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|
#!/bin/sh
set -eu
usage() {
cat <<-'EOF'
Usage:
x COMMANDS... [ '&&' / '||' / '|' ] COMMANDS...
x -h
EOF
}
help() {
cat <<-'EOF'
Options:
-h, --help show this message
COMMAND the command to be executed
&& "AND" logical operator
|| "OR" logical operator
| pipe operator
Run command chained together with operators.
Examples:
Measure the time of two commands:
$ time x sleep 1 '&&' sleep 2
# same as:
$ time sh -c 'sleep 1 && sleep 2'
Notify when either of the commands finish:
$ boop x cmd-1 '||' cmd-2
EOF
}
for flag in "$@"; do
case "$flag" in
--)
break
;;
--help)
usage
help
exit
;;
*)
;;
esac
done
while getopts 'h' flag; do
case "$flag" in
h)
usage
help
exit
;;
*)
usage >&2
exit 2
;;
esac
done
shift $((OPTIND - 1))
CMD=''
for arg in "$@"; do
case "$arg" in
'&&'|'||')
set +e
sh -c "$CMD"
STATUS=$?
set -e
CMD=''
if [ "$arg" = '&&' ] && [ "$STATUS" != 0 ]; then
exit "$STATUS"
elif [ "$arg" = '||' ] && [ "$STATUS" = 0 ]; then
exit 0
fi
;;
*)
CMD="$CMD${CMD:+ }'$arg'"
;;
esac
done
sh -c "$CMD"
|
