Function from imported script doesn't execute

Question

i write a script with a function.

here is the script with the function:

function GenerateHashesForProjects(){
    [array]$result=@()
    Write-Output "Genrate Hash Values"
    $dependencyFolder = Join-Path -Path $PSScriptRoot -ChildPath "..\..\Sources\_Dependencies"
    #get all folder in a list below the dependency folder expect the "Modules" folder
    $dependencyContent = Get-ChildItem -Path $dependencyFolder | where {$_.PSIsContainer -and ($_.Name -notlike  "*Modules*")}

    #Fill the result array with the project file name and the depending hash value of this file
    foreach ($item in $dependencyContent) {
        $denpencyProjects = Get-ChildItem -Path $item.Fullname | where { ($_ -like "*.csproj") }
        $hashValue = (Get-FileHash $denpencyProjects.FullName -Algorithm MD5).Hash
        $name = $denpencyProjects.Name
        Write-Output "name: $name `nvalue: $hashValue"
        $result += @($denpencyProjects.Name, $hashValue)
    }
    return $result
}

That script works fine.

Now i want to use this function also in another script. So i import the script and define a variable with that function. Here is the issue if a call the function without the variable it works fine but with the variable definition not, why?

Here is the second script with the import:

. Join-Path -Path $PSScriptroot -ChildPath "..\..\Build\Tools\GenerateHashesForProjects.ps1"
[array]$dependencyFileValues = GenerateHashesForProjects

This test works fine:

. Join-Path -Path $PSScriptroot -ChildPath "..\..\Build\Tools\GenerateHashesForProjects.ps1"
GenerateHashesForProjects

user_3080908 · Answer

since you didn't post any responses to questions [grin], here is one way to rewrite your code.

what it does ...

creates an advanced function
uses the recommended name format for such
does not supply the "otta be there" Comment Based Help [grin]
defines the parameters
only the $Path is required.
defines but does not use a begin {} block
defines a process {} block
grabs a list of the dirs that branch from the source path
filters out the dirs that are in the $ExcludeDirList
gets the files in those dirs that match the $FileFilter
iterates thru that list
builds a [PSCustomObject] for each file with the desired details
you can add or remove them as needed.
sends that PSCO out to the calling code

the line that calls the function stores the entire set of results into the $Result variable and then shows that on screen.

a few notes ...

i had to change a lot of your details since i have no csproj files
there are no "what is happening" lines
if you need that, you can easily add such. i would NOT use Write-Output, tho, since that will pollute your output data.
there is no error detection OR error handling

here's the code ...

function Get-ProjectFileHash
    {
    <#
    CommentBasedHelp goes here
    #>
    [CmdletBinding ()]
    Param 
                                                                                                                                        (
    [Parameter (
        Mandatory,
        Position = 0
        )]
        [string]
        $Path,

    [Parameter (
        Position = 1
        )]
        [ValidateSet (
            'MD5',
            'MACTripleDES',
            'RIPEMD160',
            'SHA1',
            'SHA256',
            'SHA384',
            'SHA512'
            )]
        [string]
        $Algorithm = 'MD5',
        
    [Parameter (
        Position = 2
        )]
        [string[]]
        $ExcludeDirList,

    [Parameter (
        Position = 3
        )]
        [string]
        $FileFilter
    )

    begin {}

    process
        {
        $ProjDirList = Get-ChildItem -LiteralPath $Path -Directory |
            Where-Object {
                # the "-Exclude" parameter of G-CI is wildly unreliable
                #    this avoids that problem [*grin*] 
                # build a regex OR listing to exclude
                $_.Name -notmatch ($ExcludeDirList -join '|')
                }

        $FileList = Get-ChildItem -LiteralPath $ProjDirList.FullName -File -Filter $FileFilter

        foreach ($FL_Item in $FileList)
            {
            [PSCustomObject]@{
                FileName = $FL_Item.Name
                DirName = $FL_Item.Directory
                Algorithm = $Algorithm
                Hash = (Get-FileHash -LiteralPath $FL_Item.FullName -Algorithm $Algorithm).Hash
                }
            }

        }

    end {}

    } # end >>> function Get-ProjectFileHash

$Source = 'C:\ProgramData\chocolatey\lib'
$NotWanted = 'choco', '7zip', 'kb', 'bad', 'bkp'
$Filter = '*.nupkg'

$Result = Get-ProjectFileHash -Path $Source -Algorithm MD5 -ExcludeDirList $NotWanted -FileFilter $Wanted

$Result

truncated output ...

FileName                  DirName                                           Algorithm Hash                            
--------                  -------                                           --------- ----                            
autohotkey.nupkg          C:\ProgramData\chocolatey\lib\autohotkey          MD5       35A1B894AEA7D3473F3BBCBF5788D2D6
autohotkey.install.nupkg  C:\ProgramData\chocolatey\lib\autohotkey.install  MD5       EFE8AD812CBF647CFA116513AAD4CC15
autohotkey.portable.nupkg C:\ProgramData\chocolatey\lib\autohotkey.portable MD5       D31FA1B5496AAE266E4B0545835E9B19

[*...snip...*] 

vcredist2015.nupkg        C:\ProgramData\chocolatey\lib\vcredist2015        MD5       56321731BC0AEFCA3EE5E547A7A25D5E
vlc.nupkg                 C:\ProgramData\chocolatey\lib\vlc                 MD5       8177E24675461BDFF33639BF1D89784B
wiztree.nupkg

Function from imported script doesn't execute

1 Answers