PowerShell Gallery Module - Light

PowerShellGet.psm1

function Find-Module {
    <#
        .Synopsis
            A wrapper for Invoke-RestMethod to search the PowerShell Gallery
        .Description
            In order to support wildcards, we build pretty complicated URLs, 
            and then we filter the results by title
    #>
    [CmdletBinding()]
    param (
        # The module name (supports the * wildcard)
        [string]$Name
    )
    # We can support wildcards by splitting, searching for each piece, and then filtering the results
    # Build a URL using substringof
    $filter = @($Name.Trim('*').Split('*') | ForEach { "substringof('$_',Id)" }) -join " and "
    $url = "https://www.powershellgallery.com/api/v2/Packages?`$filter=$filter and IsLatestVersion"  

    # Fetch results and filter them with -like, and then shape the output
    Invoke-RestMethod $url | Where { $_.title.'#text' -like $Name } |
    Select-Object @{n='Name';ex={$_.title.'#text'}},
                  @{n='Version';ex={$_.properties.version}},
                  @{n='Url';ex={$_.Content.src}}
}

function Save-Module {
    <#
        .Synopsis
            A wrapper for Invoke-WebRequest -OutFile to save modules with the nuget package file names 
    #>
    [CmdletBinding()]
    param (
        # The Url to download from
        [Parameter(ValueFromPipelineByPropertyName=$true, Mandatory=$true)]
        $Url,

        # The name of the module (for naming the output file)
        [Parameter(ValueFromPipelineByPropertyName=$true, Mandatory=$true)]
        $Name,
        
        # The version of the module (for naming the output file)
        [Parameter(ValueFromPipelineByPropertyName=$true)]
        $Version="",
        
        # The folder to save to
        [Alias("Path")]
        [string]$Destination = $pwd
    )
    process {
        if($Destination -eq "CurrentUser") {
            $Destination = Join-Path ([Environment]::GetFolderPath("MyDocuments")) "WindowsPowerShell\Modules"
        }
        if($Destination -eq "AllUsers" -or $Destination -eq "LocalMachine") {
            $Destination = Join-Path ([Environment]::GetFolderPath("ProgramFiles")) "WindowsPowerShell\Modules"
        }
        if(-not (Test-Path $Destination)) {
            $null = mkdir $Destination -force
        }
        $Path = Join-Path $Destination "$Name.$Version.nupkg"
        Invoke-WebRequest $Url -OutFile $Path
        Get-Item $Path
    }
}


function Extract-Module {
    <#
        .Synopsis
            A wrapper for Extract-Archive to unzip modules from nuget packages 
    #>
    [CmdletBinding()]
    param (
        # The Url to download from
        [Parameter(ValueFromPipelineByPropertyName=$true, Mandatory=$true)]
        [Alias("PSPath")]
        $Path,
        
        # The folder to save to
        [string]$Destination = "AllUsers"
    )
    process {
        if($Destination -eq "CurrentUser") {
            $Destination = Join-Path ([Environment]::GetFolderPath("MyDocuments")) "WindowsPowerShell\Modules"
        }
        if($Destination -eq "AllUsers" -or $Destination -eq "LocalMachine") {
            $Destination = Join-Path ([Environment]::GetFolderPath("ProgramFiles")) "WindowsPowerShell\Modules"
        }
        if(-not (Test-Path $Destination)) {
            $null = mkdir $Destination -force
        }
    
        if([IO.Path]::GetExtension($Path) -eq ".nupkg") {
            $Path = Rename-Item $Path ([IO.Path]::ChangeExtension([IO.Path]::GetFileName($Path), ".zip")) -Passthru
        }
        $Module, $Version = $Path.BaseName -split "\.",2
        Expand-Archive $Path -Destination (Join-Path $Destination (Join-Path $Module $Version))
    }
}

Thats really nice! I added Powershell 4 support and a method to get the required modules.
https://gist.github.com/abbgrade/70a1481422c1e5e22c43f2f4df6896ce

I borrowed some of this code for a script to refresh the "community" modules in my private NuGet Repository.
Thanks for sharing!