ENH: abort if rsync is missing - foamCopySettings, foamNewCase

bin/foamCopySettings

@@ -37,9 +37,12 @@
 #     to add any custom rsync options.
 #-------------------------------------------------------------------------------
 Script=${0##*/}
-if [ "$1" = "-h" -o "$1" = "-help" -o "$#" -ne 2 ]
-then
+
+#------------------------------------------------------------------------------
+usage() {
+    while [ "$#" -ge 1 ]; do echo "$1" 1>&2; shift; done
     cat <<USAGE 1>&2
+
 Usage: $Script srcDir dstDir
 
     Copy OpenFOAM settings from one case to another, without copying
@@ -52,7 +55,29 @@ Note
 
 USAGE
     exit 1
-fi
+}
+#------------------------------------------------------------------------------
+
+# parse options
+while [ "$#" -gt 0 ]
+do
+    case "$1" in
+    -h | -help)
+        usage
+        ;;
+    -*)
+        usage "unknown option: '$*'"
+        ;;
+    *)
+        break
+        ;;
+    esac
+done
+
+# need rsync
+type rsync >/dev/null 2>&1 || usage "Error: 'rsync' seems to be missing"
+
+[ "$#" -eq 2 ] || usage "Error: incorrect number of arguments"
 
 srcDir=${1%/}
 dstDir=${2%/}

bin/foamNewCase

@@ -55,7 +55,6 @@ USAGE
     exit 1
 }
 #------------------------------------------------------------------------------
-
 unset appName caseName listOpt
 
 # parse options
@@ -84,12 +83,19 @@ do
         version="$2"
         shift 2
         ;;
+    -*)
+        usage "unknown option: '$*'"
+        ;;
     *)
-        usage "unknown option/argument: '$*'"
+        usage "unexpected argument: '$*'"
         ;;
     esac
 done
 
+# need rsync, except for when listing
+type rsync >/dev/null 2>&1 || [ "$listOpt" = true ] || usage "Error: 'rsync' seems to be missing"
+
+
 #------------------------------------------------------------------------------
 
 [ -n "$version" ] || {