将stderr重定向到标准输出

将stderr重定向到标准输出

本文介绍了Git clone:将stderr重定向到标准输出,但将错误写入标准错误的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

git clone 将其输出写入 stderr ,如。我可以用以下命令重定向它:

  git clone https:// myrepo c:\repo 2>& 1 

但是,这会将所有输出,包括错误,从 stderr 到 stdout 。有没有办法将进度消息重定向到 stdout ,但仍有写入 stderr 的错误消息。

解决方案

我使用这个脚本来运行git命令。由于git会写入stderr,即使成功(例如在同步时拉出),它会处理这些情况并写出第一行输出,这通常是您需要知道的。

 <#
.Synopsis
调用git,处理其并非错误的古怪stderr

.Outputs
Git消息,最后退出代码

。示例
Invoke-Git推送

。示例
Invoke-Gitadd。
#>
函数Invoke-Git
{
param(
[Parameter(Mandatory)]
[string] $ Command)

try {

$ exit = 0
$ path = [System.IO.Path] :: GetTempFileName()

Invoke-Expressiongit $ Command 2> $ path
$ exit = $ LASTEXITCODE
if($ exit -gt 0)
{
Write-Error(Get-Content $ path).ToString()
}
else
{
Get-Content $ path | Select-Object -First 1
}
$ exit
}
catch
{
Write-Host错误:$ _`n $($ _ .ScriptStackTrace)
}
finally
{
if(Test-Path $ path)
{
Remove-Item $ path
}
}
}


git clone writes its output to stderr as documented here. I can redirect this with the following command:

git clone https://myrepo c:\repo 2>&1

But this will redirect all output, including errors, from stderrto stdout. Is there a way to redirect progress messages to stdout but have error messages still written to stderr.

解决方案

I use this script to run git commands. Since git will write to stderr even if successful (e.g. pull when in sync), this handles those cases and writes out first line of output, which is usually what you need to know.

<#
.Synopsis
    Invoke git, handling its quirky stderr that isn't error

.Outputs
    Git messages, and lastly the exit code

.Example
    Invoke-Git push

.Example
    Invoke-Git "add ."
#>
function Invoke-Git
{
param(
[Parameter(Mandatory)]
[string] $Command )

    try {

        $exit = 0
        $path = [System.IO.Path]::GetTempFileName()

        Invoke-Expression "git $Command 2> $path"
        $exit = $LASTEXITCODE
        if ( $exit -gt 0 )
        {
            Write-Error (Get-Content $path).ToString()
        }
        else
        {
            Get-Content $path | Select-Object -First 1
        }
        $exit
    }
    catch
    {
        Write-Host "Error: $_`n$($_.ScriptStackTrace)"
    }
    finally
    {
        if ( Test-Path $path )
        {
            Remove-Item $path
        }
    }
}

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07-23 20:16