Bash 补全：compgen 一个单词列表，就好像它们是路径一样 - 仅建议直到下一个斜杠

我正在为一个 bash 完成脚本工作点文件管理实用程序。该工具有一个命令dots diff [filename]这将显示安装的点文件和源点文件之间的差异。它还有一个命令dots files其中列出了所有托管点文件的路径（相对于源目录）。我想用 files 命令的输出来完成 diff 命令。

这是文件输出的示例

X11/xkb/symbols/evan-custom
X11/xorg.conf.d/10-dual-monitors.conf
X11/xorg.conf.d/10-keylayout.conf
bash/aliases
bash/bashrc
bash/completion.d/dots
bash/profiles/standard-user
bash/profiles/systemd-user
bspwm/bspwmrc
compton/compton.conf
fontconfig/fonts.conf
git/config
git/ignore
gtk-2.0/gtkrc
gtk-3.0/settings.ini
mysql/config
mysql/grcat
ncmpcpp/config
pulse/client.conf
pulse/daemon.conf
pulse/default.pa
ssh/config
sublime-text-3/Packages/User/Preferences.sublime-settings
sxhkd/sxhkdrc
termite/config
transmission-daemon/settings.json
vim/vimrc

使用这样的东西

COMPREPLY=( $(compgen -W "$(dots files)" -- $cur) )

有效，但是当 readline 列出可用选项时，它会列出完整路径（上面的列表）。

我希望它将这些单词视为文件路径，并且在列出建议时仅列出第一个正斜杠。

例如，如果我输入dots diff [tab][tab]应打印以下内容

X11/
bash/
bspwm/
compton/
fontconfig/
git/
gtk-2.0/
gtk-3.0/
mysql/
ncmpcpp/
pulse/
ssh/
sublime-text-3/
sxhkd/
termite/
transmission-daemon/
vim/

例如，如果我然后输入dots diff bash/[tab][tab]然后它会显示

aliases
bashrc
completion.d/
profiles/

理想情况下我希望它实际上把它当作一条路径以便更改 readline 选项mark-directories关闭将排除尾部斜杠。

我尝试过设置compopt -o filenames但这反而给出了文件名的建议，而不是最初的路径。

这是我到目前为止的完成脚本

我已经解决了这个问题。

诀窍是使用compopt -o filename然后切掉正在完成的路径的一部分，即正在完成的目录的子目录。

这是代码

# Do completion from a passed list of paths
#
# Accepts 2 arguments
# 1. The list of paths to complete from
# 2. The current word being completed
__dots_path_comp()
{
    # This forces readline to only display the last item separated by a slash
    compopt -o filenames

    local IFS=$'\n'
    local k="${#COMPREPLY[@]}"

    for path in $(compgen -W "$1" -- $2)
    do
        local trailing_trim

        # Determine what to trim from the end
        trailing_trim="${path#${2%/*}/}/"
        trailing_trim="${trailing_trim#*/}"
        trailing_trim="${trailing_trim%/}"

        # Don't add a space if there is more to complete
        [[ "$trailing_trim" != "" ]] && compopt -o nospace

        # Remove the slash if mark-directories is off
        if ! _rl_enabled mark-directories
        then
            # If The current typed path doesnt have a slash in it yet check if
            # it is the full first portion of a path and ignore everything after
            # if it is. We don't have to do this once the typed path has a slash
            # in it as the logic above will pick up on it
            [[ "$2" != */* && "$path" == ${2}/* ]] && path="$2/$trailing_trim"    

            trailing_trim="/$trailing_trim"
        fi

        COMPREPLY[k++]="${path%%${trailing_trim}}"
    done
}