Add sequential operation support to hgforest

The output of hgforest can be a little confusing when trying to push/status/in using the hgforest.sh script. This is because the script runs several jobs in parallel, and the output overlaps.

This issue would like to add an option to support sequential operation of commands. It is off by default.

diff --git a/common/bin/hgforest.sh b/common/bin/hgforest.sh
--- a/common/bin/hgforest.sh
+++ b/common/bin/hgforest.sh
@@ -29,6 +29,7 @@
 status_output="/dev/stdout"
 qflag="false"
 vflag="false"
+sflag="false"
 while [ $# -gt 0 ]
 do
   case $1 in
@@ -43,6 +44,10 @@
       global_opts="${global_opts} -v"
       ;;
 
+ -s | --sequential )
+ sflag="true"
+ ;;
+
     '--' ) # no more options
       shift; break
       ;;
@@ -63,7 +68,7 @@
 command_args="$@"
 
 usage() {
- echo "usage: $0 [-q|--quiet] [-v|--verbose] [--] <command> [commands...]" > ${status_output}
+ echo "usage: $0 [-q|--quiet] [-v|--verbose] [-s|--sequential] [--] <command> [commands...]" > ${status_output}
       exit 1
 }
 
@@ -243,11 +248,15 @@
       ) 2>&1 | sed -e "s@^@${reponame}: @" > ${status_output}
     ) &
 
- if [ `expr ${n} '%' ${at_a_time}` -eq 0 ] ; then
+ if [ `expr ${n} '%' ${at_a_time}` -eq 0 -a "${sflag}" = "false" ] ; then
       sleep 2
       echo "Waiting 5 secs before spawning next background command." > ${status_output}
       sleep 3
     fi
+
+ if [ "${sflag}" = "true" ] ; then
+ wait
+ fi
   done
 fi