git diff的输出未在Powershell中正确处理 [英] The output of git diff is not handled correctly in powershell

问题描述

我已经阅读了几个有关此问题的QA，但没有一个提供答案。有一种解决方法，我在此再次说明，但我想理解并解决问题。

I have read several QAs to this problem, but none provided an answer. There is a workaround, which I state here again, but I want to understand and solve the problem.

问题

在Powershell中，档案外的mypatch.patch 会产生「垃圾字元」，例如

The issue is that executing the command git diff reva revb | Out-File mypatch.patch in powershell produces "garbage characters" in place of e.g. German umlauts (├ñ instead of ä).

调查

我在德国变音符号（├ñ而不是ä）。按照某些QA中的建议执行 $ Env：LESSCHARSET = utf8 ，我的确在终端中获得了正确的输出，但是一旦将其重定向到文件 mypatch.patch 变音符（和其他字符）已变形。即使 git --no-pager diff reva revb 也会在终端中产生正确的输出。但是，一旦您想将其通过管道传输到文件，那是错误的。您看到的是不是得到的！

When I perform $Env:LESSCHARSET="utf8" as suggested in some QAs, I do get correct output in the terminal, but once it is redirected to the file mypatch.patch the umlauts (and other characters) are mangled. Even git --no-pager diff reva revb results in correct output in the terminal. But as soon as you want to pipe that to a file, it is wrong. What you see is not what you get!

在我看来， Out-File的输入已被破坏，因此设置 -Encoding 参数不会更改任何内容。我认为 Out-File 不应归咎于此。例如，命令 $ mypatch = git diff reva revb （即使在diff之前添加了--no-pager）也会导致变量例如在终端上打印该变量时，欧元符号或变音符号出现乱码（Ôé¼而不是€）。

It seems to me that the input to Out-File is already mangled and thus setting the -Encoding argument does not change anything. I don't think Out-File is to blame here. For instance, the command $mypatch = git diff reva revb (even with --no-pager added before diff) results in a variable where e.g. Euro symbol or umlauts appear mangled (Ôé¼ instead of €) when that variable is printed to the terminal.

我尝试使用powershell 5.1和开放源代码powershell core 6.0.4 Windows 10（1709）。我使用git 2.18.0.windows.1。它可以在Windows命令行（cmd）上正常工作，因此简单的解决方法是从powershell控制台调用：

I tried powershell 5.1 and the open source powershell core 6.0.4 on Windows 10 (1709). I use git 2.18.0.windows.1. It works fine with the windows commandline (cmd), thus the simple workaround is to call from the powershell console:

解决方法

cmd / c git diff reva revb> mypatch.patch

问题

这仅适用于Powershell吗？

How does this work with powershell only?

推荐答案

问题似乎是由于 [Console] :: OutputEncoding 的错误设置引起的。如果未将其设置为UTF8，请尝试将其设置为： [Console] :: OutputEncoding = [System.Text.Encoding] :: UTF8 。

The problem seems to be caused by a wrong setting of [Console]::OutputEncoding. If it is not set to UTF8, try setting it: [Console]::OutputEncoding = [System.Text.Encoding]::UTF8.

然后分别使用 $ Env：LESSCHARSET 没关系，我相信它已不再使用。

It does not matter if you then use $Env:LESSCHARSET, respectively I believe it's not used anymore.

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