我已经设置了一堆 bash 完成脚本（大部分使用 bash-it 和一些手动设置）。
我还为常见任务设置了一堆别名，例如gco。git checkout现在我可以输入git checkout dTab并且develop为我完成了，但是当我输入时gco dTab它并没有完成。
我认为这是因为完成脚本正在完成git但未能看到gco。
有没有办法以通用/编程方式使我的所有完成脚本与我的别名一起使用？使用别名时无法完成有点违背了别名的目的。
答案1
以下代码改编自这个 Stack Overflow 上的答案和这个Ubuntu 论坛讨论主题将为您定义的所有别名添加补全：
# Automatically add completion for all aliases to commands having completion functions
function alias_completion {
local namespace="alias_completion"
# parse function based completion definitions, where capture group 2 => function and 3 => trigger
local compl_regex='complete( +[^ ]+)* -F ([^ ]+) ("[^"]+"|[^ ]+)'
# parse alias definitions, where capture group 1 => trigger, 2 => command, 3 => command arguments
local alias_regex="alias ([^=]+)='(\"[^\"]+\"|[^ ]+)(( +[^ ]+)*)'"
# create array of function completion triggers, keeping multi-word triggers together
eval "local completions=($(complete -p | sed -Ene "/$compl_regex/s//'\3'/p"))"
(( ${#completions[@]} == 0 )) && return 0
# create temporary file for wrapper functions and completions
rm -f "/tmp/${namespace}-*.tmp" # preliminary cleanup
local tmp_file; tmp_file="$(mktemp "/tmp/${namespace}-${RANDOM}XXX.tmp")" || return 1
local completion_loader; completion_loader="$(complete -p -D 2>/dev/null | sed -Ene 's/.* -F ([^ ]*).*/\1/p')"
# read in "<alias> '<aliased command>' '<command args>'" lines from defined aliases
local line; while read line; do
eval "local alias_tokens; alias_tokens=($line)" 2>/dev/null || continue # some alias arg patterns cause an eval parse error
local alias_name="${alias_tokens[0]}" alias_cmd="${alias_tokens[1]}" alias_args="${alias_tokens[2]# }"
# skip aliases to pipes, boolean control structures and other command lists
# (leveraging that eval errs out if $alias_args contains unquoted shell metacharacters)
eval "local alias_arg_words; alias_arg_words=($alias_args)" 2>/dev/null || continue
# avoid expanding wildcards
read -a alias_arg_words <<< "$alias_args"
# skip alias if there is no completion function triggered by the aliased command
if [[ ! " ${completions[*]} " =~ " $alias_cmd " ]]; then
if [[ -n "$completion_loader" ]]; then
# force loading of completions for the aliased command
eval "$completion_loader $alias_cmd"
# 124 means completion loader was successful
[[ $? -eq 124 ]] || continue
completions+=($alias_cmd)
else
continue
fi
fi
local new_completion="$(complete -p "$alias_cmd")"
# create a wrapper inserting the alias arguments if any
if [[ -n $alias_args ]]; then
local compl_func="${new_completion/#* -F /}"; compl_func="${compl_func%% *}"
# avoid recursive call loops by ignoring our own functions
if [[ "${compl_func#_$namespace::}" == $compl_func ]]; then
local compl_wrapper="_${namespace}::${alias_name}"
echo "function $compl_wrapper {
(( COMP_CWORD += ${#alias_arg_words[@]} ))
COMP_WORDS=($alias_cmd $alias_args \${COMP_WORDS[@]:1})
(( COMP_POINT -= \${#COMP_LINE} ))
COMP_LINE=\${COMP_LINE/$alias_name/$alias_cmd $alias_args}
(( COMP_POINT += \${#COMP_LINE} ))
$compl_func
}" >> "$tmp_file"
new_completion="${new_completion/ -F $compl_func / -F $compl_wrapper }"
fi
fi
# replace completion trigger by alias
new_completion="${new_completion% *} $alias_name"
echo "$new_completion" >> "$tmp_file"
done < <(alias -p | sed -Ene "s/$alias_regex/\1 '\2' '\3'/p")
source "$tmp_file" && rm -f "$tmp_file"
}; alias_completion
对于简单（仅命令，无参数）别名，它会将原始完成函数分配给别名；对于带有参数的别名，它会创建一个包装函数，将额外的参数插入到原始完成函数中。
与它所进化而来的脚本不同，该函数尊重别名命令及其参数的引号（但前者必须与完成命令匹配，并且不能嵌套），并且它应该可靠地过滤掉别名命令列表和管道（这些被跳过了，因为如果不重新创建完整的 shell 命令行解析逻辑就不可能找出其中要完成的内容）。
用法
可以将代码保存为 Shell 脚本文件，然后来源或者将函数全部复制到.bashrc（或者你的相关点文件）。重要的是调用函数在设置完 bash 补全和别名定义后（上面的代码在函数定义之后立即调用该函数，本着“源和遗忘”的精神，但如果更适合您，您可以将调用移动到下游的任何位置）。如果您不希望该函数在退出后留在您的环境中，您可以unset -f alias_completion在调用它之后添加。
笔记
如果您使用的是bash4.1 或更高版本并使用动态加载的完成，则脚本将尝试加载所有别名命令的完成，以便它可以为您的别名构建包装器函数。
答案2
有没有办法以通用/编程的方式使我的所有完成脚本与我的别名一起使用？
是的，这是完整别名项目恰好解决了您的问题。它提供了通用且编程式的别名完成功能，无需使用eval。
答案3
对于那些寻求这种方式的人来说，这是手动的方式。
首先，查找原始的补全命令。例如：
$ complete | grep git
complete -o bashdefault -o default -o nospace -F __git_wrap__git_main git
现在将这些添加到您的启动脚本（例如〜/ .bashrc）：
# load dynamically loaded completion functions (may not be required)
_completion_loader git
# copy the original statement, but replace the last command (git) with your alias (g)
complete -o bashdefault -o default -o nospace -F __git_wrap__git_main g
答案4
kopischke 先前给出的答案在 Debian 10 上运行良好仅有的如果你删除alias_completion最后
以下是需要粘贴的正确代码片段~/.bashrc：
# Automatically add completion for all aliases to commands having completion functions
function alias_completion {
local namespace="alias_completion"
# parse function based completion definitions, where capture group 2 => function and 3 => trigger
local compl_regex='complete( +[^ ]+)* -F ([^ ]+) ("[^"]+"|[^ ]+)'
# parse alias definitions, where capture group 1 => trigger, 2 => command, 3 => command arguments
local alias_regex="alias ([^=]+)='(\"[^\"]+\"|[^ ]+)(( +[^ ]+)*)'"
# create array of function completion triggers, keeping multi-word triggers together
eval "local completions=($(complete -p | sed -Ene "/$compl_regex/s//'\3'/p"))"
(( ${#completions[@]} == 0 )) && return 0
# create temporary file for wrapper functions and completions
rm -f "/tmp/${namespace}-*.tmp" # preliminary cleanup
local tmp_file; tmp_file="$(mktemp "/tmp/${namespace}-${RANDOM}XXX.tmp")" || return 1
local completion_loader; completion_loader="$(complete -p -D 2>/dev/null | sed -Ene 's/.* -F ([^ ]*).*/\1/p')"
# read in "<alias> '<aliased command>' '<command args>'" lines from defined aliases
local line; while read line; do
eval "local alias_tokens; alias_tokens=($line)" 2>/dev/null || continue # some alias arg patterns cause an eval parse error
local alias_name="${alias_tokens[0]}" alias_cmd="${alias_tokens[1]}" alias_args="${alias_tokens[2]# }"
# skip aliases to pipes, boolean control structures and other command lists
# (leveraging that eval errs out if $alias_args contains unquoted shell metacharacters)
eval "local alias_arg_words; alias_arg_words=($alias_args)" 2>/dev/null || continue
# avoid expanding wildcards
read -a alias_arg_words <<< "$alias_args"
# skip alias if there is no completion function triggered by the aliased command
if [[ ! " ${completions[*]} " =~ " $alias_cmd " ]]; then
if [[ -n "$completion_loader" ]]; then
# force loading of completions for the aliased command
eval "$completion_loader $alias_cmd"
# 124 means completion loader was successful
[[ $? -eq 124 ]] || continue
completions+=($alias_cmd)
else
continue
fi
fi
local new_completion="$(complete -p "$alias_cmd")"
# create a wrapper inserting the alias arguments if any
if [[ -n $alias_args ]]; then
local compl_func="${new_completion/#* -F /}"; compl_func="${compl_func%% *}"
# avoid recursive call loops by ignoring our own functions
if [[ "${compl_func#_$namespace::}" == $compl_func ]]; then
local compl_wrapper="_${namespace}::${alias_name}"
echo "function $compl_wrapper {
(( COMP_CWORD += ${#alias_arg_words[@]} ))
COMP_WORDS=($alias_cmd $alias_args \${COMP_WORDS[@]:1})
(( COMP_POINT -= \${#COMP_LINE} ))
COMP_LINE=\${COMP_LINE/$alias_name/$alias_cmd $alias_args}
(( COMP_POINT += \${#COMP_LINE} ))
$compl_func
}" >> "$tmp_file"
new_completion="${new_completion/ -F $compl_func / -F $compl_wrapper }"
fi
fi
# replace completion trigger by alias
new_completion="${new_completion% *} $alias_name"
echo "$new_completion" >> "$tmp_file"
done < <(alias -p | sed -Ene "s/$alias_regex/\1 '\2' '\3'/p")
source "$tmp_file" && rm -f "$tmp_file"
};