support multiple shell arguments (e.g. -v -q)

new verbose output (-v) to echo commands called with exe() before execution

sequencer/sequencer.sh

@@ -13,6 +13,7 @@ VERSION_MINOR=0
 ## Start of generic script part
 
 QUIET=0
+VERBOSE=0
 ERNO=0
 MAX_STEP=255
 ALIAS=
@@ -24,10 +25,12 @@ helpSequencer() {
   echo "Usage: ${0##*/} [OPTIONS] [STEP NUMBER(s) or ALIAS]" 
   echo
   echo " [OPTIONS]"
-  echo "  --help, -h   : Display help"
-  echo "  --quiet, -q  : Don't ask for permission to execute steps"
-  echo "                 If called without starting step number, only this help is shown"
-  echo "  --version,-v : Display version of sequencer and revision of sequence"
+  echo "  --help, -h    : Display help"
+  echo "  --quiet, -q   : Don't ask for permission to execute steps"
+  echo "                  If called without starting step number, only this help is shown"
+  echo "  --verbose, -v : Verbose output (use exe() function to call shell commands in seqs)"
+  echo "                  ( e.g.: exe apt update )"
+  echo "  --version     : Display version of sequencer and revision of sequence"
   echo 
   echo " [STEP NUMBER(s) 1-${MAX_STEP} or ALIAS]"
   echo "     Single STEP or ALIAS : starting point of process"
@@ -331,29 +334,46 @@ showVersion() {
   fi
 }
 
+exe() {
+  arr=("$@")
+  if [ $VERBOSE -eq 1 ] ; then
+    (set -x; "${arr[@]}")
+  else
+    "${arr[@]}"
+  fi
+}
+
 main() {
   local START=0
 
-  # option check
-  case "$1" in
-    --help|-h) # show only help
-      displayHelp
-      exit 0;
-      ;;
-    --quiet|-q) # detect if option quiet is available
-      QUIET=1
-      shift
-      ;;
-    --version|-v) # version request
-      showVersion
-      exit 0;
-      ;;
-    "") # Empty -> show help
-      displayHelp
-      # Assume starting at one for interactive mode
-      START=1
-      ;;
-  esac
+  # options check
+  for arg in "$@" ; do
+    case "$arg" in
+      --help|-h) # show only help
+        displayHelp
+        exit 0;
+        ;;
+      --quiet|-q) # detect if option quiet is available
+        QUIET=1
+        shift
+        ;;
+      --verbose|-v) # set verbose flag
+        VERBOSE=1
+        shift
+        ;;
+      --version) # version request
+        showVersion
+        exit 0;
+        ;;
+    esac
+  done
+
+  if [ -z $1 ] || [ "$1" == "" ] ; then
+    # Empty -> show help
+    displayHelp
+    # Assume starting at one for interactive mode
+    START=1
+  fi
 
   # compatibility check of sequence
   if [ ! -z $VERSION_SEQREV ] && [ $VERSION_SEQREV -gt $VERSION_REV ] ; then