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################################################################################
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# AMiRo-BLT is an bootloader and toolchain designed for the Autonomous Mini    #
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# Robot (AMiRo) platform.                                                      #
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# Copyright (C) 2016..2017  Thomas Schöpping et al.                            #
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#                                                                              #
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# This program is free software: you can redistribute it and/or modify         #
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# it under the terms of the GNU General Public License as published by         #
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# the Free Software Foundation, either version 3 of the License, or            #
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# (at your option) any later version.                                          #
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#                                                                              #
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# This program is distributed in the hope that it will be useful,              #
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# but WITHOUT ANY WARRANTY; without even the implied warranty of               #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                #
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# GNU General Public License for more details.                                 #
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#                                                                              #
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# You should have received a copy of the GNU General Public License            #
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# along with this program.  If not, see <http://www.gnu.org/licenses/>.        #
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#                                                                              #
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# This research/work was supported by the Cluster of Excellence Cognitive      #
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# Interaction Technology 'CITEC' (EXC 277) at Bielefeld University, which is   #
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# funded by the German Research Foundation (DFG).                              #
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################################################################################
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#!/bin/bash
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################################################################################
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# GENERIC FUNCTIONS                                                            #
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################################################################################
29

    
30
### print an error message #####################################################
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# Prints a error <message> to standard output.
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#If variable 'LOG_FILE' is specified, the message is also appended to the given file.
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#
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# usage:      printError <message>
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# arguments:  <message>
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#                 Message string to print.
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# return:     n/a
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#
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function printError {
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  local string="ERROR:   $1"
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  # if a log file is specified
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  if [ -n "$LOG_FILE" ]; then
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    printf "[$(date '+%Y-%m-%d %H:%M:%S')] $string" >> $LOG_FILE
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  fi
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  printf "$(tput setaf 1)>>> $string$(tput sgr 0)" 1>&2
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}
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### print a warning message ####################################################
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# Prints a warning <message> to standard output.
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#If variable 'LOG_FILE' is specified, the message is also appended to the given file.
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#
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# usage:      printMessage <message>
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# arguments:  <message>
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#                 Message string to print.
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# return:     n/a
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#
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function printWarning {
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  local string="WARNING: $1"
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  # if a log file is specified
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  if [ -n "$LOG_FILE" ]; then
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    printf "[$(date '+%Y-%m-%d %H:%M:%S')] $string" >> $LOG_FILE
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  fi
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  printf "$(tput setaf 3)>>> $string$(tput sgr 0)"
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}
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### print an information message ###############################################
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# Prints an information <message> to standard output.
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#If variable 'LOG_FILE' is specified, the message is also appended to the given file.
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#
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# usage:      printInfo <message>
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# arguments:  <message>
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#                 Message string to print.
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# return:     n/a
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#
75
function printInfo {
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  local string="INFO:    $1"
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  # if a log file is specified
78
  if [ -n "$LOG_FILE" ]; then
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    printf "[$(date '+%Y-%m-%d %H:%M:%S')] $string" >> $LOG_FILE
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  fi
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  printf "$(tput setaf 2)>>> $string$(tput sgr 0)"
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}
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84
### print a message to file ####################################################
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# Appends a <message> to a log file, specified by the variable 'LOG_FILE'.
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#
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# usage       printLog <message>
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# arguments:  <message>
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#                 Message string to print.
90
# return:     n/a
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#
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function printLog {
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  local string="LOG:     $1"
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  # if a log file is specified
95
  if [ -n "$LOG_FILE" ]; then
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    printf "[$(date '+%Y-%m-%d %H:%M:%S')] $string" >> $LOG_FILE
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  fi
98
}
99

    
100
### exit the script normally ###################################################
101
# Prints a delimiter and exits the script normally (returns 0).
102
#
103
# usage:      quitScript
104
# arguments:  n/a
105
# return:     0
106
#                 No error or warning occurred.
107
#
108
function quitScript {
109
  printInfo "exiting $(realpath ${BASH_SOURCE[0]})\n"
110
  printf "\n"
111
  printf "######################################################################\n"
112
  exit 0
113
}
114

    
115
### read a user input ##########################################################
116
# Reads a single character user input from a set up <options> and stores it in
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# a given <return> variable.
118
#
119
# usage:      readUserInput <options> <return>
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# arguments:  <options>
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#                 String definiing the set of valid characters.
122
#                 If the string is empty, the user can input any character.
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#             <return>
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#                 Variable to store the selected character to.
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# return:     n/a
126
#
127
function readUserInput {
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  local input=""
129
  # read user input
130
  while [ -z $input ] || ( [ -n "$1" ] && [[ ! $input =~ ^[$1]$ ]] ); do
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    read -p "your selection: " -n 1 -e input
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    if [ -z $input ] || ( [ -n "$1" ] && [[ ! $input =~ ^[$1]$ ]] ); then
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      printWarning "[$input] is no valid action\n"
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    fi
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  done
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  printLog "[$input] has been selected\n"
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  eval $2="$input"
138
}
139

    
140
### check whether argument is an option ########################################
141
# Checks a <string> whether it is an option.
142
# Options are defined to either start with '--' followed by any string, or
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# to start with a single '-' followed by a single character, or
144
# to start with a single '-' followed by a single character, a '=' and any string.
145
# Examples: '--option', '--option=arg', '-o', '-o=arg', '--'
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#
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# usage:      parseIsOption <string>
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# arguments:  <string>
149
#                 A string to check whether it is an option.
150
# return:     0
151
#                 <string> is an option.
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#             -1
153
#                 <string> is not an option.
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#
155
function parseIsOption {
156
  if [[ "$1" =~ ^-(.$|.=.*) ]] || [[ "$1" =~ ^--.* ]]; then
157
    return 0
158
  else
159
    return -1
160
  fi
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}
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163
### set the log file ###########################################################
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# Sets a specified <infile> as log file and checks whether it already exists.
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# If so, the log may either be appended to the file, its content can be cleared,
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# or no log is generated at all.
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# The resulting path is stored in <outvar>.
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#
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# usage:      setLogFile [--option=<option>] [--quiet] <infile> <outvar>
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# arguments:  --option=<option>
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#                 Select what to do if <file> already exists.
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#                 Possible values are 'a', 'c', 'r' and 'n'.
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#                 - a: append (starts with a separator)
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#                 - c: continue (does not insert a seperator)
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#                 - r: delete and restart
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#                 - n: no log
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#                 If no option is secified but <file> exists, an interactive selection is provided.
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#             --quiet
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#                 Suppress all messages.
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#             <infile>
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#                 Path of the wanted log file.
182
#             <outvar>
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#                 Variable to store the path of the log file to.
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# return:     0
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#                 No error or warning occurred.
186
#             -1
187
#                 Error: invalid input
188
#
189
function setLogFile {
190
  local filepath=""
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  local option=""
192
  local quiet=false
193

    
194
  # parse arguments
195
  local otherargs=()
196
  while [ $# -gt 0 ]; do
197
    if ( parseIsOption $1 ); then
198
      case "$1" in
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        -o=*|--option=*)
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          option=${1#*=}; shift 1;;
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        -o*|--option*)
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          option="$2"; shift 2;;
203
        -q|--quiet)
204
          quiet=true; shift 1;;
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        *)
206
          printError "invalid option: $1\n"; shift 1;;
207
      esac
208
    else
209
      otherargs+=("$1")
210
      shift 1
211
    fi
212
  done
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  filepath=$(realpath ${otherargs[0]})
214

    
215
  # if file already exists
216
  if [ -e $filepath ]; then
217
    # if no option was specified, ask what to do
218
    if [ -z "$option" ]; then
219
      printWarning "log file $filepath already esists\n"
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      local userinput=""
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      printf "Select what to do:\n"
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      printf "  [A] - append log\n"
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      printf "  [R] - restart log (delete existing file)\n"
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      printf "  [N] - no log\n"
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      readUserInput "AaRrNn" userinput
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      option=${userinput,,}
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    fi
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    # evaluate option
229
    case "$option" in
230
      a|c)
231
        if [ $quiet = false ]; then
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          printInfo "appending log to $filepath\n"
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        fi
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        if [ $option != c ]; then
235
          printf "\n" >> $filepath
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          printf "######################################################################\n" >> $filepath
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          printf "\n" >> $filepath
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        fi
239
        ;;
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      r)
241
        echo -n "" > $filepath
242
        if [ $quiet = false ]; then
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          printInfo "content of $filepath wiped\n"
244
        fi
245
        ;;
246
      n)
247
        if [ $quiet = false ]; then
248
          printInfo "no log file will be generated\n"
249
        fi
250
        filepath=""
251
        ;;
252
      *) # sanity check (return error)
253
        printError "unexpected argument: $option\n"; return -1;;
254
    esac
255
  else
256
    if [ $quiet = false ]; then
257
      printInfo "log file set to $filepath\n"
258
    fi
259
  fi
260

    
261
  eval ${otherargs[1]}="$filepath"
262

    
263
  return 0
264
}
265

    
266
################################################################################
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# SPECIFIC FUNCTIONS                                                           #
268
################################################################################
269

    
270
### print welcome text #########################################################
271
# Prints a welcome message to standard out.
272
#
273
# usage:      printWelcomeText
274
# arguments:  n/a
275
# return:     n/a
276
#
277
function printWelcomeText {
278
  printf "######################################################################\n"
279
  printf "#                                                                    #\n"
280
  printf "#                     Welcome to the GCC setup!                      #\n"
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  printf "#                                                                    #\n"
282
  printf "######################################################################\n"
283
  printf "#                                                                    #\n"
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  printf "# Copyright (c) 2016..2017  Thomas Schöpping                         #\n"
285
  printf "#                                                                    #\n"
286
  printf "# This is free software; see the source for copying conditions.      #\n"
287
  printf "# There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR  #\n"
288
  printf "# A PARTICULAR PURPOSE. The development of this software was         #\n"
289
  printf "# supported by the Excellence Cluster EXC 227 Cognitive Interaction  #\n"
290
  printf "# Technology. The Excellence Cluster EXC 227 is a grant of the       #\n"
291
  printf "# Deutsche Forschungsgemeinschaft (DFG) in the context of the German #\n"
292
  printf "# Excellence Initiative.                                             #\n"
293
  printf "#                                                                    #\n"
294
  printf "######################################################################\n"
295
}
296

    
297
### print help #################################################################
298
# Prints a help text to standard out.
299
#
300
# usage:      printHelp
301
# arguments:  n/a
302
# return:     n/a
303
#
304
function printHelp {
305
  printInfo "printing help text\n"
306
  printf "usage:    $(basename ${BASH_SOURCE[0]}) [-h|--help] [-i|--install] [-c|--change] [-q|--quit] [--log=<file>]\n"
307
  printf "\n"
308
  printf "options:  -h, --help\n"
309
  printf "              Print this help text.\n"
310
  printf "          -i, --install\n"
311
  printf "              Install another version.\n"
312
  printf "          -c, --change\n"
313
  printf "              Change the default version.\n"
314
  printf "          -q, --quit\n"
315
  printf "              Quit the script.\n"
316
  printf "          --log=<file>\n"
317
  printf "              Specify a log file.\n"
318
}
319

    
320
### detect installed versions ##################################################
321
# Detect all installed version of arm-none-eabi-gcc, if any.
322
#
323
# usage:      detectInstalledVersions <binarray> <current>
324
# arguments:  <binarray>
325
#                 Array variable to store all detected binary paths to. 
326
#             <current>
327
#                 Variable to store the currently active binary to.
328
# return:     n/a
329
#
330
function detectInstalledVersions {
331
  local armgcc_command=$(command -v arm-none-eabi-gcc)
332
  local armgcc_commanddir=${HOME}/gcc-none-eabi
333
  local armgcc_currentbin=""
334
  local armgcc_installdir=${HOME}/gcc-none-eabi
335
  local armgcc_bins=()
336
  local armgcc_bincnt=0
337

    
338
  # check for already installed versions
339
  if [ -n "$armgcc_command" ]; then
340
    # follow the link to the actual binary
341
    armgcc_commanddir=$(dirname $armgcc_command)
342
    armgcc_currentbin=$armgcc_command
343
    while [ -L $armgcc_currentbin ]; do
344
      armgcc_currentbin=$(readlink $armgcc_currentbin)
345
    done
346
    # the installation location is assumed to be two directories up
347
    armgcc_installdir=$(realpath $(dirname ${armgcc_currentbin})/../../)
348
    # list all detected instalations
349
    for dir in $(ls -d ${armgcc_installdir}/*/); do
350
      if [ -f ${dir}/bin/arm-none-eabi-gcc ]; then
351
        armgcc_bins[$armgcc_bincnt]=${dir}bin/arm-none-eabi-gcc
352
        armgcc_bincnt=$((armgcc_bincnt + 1))
353
      fi
354
    done
355
  fi
356

    
357
  eval "$1=(${armgcc_bins[*]})"
358
  eval $2="$armgcc_currentbin"
359
}
360

    
361
### install new version ########################################################
362
# Fetches an installation package from the internet, installs it and expands
363
# the $PATH environment variable (via .bashrc) if required.
364
#
365
# usage:      installNewVersion [-i|--install=<path>] [-l|--link=<path>]
366
# argumenst:  -i, --install <path>
367
#                 Path where to install the new version to.
368
#             -l, --link <path>
369
#                 Path where to create according links.
370
# return:     0
371
#                 No error or warnign occurred.
372
#             1
373
#                 Warning: Installation aborted by user.
374
#
375
function installNewVersion {
376
  local installbasedir=${HOME}/gcc-arm-embedded
377
  local linkdir="/usr/bin"
378

    
379
  # parse arguments
380
  local otherargs=()
381
  while [ $# -gt 0 ]; do
382
    if ( parseIsOption $1 ); then
383
      case "$1" in
384
        -i=*|--install=*)
385
          installbasedir=$(realpath "${1#*=}"); shift 1;;
386
        -i|--install)
387
          installbasedir="$2"; shift 2;;
388
        -l=*|--link=*)
389
          linkdir=$(realpath "${1#*=}"); shift 1;;
390
        -l|--link)
391
          linkdir="$2"; shift 2;;
392
        *) # sanity check (exit with error)
393
          printError "invalid option: $1\n"; shift 1;;
394
      esac
395
    else
396
      otherargs+=("$1")
397
      shift 1
398
    fi
399
  done
400

    
401
  # read download URL form user
402
  printLog "read installation url from user\n"
403
  local armgcc_downloadurl=""
404
  while [[ "$armgcc_downloadurl" != *".tar.bz2" ]]; do
405
    read -p "Download link for the installation file: " -e armgcc_downloadurl
406
    if [[ $armgcc_downloadurl != *".tar.bz2" ]]; then
407
      printWarning "please specify a .tar.bz2 file\n"
408
    fi
409
  done
410
  printLog "user selected $armgcc_downloadurl\n"
411

    
412
  # if the file already exists, ask the user if it should be downloaded again
413
  local armgcc_tarball=$(basename "$armgcc_downloadurl")
414
  if [ -e "$armgcc_tarball" ]; then
415
    printWarning "$armgcc_tarball already exists. Delete and redownload? [y/n]\n"
416
    local userinput=""
417
    readUserInput "YyNn" userinput
418
    case "$userinput" in
419
      Y|y)
420
        rm "$armgcc_tarball"
421
        wget "$armgcc_downloadurl" | tee -a $LOG_FILE
422
        ;;
423
      N|n)
424
        ;;
425
      *) # sanity check (exit with error)
426
        printError "unexpected argument: $userinput\n";;
427
    esac
428
  else
429
    wget "$armgcc_downloadurl" | tee -a $LOG_FILE
430
  fi
431

    
432
  # extract tarball
433
  printInfo "extracting ${armgcc_tarball}...\n"
434
  tar -jxf "$armgcc_tarball" | tee -a $LOG_FILE
435
  local compilerdir=`tar --bzip2 -tf ${armgcc_tarball} | sed -e 's@/.*@@' | uniq`
436

    
437
  # install gcc arm embedded
438
  printLog "read installation directory from user\n"
439
  local installdir=""
440
  read -p "Installation directory: " -i ${installbasedir}/${compilerdir} -e installdir
441
  printLog "user selected $installdir\n"
442
  printLog "read link directory\n"
443
  read -p "Link directory: " -i $linkdir -e linkdir
444
  printLog "user selected $linkdir\n"
445
  # if the installation path already exists, ask user to overwrite
446
  if [ -d "$installdir" ]; then
447
    printWarning "$installdir already exists. Overwrite? [y/n]\n"
448
    local userinput=""
449
    readUserInput "YyNn" userinput
450
    case "$userinput" in
451
      Y|y)
452
        ;;
453
      N|n)
454
        printWarning "installation aborted by user\n"
455
        return 1
456
        ;;
457
      *) # sanity check (exit with error)
458
        printError "invalid option: $userinput\n";;
459
    esac
460
  # make sure the whole ínstallation path exists
461
  else
462
    while [ ! -d $(dirname "$installdir") ]; do
463
      local dir=$(dirname "$installdir") 
464
      while [ ! -d $(dirname "$dir") ]; do
465
        dir=$(dirname "$dir")
466
      done
467
      echo "mkdir $dir"
468
      mkdir "$dir"
469
    done
470
  fi
471
  # copy the extracted compiler folder
472
  cp -fR "$compilerdir" "$installdir"
473
  # make sure whole link path exists
474
  while [ ! -d "$linkdir" ]; do
475
    local dir="$linkdir"
476
    while [ ! -d $(dirname "$linkdir") ]; do
477
      dir=$(dirname "$dir")
478
    done
479
    mkdir "$dir"
480
  done
481
  # create / overwrite links
482
  ls ${installdir}/bin/ | xargs -i ln -sf ${installdir}/bin/{} ${linkdir}/{}
483
  printInfo "default version set to $(arm-none-eabi-gcc -dumpversion)\n"
484

    
485
  # append the link directory to the PATH environment variable if required
486
  if [[ ! "$linkdir" = *"$PATH"* ]]; then
487
    local bashrc_file=${HOME}/.bashrc
488
    local bashrc_identifier="##### AMiRo ENVIRONMENT CONFIGURATION #####"
489
    local bashrc_note="# DO NOT EDIT THESE LINES MANUALLY!"
490
    local bashrc_entry="export PATH=\$PATH:$linkdir"
491

    
492
    # find and edit old entry, or append a new one to the file
493
    local bashrc_idlines=$(grep -x -n "$bashrc_identifier" "$bashrc_file" | cut -f1 -d:) # string of line numbers
494
    bashrc_idlines=(${bashrc_idlines//"\n"/" "}) # array of line numbers
495
    case ${#bashrc_idlines[@]} in
496

    
497
      # append a new entry to the BASHRC_FILE
498
      0)
499
        # make sure the last line is empty
500
        if [[ ! $(tail -1 $bashrc_file) =~ ^[\ \t]*$ ]]; then
501
          printf "\n" >> $bashrc_file
502
        fi
503
        # append text to file
504
        sed -i '$a'"$bashrc_identifier\n$bashrc_note\n$bashrc_entry\n$bashrc_identifier\n" $bashrc_file
505
        # print note
506
        printInfo "Your $bashrc_file has been updated. You need to source it to apply the changes in your environment.\n"
507
        read -p "  Understood!"
508
        ;;
509

    
510
      # extend the old entry
511
      2)
512
        # don't do anything if the line is already present
513
        local bashrc_entrylines=$(grep -x -n "$bashrc_entry" $bashrc_file | cut -f1 -d:) # string of line numbers
514
        bashrc_entrylines=(${bashrc_entrylines//"\n"/" "}) # array of line numbers
515
        printf "$bashrc_entrylines\n"
516
        if [[ ${#bashrc_entrylines[@]} = 0 ]]; then
517
          # insert the entry before the closing identifier
518
          sed -i "${bashrc_idlines[1]}"'i'"$bashrc_entry" $bashrc_file
519
          # print note
520
          printInfo "Your $bashrc_file has been updated. You need to source it to apply the changes in your environment.\n"
521
          read -p "  Understood!"
522
        elif [[ ${#bashrc_entrylines[@]} -eq 1 && ( ${bashrc_entrylines[0]} -lt ${bashrc_idlines[0]} || ${bashrc_entrylines[0]} -gt ${bashrc_idlines[1]} ) ]]; then
523
          # print an error that there is an entry at the wrong place
524
          printError "corrupted entry in your $bashrc_file detected\n"
525
          printf "The following entry was found at the wrong place:\n"
526
          printf "\n"
527
          printf "$bashrc_entry\n"
528
          printf "\n"
529
          printf "To fix this, delete the line and rerun this setup.\n"
530
          read -p "  Understood!"
531
        elif [[ ${#bashrc_entrylines[@]} -gt 1 ]]; then
532
          # print an error that there are multiple entries
533
          printError "corrupted entry in your $bashrc_file detected\n"
534
          printf "There are multiple identical entries in your $bashrc_file file.\n"
535
          printf "To fix it, make sure that it contains the following line exactly once:\n"
536
          printf "\n"
537
          printf "$bashrc_entry\n"
538
          printf "\n"
539
          read -p "  Understood!"
540
        fi
541
        ;;
542

    
543
      # error state (corrupted entry detected)
544
      *)
545
        printError "unable to append link directory to \$PATH variable\n"
546
        printf "There seems to be a broken entry in your $bashrc_file file.\n"
547
        printf "To fix it, make sure that the following line appears exactly twice and encloses your AMiRo related settings:\n"
548
        printf "\n"
549
        printf "$bashrc_identifier\n"
550
        printf "\n"
551
        read -p "  Understood!"
552
        ;;
553
    esac
554
  fi
555

    
556
  # clean up the current directory
557
  rm "$armgcc_tarball"
558
  rm -rf "$compilerdir"
559

    
560
  return 0
561
}
562

    
563
### change default version #####################################################
564
# Change the default arm-none-eabi-gcc version.
565
#
566
# usage:      installNewVersion <versions> <linkdir>
567
# argumenst:  <versions>
568
#                 Array of available versions (full path to binary).
569
#             <linkdir>
570
#                 Path where to delete old and create new links.
571
# return:     0
572
#                 No error or warnign occurred.
573
#             -1
574
#                 Error: no installation detected.
575
#
576
function changeDefaultVersion {
577
  local versions=("${!1}")
578
  local linkdir="$2"
579

    
580
  # check whether an installation was detected
581
  if [ ${#versions[@]} -eq 0 ]; then
582
    printError "no installation detected\n"
583
    return -1
584
  else
585
    # print all available versions
586
    printInfo "choose the installation to switch to or type 'A' to abort:\n"
587
    for (( cnt=0; cnt<${#versions[@]}; ++cnt )); do
588
      printf "  %2u: %s\n" $(($cnt + 1)) ${versions[$cnt]}
589
    done
590

    
591
    # read user selection
592
    printLog "read user slection\n"
593
    local userinput=""
594
    while [[ ! "$userinput" =~ ^[0-9]+$ ]] || [ ! "$userinput" -gt 0 ] || [ ! "$userinput" -le ${#versions[@]} ] && [[ ! "$userinput" =~ ^[Aa]$ ]]; do
595
      read -p "your selection: " -e userinput
596
      printLog "user selection: $userinput\n"
597
      if [[ ! "$userinput" =~ ^[0-9]+$ ]] || [ ! "$userinput" -gt 0 ] || [ ! "$userinput" -le ${#versions[@]} ] && [[ ! "$userinput" =~ ^[Aa]$ ]]; then
598
        printWarning "Please enter an integer between 1 and ${#versions[@]} or 'A' to abort.\n"
599
      fi
600
    done
601

    
602
    if [[ "$userinput" =~ ^[Aa]$ ]]; then
603
      printWarning "aborted by user\n"
604
    else
605
      local idx=$((userinput - 1))
606
      # find and delete old links
607
      rm `find $linkdir -maxdepth 1 -type l | grep -Ev "*[0-9]\.[0-9]\.[0-9]"`
608
      # create new links
609
      local bindir=$(dirname ${versions[$idx]})
610
      ls $bindir | xargs -i ln -sf $bindir/{} $linkdir/{}
611
      printInfo "default version set to $(arm-none-eabi-gcc -dumpversion)\n"
612
    fi
613
  fi
614

    
615
  return 0
616
}
617

    
618
### main function of this script ###############################################
619
# The IDE setup lets the user select an IDE of choice.
620
# As of now, only QtCreator is supported.
621
#
622
# usage:      see function printHelp
623
# arguments:  see function printHelp
624
# return:     0
625
#                 No error or warning occurred.
626
#
627
function main {
628
  # print welcome/info text if not suppressed
629
  if [[ $@ != *"--noinfo"* ]]; then
630
    printWelcomeText
631
  else
632
    printf "######################################################################\n"
633
  fi
634
  printf "\n"
635

    
636
  # if --help or -h was specified, print the help text and exit
637
  if [[ $@ == *"--help"* || $@ == *"-h"* ]]; then
638
    printHelp
639
    printf "\n"
640
    quitScript
641
  fi
642

    
643
  # set log file if specified
644
  if [[ $@ == *"--log"* ]] || [[ $@ == *"--LOG"* ]]; then
645
    # get the parameter (file name)
646
    local cmdidx=1
647
    while [[ ! "${!cmdidx}" = "--log"* ]] && [[ ! "${!cmdidx}" = "--LOG"* ]]; do
648
      cmdidx=$[cmdidx + 1]
649
    done
650
    local cmd="${!cmdidx}"
651
    local logfile=""
652
    if [[ "$cmd" = "--log="* ]] || [[ "$cmd" = "--LOG="* ]]; then
653
      logfile=${cmd#*=}
654
    else
655
      local filenameidx=$((cmdidx + 1))
656
      logfile="${!filenameidx}"
657
    fi
658
    # optionally force silent appending
659
    if [[ "$cmd" = "--LOG"* ]]; then
660
      setLogFile --option=c --quiet "$logfile" LOG_FILE
661
    else
662
      setLogFile "$logfile" LOG_FILE
663
      printf "\n"
664
    fi
665
  fi
666
  # log script name
667
  printLog "this is $(realpath ${BASH_SOURCE[0]})\n"
668

    
669
  # detect installed versions and inform user
670
  local installedversions=()
671
  local currentversion=""
672
  detectInstalledVersions installedversions currentversion
673
  case "${#installedversions[@]}" in
674
    0)
675
      printInfo "no installation has been detected\n";;
676
    1)
677
      printInfo "1 installation has been detected:\n";;
678
    *)
679
      printInfo "${#installedversions[@]} installations have been detected:\n";;
680
  esac
681
  for (( idx=0; idx<${#installedversions[@]}; ++idx )); do
682
    if [ ${installedversions[$idx]} = "$currentversion" ]; then
683
      printInfo "  * ${installedversions[$idx]}\n"
684
    else
685
      printInfo "    ${installedversions[$idx]}\n"
686
    fi
687
  done
688
  printf "\n"
689

    
690
  # parse arguments
691
  local otherargs=()
692
  while [ $# -gt 0 ]; do
693
    if ( parseIsOption $1 ); then
694
      case "$1" in
695
        -h|--help) # already handled; ignore
696
          shift 1;;
697
        -i|--init)
698
          if [ -z "$currentversion" ]; then
699
            installNewVersion
700
          else
701
            installNewVersion --install=$(realpath $(dirname "$currentversion")/../../) --link=$(realpath $(dirname "$currentversion")/../../)
702
          fi
703
          printf "\n"; shift 1;;
704
        -c|--change)
705
          changeDefaultVersion installedversions[@] $(realpath $(dirname "$currentversion")/../../); printf "\n"; shift 1;;
706
        -q|--quit)
707
          quitScript; shift 1;;
708
        --log=*|--LOG=*) # already handled; ignore
709
          shift 1;;
710
        --log|--LOG) # already handled; ignore
711
          shift 2;;
712
        --noinfo) # already handled; ignore
713
          shift 1;;
714
        *)
715
          printError "invalid option: $1\n"; shift 1;;
716
      esac
717
    else
718
      otherargs+=("$1")
719
      shift 1
720
    fi
721
  done
722

    
723
  # interactive menu
724
  while ( true ); do
725
    # main menu info prompt and selection
726
    printInfo "GCC setup main menu\n"
727
    printf "Please select one of the following actions:\n"
728
    printf "  [I] - install another version\n"
729
    printf "  [C] - change default version\n"
730
    printf "  [Q] - quit this setup\n"
731
    local userinput=""
732
    readUserInput "IiCcQq" userinput
733
    printf "\n"
734

    
735
    # evaluate user selection
736
    case "$userinput" in
737
      I|i)
738
        if [ -z "$currentversion" ]; then
739
          installNewVersion
740
        else
741
          installNewVersion --install=$(realpath $(dirname "$currentversion")/../../) --link=$(realpath $(dirname "$currentversion")/../../)
742
        fi
743
        printf "\n";;
744
      C|c)
745
        changeDefaultVersion installedversions[@] $(realpath $(dirname "$currentversion")/../../); printf "\n";;
746
      Q|q)
747
        quitScript;;
748
      *) # sanity check (exit with error)
749
        printError "unexpected argument: $userinput\n";;
750
    esac
751
  done
752

    
753
  exit 0
754
}
755

    
756
################################################################################
757
# SCRIPT ENTRY POINT                                                           #
758
################################################################################
759

    
760
main "$@"