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|
#!/bin/sh
set -eu
usage() {
printf 'Usage: %s -p PROFILE -c COMMAND\n' "$0"
}
help() {
cat <<EOF
Options:
-p PROFILE profile to be used for gathering and storing data
-c COMMAND command to be run, reading from STDIN, writing to STDOUT
-h, --help show this help
-V, --version print the version number
See "man remembering" for more information.
EOF
}
version() {
printf 'remembering-@VERSION@ @DATE@\n'
}
missing() {
printf 'Missing option: %s\n' "$1"
}
# shellcheck disable=2068
for flag in $@; do
if [ "$flag" = '--help' ]; then
usage
help
exit
elif [ "$flag" = '--version' ]; then
version
exit
fi
done
COMMANDFLAG=
PROFILEFLAG=
while getopts 'hc:p:V' name; do
case "$name" in
c)
COMMANDFLAG="$OPTARG"
;;
p)
PROFILEFLAG="$OPTARG"
;;
h)
usage
help
exit
;;
V)
version
exit
;;
*)
printf 'Ignoring unrecognized flag "%s"' "$name" >&2
;;
esac
done
if [ -z "$COMMANDFLAG" ]; then
missing '-c COMMAND' >&2
usage >&2
exit 2
fi
if [ -z "$PROFILEFLAG" ]; then
missing '-p PROFILE' >&2
usage >&2
exit 2
fi
COMMAND="$COMMANDFLAG"
PROFILE="${XDG_DATA_HOME:-$HOME/.local/share/remembering}/$PROFILEFLAG"
if [ ! -e "$PROFILE" ]; then
mkdir -p "$(dirname "$PROFILE")"
touch "$PROFILE"
fi
MERGED="$(mktemp)"
FILTERED="$(mktemp)"
SORTED_STDIN="$(mktemp)"
cat - > "$SORTED_STDIN"
# sed line to reverse lines, replacing GNU/Linux's tac
# Taken from:
# https://unix.stackexchange.com/questions/280685/reverse-sequence-of-a-file-with-posix-tools/280686#comment601716_280686
xargs -I{} printf '0:%s\n' "{}" < "$SORTED_STDIN" | \
sort -t: -k2,2 -m - "$PROFILE" | \
sed '1!x;H;1h;$!d;g' | \
sort -t: -k2,2 -u > "$MERGED"
xargs -I{} printf 'filter_marker:%s\n' "{}" < "$SORTED_STDIN" | \
cat - "$PROFILE" | \
sort -t: -k2,2 | \
awk '{
split($0, l, ":")
rank = l[1]
entry = substr($0, length(rank) + 2)
if (rank != "filter_marker") {
prev_rank = rank
prev_entry = entry
} else {
if (prev_entry == entry) {
print prev_rank ":" entry
} else {
print "0:" entry
}
}
}' > "$FILTERED"
CHOICE="$(sort -t: -k1nr,1 -k2,2 < "$FILTERED" | \
cut -d: -f2- | \
sh -c "$COMMAND")"
if [ -n "$CHOICE" ]; then
NEW_PROFILE="$(mktemp)"
awk -v choice="$CHOICE" '{
split($0, l, ":")
rank = l[1]
entry = substr($0, length(rank) + 2)
if (entry == choice) {
# Naively increment ranking by one
print rank + 1 ":" entry
} else {
print rank ":" entry
}
}' "$MERGED" > "$NEW_PROFILE"
mv "$NEW_PROFILE" "$PROFILE"
printf '%s\n' "$CHOICE"
fi
|
