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8041151: More concurrent hgforest

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Reviewed-by: chegar, erikj, sla
This commit is contained in:
Mike Duigou 2014-04-11 10:31:20 -07:00
parent d353df3912
commit e2d82e9cd7
1 changed files with 54 additions and 12 deletions
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66
common/bin/hgforest.sh
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@ -72,12 +72,21 @@ usage() {
exit 1
}
if [ "x" = "x$command" ] ; then
echo "ERROR: No command to hg supplied!"
usage
fi
# Check if we can use fifos for monitoring sub-process completion.
on_windows=`uname -s | egrep -ic -e 'cygwin|msys'`
if [ ${on_windows} = "1" ]; then
# cygwin has (2014-04-18) broken (single writer only) FIFOs
# msys has (2014-04-18) no FIFOs.
have_fifos="false"
else
have_fifos="true"
fi
# Clean out the temporary directory that stores the pid files.
tmp=/tmp/forest.$$
rm -f -r ${tmp}
@ -210,7 +219,19 @@ if [ "${command}" = "serve" ] ; then
) &
else
# Run the supplied command on all repos in parallel.
# n is the number of subprocess started or which might still be running.
n=0
if [ $have_fifos = "true" ]; then
# if we have fifos use them to detect command completion.
mkfifo ${tmp}/fifo
exec 3<>${tmp}/fifo
if [ "${sflag}" = "true" ] ; then
# force sequential
at_a_time=1
fi
fi
for i in ${repos} ${repos_extra} ; do
n=`expr ${n} '+' 1`
repopidfile=`echo ${i} | sed -e 's@./@@' -e 's@/@_@g'`
@ -221,10 +242,11 @@ else
pull_base="${pull_extra}"
fi
done
pull_base="`echo ${pull_base} | sed -e 's@[/]*$@@'`"
(
(
if [ "${command}" = "clone" -o "${command}" = "fclone" -o "${command}" = "tclone" ] ; then
pull_newrepo="`echo ${pull_base}/${i} | sed -e 's@\([^:]/\)//*@\1@g'`"
pull_newrepo="${pull_base}/${i}"
path="`dirname ${i}`"
if [ "${path}" != "." ] ; then
times=0
@ -237,7 +259,7 @@ else
sleep 5
done
fi
echo "hg clone ${pull_newrepo} ${i}" > ${status_output}
echo "hg${global_opts} clone ${pull_newrepo} ${i}" > ${status_output}
(PYTHONUNBUFFERED=true hg${global_opts} clone ${pull_newrepo} ${i}; echo "$?" > ${tmp}/${repopidfile}.pid.rc ) 2>&1 &
else
echo "cd ${i} && hg${global_opts} ${command} ${command_args}" > ${status_output}
@ -246,21 +268,41 @@ else
echo $! > ${tmp}/${repopidfile}.pid
) 2>&1 | sed -e "s@^@${reponame}: @" > ${status_output}
if [ $have_fifos = "true" ]; then
echo "${reponame}" >&3
fi
) &
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
if [ $have_fifos = "true" ]; then
# check on count of running subprocesses and possibly wait for completion
if [ ${at_a_time} -lt ${n} ] ; then
# read will block until there are completed subprocesses
while read repo_done; do
n=`expr ${n} '-' 1`
if [ ${n} -lt ${at_a_time} ] ; then
# we should start more subprocesses
break;
fi
done <&3
fi
else
if [ "${sflag}" = "false" ] ; then
# Compare completions to starts
completed="`(ls -1 ${tmp}/*.pid.rc 2> /dev/null | wc -l) || echo 0`"
while [ ${at_a_time} -lt `expr ${n} '-' ${completed}` ] ; do
# sleep a short time to give time for something to complete
sleep 1
completed="`(ls -1 ${tmp}/*.pid.rc 2> /dev/null | wc -l) || echo 0`"
done
else
# complete this task before starting another.
wait
fi
fi
done
fi
# Wait for all hg commands to complete
# Wait for all subprocesses to complete
wait
# Terminate with exit 0 only if all subprocesses were successful
@ -270,7 +312,7 @@ if [ -d ${tmp} ]; then
exit_code=`cat ${rc} | tr -d ' \n\r'`
if [ "${exit_code}" != "0" ] ; then
repo="`echo ${rc} | sed -e s@^${tmp}@@ -e 's@/*\([^/]*\)\.pid\.rc$@\1@' -e 's@_@/@g'`"
echo "WARNING: ${repo} exited abnormally." > ${status_output}
echo "WARNING: ${repo} exited abnormally ($exit_code)" > ${status_output}
ec=1
fi
done