rjeffman: this is a fixup for infra/images/build.sh

This patch modifies the image building script by adding:

- An usage message.
- An option "-I" to NOT install IPA to the generated container.
- An opiton "-c NAME" to both set the name and use an existing container
  to ONLY install IPA.
- Rename "scenario" to "DISTRO" as "scenario" should be used for the
  container scenario usage, rather than the distro (I'll change the name
  also in the Azure scripts)
- Use 'log' (from shlog) to print messages.

infra/image/build.sh

@@ -3,55 +3,113 @@
 BASEDIR="$(readlink -f "$(dirname "$0")")"
 TOPDIR="$(readlink -f "${BASEDIR}/../..")"
 
-scenario=${1:-}
+. "${TOPDIR}/utils/shfun"
+
+valid_distro() {
+    find "${BASEDIR}/dockerfile" -printf "%f\n" | tr "\n" " "
+}
+
+usage() {
+    local prog="${0##*/}"
+    cat << EOF
+usage: ${prog} [-h] [i] DISTRO
+    ${prog} build a container image to test ansible-freeipa.
+EOF
+}
+
+help() {
+    cat << EOF
+positional arguments:
+
+    DISTRO    The base distro to build the test container.
+             Availble distros: $(valid_distro)
+
+optionol arguments:
+
+    -c CONTAINER     Use existing container CONTAINER as base.
+    -I               Do not install an IPA files on the container.
+                     (Implies -C)
+EOF
+}
+
 name="ansible-test"
 hostname="ipaserver.test.local"
 cpus="2"
 memory="4g"
+REBUILD="Y"
+INSTALL="Y"
 
-if [ -z "${scenario}" ]; then
-    echo "ERROR: Image needs to be given"
-    exit 1
-fi
-if [ ! -f "${BASEDIR}/dockerfile/${scenario}" ]; then
-    echo "ERROR: ${scenario} is not a valid image"
-    exit 1
+while getopts ":hc:CI" option
+do
+    case "${option}" in
+        h) help && exit 0 ;;
+        c) REBUILD="N" ; name="${OPTARG}" ;;
+        I) INSTALL="N" ;;
+        *) die -u "Invalid option: ${option}" ;;
+    esac
+done
+
+shift $((OPTIND - 1))
+DISTRO=${1:-}
+
+[ -n "${DISTRO}" ] || die "Distro needs to be given.\nUse one of: $(valid_distro)"
+
+[ -f "${BASEDIR}/dockerfile/${DISTRO}" ] \
+  || die "${DISTRO} is not a valid distro target.\nUse one of: $(valid_distro)"
+
+if [ "${INSTALL}" == "Y" ]
+then
+    [ -n "$(command -v "ansible-playbook")" ] || die "ansible-playbook is required to install FreeIPA."
+
+    deploy_playbook="${TOPDIR}/playbooks/install-server.yml"
+    [ -f "${deploy_playbook}" ] || die "Can't find playbook '${deploy_playbook}'"
+
+    inventory_file="${BASEDIR}/inventory"
+    [ -f "${inventory_file}" ] || die "Can't find inventory '${inventory_file}'"
 fi
 
-echo "= Cleanup possible existing ${scenario} ="
-podman image rm "${scenario}" --force
-echo
+container_state="$(podman ps -q --all --format "{{.State}}" --filter "name=${name}")"
 
-echo "= Building ${scenario} ="
-podman build -t "${scenario}" -f "${BASEDIR}/dockerfile/${scenario}" \
-       "${BASEDIR}"
-echo
+if [ "${REBUILD}" == "Y" ] || [ -z "${container_state}" ]
+then
+    log info "= Cleanup possible existing ${DISTRO} ="
+    podman image rm "${DISTRO}" --force
+    echo
 
-echo "= Creating ${name} ="
-podman create --privileged --name "${name}" --hostname "${hostname}" \
-       --network bridge:interface_name=eth0 --systemd true \
-       --cpus "${cpus}" --memory "${memory}" --memory-swap -1 --no-hosts \
-       --replace "${scenario}"
-echo
+    log info "= Building ${DISTRO} ="
+    podman build -t "${DISTRO}" -f "${BASEDIR}/dockerfile/${DISTRO}" \
+           "${BASEDIR}"
+    echo
 
-echo "= Starting ${name} ="
-podman start "${name}"
-echo
+    log info "= Creating ${name} ="
+    podman create --privileged --name "${name}" --hostname "${hostname}" \
+           --network bridge:interface_name=eth0 --systemd true \
+           --cpus "${cpus}" --memory "${memory}" --memory-swap -1 --no-hosts \
+           --replace "${DISTRO}"
+    echo
+fi
 
-echo "= Installing IPA ="
-ansible-playbook -i "${BASEDIR}/inventory" "${TOPDIR}/playbooks/install-server.yml"
+log info "= Starting ${name} ="
+[ "${container_state}" == "running" ] || podman start "${name}"
 echo
 
-echo "= Enabling additional services ="
-podman exec "${name}" systemctl enable fixnet
-podman exec "${name}" systemctl enable fixipaip
-echo
+if [ "${INSTALL}" == "Y" ]
+then
+    log info "= Installing IPA ="
+    ansible-playbook -i "${inventory_file}" "${deploy_playbook}"
+    echo
+
+    log info "= Enabling additional services ="
+    podman exec "${name}" systemctl enable fixnet
+    podman exec "${name}" systemctl enable fixipaip
+    echo
+fi
 
-echo "= Stopping ${name} ="
+log info "= Stopping container ${name} ="
 podman stop "${name}"
 echo
 
-echo "= DONE ="
+log info "= DONE: Image created. ="
 
 # For tests:
 # podman start "${name}"