | 
 | } | 
 |  | 
 |  | 
 | # Process Functions | 
 | # ================= | 
 |  | 
 | # _run_process() is designed to be backgrounded by run_process() to simulate a | 
 | # fork.  It includes the dirty work of closing extra filehandles and preparing log | 
 | # files to produce the same logs as screen_it().  The log filename is derived | 
 | # from the service name. | 
 | # Uses globals ``CURRENT_LOG_TIME``, ``LOGDIR``, ``SCREEN_LOGDIR``, ``SCREEN_NAME``, ``SERVICE_DIR`` | 
 | # If an optional group is provided sg will be used to set the group of | 
 | # the command. | 
 | # _run_process service "command-line" [group] | 
 | function _run_process { | 
 |     # disable tracing through the exec redirects, it's just confusing in the logs. | 
 |     xtrace=$(set +o | grep xtrace) | 
 |     set +o xtrace | 
 |  | 
 |     local service=$1 | 
 |     local command="$2" | 
 |     local group=$3 | 
 |  | 
 |     # Undo logging redirections and close the extra descriptors | 
 |     exec 1>&3 | 
 |     exec 2>&3 | 
 |     exec 3>&- | 
 |     exec 6>&- | 
 |  | 
 |     local logfile="${service}.log.${CURRENT_LOG_TIME}" | 
 |     local real_logfile="${LOGDIR}/${logfile}" | 
 |     if [[ -n ${LOGDIR} ]]; then | 
 |         exec 1>&"$real_logfile" 2>&1 | 
 |         bash -c "cd '$LOGDIR' && ln -sf '$logfile' ${service}.log" | 
 |         if [[ -n ${SCREEN_LOGDIR} ]]; then | 
 |             # Drop the backward-compat symlink | 
 |             ln -sf "$real_logfile" ${SCREEN_LOGDIR}/screen-${service}.log | 
 |         fi | 
 |  | 
 |         # TODO(dtroyer): Hack to get stdout from the Python interpreter for the logs. | 
 |         export PYTHONUNBUFFERED=1 | 
 |     fi | 
 |  | 
 |     # reenable xtrace before we do *real* work | 
 |     $xtrace | 
 |  | 
 |     # Run under ``setsid`` to force the process to become a session and group leader. | 
 |     # The pid saved can be used with pkill -g to get the entire process group. | 
 |     if [[ -n "$group" ]]; then | 
 |         setsid sg $group "$command" & echo $! >$SERVICE_DIR/$SCREEN_NAME/$service.pid | 
 |     else | 
 |         setsid $command & echo $! >$SERVICE_DIR/$SCREEN_NAME/$service.pid | 
 |     fi | 
 |  | 
 |     # Just silently exit this process | 
 |     exit 0 | 
 | } | 
 |  | 
 | # Helper to remove the ``*.failure`` files under ``$SERVICE_DIR/$SCREEN_NAME``. | 
 | # This is used for ``service_check`` when all the ``screen_it`` are called finished | 
 | # Uses globals ``SCREEN_NAME``, ``SERVICE_DIR`` | 
 | # init_service_check | 
 | function init_service_check { | 
 |     SCREEN_NAME=${SCREEN_NAME:-stack} | 
 |     SERVICE_DIR=${SERVICE_DIR:-${DEST}/status} | 
 |  | 
 |     if [[ ! -d "$SERVICE_DIR/$SCREEN_NAME" ]]; then | 
 |         mkdir -p "$SERVICE_DIR/$SCREEN_NAME" | 
 |     fi | 
 |  | 
 |     rm -f "$SERVICE_DIR/$SCREEN_NAME"/*.failure | 
 | } | 
 |  | 
 | # Find out if a process exists by partial name. | 
 | # is_running name | 
 | function is_running { | 
 |     local name=$1 | 
 |     ps auxw | grep -v grep | grep ${name} > /dev/null | 
 |     local exitcode=$? | 
 |     # some times I really hate bash reverse binary logic | 
 |     return $exitcode | 
 | } | 
 |  | 
 | # Run a single service under screen or directly | 
 | # If the command includes shell metachatacters (;<>*) it must be run using a shell | 
 | # If an optional group is provided sg will be used to run the | 
 | # command as that group. | 
 | # Uses globals ``USE_SCREEN`` | 
 | # run_process service "command-line" [group] | 
 | function run_process { | 
 |     local service=$1 | 
 |     local command="$2" | 
 |     local group=$3 | 
 |     local subservice=$4 | 
 |  | 
 |     local name=${subservice:-$service} | 
 |  | 
 |     time_start "run_process" | 
 |     if is_service_enabled $service; then | 
 |         if [[ "$USE_SCREEN" = "True" ]]; then | 
 |             screen_process "$name" "$command" "$group" | 
 |         else | 
 |             # Spawn directly without screen | 
 |             _run_process "$name" "$command" "$group" & | 
 |         fi | 
 |     fi | 
 |     time_stop "run_process" | 
 | } | 
 |  | 
 | # Helper to launch a process in a named screen | 
 | # Uses globals ``CURRENT_LOG_TIME``, ```LOGDIR``, ``SCREEN_LOGDIR``, `SCREEN_NAME``, | 
 | # ``SERVICE_DIR``, ``SCREEN_IS_LOGGING`` | 
 | # screen_process name "command-line" [group] | 
 | # Run a command in a shell in a screen window, if an optional group | 
 | # is provided, use sg to set the group of the command. | 
 | function screen_process { | 
 |     local name=$1 | 
 |     local command="$2" | 
 |     local group=$3 | 
 |  | 
 |     SCREEN_NAME=${SCREEN_NAME:-stack} | 
 |     SERVICE_DIR=${SERVICE_DIR:-${DEST}/status} | 
 |  | 
 |     screen -S $SCREEN_NAME -X screen -t $name | 
 |  | 
 |     local logfile="${name}.log.${CURRENT_LOG_TIME}" | 
 |     local real_logfile="${LOGDIR}/${logfile}" | 
 |     echo "LOGDIR: $LOGDIR" | 
 |     echo "SCREEN_LOGDIR: $SCREEN_LOGDIR" | 
 |     echo "log: $real_logfile" | 
 |     if [[ -n ${LOGDIR} ]]; then | 
 |         if [[ "$SCREEN_IS_LOGGING" == "True" ]]; then | 
 |             screen -S $SCREEN_NAME -p $name -X logfile "$real_logfile" | 
 |             screen -S $SCREEN_NAME -p $name -X log on | 
 |         fi | 
 |         # If logging isn't active then avoid a broken symlink | 
 |         touch "$real_logfile" | 
 |         bash -c "cd '$LOGDIR' && ln -sf '$logfile' ${name}.log" | 
 |         if [[ -n ${SCREEN_LOGDIR} ]]; then | 
 |             # Drop the backward-compat symlink | 
 |             ln -sf "$real_logfile" ${SCREEN_LOGDIR}/screen-${1}.log | 
 |         fi | 
 |     fi | 
 |  | 
 |     # sleep to allow bash to be ready to be send the command - we are | 
 |     # creating a new window in screen and then sends characters, so if | 
 |     # bash isn't running by the time we send the command, nothing | 
 |     # happens.  This sleep was added originally to handle gate runs | 
 |     # where we needed this to be at least 3 seconds to pass | 
 |     # consistently on slow clouds. Now this is configurable so that we | 
 |     # can determine a reasonable value for the local case which should | 
 |     # be much smaller. | 
 |     sleep ${SCREEN_SLEEP:-3} | 
 |  | 
 |     NL=`echo -ne '\015'` | 
 |     # This fun command does the following: | 
 |     # - the passed server command is backgrounded | 
 |     # - the pid of the background process is saved in the usual place | 
 |     # - the server process is brought back to the foreground | 
 |     # - if the server process exits prematurely the fg command errors | 
 |     # and a message is written to stdout and the process failure file | 
 |     # | 
 |     # The pid saved can be used in stop_process() as a process group | 
 |     # id to kill off all child processes | 
 |     if [[ -n "$group" ]]; then | 
 |         command="sg $group '$command'" | 
 |     fi | 
 |  | 
 |     # Append the process to the screen rc file | 
 |     screen_rc "$name" "$command" | 
 |  | 
 |     screen -S $SCREEN_NAME -p $name -X stuff "$command & echo \$! >$SERVICE_DIR/$SCREEN_NAME/${name}.pid; fg || echo \"$name failed to start\" | tee \"$SERVICE_DIR/$SCREEN_NAME/${name}.failure\"$NL" | 
 | } | 
 |  | 
 | # Screen rc file builder | 
 | # Uses globals ``SCREEN_NAME``, ``SCREENRC``, ``SCREEN_IS_LOGGING`` | 
 | # screen_rc service "command-line" | 
 | function screen_rc { | 
 |     SCREEN_NAME=${SCREEN_NAME:-stack} | 
 |     SCREENRC=$TOP_DIR/$SCREEN_NAME-screenrc | 
 |     if [[ ! -e $SCREENRC ]]; then | 
 |         # Name the screen session | 
 |         echo "sessionname $SCREEN_NAME" > $SCREENRC | 
 |         # Set a reasonable statusbar | 
 |         echo "hardstatus alwayslastline '$SCREEN_HARDSTATUS'" >> $SCREENRC | 
 |         # Some distributions override PROMPT_COMMAND for the screen terminal type - turn that off | 
 |         echo "setenv PROMPT_COMMAND /bin/true" >> $SCREENRC | 
 |         echo "screen -t shell bash" >> $SCREENRC | 
 |     fi | 
 |     # If this service doesn't already exist in the screenrc file | 
 |     if ! grep $1 $SCREENRC 2>&1 > /dev/null; then | 
 |         NL=`echo -ne '\015'` | 
 |         echo "screen -t $1 bash" >> $SCREENRC | 
 |         echo "stuff \"$2$NL\"" >> $SCREENRC | 
 |  | 
 |         if [[ -n ${LOGDIR} ]] && [[ "$SCREEN_IS_LOGGING" == "True" ]]; then | 
 |             echo "logfile ${LOGDIR}/${1}.log.${CURRENT_LOG_TIME}" >>$SCREENRC | 
 |             echo "log on" >>$SCREENRC | 
 |         fi | 
 |     fi | 
 | } | 
 |  | 
 | # Stop a service in screen | 
 | # If a PID is available use it, kill the whole process group via TERM | 
 | # If screen is being used kill the screen window; this will catch processes | 
 | # that did not leave a PID behind | 
 | # Uses globals ``SCREEN_NAME``, ``SERVICE_DIR`` | 
 | # screen_stop_service service | 
 | function screen_stop_service { | 
 |     local service=$1 | 
 |  | 
 |     SCREEN_NAME=${SCREEN_NAME:-stack} | 
 |     SERVICE_DIR=${SERVICE_DIR:-${DEST}/status} | 
 |  | 
 |     if is_service_enabled $service; then | 
 |         # Clean up the screen window | 
 |         screen -S $SCREEN_NAME -p $service -X kill || true | 
 |     fi | 
 | } | 
 |  | 
 | # Stop a service process | 
 | # If a PID is available use it, kill the whole process group via TERM | 
 | # If screen is being used kill the screen window; this will catch processes | 
 | # that did not leave a PID behind | 
 | # Uses globals ``SERVICE_DIR``, ``USE_SCREEN`` | 
 | # stop_process service | 
 | function stop_process { | 
 |     local service=$1 | 
 |  | 
 |     SERVICE_DIR=${SERVICE_DIR:-${DEST}/status} | 
 |  | 
 |     if is_service_enabled $service; then | 
 |         # Kill via pid if we have one available | 
 |         if [[ -r $SERVICE_DIR/$SCREEN_NAME/$service.pid ]]; then | 
 |             pkill -g $(cat $SERVICE_DIR/$SCREEN_NAME/$service.pid) | 
 |             # oslo.service tends to stop actually shutting down | 
 |             # reliably in between releases because someone believes it | 
 |             # is dying too early due to some inflight work they | 
 |             # have. This is a tension. It happens often enough we're | 
 |             # going to just account for it in devstack and assume it | 
 |             # doesn't work. | 
 |             # | 
 |             # Set OSLO_SERVICE_WORKS=True to skip this block | 
 |             if [[ -z "$OSLO_SERVICE_WORKS" ]]; then | 
 |                 # TODO(danms): Remove this double-kill when we have | 
 |                 # this fixed in all services: | 
 |                 # https://bugs.launchpad.net/oslo-incubator/+bug/1446583 | 
 |                 sleep 1 | 
 |                 # /bin/true because pkill on a non existent process returns an error | 
 |                 pkill -g $(cat $SERVICE_DIR/$SCREEN_NAME/$service.pid) || /bin/true | 
 |             fi | 
 |             rm $SERVICE_DIR/$SCREEN_NAME/$service.pid | 
 |         fi | 
 |         if [[ "$USE_SCREEN" = "True" ]]; then | 
 |             # Clean up the screen window | 
 |             screen_stop_service $service | 
 |         fi | 
 |     fi | 
 | } | 
 |  | 
 | # Helper to get the status of each running service | 
 | # Uses globals ``SCREEN_NAME``, ``SERVICE_DIR`` | 
 | # service_check | 
 | function service_check { | 
 |     local service | 
 |     local failures | 
 |     SCREEN_NAME=${SCREEN_NAME:-stack} | 
 |     SERVICE_DIR=${SERVICE_DIR:-${DEST}/status} | 
 |  | 
 |  | 
 |     if [[ ! -d "$SERVICE_DIR/$SCREEN_NAME" ]]; then | 
 |         echo "No service status directory found" | 
 |         return | 
 |     fi | 
 |  | 
 |     # Check if there is any failure flag file under $SERVICE_DIR/$SCREEN_NAME | 
 |     # make this -o errexit safe | 
 |     failures=`ls "$SERVICE_DIR/$SCREEN_NAME"/*.failure 2>/dev/null || /bin/true` | 
 |  | 
 |     for service in $failures; do | 
 |         service=`basename $service` | 
 |         service=${service%.failure} | 
 |         echo "Error: Service $service is not running" | 
 |     done | 
 |  | 
 |     if [ -n "$failures" ]; then | 
 |         die $LINENO "More details about the above errors can be found with screen" | 
 |     fi | 
 | } | 
 |  | 
 | # Tail a log file in a screen if USE_SCREEN is true. | 
 | # Uses globals ``USE_SCREEN`` | 
 | function tail_log { | 
 |     local name=$1 | 
 |     local logfile=$2 | 
 |  | 
 |     if [[ "$USE_SCREEN" = "True" ]]; then | 
 |         screen_process "$name" "sudo tail -f $logfile" | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # Deprecated Functions | 
 | # -------------------- | 
 |  | 
 | # _old_run_process() is designed to be backgrounded by old_run_process() to simulate a | 
 | # fork.  It includes the dirty work of closing extra filehandles and preparing log | 
 | # files to produce the same logs as screen_it().  The log filename is derived | 
 | # from the service name and global-and-now-misnamed ``SCREEN_LOGDIR`` | 
 | # Uses globals ``CURRENT_LOG_TIME``, ``SCREEN_LOGDIR``, ``SCREEN_NAME``, ``SERVICE_DIR`` | 
 | # _old_run_process service "command-line" | 
 | function _old_run_process { | 
 |     local service=$1 | 
 |     local command="$2" | 
 |  | 
 |     # Undo logging redirections and close the extra descriptors | 
 |     exec 1>&3 | 
 |     exec 2>&3 | 
 |     exec 3>&- | 
 |     exec 6>&- | 
 |  | 
 |     if [[ -n ${SCREEN_LOGDIR} ]]; then | 
 |         exec 1>&${SCREEN_LOGDIR}/screen-${1}.log.${CURRENT_LOG_TIME} 2>&1 | 
 |         ln -sf ${SCREEN_LOGDIR}/screen-${1}.log.${CURRENT_LOG_TIME} ${SCREEN_LOGDIR}/screen-${1}.log | 
 |  | 
 |         # TODO(dtroyer): Hack to get stdout from the Python interpreter for the logs. | 
 |         export PYTHONUNBUFFERED=1 | 
 |     fi | 
 |  | 
 |     exec /bin/bash -c "$command" | 
 |     die "$service exec failure: $command" | 
 | } | 
 |  | 
 | # old_run_process() launches a child process that closes all file descriptors and | 
 | # then exec's the passed in command.  This is meant to duplicate the semantics | 
 | # of screen_it() without screen.  PIDs are written to | 
 | # ``$SERVICE_DIR/$SCREEN_NAME/$service.pid`` by the spawned child process. | 
 | # old_run_process service "command-line" | 
 | function old_run_process { | 
 |     local service=$1 | 
 |     local command="$2" | 
 |  | 
 |     # Spawn the child process | 
 |     _old_run_process "$service" "$command" & | 
 |     echo $! | 
 | } | 
 |  | 
 | # Compatibility for existing start_XXXX() functions | 
 | # Uses global ``USE_SCREEN`` | 
 | # screen_it service "command-line" | 
 | function screen_it { | 
 |     if is_service_enabled $1; then | 
 |         # Append the service to the screen rc file | 
 |         screen_rc "$1" "$2" | 
 |  | 
 |         if [[ "$USE_SCREEN" = "True" ]]; then | 
 |             screen_process "$1" "$2" | 
 |         else | 
 |             # Spawn directly without screen | 
 |             old_run_process "$1" "$2" >$SERVICE_DIR/$SCREEN_NAME/$1.pid | 
 |         fi | 
 |     fi | 
 | } | 
 |  | 
 | # Compatibility for existing stop_XXXX() functions | 
 | # Stop a service in screen | 
 | # If a PID is available use it, kill the whole process group via TERM | 
 | # If screen is being used kill the screen window; this will catch processes | 
 | # that did not leave a PID behind | 
 | # screen_stop service | 
 | function screen_stop { | 
 |     # Clean up the screen window | 
 |     stop_process $1 | 
 | } | 
 |  | 
 |  | 
 | # Plugin Functions | 
 | # ================= | 
 |  | 
 | DEVSTACK_PLUGINS=${DEVSTACK_PLUGINS:-""} | 
 |  | 
 | # enable_plugin <name> <url> [branch] | 
 | # | 
 | # ``name`` is an arbitrary name - (aka: glusterfs, nova-docker, zaqar) | 
 | # ``url`` is a git url | 
 | # ``branch`` is a gitref. If it's not set, defaults to master | 
 | function enable_plugin { | 
 |     local name=$1 | 
 |     local url=$2 | 
 |     local branch=${3:-master} | 
 |     DEVSTACK_PLUGINS+=",$name" | 
 |     GITREPO[$name]=$url | 
 |     GITDIR[$name]=$DEST/$name | 
 |     GITBRANCH[$name]=$branch | 
 | } | 
 |  | 
 | # fetch_plugins | 
 | # | 
 | # clones all plugins | 
 | function fetch_plugins { | 
 |     local plugins="${DEVSTACK_PLUGINS}" | 
 |     local plugin | 
 |  | 
 |     # short circuit if nothing to do | 
 |     if [[ -z $plugins ]]; then | 
 |         return | 
 |     fi | 
 |  | 
 |     echo "Fetching DevStack plugins" | 
 |     for plugin in ${plugins//,/ }; do | 
 |         git_clone_by_name $plugin | 
 |     done | 
 | } | 
 |  | 
 | # load_plugin_settings | 
 | # | 
 | # Load settings from plugins in the order that they were registered | 
 | function load_plugin_settings { | 
 |     local plugins="${DEVSTACK_PLUGINS}" | 
 |     local plugin | 
 |  | 
 |     # short circuit if nothing to do | 
 |     if [[ -z $plugins ]]; then | 
 |         return | 
 |     fi | 
 |  | 
 |     echo "Loading plugin settings" | 
 |     for plugin in ${plugins//,/ }; do | 
 |         local dir=${GITDIR[$plugin]} | 
 |         # source any known settings | 
 |         if [[ -f $dir/devstack/settings ]]; then | 
 |             source $dir/devstack/settings | 
 |         fi | 
 |     done | 
 | } | 
 |  | 
 | # plugin_override_defaults | 
 | # | 
 | # Run an extremely early setting phase for plugins that allows default | 
 | # overriding of services. | 
 | function plugin_override_defaults { | 
 |     local plugins="${DEVSTACK_PLUGINS}" | 
 |     local plugin | 
 |  | 
 |     # short circuit if nothing to do | 
 |     if [[ -z $plugins ]]; then | 
 |         return | 
 |     fi | 
 |  | 
 |     echo "Overriding Configuration Defaults" | 
 |     for plugin in ${plugins//,/ }; do | 
 |         local dir=${GITDIR[$plugin]} | 
 |         # source any overrides | 
 |         if [[ -f $dir/devstack/override-defaults ]]; then | 
 |             # be really verbose that an override is happening, as it | 
 |             # may not be obvious if things fail later. | 
 |             echo "$plugin has overridden the following defaults" | 
 |             cat $dir/devstack/override-defaults | 
 |             source $dir/devstack/override-defaults | 
 |         fi | 
 |     done | 
 | } | 
 |  | 
 | # run_plugins | 
 | # | 
 | # Run the devstack/plugin.sh in all the plugin directories. These are | 
 | # run in registration order. | 
 | function run_plugins { | 
 |     local mode=$1 | 
 |     local phase=$2 | 
 |  | 
 |     local plugins="${DEVSTACK_PLUGINS}" | 
 |     local plugin | 
 |     for plugin in ${plugins//,/ }; do | 
 |         local dir=${GITDIR[$plugin]} | 
 |         if [[ -f $dir/devstack/plugin.sh ]]; then | 
 |             source $dir/devstack/plugin.sh $mode $phase | 
 |         fi | 
 |     done | 
 | } | 
 |  | 
 | function run_phase { | 
 |     local mode=$1 | 
 |     local phase=$2 | 
 |     if [[ -d $TOP_DIR/extras.d ]]; then | 
 |         local extra_plugin_file_name | 
 |         for extra_plugin_file_name in $TOP_DIR/extras.d/*.sh; do | 
 |             # NOTE(sdague): only process extras.d for the 3 explicitly | 
 |             # white listed elements in tree. We want these to move out | 
 |             # over time as well, but they are in tree, so we need to | 
 |             # manage that. | 
 |             local exceptions="60-ceph.sh 80-tempest.sh" | 
 |             local extra | 
 |             extra=$(basename $extra_plugin_file_name) | 
 |             if [[ ! ( $exceptions =~ "$extra" ) ]]; then | 
 |                 warn "use of extras.d is no longer supported" | 
 |                 warn "processing of project $extra is skipped" | 
 |             else | 
 |                 [[ -r $extra_plugin_file_name ]] && source $extra_plugin_file_name $mode $phase | 
 |             fi | 
 |         done | 
 |     fi | 
 |     # the source phase corresponds to settings loading in plugins | 
 |     if [[ "$mode" == "source" ]]; then | 
 |         load_plugin_settings | 
 |         verify_disabled_services | 
 |     elif [[ "$mode" == "override_defaults" ]]; then | 
 |         plugin_override_defaults | 
 |     else | 
 |         run_plugins $mode $phase | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # Service Functions | 
 | # ================= | 
 |  | 
 | # remove extra commas from the input string (i.e. ``ENABLED_SERVICES``) | 
 | # _cleanup_service_list service-list | 
 | function _cleanup_service_list { | 
 |     local xtrace | 
 |     xtrace=$(set +o | grep xtrace) | 
 |     set +o xtrace | 
 |  | 
 |     echo "$1" | sed -e ' | 
 |         s/,,/,/g; | 
 |         s/^,//; | 
 |         s/,$// | 
 |     ' | 
 |  | 
 |     $xtrace | 
 | } | 
 |  | 
 | # disable_all_services() removes all current services | 
 | # from ``ENABLED_SERVICES`` to reset the configuration | 
 | # before a minimal installation | 
 | # Uses global ``ENABLED_SERVICES`` | 
 | # disable_all_services | 
 | function disable_all_services { | 
 |     ENABLED_SERVICES="" | 
 | } | 
 |  | 
 | # Remove all services starting with '-'.  For example, to install all default | 
 | # services except rabbit (rabbit) set in ``localrc``: | 
 | # ENABLED_SERVICES+=",-rabbit" | 
 | # Uses global ``ENABLED_SERVICES`` | 
 | # disable_negated_services | 
 | function disable_negated_services { | 
 |     local xtrace | 
 |     xtrace=$(set +o | grep xtrace) | 
 |     set +o xtrace | 
 |  | 
 |     local to_remove="" | 
 |     local remaining="" | 
 |     local service | 
 |  | 
 |     # build up list of services that should be removed; i.e. they | 
 |     # begin with "-" | 
 |     for service in ${ENABLED_SERVICES//,/ }; do | 
 |         if [[ ${service} == -* ]]; then | 
 |             to_remove+=",${service#-}" | 
 |         else | 
 |             remaining+=",${service}" | 
 |         fi | 
 |     done | 
 |  | 
 |     # go through the service list.  if this service appears in the "to | 
 |     # be removed" list, drop it | 
 |     ENABLED_SERVICES=$(remove_disabled_services "$remaining" "$to_remove") | 
 |  | 
 |     $xtrace | 
 | } | 
 |  | 
 | # disable_service() prepares the services passed as argument to be | 
 | # removed from the ``ENABLED_SERVICES`` list, if they are present. | 
 | # | 
 | # For example: | 
 | #   disable_service rabbit | 
 | # | 
 | # Uses global ``DISABLED_SERVICES`` | 
 | # disable_service service [service ...] | 
 | function disable_service { | 
 |     local xtrace | 
 |     xtrace=$(set +o | grep xtrace) | 
 |     set +o xtrace | 
 |  | 
 |     local disabled_svcs="${DISABLED_SERVICES}" | 
 |     local enabled_svcs=",${ENABLED_SERVICES}," | 
 |     local service | 
 |     for service in $@; do | 
 |         disabled_svcs+=",$service" | 
 |         if is_service_enabled $service; then | 
 |             enabled_svcs=${enabled_svcs//,$service,/,} | 
 |         fi | 
 |     done | 
 |     DISABLED_SERVICES=$(_cleanup_service_list "$disabled_svcs") | 
 |     ENABLED_SERVICES=$(_cleanup_service_list "$enabled_svcs") | 
 |  | 
 |     $xtrace | 
 | } | 
 |  | 
 | # enable_service() adds the services passed as argument to the | 
 | # ``ENABLED_SERVICES`` list, if they are not already present. | 
 | # | 
 | # For example: | 
 | #   enable_service q-svc | 
 | # | 
 | # This function does not know about the special cases | 
 | # for nova, glance, and neutron built into is_service_enabled(). | 
 | # Uses global ``ENABLED_SERVICES`` | 
 | # enable_service service [service ...] | 
 | function enable_service { | 
 |     local xtrace | 
 |     xtrace=$(set +o | grep xtrace) | 
 |     set +o xtrace | 
 |  | 
 |     local tmpsvcs="${ENABLED_SERVICES}" | 
 |     local service | 
 |     for service in $@; do | 
 |         if [[ ,${DISABLED_SERVICES}, =~ ,${service}, ]]; then | 
 |             warn $LINENO "Attempt to enable_service ${service} when it has been disabled" | 
 |             continue | 
 |         fi | 
 |         if ! is_service_enabled $service; then | 
 |             tmpsvcs+=",$service" | 
 |         fi | 
 |     done | 
 |     ENABLED_SERVICES=$(_cleanup_service_list "$tmpsvcs") | 
 |     disable_negated_services | 
 |  | 
 |     $xtrace | 
 | } | 
 |  | 
 | # is_service_enabled() checks if the service(s) specified as arguments are | 
 | # enabled by the user in ``ENABLED_SERVICES``. | 
 | # | 
 | # Multiple services specified as arguments are ``OR``'ed together; the test | 
 | # is a short-circuit boolean, i.e it returns on the first match. | 
 | # | 
 | # There are special cases for some 'catch-all' services:: | 
 | #   **nova** returns true if any service enabled start with **n-** | 
 | #   **cinder** returns true if any service enabled start with **c-** | 
 | #   **glance** returns true if any service enabled start with **g-** | 
 | #   **neutron** returns true if any service enabled start with **q-** | 
 | #   **swift** returns true if any service enabled start with **s-** | 
 | #   **trove** returns true if any service enabled start with **tr-** | 
 | #   For backward compatibility if we have **swift** in ENABLED_SERVICES all the | 
 | #   **s-** services will be enabled. This will be deprecated in the future. | 
 | # | 
 | # Cells within nova is enabled if **n-cell** is in ``ENABLED_SERVICES``. | 
 | # We also need to make sure to treat **n-cell-region** and **n-cell-child** | 
 | # as enabled in this case. | 
 | # | 
 | # Uses global ``ENABLED_SERVICES`` | 
 | # is_service_enabled service [service ...] | 
 | function is_service_enabled { | 
 |     local xtrace | 
 |     xtrace=$(set +o | grep xtrace) | 
 |     set +o xtrace | 
 |  | 
 |     local enabled=1 | 
 |     local services=$@ | 
 |     local service | 
 |     for service in ${services}; do | 
 |         [[ ,${ENABLED_SERVICES}, =~ ,${service}, ]] && enabled=0 | 
 |  | 
 |         # Look for top-level 'enabled' function for this service | 
 |         if type is_${service}_enabled >/dev/null 2>&1; then | 
 |             # A function exists for this service, use it | 
 |             is_${service}_enabled && enabled=0 | 
 |         fi | 
 |  | 
 |         # TODO(dtroyer): Remove these legacy special-cases after the is_XXX_enabled() | 
 |         #                are implemented | 
 |  | 
 |         [[ ${service} == n-cell-* && ${ENABLED_SERVICES} =~ "n-cell" ]] && enabled=0 | 
 |         [[ ${service} == n-cpu-* && ${ENABLED_SERVICES} =~ "n-cpu" ]] && enabled=0 | 
 |         [[ ${service} == "nova" && ${ENABLED_SERVICES} =~ "n-" ]] && enabled=0 | 
 |         [[ ${service} == "glance" && ${ENABLED_SERVICES} =~ "g-" ]] && enabled=0 | 
 |         [[ ${service} == "neutron" && ${ENABLED_SERVICES} =~ "q-" ]] && enabled=0 | 
 |         [[ ${service} == "trove" && ${ENABLED_SERVICES} =~ "tr-" ]] && enabled=0 | 
 |         [[ ${service} == "swift" && ${ENABLED_SERVICES} =~ "s-" ]] && enabled=0 | 
 |         [[ ${service} == s-* && ${ENABLED_SERVICES} =~ "swift" ]] && enabled=0 | 
 |     done | 
 |  | 
 |     $xtrace | 
 |     return $enabled | 
 | } | 
 |  | 
 | # remove specified list from the input string | 
 | # remove_disabled_services service-list remove-list | 
 | function remove_disabled_services { | 
 |     local xtrace | 
 |     xtrace=$(set +o | grep xtrace) | 
 |     set +o xtrace | 
 |  | 
 |     local service_list=$1 | 
 |     local remove_list=$2 | 
 |     local service | 
 |     local enabled="" | 
 |  | 
 |     for service in ${service_list//,/ }; do | 
 |         local remove | 
 |         local add=1 | 
 |         for remove in ${remove_list//,/ }; do | 
 |             if [[ ${remove} == ${service} ]]; then | 
 |                 add=0 | 
 |                 break | 
 |             fi | 
 |         done | 
 |         if [[ $add == 1 ]]; then | 
 |             enabled="${enabled},$service" | 
 |         fi | 
 |     done | 
 |  | 
 |     $xtrace | 
 |  | 
 |     _cleanup_service_list "$enabled" | 
 | } | 
 |  | 
 | # Toggle enable/disable_service for services that must run exclusive of each other | 
 | #  $1 The name of a variable containing a space-separated list of services | 
 | #  $2 The name of a variable in which to store the enabled service's name | 
 | #  $3 The name of the service to enable | 
 | function use_exclusive_service { | 
 |     local options=${!1} | 
 |     local selection=$3 | 
 |     local out=$2 | 
 |     [ -z $selection ] || [[ ! "$options" =~ "$selection" ]] && return 1 | 
 |     local opt | 
 |     for opt in $options;do | 
 |         [[ "$opt" = "$selection" ]] && enable_service $opt || disable_service $opt | 
 |     done | 
 |     eval "$out=$selection" | 
 |     return 0 | 
 | } | 
 |  | 
 | # Make sure that nothing has manipulated ENABLED_SERVICES in a way | 
 | # that conflicts with prior calls to disable_service. | 
 | # Uses global ``ENABLED_SERVICES`` | 
 | function verify_disabled_services { | 
 |     local service | 
 |     for service in ${ENABLED_SERVICES//,/ }; do | 
 |         if [[ ,${DISABLED_SERVICES}, =~ ,${service}, ]]; then | 
 |             die $LINENO "ENABLED_SERVICES directly modified to overcome 'disable_service ${service}'" | 
 |         fi | 
 |     done | 
 | } | 
 |  | 
 |  | 
 | # System Functions | 
 | # ================ | 
 |  | 
 | # Only run the command if the target file (the last arg) is not on an | 
 | # NFS filesystem. | 
 | function _safe_permission_operation { | 
 |     local xtrace | 
 |     xtrace=$(set +o | grep xtrace) | 
 |     set +o xtrace | 
 |     local args=( $@ ) | 
 |     local last | 
 |     local sudo_cmd | 
 |     local dir_to_check | 
 |  | 
 |     let last="${#args[*]} - 1" | 
 |  | 
 |     local dir_to_check=${args[$last]} | 
 |     if [ ! -d "$dir_to_check" ]; then | 
 |         dir_to_check=`dirname "$dir_to_check"` | 
 |     fi | 
 |  | 
 |     if is_nfs_directory "$dir_to_check" ; then | 
 |         $xtrace | 
 |         return 0 | 
 |     fi | 
 |  | 
 |     if [[ $TRACK_DEPENDS = True ]]; then | 
 |         sudo_cmd="env" | 
 |     else | 
 |         sudo_cmd="sudo" | 
 |     fi | 
 |  | 
 |     $xtrace | 
 |     $sudo_cmd $@ | 
 | } | 
 |  | 
 | # Exit 0 if address is in network or 1 if address is not in network | 
 | # ip-range is in CIDR notation: 1.2.3.4/20 | 
 | # address_in_net ip-address ip-range | 
 | function address_in_net { | 
 |     local ip=$1 | 
 |     local range=$2 | 
 |     local masklen=${range#*/} | 
 |     local network | 
 |     network=$(maskip ${range%/*} $(cidr2netmask $masklen)) | 
 |     local subnet | 
 |     subnet=$(maskip $ip $(cidr2netmask $masklen)) | 
 |     [[ $network == $subnet ]] | 
 | } | 
 |  | 
 | # Add a user to a group. | 
 | # add_user_to_group user group | 
 | function add_user_to_group { | 
 |     local user=$1 | 
 |     local group=$2 | 
 |  | 
 |     sudo usermod -a -G "$group" "$user" | 
 | } | 
 |  | 
 | # Convert CIDR notation to a IPv4 netmask | 
 | # cidr2netmask cidr-bits | 
 | function cidr2netmask { | 
 |     local maskpat="255 255 255 255" | 
 |     local maskdgt="254 252 248 240 224 192 128" | 
 |     set -- ${maskpat:0:$(( ($1 / 8) * 4 ))}${maskdgt:$(( (7 - ($1 % 8)) * 4 )):3} | 
 |     echo ${1-0}.${2-0}.${3-0}.${4-0} | 
 | } | 
 |  | 
 | # Gracefully cp only if source file/dir exists | 
 | # cp_it source destination | 
 | function cp_it { | 
 |     if [ -e $1 ] || [ -d $1 ]; then | 
 |         cp -pRL $1 $2 | 
 |     fi | 
 | } | 
 |  | 
 | # HTTP and HTTPS proxy servers are supported via the usual environment variables [1] | 
 | # ``http_proxy``, ``https_proxy`` and ``no_proxy``. They can be set in | 
 | # ``localrc`` or on the command line if necessary:: | 
 | # | 
 | # [1] http://www.w3.org/Daemon/User/Proxies/ProxyClients.html | 
 | # | 
 | #     http_proxy=http://proxy.example.com:3128/ no_proxy=repo.example.net ./stack.sh | 
 |  | 
 | function export_proxy_variables { | 
 |     if isset http_proxy ; then | 
 |         export http_proxy=$http_proxy | 
 |     fi | 
 |     if isset https_proxy ; then | 
 |         export https_proxy=$https_proxy | 
 |     fi | 
 |     if isset no_proxy ; then | 
 |         export no_proxy=$no_proxy | 
 |     fi | 
 | } | 
 |  | 
 | # Returns true if the directory is on a filesystem mounted via NFS. | 
 | function is_nfs_directory { | 
 |     local mount_type | 
 |     mount_type=`stat -f -L -c %T $1` | 
 |     test "$mount_type" == "nfs" | 
 | } | 
 |  | 
 | # Return the network portion of the given IP address using netmask | 
 | # netmask is in the traditional dotted-quad format | 
 | # maskip ip-address netmask | 
 | function maskip { | 
 |     local ip=$1 | 
 |     local mask=$2 | 
 |     local l="${ip%.*}"; local r="${ip#*.}"; local n="${mask%.*}"; local m="${mask#*.}" | 
 |     local subnet | 
 |     subnet=$((${ip%%.*}&${mask%%.*})).$((${r%%.*}&${m%%.*})).$((${l##*.}&${n##*.})).$((${ip##*.}&${mask##*.})) | 
 |     echo $subnet | 
 | } | 
 |  | 
 | # Return the current python as "python<major>.<minor>" | 
 | function python_version { | 
 |     local python_version | 
 |     python_version=$(python -c 'import sys; print("%s.%s" % sys.version_info[0:2])') | 
 |     echo "python${python_version}" | 
 | } | 
 |  | 
 | # Service wrapper to restart services | 
 | # restart_service service-name | 
 | function restart_service { | 
 |     if is_ubuntu; then | 
 |         sudo /usr/sbin/service $1 restart | 
 |     else | 
 |         sudo /sbin/service $1 restart | 
 |     fi | 
 | } | 
 |  | 
 | # Only change permissions of a file or directory if it is not on an | 
 | # NFS filesystem. | 
 | function safe_chmod { | 
 |     _safe_permission_operation chmod $@ | 
 | } | 
 |  | 
 | # Only change ownership of a file or directory if it is not on an NFS | 
 | # filesystem. | 
 | function safe_chown { | 
 |     _safe_permission_operation chown $@ | 
 | } | 
 |  | 
 | # Service wrapper to start services | 
 | # start_service service-name | 
 | function start_service { | 
 |     if is_ubuntu; then | 
 |         sudo /usr/sbin/service $1 start | 
 |     else | 
 |         sudo /sbin/service $1 start | 
 |     fi | 
 | } | 
 |  | 
 | # Service wrapper to stop services | 
 | # stop_service service-name | 
 | function stop_service { | 
 |     if is_ubuntu; then | 
 |         sudo /usr/sbin/service $1 stop | 
 |     else | 
 |         sudo /sbin/service $1 stop | 
 |     fi | 
 | } | 
 |  | 
 | # Test with a finite retry loop. | 
 | # | 
 | function test_with_retry { | 
 |     local testcmd=$1 | 
 |     local failmsg=$2 | 
 |     local until=${3:-10} | 
 |     local sleep=${4:-0.5} | 
 |  | 
 |     time_start "test_with_retry" | 
 |     if ! timeout $until sh -c "while ! $testcmd; do sleep $sleep; done"; then | 
 |         die $LINENO "$failmsg" | 
 |     fi | 
 |     time_stop "test_with_retry" | 
 | } | 
 |  | 
 | # Like sudo but forwarding http_proxy https_proxy no_proxy environment vars. | 
 | # If it is run as superuser then sudo is replaced by env. | 
 | # | 
 | function sudo_with_proxies { | 
 |     local sudo | 
 |  | 
 |     [[ "$(id -u)" = "0" ]] && sudo="env" || sudo="sudo" | 
 |  | 
 |     $sudo http_proxy="${http_proxy:-}" https_proxy="${https_proxy:-}"\ | 
 |         no_proxy="${no_proxy:-}" "$@" | 
 | } | 
 |  | 
 | # Timing infrastructure - figure out where large blocks of time are | 
 | # used in DevStack | 
 | # | 
 | # The timing infrastructure for DevStack is about collecting buckets | 
 | # of time that are spend in some subtask. For instance, that might be | 
 | # 'apt', 'pip', 'osc', even database migrations. We do this by a pair | 
 | # of functions: time_start / time_stop. | 
 | # | 
 | # These take a single parameter: $name - which specifies the name of | 
 | # the bucket to be accounted against. time_totals function spits out | 
 | # the results. | 
 | # | 
 | # Resolution is only in whole seconds, so should be used for long | 
 | # running activities. | 
 |  | 
 | declare -A _TIME_TOTAL | 
 | declare -A _TIME_START | 
 | declare -r _TIME_BEGIN=$(date +%s) | 
 |  | 
 | # time_start $name | 
 | # | 
 | # starts the clock for a timer by name. Errors if that clock is | 
 | # already started. | 
 | function time_start { | 
 |     local name=$1 | 
 |     local start_time=${_TIME_START[$name]} | 
 |     if [[ -n "$start_time" ]]; then | 
 |         die $LINENO "Trying to start the clock on $name, but it's already been started" | 
 |     fi | 
 |     _TIME_START[$name]=$(date +%s) | 
 | } | 
 |  | 
 | # time_stop $name | 
 | # | 
 | # stops the clock for a timer by name, and accumulate that time in the | 
 | # global counter for that name. Errors if that clock had not | 
 | # previously been started. | 
 | function time_stop { | 
 |     local name | 
 |     local end_time | 
 |     local elpased_time | 
 |     local total | 
 |     local start_time | 
 |  | 
 |     name=$1 | 
 |     start_time=${_TIME_START[$name]} | 
 |  | 
 |     if [[ -z "$start_time" ]]; then | 
 |         die $LINENO "Trying to stop the clock on $name, but it was never started" | 
 |     fi | 
 |     end_time=$(date +%s) | 
 |     elapsed_time=$(($end_time - $start_time)) | 
 |     total=${_TIME_TOTAL[$name]:-0} | 
 |     # reset the clock so we can start it in the future | 
 |     _TIME_START[$name]="" | 
 |     _TIME_TOTAL[$name]=$(($total + $elapsed_time)) | 
 | } | 
 |  | 
 | # time_totals | 
 | #  Print out total time summary | 
 | function time_totals { | 
 |     local elapsed_time | 
 |     local end_time | 
 |     local len=15 | 
 |     local xtrace | 
 |  | 
 |     end_time=$(date +%s) | 
 |     elapsed_time=$(($end_time - $_TIME_BEGIN)) | 
 |  | 
 |     # pad 1st column this far | 
 |     for t in ${!_TIME_TOTAL[*]}; do | 
 |         if [[ ${#t} -gt $len ]]; then | 
 |             len=${#t} | 
 |         fi | 
 |     done | 
 |  | 
 |     xtrace=$(set +o | grep xtrace) | 
 |     set +o xtrace | 
 |  | 
 |     echo | 
 |     echo "=========================" | 
 |     echo "DevStack Component Timing" | 
 |     echo "=========================" | 
 |     printf "%-${len}s %3d\n" "Total runtime" "$elapsed_time" | 
 |     echo | 
 |     for t in ${!_TIME_TOTAL[*]}; do | 
 |         local v=${_TIME_TOTAL[$t]} | 
 |         printf "%-${len}s %3d\n" "$t" "$v" | 
 |     done | 
 |     echo "=========================" | 
 |  | 
 |     $xtrace | 
 | } | 
 |  | 
 | # Restore xtrace | 
 | $_XTRACE_FUNCTIONS_COMMON | 
 |  | 
 | # Local variables: | 
 | # mode: shell-script | 
 | # End: |