added the host tagging functionality, and can handle multiple arguments

mhssh

@@ -20,6 +20,7 @@
 # You can specify multiple tags [a-z0-9] for each host, so you can filter easier
 # which hosts to work on
 hosts="$HOME/.config/mhssh.hosts"
+tags=""
 
 red=$(tput setaf 1)
 grn=$(tput setaf 2)
@@ -32,10 +33,9 @@ usage() {
 	echo "Run a single command on multiple hosts"
 	echo "Usage : $0 [-h|--help] [-n|--no-color] [-B|--background] [-D|--detach]
     [-t|--tags tags] CMD ..."
-	echo -e "\n\t-h --help\tprint this help\n\t-n --no-color\tdisable
-    colors\n\t-B --background\tput the task in background\n\t-D --detach\tuse
-    dtach to put the task in background\n\t-t --tags tags\n\n"
-	echo "Host list configured to be found in '$hosts'"
+	echo -e "\n\t-h --help\tprint this help\n\t-n --no-color\tdisable colors\n\t-B --background\tput the task in background\n\t-D --detach\tuse dtach to put the task in background\n\t-t --tags tags (separated by coma)\n\n"
+	echo "Host list configured to be found in '$hosts', in format \"host.name tag1 ... tagn\""
+    echo "Tags are not mandatory for mhssh to work"
 }
 
 nocmd() {
@@ -44,9 +44,21 @@ nocmd() {
 	exit 3
 }
 
+host_filter() {
+    if [[ -z "$tags" ]]
+    then
+       cat $hosts|cut -d' ' -f1
+    else
+        tags="($(echo "$tags"|sed 's/,/\|/g'))"
+        cat $hosts|grep -E $tags|cut -d' ' -f1
+    fi
+}
+
 # arg "parsing"
 [ $# -eq 0 ] && nocmd
-case "$1" in
+while [[ "$#" -gt 0 ]]
+do
+    case "$1" in
         -h|--help)
             usage
             exit 1
@@ -66,7 +78,16 @@ case "$1" in
             shift
             dtch='on'
         ;;
-esac
+        -t|--tags)
+            shift
+            tags=$1
+            shift
+        ;;
+        *)
+            break
+        ;;
+    esac
+done;
 
 if [ ! -f "$hosts" ]
 then
@@ -77,7 +98,7 @@ then
 fi
 
 
-for host in $(cat $hosts)
+for host in $(host_filter)
 do
 	echo -e "\n$grn=====================\n$grn$host\n$grn=====================$raz\n"
 	stdout=$(echo -ne "$grn$(printf "%20s" "$host") : $raz")