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#!/bin/sh
set -eu
# Performs `cat` and `grep` simultaneously for `run-make` tests in the Rust CI.
#
# This program will read lines from stdin and print them to stdout immediately.
# At the same time, it will check if the input line contains the substring or
# regex specified in the command line. If any match is found, the program will
# set the exit code to 0, otherwise 1.
#
# This is written to simplify debugging runmake tests. Since `grep` swallows all
# output, when a test involving `grep` failed, it is impossible to know the
# reason just by reading the failure log. While it is possible to `tee` the
# output into another stream, it becomes pretty annoying to do this for all test
# cases.
USAGE='
cat-and-grep.sh [-v] [-e] [-i] s1 s2 s3 ... < input.txt
Prints the stdin, and exits successfully only if all of `sN` can be found in
some lines of the input.
Options:
-v Invert match, exits successfully only if all of `sN` cannot be found
-e Regex search, search using extended Regex instead of fixed string
-i Case insensitive search.
'
GREPPER=grep
INVERT=0
GREPFLAGS='q'
while getopts ':vieh' OPTION; do
case "$OPTION" in
v)
INVERT=1
ERROR_MSG='should not be found'
;;
i)
GREPFLAGS="i$GREPFLAGS"
;;
e)
GREPFLAGS="E$GREPFLAGS"
;;
h)
echo "$USAGE"
exit 2
;;
*)
break
;;
esac
done
if ! echo "$GREPFLAGS" | grep -q E
then
# use F flag if there is not an E flag
GREPFLAGS="F$GREPFLAGS"
fi
shift $((OPTIND - 1))
# use gnu version of tool if available (for bsd)
if command -v "g${GREPPER}"; then
GREPPER="g${GREPPER}"
fi
LOG=$(mktemp -t cgrep.XXXXXX)
trap "rm -f $LOG" EXIT
printf "[[[ begin stdout ]]]\n\033[90m"
tee "$LOG"
echo >> "$LOG" # ensure at least 1 line of output, otherwise `grep -v` may unconditionally fail.
printf "\033[0m\n[[[ end stdout ]]]\n"
HAS_ERROR=0
for MATCH in "$@"; do
if "$GREPPER" "-$GREPFLAGS" -- "$MATCH" "$LOG"; then
if [ "$INVERT" = 1 ]; then
printf "\033[1;31mError: should not match: %s\033[0m\n" "$MATCH"
HAS_ERROR=1
fi
else
if [ "$INVERT" = 0 ]; then
printf "\033[1;31mError: cannot match: %s\033[0m\n" "$MATCH"
HAS_ERROR=1
fi
fi
done
exit "$HAS_ERROR"
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