如何创建一个返回当前提示的 bash 函数?

如何创建一个返回当前提示的 bash 函数?

是否可以创建一个返回到当前行的 bash 函数?

例如

#~/.bashrc
do-magic() {
    # do some magic and return the input to current prompt line
    # for example "hello"
}
bind -x '"\C-e":do-magic'

然后

$ echo <ctrl+e>
# become
$ echo hello

答案1

从 Bash 4.0 开始您可以通过更改函数内的READLINE_LINEREADLINE_POINT变量来实现这一点。(“point”是当前光标位置。)例如:

_paste() {
    local str="Hello $(date +%F)!"
    local len=${#str}
    # Note: Bash 5.x wants the length in characters, but Bash 4.x apparently
    #       wanted bytes. To properly insert non-ASCII text, you used to need:
    # local len=$(printf '%s' "$str" | wc -c)

    # Insert the text in between [0..cursor] and [cursor..end]
    READLINE_LINE=${READLINE_LINE:0:$READLINE_POINT}${str}${READLINE_LINE:$READLINE_POINT}
    # Advance the cursor
    READLINE_POINT=$((READLINE_POINT + len))
}

bind -x '"\C-e": _paste'

答案2

您可以使用“期望”

这里有一个详细的例子: https://stackoverflow.com/a/77953253/5521600

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