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如何在不启动新的Powershell会话的情况下强制重新加载模块函数定义?

powershell-module module powershell

mark · 技术社区 · 6 年前

我有一个模块,我叫它 xyz.ps.core . 导出一个函数- Get-PullRequestsFromCommitIds

我修复了函数中的一个错误,重新发布了该模块,重新安装并重新导入了它,但该函数仍然引用了该模块的旧版本。

C:\xyz\tip [master â¡]> Get-Command Get-PullRequestsFromCommitIds | ft -AutoSize

CommandType Name                          Version     Source
----------- ----                          -------     ------
Function    Get-PullRequestsFromCommitIds 1.0.19107.4 xyz.ps.core

如您所见,函数来自版本 1.0.19107.4

C:\xyz\tip [master â¡]> get-module xyz.ps.core | ft -AutoSize

ModuleType Version     Name             ExportedCommands
---------- -------     ----             ----------------
Manifest   1.0.19107.7 xyz.ps.core {Assert-ExtractionDestFolder, Assert-PullRequestMatchesFolder, Backup-Database, Connect-OctopusToTfs...}


C:\xyz\tip [master â¡]> get-module xyz.ps.core -ListAvailable | ft -AutoSize


    Directory: C:\Users\mkharitonov\Documents\WindowsPowerShell\Modules


ModuleType Version     Name             ExportedCommands
---------- -------     ----             ----------------
Manifest   1.0.19107.7 xyz.PS.Core {Assert-ExtractionDestFolder, Assert-PullRequestMatchesFolder, Backup-Database, Connect-OctopusToTfs...}

1.0.19107.7 . 但是好吧,我有一个功能可以刷新模块,即使它已经安装到相同的版本:

C:\xyz\tip [master â¡]> (get-command Use-Module).ScriptBlock
param([Parameter(Mandatory)]$Name)

    if ($VerbosePreference -ne 'Continue')
    {
        Write-Host -ForegroundColor Cyan -NoNewline "Using the latest version of $Name ... "
    }

    Write-Verbose "Uninstalling all the versions of $Name ..."
    Uninstall-Module $Name -AllVersions -Force -ErrorAction SilentlyContinue
    Remove-Module $Name -Force -ErrorAction SilentlyContinue

    Write-Verbose "Installing the latest version of $Name ..."
    Install-Module $Name -Scope CurrentUser -Force

    Write-Verbose "Importing $Name into the current session ..."
    Import-Module $Name -Force

    if ($VerbosePreference -ne 'Continue')
    {
        Write-Host -ForegroundColor Cyan (Get-Module $Name).Version
    }

现在让我们使用它:

C:\xyz\tip [master â¡]> use-module xyz.ps.core
Using the latest version of xyz.ps.core ... 1.0.19107.7

C: \xyz\tip[master]>Get命令Get PullRequestsFromCommitIds | ft-AutoSize

CommandType名称版本源
函数Get PullRequestsFromCommitIds 1.0.19107.4xyz.ps.核心

还是那个旧的。请注意,在一个新的Powershell窗口中,该函数取自当前版本的模块。

0 回复 | 直到 6 年前

HAL9256 6 年前

行为就是一切 about scopes . TLDR:

会话、模块和嵌套提示是自包含的环境,

基本上,由于模块是自包含的环境,而不是子范围,所以它们不能将模块导入“父”脚本范围。即使你用 -Force

sampleModule.psm1

Function Test-Import { 
param([Parameter(Mandatory)]$Name)
    Write-Host "List Loaded modules before"
    Get-Module

    Write-Host "Importing $Name into the current session ..."
    Import-Module $Name -Force

    Write-Host "Module Version $((Get-Module $Name).Version)"

    Write-Host "Loaded Modules After"
    #List Loaded modules after
    Get-Module
}

#Only present desired functions
Export-ModuleMember -Function Test-Import

如果我们从一个简单的空白测试开始(为了简洁起见,我删除了无关的模块):

PS C:> #Clean state - Nothing Loaded for demonstration
PS C:> Get-Module

ModuleType Version    Name                                ExportedCommands
---------- -------    ----                                ----------------

PS C:> Import-Module .\sampleModule.psm1
PS C:> Get-Module

ModuleType Version    Name                                ExportedCommands
---------- -------    ----                                ----------------
Script     0.0        Test-Module                         {Test-Import}

PS C:> Test-Import ActiveDirectory
List Loaded modules before

ModuleType Version    Name                                ExportedCommands
---------- -------    ----                                ----------------
Script     0.0        Test-Module                         {Test-Import}

Importing ActiveDirectory into the current session ...
Module Version 1.0.1.0

Loaded Modules After

ModuleType Version    Name                                ExportedCommands
---------- -------    ----                                ----------------
Manifest   1.0.1.0    ActiveDirectory                     {Add-ADCentralAccessPolicyMember, Add-ADComputerServiceAccount, Add-ADDomainControllerPasswordReplicationPolicy, Add-ADFineGrainedPasswordPolicySubject...}
Script     0.0        Test-Module                         {Test-Import}

这里我们注意到ActiveDirectory模块并没有出现在函数的开头,而是在函数的末尾被加载,并且报告了正确的版本。现在让我们看看它是否加载:

PS C:> Get-Module

ModuleType Version    Name                                ExportedCommands
---------- -------    ----                                ----------------
Script     0.0        Test-Module                         {Test-Import}

正如我们所看到的,由于模块在自己的自包含环境中运行,所以我们成功地将模块(本例中的ActiveDirectory)导入到模块作用域中,但没有像您预期的那样导入本地范围。

解决这个范围问题的唯一方法是将模块导入全局范围 -Global 比如:

Import-Module $Name -Force -Global

在示例脚本中更改这一行,然后重新导入:

PS C:> Import-Module .\sampleModule.psm1 -Force

PS C:> Get-Module

ModuleType Version    Name                                ExportedCommands
---------- -------    ----                                ----------------
Script     0.0        Test-Module                         {Test-Import}

PS C:> Test-Import ActiveDirectory
List Loaded modules before

ModuleType Version    Name                                ExportedCommands
---------- -------    ----                                ----------------
Script     0.0        Test-Module                         {Test-Import}

Importing ActiveDirectory into the current session ...
Module Version 1.0.1.0

Loaded Modules After

ModuleType Version    Name                                ExportedCommands
---------- -------    ----                                ----------------
Manifest   1.0.1.0    ActiveDirectory                     {Add-ADCentralAccessPolicyMember, Add-ADComputerServiceAccount, Add-ADDomainControllerPasswordReplicationPolicy, Add-ADFineGrainedPasswordPolicySubject...}
Script     0.0        Test-Module                         {Test-Import}

和以前一样。。。现在让我们检查它是否正确加载:

PS C:> Get-Module

ModuleType Version    Name                                ExportedCommands
---------- -------    ----                                ----------------
Manifest   1.0.1.0    ActiveDirectory                     {Add-ADCentralAccessPolicyMember, Add-ADComputerServiceAccount, Add-ADDomainControllerPasswordReplicationPolicy, Add-ADFineGrainedPasswordPolicySubject...}
Script     0.0        Test-Module                         {Test-Import}