How can I reload modules from one open work environment to affect another working environment

问题

I have my PowerShell project broken into modules. But because they are modules I have to reload them every time I change them. So I wrote a loop that has a FileSystemWatcher and if one of the .psm1 file changes it will either reload or import that module.

The problem is that the above loop isn't going to let me run other scripts in its working environment, so a new environment will not have the same modules loaded/reloaded for it. I need to keep these modules out of the primary default PowerShell modules folder(s). Is there a way to run the script that reloads the modules when they change in the same environment or affect a certain environment?

UPDATE

So I run the following Module-Loader.ps1 script. The code block associated with the 'FileChanged' event does fire when I 'save' a *.psm1 file after having been modified. However two issues occure: 1) it fires twice when I save

2a) If the module is not loaded, it will run Import-Module $PWD\ModuleName, but it won't have actually loaded at least in the environment (if I run the same code in the environment it will load)

2b) if it is loaded, and it tries to remove the module, it will error that none exists.

# create a FileSystemWatcher on the currect directory
$filter = '*.psm1'
$folder = $PWD
$watcher = New-object IO.FileSystemWatcher $folder, $filter -Property @{IncludeSubdirectories = $false; EnableRaisingEvents = $true; NotifyFilter = [IO.NotifyFilters]'LastWrite'}
Register-ObjectEvent $watcher Changed -SourceIdentifier FileChanged -Action { 
$name = $Event.SourceEventArgs.Name 
$filename = $name.Remove($name.IndexOf('.'), 5)

$loadedModule = Get-Module | ? { $_.Name -eq $filename }
write-host $filename

if ($loadedModule) {
    write-host "Reloading Module $folder\$($filename)"
    Reload-Module $folder\$filename
} else {
    write-host "Importing Module $folder\$($filename)"
    Import-Module $folder\$filename
}
}

I am of the opinion that though this is being ran in a session, the code block in the event is not associated with this specific environment.

回答1:

Here is an example from some code I have that copies a folder to a shared folder any time something has changed in it. It's kinda my little dropbox implementation :-)

Any time one of the file system watcher event types such as Changed occurs, the code specified in the -Action parameter of the Register-ObjectEvent cmdlet will fire.

In your -Action code you would call Import-Module with the -Force parameter to overwrite the current one in memory.

function Backup-Folder {
    & robocopy.exe "c:\folder" "\\server\share" /MIR /W:10 /R:10
}

$watcher = New-Object System.IO.FileSystemWatcher
$watcher.Path = "c:\folder"
$watcher.IncludeSubdirectories = $true
$watcher.EnableRaisingEvents = $true

Register-ObjectEvent $watcher "Changed" -Action { Backup-Folder }
Register-ObjectEvent $watcher "Created" -Action { Backup-Folder }
Register-ObjectEvent $watcher "Deleted" -Action { Backup-Folder }
Register-ObjectEvent $watcher "Renamed" -Action { Backup-Folder }

来源：https://stackoverflow.com/questions/8617201/how-can-i-reload-modules-from-one-open-work-environment-to-affect-another-workin

标签

powershell

powershell-module