alias gco='git checkout' alias cdp='cd ..'
还有那么多.
我的问题是每次输入别名时如何打印命令并按回车键？
例如：
$> gco master > Command: git checkout master > Git process ...
类似的东西,如果解决方案也适用于bash会更好！
谢谢！
解决方法
我从here那里得到了答案.
1.评估所有别名
_aliases="$(alias -Lr 2>/dev/null || alias)"
alias_for() {
[[ $1 =~ '[[:punct:]]' ]] && return
local found="$( echo "$_aliases" | sed -nE "/^alias ${1}='?(.+)/s//\\1/p" )"
[[ -n $found ]] && echo "${found%\'}"
}
首先,将所有别名存储在变量中.别名-r打印所有常规别名(不是全局或后缀),别名-L以“适合在启动脚本中使用的方式”打印它们.
alias_for()函数执行一些清理,删除引号并在行前放置别名.当我们回显${_ aliases}时,我们会得到这样的结果：
alias history='fc -l 1' alias ls='ls -F -G' alias lsdf='ls -1l ~/.*(@)' alias mv='mv -v'
将此与别名的输出进行比较：
history='fc -l 1' ls='ls -F -G' lsdf='ls -1l ~/.*(@)' mv='mv -v'
2.检查是否输入了别名的功能.
如果输入了别名,我们现在可以检测到它,然后将其打印出来：
expand_command_line() {
[[ $# -eq 0 ]] && return # If there's no input,return. Else...
local found_alias="$(alias_for $1)" # Check if there's an alias for the comand.
if [[ -n $found_alias ]]; then # If there was
echo ${found_alias} # Print it.
fi
}
3.每次输入命令时运行此命令
Executed just after a command has been read and is about to be executed. If the history mechanism is active (and the line was not discarded from the history buffer),the string that the user typed is passed as the first argument,otherwise it is an empty string. The actual command that will be executed (including expanded aliases) is passed in two different forms: the second argument is a single-line,size-limited version of the command (with things like function bodies elided); the third argument contains the full text that is being executed.
from the zsh Manual,chapter 9.
注意,我们可能只是使用preeexec函数来显示正在运行的内容.
要将我们的函数添加到preexec,我们使用钩子using this example：
autoload -U add-zsh-hook # Load the zsh hook module. add-zsh-hook preexec expand_command_line # Adds the hook
要稍后删除钩子,我们可以使用：
# add-zsh-hook -d preexec expand_command_line # Remove it for this hook.
我的壳
这是我运行时shell的样子：
$1
cd -
$rake
bundle exec rake
^C
$chmod
usage: chmod [-fhv] [-R [-H | -L | -P]] [-a | +a | =a [i][# [ n]]] mode|entry file ...
chmod [-fhv] [-R [-H | -L | -P]] [-E | -C | -N | -i | -I] file ...
$git lg1
fatal: Not a git repository (or any of the parent directories): .git
从我的shell示例中可以看出,当运行没有别名的命令(如chmod)时,不会显示完整命令.运行别名命令(如1或rake)时,将显示完整命令.
运行git别名(例如git lg1)时,不会展开git别名.如果你看一下我的first link,完整的例子确实使用了git别名扩展 – 你应该采用它并修改git别名对你来说至关重要.
