nnn/plugins/.nmv

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#!/usr/bin/env bash
# Description: An almost fully POSIX compliant batch file renamer
#
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# Note: nnn auto-detects and invokes this plugin if available
# Whitespace is used as delimiter for read.
# The plugin doesn't support filenames with leading or trailing whitespace
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#
# Capabilities:
# 1. Basic file rename
# 2. Detects order change
# 3. Can move files
# 4. Can remove files
# 5. Switch number pairs to swap filenames
#
# Shell: bash
# Author: KlzXS
EDITOR="${EDITOR:-vi}"
TMPDIR="${TMPDIR:-/tmp}"
INCLUDE_HIDDEN="${INCLUDE_HIDDEN:-0}"
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VERBOSE="${VERBOSE:-0}"
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selection=${NNN_SEL:-${XDG_CONFIG_HOME:-$HOME/.config}/nnn/.selection}
exit_status=0
dst_file=$(mktemp "$TMPDIR/.nnnXXXXXX")
if [ -s "$selection" ]; then
printf "Rename 'c'urrent / 's'election? "
read -r resp
if ! [ "$resp" = "c" ] && ! [ "$resp" = "s" ]; then
exit 1
fi
fi
if [ "$resp" = "s" ]; then
arr=$(tr '\0' '\n' < "$selection")
else
if [ "$INCLUDE_HIDDEN" -eq 0 ]; then
arr=$(find . ! -name . -prune ! -name ".*" -print | sort)
else
arr=$(find . ! -name . -prune -print | sort)
fi
fi
lines=$(printf "%s\n" "$arr" | wc -l)
width=${#lines}
printf "%s" "$arr" | awk '{printf("%'"${width}"'d %s\n", NR, $0)}' > "$dst_file"
items=("~")
while IFS='' read -r line; do
items+=("$line");
done < <(printf "%s\n" "$arr")
$EDITOR "$dst_file"
while read -r num name; do
if [ -z "$name" ]; then
if [ -z "$num" ]; then
continue
fi
printf "%s: unable to parse line, aborting\n" "$0"
exit 1
fi
# check if $num is an integer
if [ ! "$num" -eq "$num" ] 2> /dev/null; then
printf "%s: unable to parse line, aborting\n" "$0"
exit 1
fi
src=${items[$num]}
if [ -z "$src" ]; then
printf "%s: unknown item number %s\n" "$0" "$num" > /dev/stderr
continue
elif [ "$name" != "$src" ]; then
if [ -z "$name" ]; then
continue
fi
if [ ! -e "$src" ] && [ ! -L "$src" ]; then
printf "%s: %s does not exit\n" "$0" "$src" > /dev/stderr
unset "items[$num]"
continue
fi
# handle swaps
if [ -e "$name" ] || [ -L "$name" ]; then
tmp="$name~"
c=0
while [ -e "$tmp" ] || [ -L "$tmp" ]; do
c=$((c+1))
tmp="$tmp~$c"
done
if mv "$name" "$tmp"; then
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if [ "$VERBOSE" -ne 0 ]; then
printf "'%s' -> '%s'\n" "$name" "$tmp"
fi
else
printf "%s: failed to rename %s to %s: %s\n" "$0" "$name" "$tmp" "$!" > /dev/stderr
exit_status=1
fi
for key in "${!items[@]}"; do
if [ "${items[$key]}" = "$name" ]; then
items[$key]="$tmp"
fi
done
fi
dir=$(dirname "$name")
if [ ! -d "$dir" ] && ! mkdir -p "$dir"; then
printf "%s: failed to create directory tree %s\n" "$0" "$dir" > /dev/stderr
exit_status=1
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elif ! mv -i "$src" "$name"; then
printf "%s: failed to rename %s to %s: %s\n" "$0" "$name" "$tmp" "$!" > /dev/stderr
exit_status=1
else
if [ -d "$name" ]; then
for key in "${!items[@]}"; do
items[$key]=$(printf "%s" "${items[$key]}" | sed "s|^$src\(\$\|\/\)|$name\1|")
done
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if [ "$VERBOSE" -ne 0 ]; then
printf "'%s' => '%s'\n" "$src" "$name"
fi
else
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true
if [ "$VERBOSE" -ne 0 ]; then
printf "'%s' -> '%s'\n" "$src" "$name"
fi
fi
fi
fi
unset "items[$num]"
done <"$dst_file"
unset "items[0]"
for item in "${items[@]}"; do
rm -ri "$item"
done
rm "$dst_file"
exit $exit_status