在git-completion。Bash有一行:

complete -o default -o nospace -F _git git

查看这一行(和_git函数)，你可以将这一行添加到你的.bash_profile:

complete -o default -o nospace -F _git_checkout gco

您只需要找到完整的命令并复制具有别名的行即可。

我有别名d-m=“码头机”。d-m是docker-machine的别名。

所以在Mac上(通过brew)，补全文件在cd ' brew——prefix ' /etc/bash_completion.d/。 对于我的案例，我编辑了名为docker-machine的文件。 在最下面是:

complete -F _docker_machine docker-machine

所以我添加了另一行，用我的别名:

complete -F _docker_machine docker-machine
complete -F _docker_machine d-m

如果你使用别名g='git'，我将这行代码添加到.bash_aliases中

complete -o default -o nospace -F _git g

我也遇到了这个问题，并提出了这个代码片段。这将自动为您提供所有别名的补全。在声明所有(或任何)别名后运行它。

# wrap_alias takes three arguments:
# $1: The name of the alias
# $2: The command used in the alias
# $3: The arguments in the alias all in one string
# Generate a wrapper completion function (completer) for an alias
# based on the command and the given arguments, if there is a
# completer for the command, and set the wrapper as the completer for
# the alias.
function wrap_alias() {
  [[ "$#" == 3 ]] || return 1

  local alias_name="$1"
  local aliased_command="$2"
  local alias_arguments="$3"
  local num_alias_arguments=$(echo "$alias_arguments" | wc -w)

  # The completion currently being used for the aliased command.
  local completion=$(complete -p $aliased_command 2> /dev/null)

  # Only a completer based on a function can be wrapped so look for -F
  # in the current completion. This check will also catch commands
  # with no completer for which $completion will be empty.
  echo $completion | grep -q -- -F || return 0

  local namespace=alias_completion::

  # Extract the name of the completion function from a string that
  # looks like: something -F function_name something
  # First strip the beginning of the string up to the function name by
  # removing "* -F " from the front.
  local completion_function=${completion##* -F }
  # Then strip " *" from the end, leaving only the function name.
  completion_function=${completion_function%% *}

  # Try to prevent an infinite loop by not wrapping a function
  # generated by this function. This can happen when the user runs
  # this twice for an alias like ls='ls --color=auto' or alias l='ls'
  # and alias ls='l foo'
  [[ "${completion_function#$namespace}" != $completion_function ]] && return 0

  local wrapper_name="${namespace}${alias_name}"

  eval "
function ${wrapper_name}() {
  let COMP_CWORD+=$num_alias_arguments
  args=( \"${alias_arguments}\" )
  COMP_WORDS=( $aliased_command \${args[@]} \${COMP_WORDS[@]:1} )
  $completion_function
  }
"

  # To create the new completion we use the old one with two
  # replacements:
  # 1) Replace the function with the wrapper.
  local new_completion=${completion/-F * /-F $wrapper_name }
  # 2) Replace the command being completed with the alias.
  new_completion="${new_completion% *} $alias_name"

  eval "$new_completion"
}

# For each defined alias, extract the necessary elements and use them
# to call wrap_alias.
eval "$(alias -p | sed -e 's/alias \([^=][^=]*\)='\''\([^ ][^ ]*\) *\(.*\)'\''/wrap_alias \1 \2 '\''\3'\'' /')"

unset wrap_alias

这个问题有很多答案，就像我自己一样，我打赌很多读者都很困惑。对于我来说，我还需要让我的dotfile在多个平台上使用不同版本的Git。我也没有使用g=git的别名，而是将g定义为一个函数。

为了做到这一点，我必须把不同的答案拼凑成一个解决方案。虽然这重复了之前的答案，但我认为在我的船上的人可能会发现这个汇编很有用，就像我第一次遇到这个问题时一样。

这假设旧的和新的Git完成，Ubuntu默认，并在MacOS上brew安装Git。在后一种情况下，bash没有处理brew安装完成(稍后我将对此进行诊断)。

# Alias g to git

g() {
  if [[ $# > 0 ]]; then
    git "$@"
  else
    git status -sb
  fi
}

# Preload git completion in Ubuntu which is normally lazy loaded but we need
# the __git_wrap__git_main function available for our completion.
if [[ -e /usr/share/bash-completion/completions/git ]]; then
  source /usr/share/bash-completion/completions/git
elif [[ -e /usr/local/etc/bash_completion.d/git-completion.bash ]]; then
  source /usr/local/etc/bash_completion.d/git-completion.bash
fi

if command_exists __git_complete; then
  __git_complete g _git
elif command_exists __git_wrap__git_main; then
  complete -o bashdefault -o default -o nospace -F __git_wrap__git_main g
fi

Felipe Contreras对Git补全功能(参见Git 2.30中的Zsh补全)非常积极，他提出(可能是Git 2.31, Q1 2021)一个公共函数将有助于别名自动补全。

他的建议:

Back in 2012 I argued for the introduction of a helper that would allow users to specify aliases like: git_complete gf git_fetch Back then there was pushback because there was no clear guideline for public functions (git_complete vs _git_complete vs _GIT_complete), and some aliases didn't actually work. Fast-forward to 2020 and there's still no guideline for public functions, and those aliases still don't work (even though I sent the fixes). This has not prevented people from using this function that is clearly needed to setup custom aliases (this page), and in fact it's the recommended way. But it is cumbersome that the user must type: __git_complete gf _git_fetch Or worse: __git_complete gk __gitk_main 8 years is more than enough time to stop waiting for the perfect to come; let's define a public function (with the same name) that is actually user-friendly: __git_complete gf git_fetch __git_complete gk gitk While also maintaining backwards compatibility. The logic is: If $2 exists, use it directly If not, check if __$2_main exists If not, check if _$2 exists If not, fail