fixes #2

Introduce versioning to sequencer and seqs

Refactored sequencer option handling

More robust way to include sequencer.sh to seqs

sequencer/sequencer.sh

@@ -4,25 +4,34 @@
 ## which uses the sequencer.sh to provide sequencial operations with or without
 ## user interaction (see seqTemplate.sh)
 
+## Version information
+
+VERSION_REV=1
+VERSION_MAJOR=0
+VERSION_MINOR=0
+
 ## Start of generic script part
 
 QUIET=0
 ERNO=0
 MAX_STEP=255
 TEMPLATE_NAME=seqTemplateExample.sh
+VERSION_STRING="${VERSION_REV}.${VERSION_MAJOR}.${VERSION_MINOR}"
 
 function helpSequencer() {
   echo "Usage: ${0##*/} [Options] [Step Number(s)]" 
   echo
-  echo "  [Options]"
-  echo "    -q : Don't ask for permission to execute next step"
-  echo "         If called without starting step number only this help is shown"
+  echo " [Options]"
+  echo "  --help, -h   : Display help"
+  echo "  --quiet, -q  : Don't ask for permission to execute steps"
+  echo "                 If called without starting step number, only this help is shown"
+  echo "  --version,-v : Display version of sequencer and revision of sequence"
   echo 
-  echo "  [Step Number(s) 1-${MAX_STEP}]"
-  echo "      Single step number  : starting point of process"
-  echo "    Multiple step numbers : execute only given steps"
-  echo "                            execute only one step with using special step 0"
-  echo "                            ( e.g. only execute step 4: $0 4 0 )"
+  echo " [Step Number(s) 1-${MAX_STEP}]"
+  echo "     Single step number  : starting point of process"
+  echo "   Multiple step numbers : execute only given steps"
+  echo "                           execute only one step with using special step 0"
+  echo "                           ( e.g. only execute step 4: $0 4 0 )"
 }
 
 # endCheckEmpty [VariableName] [DESCRIPTION]
@@ -217,24 +226,62 @@ function displayHelp() {
   fi
 }
 
+# showVersion
+function showVersion() {
+  echo    "Sequencer    ${VERSION_STRING}"
+  echo -n "Seq Revision "
+  if [ ! -z "${VERSION_SEQREV}" ] ; then
+    echo "${VERSION_SEQREV}"
+  else
+    echo "-"
+  fi
+}
+
 main() {
-  # detect if option quiet is available
-  if [ ! -z "$1" ] && [ $1 == "-q" ] ; then
-    QUIET=1
-    shift
+  local START=0
+
+  # option check
+  case "$1" in
+    --help|-h) # show only help
+      displayHelp
+      exit 0;
+      ;;
+    --quiet|-q) # detect if option quiet is available
+      QUIET=1
+      shift
+      ;;
+    --version|-v) # version request
+      showVersion
+      exit 0;
+      ;;
+    "") # Empty -> show help
+      displayHelp
+      # Assume starting at one for interactive mode
+      START=1
+      ;;
+  esac
+
+  # compatibility check of sequence
+  if [ ! -z $VERSION_SEQREV ] && [ $VERSION_SEQREV -gt $VERSION_REV ] ; then
+    echo "[ERROR] Unsupported sequence revision"
+    showVersion
+    exit 1
+  fi
+  # TODO exclude older versions if needed
+  if [ -z $VERSION_SEQREV ] ; then
+    echo -e "[WARNING] No sequence revision found. Trying anyway...\n";
   fi
 
-  # display help  
-  if [ -z "$1" ] ; then
-    displayHelp
-    START=1
+  # check for starting step  
+  if [ ! -z "$1" ] ; then
+    START=$1
+  else
+    # End here on quiet mode and no step was given
     if [ $QUIET -eq 1 ] ; then
       exit 1;
     fi
-  else
-    START=$1
   fi
-
+  
   # check if more than one step is given and select execution mode
   if [ ! -z $2 ] ; then
     selection $@