mirror of
https://github.com/junegunn/fzf.vim.git
synced 2026-09-30 07:32:23 +08:00
Junegunn Choi
96c08602ac
A preview runs as soon as an entry is highlighted, so a crafted tags file did not
even need to be selected to get a shell command out of 'vim -c "silent {excmd}"'.
The address goes to ':execute' as a string literal with its quotes doubled, since
':sandbox' as a modifier would stop at the first '|'.
An entry with no address is refused rather than previewing the last line of the
file, which is where Ex mode leaves the cursor.
86 lines
2.5 KiB
Bash
Executable File
86 lines
2.5 KiB
Bash
Executable File
#!/usr/bin/env bash
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REVERSE="\x1b[7m"
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RESET="\x1b[m"
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if [ -z "$1" ]; then
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echo "usage: $0 FILENAME:TAGFILE:EXCMD"
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exit 1
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fi
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IFS=':' read -r FILE TAGFILE EXCMD <<< "$*"
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# Complete file paths which are relative to the given tag file
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if [ "${FILE:0:1}" != "/" ]; then
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FILE="$(dirname "${TAGFILE}")/${FILE}"
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fi
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if [ ! -r "$FILE" ]; then
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echo "File not found ${FILE}"
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exit 1
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fi
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# If users aren't using vim, they are probably using neovim
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if command -v vim > /dev/null; then
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VIMNAME="vim"
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elif command -v nvim > /dev/null; then
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VIMNAME="nvim"
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else
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echo "Cannot preview tag: vim or nvim unavailable"
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exit 1
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fi
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# Ex mode starts on the last line, so an entry with no address would report the
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# end of the file as the tag. Every other path refuses such an entry
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if [ -z "${EXCMD}" ]; then
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exit 1
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fi
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# The address comes from a tags file, which can be untrusted, and a preview runs
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# as soon as an entry is highlighted. Sandboxed as a builtin tag jump is, so that
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# it cannot run a shell command or touch a file. ':sandbox' on its own only covers
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# the command up to the first '|', so hand the whole address to ':execute' as a
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# string literal, doubling the quotes in it
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EXCMD_LITERAL=${EXCMD//\'/\'\'}
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CENTER="$("${VIMNAME}" -R -i NONE -u NONE -e -m -s "${FILE}" \
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-c "set nomagic" \
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-c "silent sandbox execute '${EXCMD_LITERAL}'" \
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-c 'let l=line(".") | new | put =l | print | qa!')" || exit
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START_LINE="$(( CENTER - FZF_PREVIEW_LINES / 2 ))"
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if (( START_LINE <= 0 )); then
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START_LINE=1
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fi
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END_LINE="$(( START_LINE + FZF_PREVIEW_LINES - 1 ))"
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# Sometimes bat is installed as batcat.
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if command -v batcat > /dev/null; then
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BATNAME="batcat"
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elif command -v bat > /dev/null; then
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BATNAME="bat"
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fi
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if [ -z "$FZF_PREVIEW_COMMAND" ] && [ "${BATNAME:+x}" ]; then
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${BATNAME} --style="${BAT_STYLE:-numbers}" \
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--color=always \
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--pager=never \
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--wrap=never \
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--terminal-width="${FZF_PREVIEW_COLUMNS}" \
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--line-range="${START_LINE}:${END_LINE}" \
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--highlight-line="${CENTER}" \
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"$FILE"
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exit $?
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fi
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DEFAULT_COMMAND="highlight -O ansi -l {} || coderay {} || rougify {} || cat {}"
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CMD=${FZF_PREVIEW_COMMAND:-$DEFAULT_COMMAND}
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CMD=${CMD//{\}/$(printf %q "$FILE")}
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eval "$CMD" 2> /dev/null | awk "{ \
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if (NR >= $START_LINE && NR <= $END_LINE) { \
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if (NR == $CENTER) \
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{ gsub(/\x1b[[0-9;]*m/, \"&$REVERSE\"); printf(\"$REVERSE%s\n$RESET\", \$0); } \
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else printf(\"$RESET%s\n\", \$0); \
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} \
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}"
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