nnn/plugins/finder

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#!/usr/bin/env bash
# Description: Run custom search and list results in smart context
#
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# Note: This plugin retains search history
#
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# Usage:
# Run plugin and enter e.g. "-size +10M" to list files in current
# directory larger than 10M. By default entered expressions are
# interpreted as arguments to find. Results have to be NUL
# terminated which is done by default for find. Alternatively one
# can prepend a '$' to run a custom search program such as fd or
# ripgrep. Entered expressions will be saved in history file to
# be listed as bookmarks and and can be entered by index and edited.
#
# Shell: Bash
# Author: Arun Prakash Jana, Luuk van Baal
TMPDIR="${TMPDIR:-/tmp}"
NNN_FINDHIST="${NNN_FINDHIST:-${XDG_CONFIG_HOME:-$HOME/.config}/nnn/finderbms}"
NNN_FINDHISTLEN="${NNN_FINDHISTLEN:-10000}"
printexamples() {
printf -- "-maxdepth 1 -name pattern
-maxdepth 1 -size +100M
\$fd -0 pattern
\$fd -0 -d 2 -S +100M
\$grep -rlZ pattern
\$rg -l0 pattern
\$fzf -m | tr '\\\n' '\\\0'\n"
}
printexprs() {
for ((i = "$1"; i < ${#fexprs[@]}; i++)); do
printf '%s\t%s\n' "$((i + 1))" "${fexprs[$i]}"
done
}
mapexpr() {
if [ "$fexpr" -eq "$fexpr" ] 2>/dev/null; then
fexpr=${fexprs[$((fexpr - 1))]}
read -r -e -p "Search expression: " -i "$fexpr" fexpr
else
return 1
fi
}
readexpr() {
case "$fexpr" in
h) clear
printf "Examples:\n"
mapfile -t fexprs < <(printexamples)
printexprs 0
read -r -p "Search expression or index: " fexpr
mapexpr
[ -n "$fexpr" ] && readexpr ;;
\$*) cmd="${fexpr:1}" ;;
*) mapexpr && readexpr
cmd="find $fexpr -print0" ;;
esac
}
clear
[ -f "$NNN_FINDHIST" ] || printexamples > "$NNN_FINDHIST"
mapfile -t fexprs < <(sort "$NNN_FINDHIST" | uniq -c | sort -nr | head -n5 |\
awk '{for (i=2; i<NF; i++) printf $i " "; print $NF}')
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printf "Most used search expressions:\n"
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printexprs 0
mapfile -t -O"$i" fexprs < <(tac "$NNN_FINDHIST" | awk '!a[$0]++' | head -n5)
printf "Most recently used search expressions:\n"
printexprs "$i"
read -r -p "Search expression or index (h for help): " fexpr
mapexpr
if [ -n "$fexpr" ]; then
printf "+l" > "$NNN_PIPE"
while :; do
readexpr
eval "$cmd" > "$NNN_PIPE" && break
read -r -e -p "Search expression: " -i "$fexpr" fexpr
done
if [ -n "$fexpr" ]; then
tail -n"$NNN_FINDHISTLEN" "$NNN_FINDHIST" > "$TMPDIR/finderbms"
printf "%s\n" "$fexpr" >> "$TMPDIR/finderbms"
mv "$TMPDIR/finderbms" "$NNN_FINDHIST"
fi
fi