tools: parallelize execution

Parallelize renderspec and spec-cleaner executions to speed up scripts.
There is no constraint to run these jobs sequentially

Change-Id: I7bdeee82cc360cf31e9684ef22638f41c53b12b8

tools/run_renderspec.sh

@@ -8,6 +8,7 @@ specdir=${basedir}/openstack/
 WORKSPACE=${WORKSPACE:-$basedir}
 OUTPUTDIR=$WORKSPACE/logs/
 specstyles="suse fedora"
+MAXPROC=4
 
 mkdir -p $OUTPUTDIR
 
@@ -16,11 +17,16 @@ for specstyle in $specstyles; do
     rm -f $OUTPUTDIR/*.${specstyle}
 done
 
+count=0
 echo "run renderspec over specfiles from ${specdir}"
 for spec in ${specdir}/**/*.spec.j2; do
     for specstyle in $specstyles; do
         echo "run ${spec} for ${specstyle}"
         renderspec --spec-style ${specstyle} ${spec} \
-                   -o $WORKSPACE/logs/${spec##*/}.${specstyle}
+                   -o $WORKSPACE/logs/${spec##*/}.${specstyle} &
+        let count+=1
+        [[ count -eq $MAXPROC ]] && wait && count=0
     done
 done
+
+wait

tools/run_speccleaner.sh

@@ -7,18 +7,24 @@ basedir=${1:-$PWD}
 WORKSPACE=${WORKSPACE:-$basedir}
 # tempfile to store the spec-cleaner diff for all specs
 tmpdir=$(mktemp -d)
+MAXPROC=4
 
 echo "run spec-cleaner over specfiles from $WORKSPACE/logs/"
 
+count=0
 # TODO(toabctl): also run spec-cleaner with non-SUSE specs
 # but the current problem is that the license check works for SUSE only
 for spec in $WORKSPACE/logs/*.suse ; do
     # NOTE(toabctl):spec-cleaner can not ignore epochs currently
     sed -i '/^Epoch:.*/d' $spec
     spec-cleaner -m -d --no-copyright --diff-prog "diff -uw" \
-                 $spec > $tmpdir/`basename ${spec}`.cleaner.diff
+                 $spec > $tmpdir/`basename ${spec}`.cleaner.diff &
+    let count+=1
+    [[ count -eq $MAXPROC ]] && wait && count=0
 done
 
+wait
+
 # check if some diffs are available
 failed=0
 for specdiff in $tmpdir/*; do