在bash別名或函數中使用歷史擴展

Question

我想做一件簡單的事情讓我的隊友生活更輕松。 他們不斷地將報價復制到命令行中，這些命令行的格式化會破壞命令，即：“test”與“test”

事實證明，令人驚訝的是：

function damn() { !!:gs/“/" }

要么：

alias damn='!!:gs/“/"'

似乎都沒有工作，並一直給我錯誤

-bash: !!:gs/“/" : No such file or directory

要不就：

>

我必須在這里遺漏一些明顯的東西。

Answer 1

! 在函數或別名中不起作用。 根據bash手冊：

在讀取完整行之后 ，在shell將其分解為單詞之前立即執行歷史記錄擴展。

您可以使用builtin fc命令：

[STEP 100] # echo $BASH_VERSION
4.4.19(1)-release
[STEP 101] # alias damn='fc -s “=\" ”=\" '
[STEP 102] # echo “test”
“test”
[STEP 103] # damn
echo "test"
test
[STEP 104] #

---

為了快速引用，以下是help fc輸出。

fc: fc [-e ename] [-lnr] [first] [last] or fc -s [OLD=NEW] [command]
    Display or execute commands from the history list.

    fc is used to list or edit and re-execute commands from the history list.
    FIRST and LAST can be numbers specifying the range, or FIRST can be a
    string, which means the most recent command beginning with that
    string.

    Options:
      -e ENAME  select which editor to use.  Default is FCEDIT, then EDITOR,
                then vi
      -l        list lines instead of editing
      -n        omit line numbers when listing
      -r        reverse the order of the lines (newest listed first)

|   With the `fc -s [OLD=NEW ...] [command]' format, COMMAND is
|   re-executed after the substitution OLD=NEW is performed.

    A useful alias to use with this is r='fc -s', so that typing `r cc'
    runs the last command beginning with `cc' and typing `r' re-executes
    the last command.

    Exit Status:
    Returns success or status of executed command; non-zero if an error occurs.

Answer 2

這是一個稍微更通用的解決方案，使用bash函數來包裝fc調用，如果你想對字符串做一些超出替換的事情。

function damn() {
    # Capture the previous command.
    cmd=$(fc -ln -1)

    # Do whatever you want with cmd here
    cmd=$(echo $cmd | sed 's/[“”]/"/g')

    # Re-run the command
    eval $cmd
}