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https://github.com/jarun/nnn.git
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feat(preview-tui): handle quoting in start_preview more robustly
This commit makes the script more resistant to naughty filenames.
The script now depends on bash for the following features:
- Arrays
Correctly creating and passing argument lists is now simple
- Parameter transformation
`${parameter@Q}` makes it easy to correctly quote a string so that it
can be safely re-evaluated by the interpreter later.
On iTerm, the shell command used to render the preview is now passed to
osascript via a named pipe: `$FIFO_OSASCRIPT`. By not embedding the
shell command directly, we now no longer need to worry about osascript's
quoting rules. It's not perfect, because $SHELL and $TMPDIR might
contain naughty characters, but it's quite unlikely to happen.
This commit is contained in:
musjj
parent
621dbba02e
commit
432b0755d3
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@ -1,4 +1,4 @@
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#!/usr/bin/env sh
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#!/usr/bin/env bash
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# Description: Terminal based file previewer
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#
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@ -89,27 +89,29 @@ NNN_SPLITSIZE=${NNN_SPLITSIZE:-50} # Set previewer split size percentage
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TMPDIR=${TMPDIR:-/tmp}
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NNN_PARENT=${NNN_FIFO#*.}
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[ "$NNN_PARENT" -eq "$NNN_PARENT" ] 2>/dev/null || NNN_PARENT="" # Make empty if non-numeric
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ENVVARS="
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PWD=$PWD
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PATH=$PATH
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PREVIEW_MODE=$2
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NNN_FIFO=$NNN_FIFO
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NNN_SCOPE=${NNN_SCOPE:-0}
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NNN_PISTOL=${NNN_PISTOL:-0}
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NNN_ICONLOOKUP=${NNN_ICONLOOKUP:-0}
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NNN_PAGER=${NNN_PAGER:-less -P?n -R}
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NNN_BATTHEME=${NNN_BATTHEME:-ansi}
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NNN_BATSTYLE=${NNN_BATSTYLE:-numbers}
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NNN_PREVIEWWIDTH=${NNN_PREVIEWWIDTH:-1920}
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NNN_PREVIEWHEIGHT=${NNN_PREVIEWHEIGHT:-1080}
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NNN_PREVIEWDIR=${NNN_PREVIEWDIR:-$TMPDIR/nnn/previews}
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NNN_PREVIEWIMGPROG=${NNN_PREVIEWIMGPROG:-}
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FIFOPID=$TMPDIR/nnn-preview-tui-fifopid.$NNN_PARENT
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FIFOPATH=$TMPDIR/nnn-preview-tui-fifo.$NNN_PARENT
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PREVIEWPID=$TMPDIR/nnn-preview-tui-previewpid.$NNN_PARENT
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CURSEL=$TMPDIR/nnn-preview-tui-selection.$NNN_PARENT
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FIFO_UEBERZUG=$TMPDIR/nnn-preview-tui-ueberzug-fifo.$NNN_PARENT
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POSOFFSET=$TMPDIR/nnn-preview-tui-posoffset"
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ENVVARS=(
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"PWD=$PWD"
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"PATH=$PATH"
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"PREVIEW_MODE=$2"
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"NNN_FIFO=$NNN_FIFO"
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"NNN_SCOPE=${NNN_SCOPE:-0}"
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"NNN_PISTOL=${NNN_PISTOL:-0}"
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"NNN_ICONLOOKUP=${NNN_ICONLOOKUP:-0}"
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"NNN_PAGER=${NNN_PAGER:-less -P?n -R}"
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"NNN_BATTHEME=${NNN_BATTHEME:-ansi}"
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"NNN_BATSTYLE=${NNN_BATSTYLE:-numbers}"
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"NNN_PREVIEWWIDTH=${NNN_PREVIEWWIDTH:-1920}"
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"NNN_PREVIEWHEIGHT=${NNN_PREVIEWHEIGHT:-1080}"
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"NNN_PREVIEWDIR=${NNN_PREVIEWDIR:-$TMPDIR/nnn/previews}"
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"NNN_PREVIEWIMGPROG=${NNN_PREVIEWIMGPROG:-}"
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"FIFOPID=$TMPDIR/nnn-preview-tui-fifopid.$NNN_PARENT"
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"FIFOPATH=$TMPDIR/nnn-preview-tui-fifo.$NNN_PARENT"
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"PREVIEWPID=$TMPDIR/nnn-preview-tui-previewpid.$NNN_PARENT"
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"CURSEL=$TMPDIR/nnn-preview-tui-selection.$NNN_PARENT"
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"FIFO_UEBERZUG=$TMPDIR/nnn-preview-tui-ueberzug-fifo.$NNN_PARENT"
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"FIFO_OSASCRIPT=$TMPDIR/nnn-preview-tui-osascript-fifo.$NNN_PARENT"
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"POSOFFSET=$TMPDIR/nnn-preview-tui-posoffset"
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)
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if [ -e "${TMUX%%,*}" ] && tmux -V | grep -q '[ -][3456789]\.'; then
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NNN_TERMINAL=tmux
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@ -119,6 +121,7 @@ elif [ -n "$WEZTERM_PANE" ]; then
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NNN_TERMINAL=wezterm
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elif [ -z "$NNN_TERMINAL" ] && [ "$TERM_PROGRAM" = "iTerm.app" ]; then
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NNN_TERMINAL=iterm
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mkfifo "$FIFO_OSASCRIPT" || exit 1
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elif [ -n "$WT_SESSION" ]; then
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NNN_TERMINAL=winterm
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else
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@ -131,20 +134,19 @@ elif [ "$NNN_SPLIT" != 'h' ]; then
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NNN_SPLIT='v'
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fi
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ENVVARS="$ENVVARS
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NNN_SPLIT=$NNN_SPLIT
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NNN_TERMINAL=$NNN_TERMINAL"
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IFS='
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'
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for env in $ENVVARS; do
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ENVVARS+=(
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"NNN_SPLIT=$NNN_SPLIT"
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"NNN_TERMINAL=$NNN_TERMINAL"
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)
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ENVARGS=()
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for env in "${ENVVARS[@]}"; do
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export "${env?}"
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case "$NNN_TERMINAL" in
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tmux) ENVSTRING="$ENVSTRING -e '$env'" ;;
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kitty) ENVSTRING="$ENVSTRING --env '$env'" ;;
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winterm|iterm) ENVSTRING="$ENVSTRING \\\"$env\\\"" ;;
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*) ENVSTRING="$ENVSTRING $env";;
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tmux) ENVARGS+=(-e "$env") ;;
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kitty) ENVARGS+=(--env "$env") ;;
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winterm|iterm|*) ENVARGS+=("$env") ;;
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esac
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done; unset IFS
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done
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trap '' PIPE
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exists() { type "$1" >/dev/null 2>&1 ;}
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@ -165,35 +167,35 @@ start_preview() {
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case "$NNN_TERMINAL" in
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tmux) # tmux splits are inverted
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if [ "$NNN_SPLIT" = "v" ]; then split="h"; else split="v"; fi
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eval tmux split-window "$ENVSTRING" -d"$split" -p"$NNN_SPLITSIZE" "$0" "$1" 1 ;;
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tmux split-window "${ENVARGS[@]}" -d"$split" -p"$NNN_SPLITSIZE" "$0" "$1" 1 ;;
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kitty) # Setting the layout for the new window. It will be restored after the script ends.
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kitty @ goto-layout splits
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# Trying to use kitty's integrated window management as the split window.
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eval kitty @ launch --no-response --title "preview-tui" --keep-focus \
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--cwd "$PWD" "$ENVSTRING" --location "${NNN_SPLIT}split" "$0" "$1" 1 ;;
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kitty @ launch --no-response --title "preview-tui" --keep-focus \
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--cwd "$PWD" "${ENVARGS[@]}" --location "${NNN_SPLIT}split" "$0" "$1" 1 ;;
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wezterm)
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if [ "$NNN_SPLIT" = "v" ]; then split="--horizontal"; else split="--bottom"; fi
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wezterm cli split-pane --cwd "$PWD" $split --percent "$NNN_SPLITSIZE" "$0" "$1" 1 >/dev/null
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wezterm cli activate-pane-direction Prev ;;
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iterm)
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command="$SHELL -c 'cd $PWD; env $ENVSTRING $0 $1 1'"
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echo "cd ${PWD@Q}; env ${ENVARGS[*]@Q} ${0@Q} ${1@Q} 1" > "$FIFO_OSASCRIPT" &
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if [ "$NNN_SPLIT" = "h" ]; then split="horizontally"; else split="vertically"; fi
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osascript <<-EOF
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tell application "iTerm"
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tell current session of current window
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split $split with default profile command "$command"
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split $split with default profile command "$SHELL $FIFO_OSASCRIPT"
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end tell
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end tell
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EOF
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;;
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winterm)
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if [ "$NNN_SPLIT" = "h" ]; then split="H"; else split="V"; fi
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cmd.exe /c wt -w 0 sp -$split -s"0.$NNN_SPLITSIZE" bash -c "cd $PWD \; \
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env $ENVSTRING QLPATH=$2 $0 $1 1" \; -w 0 mf previous 2>/dev/null ;;
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wt -w 0 sp -$split -s"0.$NNN_SPLITSIZE" bash -c "cd ${PWD@Q} ; \
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env ${ENVARGS[*]@Q} QLPATH=${2@Q} ${0@Q} ${1@Q} 1" \; -w 0 mf previous 2>/dev/null ;;
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*) if [ -n "$2" ]; then
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env "$ENVSTRING" QUICKLOOK=1 QLPATH="$2" "$0" "$1" 1 &
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env "${ENVARGS[@]}" QUICKLOOK=1 QLPATH="$2" "$0" "$1" 1 &
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else
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env "$ENVSTRING" "$NNN_TERMINAL" -e "$0" "$1" 1 &
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env "${ENVARGS[@]}" "$NNN_TERMINAL" -e "$0" "$1" 1 &
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fi ;;
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esac
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}
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