AMiRo-OS

################################################################################

# AMiRo-OS is an operating system designed for the Autonomous Mini Robot       #

# (AMiRo) platform.                                                            #

# Copyright (C) 2016..2020  Thomas Schöpping et al.                            #

#                                                                              #

# This program is free software: you can redistribute it and/or modify         #

# it under the terms of the GNU General Public License as published by         #

# the Free Software Foundation, either version 3 of the License, or            #

# (at your option) any later version.                                          #

#                                                                              #

# This program is distributed in the hope that it will be useful,              #

# but WITHOUT ANY WARRANTY; without even the implied warranty of               #

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                #

# GNU General Public License for more details.                                 #

#                                                                              #

# You should have received a copy of the GNU General Public License            #

# along with this program.  If not, see <http://www.gnu.org/licenses/>.        #

#                                                                              #

# This research/work was supported by the Cluster of Excellence Cognitive      #

# Interaction Technology 'CITEC' (EXC 277) at Bielefeld University, which is   #

# funded by the German Research Foundation (DFG).                              #

################################################################################

#!/bin/bash

# load library

source "$(dirname ${BASH_SOURCE[0]})/../tools/bash/setuplib.sh"

### print welcome text #########################################################

# Prints a welcome message to standard out.

#

# usage:      printWelcomeText

# arguments:  n/a

# return:     n/a

#

function printWelcomeText {

  printf "######################################################################\n"

  printf "#                                                                    #\n"

  printf "#             Welcome to the AMiRo-LLD submodule setup!              #\n"

  printf "#                                                                    #\n"

  printf "######################################################################\n"

  printf "#                                                                    #\n"

  printf "# Copyright (c) 2016..2020  Thomas Schöpping                         #\n"

  printf "#                                                                    #\n"

  printf "# This is free software; see the source for copying conditions.      #\n"

  printf "# There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR  #\n"

  printf "# A PARTICULAR PURPOSE. The development of this software was         #\n"

  printf "# supported by the Excellence Cluster EXC 227 Cognitive Interaction  #\n"

  printf "# Technology. The Excellence Cluster EXC 227 is a grant of the       #\n"

  printf "# Deutsche Forschungsgemeinschaft (DFG) in the context of the German #\n"

  printf "# Excellence Initiative.                                             #\n"

  printf "#                                                                    #\n"

  printf "######################################################################\n"

}

### print help #################################################################

# Prints a help text to standard out.

#

# usage:      printHelp

# arguments:  n/a

# return:     n/a

#

function printHelp {

  printInfo "printing help text\n"

  printf "usage:    $(basename ${BASH_SOURCE[0]}) [-h|--help] [-i|--init] [-w|--wipe] [-q|--quit] [--log=<file>]\n"

  printf "options:  -h, --help\n"

  printf "              Print this help text.\n"

  printf "          -i, --init\n"

  printf "              Initialize AMiRo-LLD submodule.\n"

  printf "          -w, --wipe\n"

  printf "              Wipe AMiRo-LLD submodule.\n"

  printf "          -q, --quit\n"

  printf "              Quit the script.\n"

  printf "          --log=<file>\n"

  printf "              Specify a log file.\n"

}

### initialize AMiRo-LLD submodule #############################################

# Initialize the AMiRo-LLD submodule.

#

# usage:      initAmiroLld

# arguments:  n/a

# return:     0

#                 No error or warning occurred.

#             1

#                 Warning: Arborted by user.

#             -1

#                 Error: Unexpected user input.

#             -2

#                 Error: Missing dependencies.

#

function initAmiroLld {

  printInfo "initializing AMiRo-LLD submodule...\n"

  local userdir=$(pwd)

  local peripheryllddir=$(dirname $(realpath ${BASH_SOURCE[0]}))

  local amirollddir=${peripheryllddir}/AMiRo-LLD

  # if the AMiRo-LLD folder is not empty

  if [ ! -z "$(ls -A $amirollddir)" ]; then

    printWarning "$(realpath $amirollddir) is not empty. Delete and reinitialize? [y/n]\n"

    local userinput=""

    readUserInput "YyNn" userinput

    case $userinput in

      Y|y)

        wipeAmiroLld

        ;;

      N|n)

        printWarning "AMiRo-LLD initialization aborted by user\n"

        return 1

        ;;

      *) # sanity check (return error)

        printError "unexpected input: $userinput\n"; return -1;;

    esac

  fi

  # check dependencies

  checkCommands git

  if [ $? -ne 0 ]; then

    printError "Missing dependencies detected.\n"

    return -2

  fi

  # initialize submodule to default branch

  cd $peripheryllddir

  git submodule update --init $amirollddir 2>&1 | tee -a $LOG_FILE

  while [ ${PIPESTATUS[0]} -ne 0 ]; do

    printWarning "initialitaion failed. Retry? [y/n]\n"

    local userinput=""

    readUserInput "YyNn" userinput

    case "$userinput" in

      Y|y)

        git submodule update --init $amirollddir 2>&1 | tee -a $LOG_FILE;;

      N|n)

        printWarning "AMiRo-LLD initialization aborted by user\n"

        cd $userdir

        return 1

        ;;

      *) # sanity check (return error)

        printError "unexpected input: $userinput\n"; return -1;;

    esac

  done

  cd $userdir

  return 0

}

### reset AMiRo-LLD submodule and wipe directory ###############################

# Resets the AMiRo-LLD Git submodule and wipes the directory.

#

# usage:      wipeAmiroLld

# arguments:  n/a

# return:     0

#                 No error or warning occurred.

#             1

#                 Warning: AMiRo-LLD Git submodule already empty

#             2

#                 Warning: Aborted by user.

#             -1

#                 Error: Unexpected input occurred.

#             -2

#                 Error: Missing dependencies.

#

function wipeAmiroLld {

  printInfo "reset and wipe Git submodule $amirollddir\n"

  local userdir=$(pwd)

  local peripheryllddir=$(dirname $(realpath ${BASH_SOURCE[0]}))

  local amirollddir=${peripheryllddir}/AMiRo-LLD

  # check dependencies

  checkCommands git

  if [ $? -ne 0 ]; then

    printError "Missing dependencies detected.\n"

    return -2

  fi

  # if the AMiRo-LLD folder is empty

  if [ -z "$(ls -A $amirollddir)" ]; then

    printWarning "$amirollddir is already empty\n"

    return 1

  else

    # get some information from Git

    local userdir=$(pwd)

    cd $peripheryllddir

    local git_basehash=($(git ls-tree -d HEAD $amirollddir)); git_basehash=${git_basehash[2]}

    cd $amirollddir

    local git_branch_current=$(git rev-parse --abbrev-ref HEAD)

    local git_difftobase="$(git diff ${git_basehash}..HEAD)"

    local git_commits=$(git log --format=oneline ${git_basehash}..HEAD)

    local git_dirtyfiles=($(git ls-files -dmo --exclude-standard --exclude=/doc))

    cd $userdir

    local issues=0

    # if HEAD is ahead of submodule base commit

    if [ -n "$git_difftobase" ]; then

      issues=$((issues + 1))

      printWarning "HEAD is ahead of submodule base\n"

    fi

    # if there are untracked, modified, or deleted files

    if [ ${#git_dirtyfiles[@]} != 0 ]; then

      issues=$((issues + 1))

      printWarning "there are ${#git_dirtyfiles[@]} untracked, modified, or deleted files\n"

    fi

    if [ $issues -gt 0 ]; then

      local userinput=""

      printWarning "$issues issues detected. Do you want to continue? [y/n]\n"

      readUserInput "YyNn" userinput

      case "$userinput" in

        Y|y)

          ;;

        N|n)

          printfWarning "wiping AMiRo-LLD Git submodule aborted by user\n"

          return 2

          ;;

        *) # sanity check (return error)

          printError "unexpected input: $userinput\n"; return -1;;

      esac

    fi

    # checkout base commit and delete all local branches

    cd $peripheryllddir

    git submodule update --force --checkout $amirollddir | tee -a $LOG_FILE

    cd $amirollddir

    local git_branches=($(git for-each-ref --format="%(refname)"))

    for branch in $git_branches; do

      if [[ $branch = *"heads/"* ]]; then

        git branch -D ${branch##*/} | tee -a $LOG_FILE

      fi

    done

    cd $userdir

    # deinitialize AMiRo-LLD submodule and delete any remaining files

    cd $peripheryllddir

    git submodule deinit -f $amirollddir 2>&1 | tee -a $LOG_FILE

    rm -rf $amirollddir/*

    cd $userdir

    return 0

  fi

}

### main function of this script ###############################################

# Initializes or wipes the AMiRo-LLD Git submodule.

#

# usage:      see function printHelp

# arguments:  see function printHelp

# return:     0

#                 No error or warning occurred.

#

function main {

  # print welcome/info text if not suppressed

  if [[ $@ != *"--noinfo"* ]]; then

    printWelcomeText

  else

    printf "######################################################################\n"

  fi

  printf "\n"

  # if --help or -h was specified, print the help text and exit

  if [[ $@ == *"--help"* || $@ == *"-h"* ]]; then

    printHelp

    printf "\n"

    quitScript

  fi

  # set log file if specified

  if [[ $@ == *"--log"* ]] || [[ $@ == *"--LOG"* ]]; then

    # get the parameter (file name)

    local cmdidx=1

    while [[ ! "${!cmdidx}" = "--log"* ]] && [[ ! "${!cmdidx}" = "--LOG"* ]]; do

      cmdidx=$[cmdidx + 1]

    done

    local cmd="${!cmdidx}"

    local logfile=""

    if [[ "$cmd" = "--log="* ]] || [[ "$cmd" = "--LOG="* ]]; then

      logfile=${cmd#*=}

    else

      local filenameidx=$((cmdidx + 1))

      logfile="${!filenameidx}"

    fi

    # optionally force silent appending

    if [[ "$cmd" = "--LOG"* ]]; then

      setLogFile --option=c --quiet "$logfile" LOG_FILE

    else

      setLogFile "$logfile" LOG_FILE

      printf "\n"

    fi

  fi

  # log script name

  printLog "this is $(realpath ${BASH_SOURCE[0]})\n"

  # parse arguments

  local otherargs=()

  while [ $# -gt 0 ]; do

    if ( parseIsOption $1 ); then

      case "$1" in

        -h|--help) # already handled; ignore

          shift 1;;

        -i|--init)

           initAmiroLld; printf "\n"; shift 1;;

        -w|--wipe)

           wipeAmiroLld; printf "\n"; shift 1;;

        -q|--quit)

          quitScript; shift 1;;

        --log=*|--LOG=*) # already handled; ignore

          shift 1;;

        --log|--LOG) # already handled; ignore

          shift 2;;

        --noinfo) # already handled; ignore

          shift 1;;

        *)

          printError "invalid option: $1\n"; shift 1;;

      esac

    else

      otherargs+=("$1")

      shift 1

    fi

  done

  # interactive menu

  while ( true ); do

    # main menu info prompt and selection

    printInfo "Periphery-LLD setup main menu\n"

    printf "Please select one of the following actions:\n"

    printf "  [I] - initialize AMiRo-LLD submodule\n"

    printf "  [W] - wipe AMiRo-LLD submodule\n"

    printf "  [Q] - quit this setup\n"

    local userinput=""

    readUserInput "IiPpDdWwQq" userinput

    printf "\n"

    # evaluate user selection

    case "$userinput" in

      I|i)

        initAmiroLld; printf "\n";;

      W|w)

        wipeAmiroLld; printf "\n";;

      Q|q)

        quitScript;;

      *) # sanity check (exit with error)

        printError "unexpected argument: $userinput\n";;

    esac

  done

  exit 0

}

################################################################################

# SCRIPT ENTRY POINT                                                           #

################################################################################

main "$@"