如何使我的 Git 别名的制表符补全功能像现有命令一样?

How can I make tab completion for my Git alias behave like an existing command?

我正在编写一个 shell 脚本来向 git 添加一个 "review" 子命令,以便更容易地进行代码审查。它基本上是 git diffgit difftool 命令的精美包装器,但需要更少的输入。

一些用法示例:

# Lists added, deleted, renamed and modified files between master and current branch
git review master -l

# Opens difftool for files modified between master and current branch
git review -m

我想在我的 shell 脚本中启用分支自动完成功能,但我一辈子都不知道该怎么做。这就是我真正想要的:

git review ma<tab><tab>

然后它应该表现得像 git checkout ma<tab><tab>

我的 shell 脚本:

#!/bin/env bash

function print_usage {
    echo "Usage: git review <branch> <-a|-d|-m|-l> [-- paths/to filter/by]"
    echo ""
    echo "    -a: Only review added files"
    echo "    -d: Only review delete files"
    echo "    -m: Only review modified files"
    echo "    -l: List files and and type of modification"
}

if [ -z "" ] || [ -z "" ]; then
    print_usage
    exit 1
fi

git_branch=
review_command=
path_filters=""

shift
shift

if [ "" = "--" ]; then
    path_filters="$@"
fi

case $review_command in
    "-a")
        echo "Reviewing added files..."

        if [ -z "$path_filters" ]; then
            git difftool $git_branch -- $(git diff --name-status $git_branch | grep -E '^A' | awk '{print }')
        else
            git difftool $git_branch -- $(git diff --name-status $git_branch -- $path_filters | grep -E '^A' | awk '{print }')
        fi
        ;;
    "-d")
        echo "Reviewing deleted files..."

        if [ -z "$path_filters" ]; then
            git difftool $git_branch -- $(git diff --name-status $git_branch | grep -E '^D' | awk '{print }')
        else
            git difftool $git_branch -- $(git diff --name-status $git_branch -- $path_filters | grep -E '^D' | awk '{print }')
        fi
        ;;
    "-m")
        echo "Reviewing modified files..."

        if [ -z "$path_filters" ]; then
            git difftool $git_branch -- $(git diff --name-status $git_branch | grep -E '^M' | awk '{print }')
        else
            git difftool $git_branch -- $(git diff --name-status $git_branch -- $path_filters | grep -E '^M' | awk '{print }')
        fi
        ;;
    "-l")
        echo "Differences between $git_branch and $(git mybranch)..."

        if [ -z "$path_filters" ]; then
            git diff --name-status $git_branch
        else
            git diff --name-status $git_branch -- $path_filters
        fi
        ;;
esac

echo ""
echo "Review finished."

真的,因为我正在输入命令,我怀疑我的 shell 脚本是否与解决方案有任何关系。

其他一些有用的信息:

有没有办法将 git 分支自动完成添加到自定义 git 扩展命令?


Linux 的一个有趣的相关问题:

使用别名

让我们假设您的脚本的最小版本,例如

#!/usr/bin/env bash

git diff "$@"

这是可执行文件,位于您的 $PATH 中。我们称它为 gitreview.

要为它取一个别名,你可以像这样在你的.gitconfig中添加它:

[alias]
    review = "!f() { gitreview \"$@\"; }; f"

当您输入 git 时,这会让您完成 review。现在,要使其行为与 git checkout 相同,您可以使用空命令,如下所示:

review = "!f() { : git checkout ; gitreview \"$@\"; }; f"

它会像 git checkout 一样完成!请注意 checkout; 之间的空格是必需的。


这是git-completion.bashin the comments提到的:

# If you use complex aliases of form '!f() { ... }; f', you can use the null
# command ':' as the first command in the function body to declare the desired
# completion style.  For example '!f() { : git commit ; ... }; f' will
# tell the completion to use commit completion.  This also works with aliases
# of form "!sh -c '...'".  For example, "!sh -c ': git commit ; ... '".

使用外部命令

或者,您可以将脚本命名为 git-review 并将其保留在 $PATH 中的某处,从而使脚本成为适当的外部命令。要完成它(假设你有 Bash 和 Git 完成),将它添加到你的 ~/.bash_completion 文件(如果它不存在就创建它):

_git_review() { _git_checkout; }

Git 完成(对于 Git 2.18 或更新版本)检查名为 _git_$command 的完成函数,通过这样做,你说“只需调用 _git_checkout相反。