305 lines
9.2 KiB
Bash
Executable File
305 lines
9.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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# shellcheck disable=SC1090,SC2004
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podmanRunEasy () {
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sourcePlugin "podman/podmanRunWrapper"
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########################
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####### DEFAULTS #######
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########################
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# Can be overridden using environment variables
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[[ -z $_image ]] && _image="fedora:latest"
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[[ -z $_mode ]] && _mode="ephemeral"
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[[ -z $_workdir ]] && _workdir="$PWD"
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_smartDefaults () {
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echo ""
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### UNDER CONSTRUCTION ###
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# I would like to handle some options automatically to reduce the number of configuration
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# options necessary to run podman and also make it easy for users to define defaults based
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# on file extension, command, shebang, etc
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# check the basename for defaults
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#[[ -z $COMMAND_DEF ]] \
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# && COMMAND_BASENAME="${COMMAND_ARR[0]##*/}" \
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# && _set_defaults "${COMMAND_BASENAME}"
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# check the extension for defaults
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#[[ -z $COMMAND_DEF ]] \
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# && COMMAND_EXT="${COMMAND_BASENAME##*.}" \
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# && _set_defaults "${COMMAND_EXT}"
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# add defaults to the string
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#if [[ -n $COMMAND_DEF ]]; then
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# [[ -z $_silent ]] && echo "Loaded command defaults, executing with \"${COMMAND_DEF}\""
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# COMMAND_STR="${COMMAND_DEF} ${COMMAND_STR}"
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#else
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# [[ -z $_silent ]] && echo "Could not find command defaults from name or extension"
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# [[ -z $_silent ]] && echo "Executing script directly"
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#fi
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}
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########################
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###### FUNCTIONS #######
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########################
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_printHelpAndExit () {
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cat <<-'EOF'
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USAGE
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podman-run-easy [-m _mode] [-w PATH] [-d PATH] [-i _image] [--systemd] [--mkexec] [--help]
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[--silent] [--debug] [COMMANDS [ARGS...]]
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COMMANDS
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COMMANDS to run in the container (e.g. the current active file, an external
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build script, a program residing in the container, etc.)
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Can be empty (default entrypoint)
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OPTIONS
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--mode, -m MODE
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MODE can be any of the following:
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1. ephemeral
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2. persistent
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3. recreate-persistent
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4. remove-persistent
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--workdir, -w PATH
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The directory in the container where we execute the COMMANDS
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Default: The present working directory
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--maskdir, -d PATH
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Hide this directory from the host OS, store contents in the container only
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--image, -i IMAGE
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IMAGE used to create the container
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Default: fedora:latest
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--mkexec, -x
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Makes the first argument of COMMANDS executable
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--name, -n CONTAINER_NAME
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This will form the base of the container name and should be unique to each project
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Default: Container name will be set based on a concatenation of the image and commands
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--systemd
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Force container to init with systemd (--systemd=always)
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Default: --systemd=true (systemd will only start if CMD is systemd, /usr/sbin/init or
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/sbin/init)
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--array, -a ARRAY
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Read arguments from an existing or new ARRAY (bash >= 4.3)
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This is useful to reduce parsing errors and recommended for build-wrapper plugins
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--silent, -s
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Don't output anything from this program (container output will still be passed to stdout
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if -it option is used instead of -d, see `man podman run` for more information)
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--help, -h
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Print this help message and exit (overrides --silent)
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EOF
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# Exit using passed exit code
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[[ -z $1 ]] && exit 0 || exit "$1"
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}
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_parseInput () {
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[[ -n $_debug ]] && echo "$@"
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# Unset array variable when reparsing array
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unset _array
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# Parse input and set switches using getopt
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if _input=$(getopt -o +m:w:d:i:a:n:xsh -l mode:,workdir:,maskdir:,image:,array:,name:,mkexec,systemd,silent,debug,help -- "$@"); then
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eval set -- "$_input"
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while true; do
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case "$1" in
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--mode|-m)
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shift
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_mode="$1"
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;;
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--workdir|-w)
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shift
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_workdir="$1"
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;;
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--maskdir|-d)
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shift
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_maskdir="$1"
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;;
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--image|-i)
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shift
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_image="$1"
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;;
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--name|-n)
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shift
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_name="$1"
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;;
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--array|-a)
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shift
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_array="$1"
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break
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;;
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--mkexec|-x)
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_mkexec="true"
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;;
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--systemd|-s)
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_systemd="true"
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;;
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--silent)
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_silent="true"
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;;
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--debug)
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_debug="true"
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echo "Debugging on!"
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;;
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--help|-h)
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_printHelpAndExit 0
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;;
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--)
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shift
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break
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;;
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esac
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shift
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done
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else
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echo "Incorrect options provided"
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_printHelpAndExit 1
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fi
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# If array mode, load input array, reparse input, and return
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if [[ -n $_array ]]; then
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checkBashVersion
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local _n_array
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declare -n _n_array="$_array"
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_parseInput "${_n_array[@]}"
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return
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fi
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# Create _pre_commands_array from remaining arguments
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# shift getopt parameters away
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shift $((OPTIND - 1))
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# create array
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declare -ga _pre_commands_array
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_pre_commands_array=("$@")
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[[ -n $_debug ]] && echo "_pre_commands_array:" "${_pre_commands_array[@]}"
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# Sanitize mode numbers
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[[ "$_mode" == "1" ]] && _mode="ephemeral"
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[[ "$_mode" == "2" ]] && _mode="persistent"
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[[ "$_mode" == "3" ]] && _mode="recreate-persistent"
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[[ "$_mode" == "4" ]] && _mode="remove-persistent"
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# build the podman options array
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declare -ga _pre_options_array
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_pre_options_array+=("-it")
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#[[ "$_mode" == "ephemeral" ]] && _pre_options_array+=("--rm")
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_pre_options_array+=("-v" "${_workdir}:${_workdir}")
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_pre_options_array+=("-w" "${_workdir}")
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[[ -n $_maskdir ]] && _pre_options_array+=("-v" "${_maskdir}")
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[[ -n $_systemd ]] && _pre_options_array+=("--systemd=always")
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[[ -n $_debug ]] && echo "_pre_options_array:" "${_pre_options_array[@]}"
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}
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_makeExec () {
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# make executable
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if [[ -n $_mkexec ]]; then
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# assume script/program is the first argument in the command and break on whitespace
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_program="${_pre_commands_array[0]}"
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# make executable on the host
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chmod +x "${_program}"
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# make executable in the container
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#COMMAND="chmod 755 ${_program} && $COMMAND"
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fi
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}
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_sanityChecks () {
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# If missing, create workdir
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if ! [[ -d "$_workdir" ]]; then
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[[ -z $_silent ]] && echo "--workdir does not exist!"
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[[ -z $_silent ]] && echo "Creating ${_workdir} now..."
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mkdir -p "${_workdir}"
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fi
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# Grant container SELinux access to the _workdir
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fixPermissions "${_workdir}"
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}
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_runPodmanRunWrapper() {
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_makeExec
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local _prw_array
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_prw_array=("-m" "${_mode}" "--optionsarray" "_pre_options_array" "-i" "${_image}" "-n" "${_name}" "--commandsarray" "_pre_commands_array")
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[[ -n $_debug ]] && _prw_array+=("--debug")
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[[ -n $_silent ]] && _prw_array+=("--silent")
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if [[ -n $_debug ]]; then
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echo -n "PRE->PRW argument array: "
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printf '"%s" ' "${_prw_array[@]}"
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echo ""
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fi
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podmanRunWrapper -a _prw_array
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}
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#########################
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####### EXECUTE #########
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#########################
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_execute () {
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# Get input
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_parseInput "$@"
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# Call podman-run-wrapper
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_runPodmanRunWrapper
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}
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# Allow this function to be executed directly
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_execute "$@"
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}
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# Allow this file to be executed directly if not being sourced
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if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
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# The following functions are usually handled by build-wrapper
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_getBaseDir () {
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# Get base directory name of where this script resides
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# https://stackoverflow.com/questions/59895/how-to-get-the-source-directory-of-a-bash-script-from-within-the-script-itself#comment54598418_246128
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_basedir=$(dirname "$(readlink -f "$0")")
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}
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_sourceFunctions () {
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# Get the location of this file
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_getBaseDir
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# Go up two directories
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ff="${_basedir%/*/*}/functions"
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# Source functions file
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if [[ -f "$ff" ]]; then
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source "$ff"
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else
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echo "Cannot find functions file: ${ff}"
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fi
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}
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_sourceFunctions
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podmanRunEasy "$@"
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fi
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