nix-processmgmt/tools/common/nixproc-build.in

#!/bin/bash -e

# Shows the usage of this command to the user

showUsage()
{
    me="$(basename "$0")"

    cat <<EOF
Usage: $me [OPTION] [PATH]
  or: $me --undeploy [OPTION]

This command builds a Nix profile containing multiple sysvinit scripts, and
their start and stop symlinks.

Options:
      --undeploy      Generates a configuration to undeploy all processes
  -P, --process-manager=MANAGER
                      Process manager to build for
      --state-dir     Changes the directory in which the state of the processes
                      are stored
      --runtime-dir   Changes the directory in which the PID files are stored
      --log-dir       Changes the directory in which the log files are stored
      --tmp-dir       Changes the directory in which temp files are stored
      --cache-dir     Changes the directory in which cache files are stored
      --spool-dir     Changes the directory in which spool files are stored
      --lock-dir      Changes the directory in which lock files are stored
      --lib-dir       Changes the directory in which state files are stored
      --force-disable-user-change
                      Forces to not create users, groups or change user
                      permissions
      --no-out-link   Do not create a symlink to the output path
      --show-trace    Shows a trace of the output
      --extra-params=PARAMS
                      A string with an attribute set in the Nix expression
                      language propagating extra parameters to the input models
  -h, --help          Shows the usage of this command

Environment:
  NIXPROC_PROCESSES    Path to a processes model
  NIXPROC_STATE_DIR    Changes the directory in which the state of the
                       processes is stored
  NIXPROC_RUNTIME_DIR  Changes the directory in which the PID files are stored
  NIXPROC_LOG_DIR      Changes the directory in which log files are stored
  NIXPROC_TMP_DIR      Changes the directory in which temp files are stored
  NIXPROC_CACHE_DIR    Changes the directory in which cache files are stored
  NIXPROC_SPOOL_DIR    Changes the directory in which spool files are stored
  NIXPROC_LOCK_DIR     Changes the directory in which lock files are stored
  NIXPROC_LIB_DIR      Changes the directory in which state files are stored
  NIXPROC_FORCE_DISABLE_USER_CHANGE
                       Forces to not create users, groups or change user
                       permissions
EOF
}

# Parse valid argument options

PARAMS=`@getopt@ -n $0 -o P:h -l undeploy,process-manager:,state-dir:,runtime-dir:,log-dir:,tmp-dir:,cache-dir:,spool-dir:,lock-dir:,lib-dir:,force-disable-user-change,no-out-link,show-trace,extra-params:,help -- "$@"`

if [ $? != 0 ]
then
    showUsage
    exit 1
fi

# Evaluate valid options

eval set -- "$PARAMS"

while [ "$1" != "--" ]
do
    case "$1" in
        --undeploy)
            undeploy=1
            ;;
        -P|--process-manager)
            processManager="$2"
            ;;
        --state-dir)
            stateDirArg="--argstr stateDir $2"
            ;;
        --runtime-dir)
            runtimeDirArg="--argstr runtimeDir $2"
            ;;
        --log-dir)
            logDirArg="--argstr logDir $2"
            ;;
        --tmp-dir)
            tmpDirArg="--argstr tmpDir $2"
            ;;
        --cache-dir)
            cacheDirArg="--argstr cacheDir $2"
            ;;
        --spool-dir)
            cacheDirArg="--argstr spoolDir $2"
            ;;
        --lock-dir)
            lockDirArg="--argstr lockDir $2"
            ;;
        --lib-dir)
            libDirArg="--argstr libDir $2"
            ;;
        --force-disable-user-change)
            forceDisableUserChangeArg="--arg forceDisableUserChange true"
            ;;
        --no-out-link)
            noOutLinkArg="--no-out-link"
            ;;
        --show-trace)
            showTraceArg="--show-trace"
            ;;
        --extra-params)
            extraParamsArg=("--arg" "extraParams" "$2")
            ;;
        -h|--help)
            showUsage
            exit 0
            ;;
    esac

    shift
done

shift

# Validate the given options

if [ "$processManager" = "" ]
then
    echo "No process manager specified!" >&2
    exit 1
else
    processManagerArg="--argstr processManager $processManager"
fi

if [ "$undeploy" = "1" ]
then
    exprFileArg="--arg exprFile null"
else
    if [ "$1" != "" ]
    then
        exprFile="$(@readlink@ -f "$1")"
    elif [ "$NIXPROC_PROCESSES" != "" ]
    then
        exprFile="$(@readlink@ -f "$NIXPROC_PROCESSES")"
    else
        echo "No processes expression provided!" >&2
        exit 1
    fi

    exprFileArg="--argstr exprFile $exprFile"
fi

if [ "$NIXPROC_STATE_DIR" != "" ]
then
    stateDirArg="--argstr stateDir $NIXPROC_STATE_DIR"
fi

if [ "$NIXPROC_RUNTIME_DIR" != "" ]
then
    runtimeDirArg="--argstr stateDir $NIXPROC_RUNTIME_DIR"
fi

if [ "$NIXPROC_LOG_DIR" != "" ]
then
    logDirArg="--argstr logDir $NIXPROC_LOG_DIR"
fi

if [ "$NIXPROC_TMP_DIR" != "" ]
then
    tmpDirArg="--argstr tmpDir $NIXPROC_TMP_DIR"
fi

if [ "$NIXPROC_CACHE_DIR" != "" ]
then
    cacheDirArg="--argstr cacheDir $NIXPROC_CACHE_DIR"
fi

if [ "$NIXPROC_SPOOL_DIR" != "" ]
then
    cacheDirArg="--argstr spoolDir $NIXPROC_SPOOL_DIR"
fi

if [ "$NIXPROC_LOCK_DIR" != "" ]
then
    cacheDirArg="--argstr lockDir $NIXPROC_LOCK_DIR"
fi

if [ "$NIXPROC_LIB_DIR" != "" ]
then
    cacheDirArg="--argstr libDir $NIXPROC_LIB_DIR"
fi

if [ "$NIXPROC_FORCE_DISABLE_USER_CHANGE" = "1" ]
then
    forceDisableUserChangeArg="--arg forceDisableUserChange true"
fi

NIXPROC=${NIXPROC:-@NIXPROC@}

# Build the profile
nix-build $stateDirArg \
  $runtimeDirArg \
  $logDirArg \
  $tmpDirArg \
  $cacheDirArg \
  $spoolDirArg \
  $lockDirArg \
  $libDirArg \
  $forceDisableUserChangeArg \
  --argstr callingUser "$(id -un)" \
  --argstr callingGroup "$(id -gn)" \
  $noOutLinkArg \
  $showTraceArg \
  $processManagerArg \
  "${extraParamsArg[@]}" \
  $exprFileArg \
  $NIXPROC/backends/$processManager/build-$processManager-env.nix