1.用git rev-list HEAD取得版本号列表：

在SmartGit中看到的也是这样，验证了我们的猜想：

取到两个版本号之后，用git diff命令：git diff [--options] ... [--] […​]

这里的[-options]我们填的是--name-status，指的是版本号，也就是每次版本的散列值，可以填前几位就可以了，git会自动识别。

--name-status选项，可以输出每个修改的文件的状态，添加，修改，删除还是重命名等。

输入命令git diff --help可以查看帮助文档：

--name-status

Show only names and status of changed files. See the description of the--diff-filter option on what the status letters mean.

--diff-filter=[(A|C|D|M|R|T|U|X|B)…​[*]]

Select only files that are Added (A), Copied (C), Deleted (D), Modified (M), Renamed (R), have their type (i.e. regular file, symlink, submodule, …​) changed (T), are Unmerged (U), are Unknown (X), or have had their pairing Broken (B). Any combination of the filter characters (including none) can be used. When* (All-or-none) is added to the combination, all paths are selected if there is any file that matches other criteria in the comparison; if there is no file that matches other criteria, nothing isselected.

Also, these upper-case letters can be downcased to exclude. E.g. --diff-filter=ad excludes added and deleted paths.

其中M和1.txt之间是\t，后面的是目录和文件，如果是在ubuntu下的话，比如修改了文件夹aa下的my.txt

则：

M\taa/my.txt

因为linux上的文件夹目录都是/，windows的，没有测试有需要的可以测试。

如何要输出到文件中：

//>> 后加输出文件的路径、文件名和后缀名

git diff [branchA] [branchB] >>d:/diff/exportname.diff

linux的重定向命令

覆盖 git diff [branchA] [branchB]>a.txt

追加 git diff [branchA] [branchB]>> a.txt

命令的具体参考帮助文档：git diff --help

用git show命令也可以：

git show会在下面包含每个文件的对比信息(内容)，这将会是大量字符串。

具体如果有目录下的文件不能显示区别，则两个命令的差异实践几次就会发现，可以解决问题的。