void-packages/common/environment/setup/vsed.sh
2019-01-16 17:25:46 -02:00

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# Helper function for calling sed on files and checking if the
# file is actually changed
#
# NOTE: this will not check if the input is valid, you can problably
# make it execute arbirtrary commands via passing '; cmd' to a vsed
# call.
vsed() {
local files=() regexes=() OPTIND
while getopts ":i:e:" opt; do
case $opt in
i) files+=("$OPTARG") ;;
e) regexes+=("$OPTARG") ;;
*) ;;
esac
done
if [ ${#files[@]} -eq 0 ]; then
msg_red "$pkgver: vsed: no files specified with -i.\n"
return 1
fi
if [ ${#regexes[@]} -eq 0 ]; then
msg_red "$pkgver: vsed: no regexes specified with -e.\n"
return 1
fi
for rx in "${regexes[@]}"; do
for f in "${files[@]}"; do
shasums="$(sha256sum "$f" 2>/dev/null | awk '{print $1}')"
sed -i "$f" -e "$rx" || {
msg_red "$pkgver: vsed: sed call failed with regex \"$rx\" on file \"$f\"\n"
return 1
}
sha256sum="$(sha256sum "$f" 2>/dev/null)"
if [ "$shasums" = "${sha256sum%% *}" ]; then
msg_warn "$pkgver: vsed: regex \"$rx\" didn't change file \"$f\"\n"
fi
done
done
}