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#!/usr/bin/env bash
# shellcheck source=/dev/null
SHELL_LIBRARY_VERSION="2.1.2" . %SHELL_LIBRARY_PATH
# shellcheck disable=SC2269
f="$f"
# shellcheck disable=SC2269
fx="$fx"
# shellcheck disable=SC2269
fs="$fs"
# shellcheck disable=SC2269
id="$id"
# source: https://github.com/gokcehan/lf/wiki/Tips#use-copy-on-write-when-possible
#
# # FIXME: Add this. The hardest part is in checking, if a file can be reflinked, as fuse and bind mount are hard to
# backtrack <2023-08-29>
# # This was very helpful for debugging:
# log_file="$HOME/lf-reflink-log-$(date +'%Y-%m-%d_%H-%M-%S')"
# [ -f "$log_file" ] || touch "$log_file"
# exec 1>> $log_file 2>&1
# set -x
# In theory, this may fail,
# but I tested it on selection with 10k files - everything worked (bash)
# FIXME: This will very likely fail on dash, when the file number > 255 <2023-08-29>
set -- "$(cat ~/.local/share/lf/files)"
mode="$1"
shift
if [ "$mode" = 'copy' ]; then
# Reflink if all items of selection and the destination are on the
# same mount point and it is CoW fs.
# (to make sure reflink never fails in first place, so we don't have to
# clean up)
src_targets="$(df --output=target -- "$@" | sed '1d' | sort -u)"
if [ "$(df --output=target -- "$PWD" | tail -n 1)" = \
"$(echo "$src_targets" | tail -n 1)" ] &&
(("$(echo "$src_targets" | wc -l)" == 1)) &&
[[ "$(df --output=fstype -- "$PWD" | tail -n 1)" =~ ^(btrfs|xfs|zfs)$ ]]; then
echo 'selected copy and cp reflink paste'
start=$(date '+%s')
# Handle same names in dst
# TODO parallelism, idk - but exit/return/break won't stop the loop from subshell...
for i in "$@"; do
name="${i##*/}"
original="$name"
count=0
while [ -w "$PWD/$name" ]; do
count=$((count + 1))
name="$original.~$count~"
done
set +e
cp_out="$(cp -rn --reflink=always -- "$i" "$PWD/$name" 2>&1)"
set -e
if [ -n "$cp_out" ]; then
lf -remote "send $id echoerr $cp_out"
exit 0
fi
done
finish=$(($(date '+%s') - start))
t=''
if ((finish > 2)); then
t="${finish}s"
fi
# Or just skip a file when names are the same.
# (A LOT faster if you e.g. pasting selection of 10k files)
# cp -rn --reflink=always -- "$@" .
lf -remote "send clear"
green=$'\u001b[32m'
reset=$'\u001b[0m'
lf -remote "send $id echo ${green}reflinked!${reset} $t"
else
echo 'selected copy and lf native paste'
lf -remote "send $id paste"
lf -remote "send clear"
fi
elif [ "$mode" = 'move' ]; then
echo 'selected move and lf native paste'
lf -remote "send $id paste"
lf -remote "send clear"
fi
# # for debug
# set +x
lf -remote "send load"
# vim: ft=sh
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