Offline NuGet Repository installation.

Readme.txt

In case you work offline, copy Install.ps1 and Uninstall.ps1 to your directory %_LOCAL_REPO_% (which is just random name for reference) with nuget packages.

Using PowerShell:

1. Close all running VS (or them after installation).
3. Run Install.ps1 script from %_LOCAL_REPO_% folder (to remove: run Uninstall.ps1).

Using VS user interface (does not require VS reloading):

1. Copy/move packages from %_LOCAL_REPO_% to some local directory of your choice. Let's call it %_LOCAL_REPO_% for further reference.
2. Run VS
3. Tools => Options => NuGet Package Manager => Package Sources:
4. In the "Available package sources:" Add "Local Repo" pointing to your %_LOCAL_REPO_% directory, and move it up in the list to be the first Repo for queries.
5. OK Options dialog [and (re-)build your solution(s) if needed].

NOTE: You can copy manually downloaded nuget packages to that %_LOCAL_REPO_% directory to use them normally.

Install.ps1

function NuGetAddLocalRepo ([string] $localRepoPath)
{
    ## NuGet Package Manager config file path
    $config = "$Env:APPDATA\NuGet\NuGet.Config"

    If ( -Not (Test-Path($config)) ) {
        Write-Host "NuGet Package Manager config not found!"
        return
    }

    ## Open an parse config XML
    $xml = [xml](Get-Content $config)

    ## Value: Current directory absolute path
    $repoDir = (get-item -path $localRepoPath)
    $repoPath = $repoDir.FullName

    $sources = $xml.configuration.packageSources

    ## Find source package for current dir
    $repoNode = $sources.add | where {$_.value -eq $repoPath}

    if ($repoNode) {
        $disabledNode = $xml.configuration.disabledPackageSources.add | 
            where {$_.key -eq $repoNode.key -and $_.value -eq "true" }
        if ($disabledNode) {
            [void] $disabledNode.ParentNode.RemoveChild($disabledNode)
            $xml.Save([string]$config)
            Write-Host "Re-Enabled '$($repoNode.key)'."
            Write-Host "Please reload Visual Studio for changes to take effect!"
            return
        }

        Write-Host "Local repo is already installed and enabled."
        return
    }

    $repoName = $repoDir.Name
    $repoNode = $sources.add | where {$_.key -eq $repoName}
    if ($repoNode) {
        $repoName = $repoDir.FullName.Replace("\", "_").Replace("/", "_")
    }
    $repoNode = $sources.add | where {$_.key -eq $repoName}
    if ($repoNode) {
        Write-Host "Repo name conflict."
        return
    }

    $repoNode = $xml.CreateElement("add")
    $repoNode.SetAttribute("key", $repoName)
    $repoNode.SetAttribute("value", $repoPath)
    [void] $sources.PrependChild($repoNode)

    $xml.Save([string]$config)
    Write-Host "Successfully added local repo!"
    Write-Host "Please reload Visual Studio for changes to take effect!"
}

Write-Host "Installing current directory as NuGet packages source..."

NuGetAddLocalRepo (get-item -path ".\")

Uninstall.ps1

function NuGetRemoveLocalRepo ([string] $localRepoPath)
{
    ## NuGet Package Manager config file path
    $config = "$Env:APPDATA\NuGet\NuGet.Config"

    If ( -Not (Test-Path($config)) ) {
        Write-Host "NuGet Package Manager config not found!"
        return
    }

    ## Open an parse config XML
    $xml = [xml](Get-Content $config)

    ## Value: Current directory absolute path
    $repoDir = (get-item -path $localRepoPath)
    $repoPath = $repoDir.FullName

    $sources = $xml.configuration.packageSources

    ## Find source package for current dir
    $repoNode = $sources.add | where {$_.value -eq $repoPath}

    if (!$repoNode) {
        Write-Host "Repo for the given path was not installed."
        return
    }

    $disabledNode = $xml.configuration.disabledPackageSources.add | 
        where {$_.key -eq $repoNode.key }
    if ($disabledNode) {
        [void] $disabledNode.ParentNode.RemoveChild($disabledNode)
    }
    [void] $repoNode.ParentNode.RemoveChild($repoNode)

    $xml.Save([string]$config)
    Write-Host "Local repo has been uninstalled successfully!"
    Write-Host "Please reload Visual Studio for changes to take effect!"
}

Write-Host "Uninstalling current directory as NuGet packages source..."

NuGetRemoveLocalRepo (get-item -path ".\")