Systemd/coccinelle/run-coccinelle.sh
Zbigniew Jędrzejewski-Szmek 3b253ad689 cocinelle: use GNU parallel to run spatch
spatch is single-threaded, i.e. slow. On my machine it allocates 5 GB of memory
and starts swapping, which makes it even slower. Using parallel makes the whole
thing pleasantly fast.
2018-06-13 10:52:33 +02:00

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#!/bin/bash -e
top="$(git rev-parse --show-toplevel)"
files="$(git ls-files ':/*.[ch]')"
args=
case "$1" in
-i)
args="$args --in-place"
shift
;;
esac
if ! parallel -h >/dev/null; then
echo 'Please install GNU parallel (package "parallel")'
exit 1
fi
for SCRIPT in ${@-$top/coccinelle/*.cocci} ; do
echo "--x-- Processing $SCRIPT --x--"
TMPFILE=`mktemp`
echo "+ spatch --sp-file $SCRIPT $args ..."
parallel --halt now,fail=1 --keep-order --noswap --max-args=20 \
spatch --sp-file $SCRIPT $args ::: $files \
2>"$TMPFILE" || cat "$TMPFILE"
echo -e "--x-- Processed $SCRIPT --x--\n"
done