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#!/usr/bin/env bash
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# fzf-tmux: starts fzf in a tmux pane
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# usage: fzf-tmux [-u|-d [HEIGHT[%]]] [-l|-r [WIDTH[%]]] [--] [FZF OPTIONS]
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fail() {
>&2 echo "$1"
exit 2
}
fzf="$(command -v fzf 2> /dev/null)" || fzf="$(dirname "$0")/fzf"
[[ -x "$fzf" ]] || fail 'fzf executable not found'
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args=()
opt=""
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skip=""
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swap=""
close=""
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term=""
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[[ -n "$LINES" ]] && lines=$LINES || lines=$(tput lines)
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[[ -n "$COLUMNS" ]] && columns=$COLUMNS || columns=$(tput cols)
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help() {
>&2 echo 'usage: fzf-tmux [-u|-d [HEIGHT[%]]] [-l|-r [WIDTH[%]]] [--] [FZF OPTIONS]
Layout
-u [HEIGHT[%]] Split above (up)
-d [HEIGHT[%]] Split below (down)
-l [WIDTH[%]] Split left
-r [WIDTH[%]] Split right
(default: -d 50%)
'
exit
}
while [[ $# -gt 0 ]]; do
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arg="$1"
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shift
[[ -z "$skip" ]] && case "$arg" in
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-)
term=1
;;
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--help)
help
;;
--version)
echo "fzf-tmux (with fzf $("$fzf" --version))"
exit
;;
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-w*|-h*|-d*|-u*|-r*|-l*)
if [[ "$arg" =~ ^.[lrw] ]]; then
opt="-h"
if [[ "$arg" =~ ^.l ]]; then
opt="$opt -d"
swap="; swap-pane -D ; select-pane -L"
close="; tmux swap-pane -D"
fi
else
opt=""
if [[ "$arg" =~ ^.u ]]; then
opt="$opt -d"
swap="; swap-pane -D ; select-pane -U"
close="; tmux swap-pane -D"
fi
fi
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if [[ ${#arg} -gt 2 ]]; then
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size="${arg:2}"
else
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if [[ "$1" =~ ^[0-9]+%?$ ]]; then
size="$1"
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shift
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else
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continue
fi
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fi
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if [[ "$size" =~ %$ ]]; then
size=${size:0:((${#size}-1))}
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if [[ -n "$swap" ]]; then
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opt="$opt -p $(( 100 - size ))"
else
opt="$opt -p $size"
fi
else
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if [[ -n "$swap" ]]; then
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if [[ "$arg" =~ ^.l ]]; then
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max=$columns
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else
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max=$lines
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fi
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size=$(( max - size ))
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[[ $size -lt 0 ]] && size=0
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opt="$opt -l $size"
else
opt="$opt -l $size"
fi
fi
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;;
--)
# "--" can be used to separate fzf-tmux options from fzf options to
# avoid conflicts
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skip=1
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continue
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;;
*)
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args+=("$arg")
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;;
esac
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[[ -n "$skip" ]] && args+=("$arg")
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done
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if [[ -z "$TMUX" || "$opt" =~ ^-h && "$columns" -le 40 || ! "$opt" =~ ^-h && "$lines" -le 15 ]]; then
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"$fzf" "${args[@]}"
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exit $?
fi
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# --height option is not allowed
args+=("--no-height")
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# Handle zoomed tmux pane by moving it to a temp window
if tmux list-panes -F '#F' | grep -q Z; then
zoomed=1
original_window=$(tmux display-message -p "#{window_id}")
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tmp_window=$(tmux new-window -d -P -F "#{window_id}" "bash -c 'while :; do for c in \\| / - '\\;' do sleep 0.2; printf \"\\r\$c fzf-tmux is running\\r\"; done; done'")
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tmux swap-pane -t $tmp_window \; select-window -t $tmp_window
fi
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set -e
# Clean up named pipes on exit
id=$RANDOM
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argsf="${TMPDIR:-/tmp}/fzf-args-$id"
fifo1="${TMPDIR:-/tmp}/fzf-fifo1-$id"
fifo2="${TMPDIR:-/tmp}/fzf-fifo2-$id"
fifo3="${TMPDIR:-/tmp}/fzf-fifo3-$id"
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cleanup() {
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\rm -f $argsf $fifo1 $fifo2 $fifo3
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# Remove temp window if we were zoomed
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if [[ -n "$zoomed" ]]; then
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tmux display-message -p "#{window_id}" > /dev/null
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tmux swap-pane -t $original_window \; \
select-window -t $original_window \; \
kill-window -t $tmp_window \; \
resize-pane -Z
fi
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if [ $# -gt 0 ]; then
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trap - EXIT
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exit 130
fi
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}
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trap 'cleanup 1' SIGUSR1
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trap 'cleanup' EXIT
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envs="env TERM=$TERM "
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[[ -n "$FZF_DEFAULT_OPTS" ]] && envs="$envs FZF_DEFAULT_OPTS=$(printf %q "$FZF_DEFAULT_OPTS")"
[[ -n "$FZF_DEFAULT_COMMAND" ]] && envs="$envs FZF_DEFAULT_COMMAND=$(printf %q "$FZF_DEFAULT_COMMAND")"
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mkfifo -m o+w $fifo2
mkfifo -m o+w $fifo3
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# Build arguments to fzf
opts=""
for arg in "${args[@]}"; do
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arg="${arg//\\/\\\\}"
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arg="${arg//\"/\\\"}"
arg="${arg//\`/\\\`}"
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arg="${arg//$/\\$}"
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opts="$opts \"$arg\""
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done
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pppid=$$
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echo -n "trap 'kill -SIGUSR1 -$pppid' EXIT SIGINT SIGTERM;" > $argsf
close="; trap - EXIT SIGINT SIGTERM $close"
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if [[ -n "$term" ]] || [[ -t 0 ]]; then
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cat <<< "\"$fzf\" $opts > $fifo2; echo \$? > $fifo3 $close" >> $argsf
cat $argsf
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TMUX=$(echo $TMUX | cut -d , -f 1,2) tmux set-window-option synchronize-panes off \;\
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set-window-option remain-on-exit off \;\
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split-window $opt "cd $(printf %q "$PWD");$envs bash $argsf" $swap \
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> /dev/null 2>&1
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else
mkfifo $fifo1
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cat <<< "\"$fzf\" $opts < $fifo1 > $fifo2; echo \$? > $fifo3 $close" >> $argsf
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TMUX=$(echo $TMUX | cut -d , -f 1,2) tmux set-window-option synchronize-panes off \;\
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set-window-option remain-on-exit off \;\
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split-window $opt "$envs bash $argsf" $swap \
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> /dev/null 2>&1
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cat <&0 > $fifo1 &
fi
cat $fifo2
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exit "$(cat $fifo3)"
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