Importing a Powershell Module as LocalSystem Account on TeamCity - powershell

Question

I've got some strange behavior between me running a command under my profile, and TeamCity running the same command.
> Import-Module $root\packages\fsm.buildrelease.*\tools\modules\BuildDeployModules -Force
If I run the script manually, the build kicks off as expected. If I let TeamCity execute the script, it pukes with the following.
Import-Module : The specified module 'C:\BuildAgent\work\81eb7c2fdfcfc0af\packages\fsm.buildrelease.*\tools\modules\BuildDeployModules' was not loaded because no valid module file was found in any module directory.
I have double and triple verified that the module exists in that location. And I've gone through my modules and added [cmdletbinding()] before the param, but it doesn't seem to solve this issue.
It's frustrating because it doesn't say "which" module is getting an invalid parameter passed in.
$fsmbrVersion = "1.1.1" # contains the current version of fsm.buildrelease
Write-Host "`nfsm.buildrelease version $fsmbrVersion `nCopyright ($([char]0x00A9)) Future State Mobile Inc. & Contributors`n"
Push-Location $psScriptRoot
. .\Add-HostsFileEntry.ps1
. .\Add-IISHttpVerb.ps1
. .\Add-IISMimeType.ps1
. .\Add-LoopbackFix.ps1
. .\ApplicationAdministration.ps1
. .\AppPoolAdministration.ps1
. .\Approve-Permissions.ps1
. .\Assert-PSVersion.ps1
. .\EntityFramework.ps1
. .\Expand-NugetPackage.ps1
. .\Expand-ZipFile.ps1
. .\Format-TaskNameToHost.ps1
. .\Get-EnvironmentSettings.ps1
. .\Grunt.ps1
. .\Helpers.ps1
. .\Install-WebApplication.ps1
. .\Invoke-Deployment.ps1
. .\Invoke-DeployOctopusNugetPackage.ps1
. .\Invoke-ElevatedCommand.ps1
. .\Invoke-ExternalCommand.ps1
. .\Invoke-Using.ps1
. .\MSBuild.ps1
. .\Nuget.ps1
. .\nUnit.ps1
. .\Set-IISAuthentication.ps1
. .\Set-IISCustomHeader.ps1
. .\SiteAdministration.ps1
. .\Specflow.ps1
. .\SqlHelpers.ps1
. .\Test-PathExtended.ps1
. .\Test-RunAsAdmin.ps1
. .\TextUtils.ps1
. .\Update-AssemblyVersions.ps1
. .\Update-JsonConfigFile.ps1
. .\Update-XmlConfigFile.ps1
. .\WindowsFeatures.ps1
. .\xUnit.ps1
Pop-Location
Export-ModuleMember `
-Alias #(
'*') `
-Function #(
'Add-HostsFileEntry',
'Add-IISHttpVerb',
'Add-IISMimeType',
'Add-LoopbackFix',
'Approve-Permissions',
'Assert-That',
'Assert-PSVersion',
'Confirm-ApplicationExists',
'Confirm-AppPoolExists',
'Confirm-SiteExists',
'Exec',
'Expand-NugetPackage',
'Expand-ZipFile',
'Format-TaskNameToHost',
'Get-Application',
'Get-Applications',
'Get-AppPool',
'Get-AppPools',
'Get-DatabaseConnection',
'Get-EnvironmentSettings',
'Get-Site',
'Get-Sites',
'Get-TestFileName',
'Get-WarningsFromMSBuildLog',
'Get-WindowsFeatures',
'Install-WebApplication',
'Install-WindowsFeatures',
'Invoke-BulkCopy',
'Invoke-DBMigration',
'Invoke-Deployment',
'Invoke-DeployOctopusNugetPackage',
'Invoke-ElevatedCommand',
'Invoke-EntityFrameworkMigrations',
'Invoke-ExternalCommand',
'Invoke-FromBase64',
'Invoke-GruntMinification',
'Invoke-HtmlDecode',
'Invoke-HtmlEncode',
'Invoke-KarmaTests',
'Invoke-MSBuild',
'Invoke-Nunit',
'Invoke-NUnitWithCoverage'
'Invoke-SpecFlow',
'Invoke-SqlFile',
'Invoke-SqlStatement',
'Invoke-ToBase64',
'Invoke-UrlDecode',
'Invoke-UrlEncode',
'Invoke-Using',
'Invoke-XUnit',
'Invoke-XUnitWithCoverage',
'New-Application',
'New-AppPool',
'New-NugetPackage',
'New-Site',
'Remove-Application',
'Remove-AppPool',
'Remove-Site',
'RequiredFeatures',
'Set-IISAuthentication',
'Set-IISCustomHeader',
'Start-Application',
'Start-AppPool',
'Start-Site',
'Step',
'Stop-Application',
'Stop-AppPool',
'Stop-Site',
'Test-PathExtended',
'Test-RunAsAdmin',
'Update-Application',
'Update-AppPool',
'Update-AssemblyVersions',
'Update-JsonConfigValues',
'Update-Site',
'Update-XmlConfigValues'
)
# Messages
DATA msgs {
convertfrom-stringdata #"
error_duplicate_step_name = Step {0} has already been defined.
error_must_supply_a_feature = You must supply at least one Windows Feature.
error_feature_set_invalid = The argument `"{0}`" does not belong to the set `"{1}`".
error_admin_required = You are required to 'Run as Administrator' when running this deployment.
error_loading_sql_file = Error loading '{0}'. {1}.
error_octopus_deploy_failed = Failed to deploy: {0}.
error_specflow_failed = Publishing specflow results for '{0}' failed.
error_coverage_failed = Running code coverage for '{0}' failed.
error_tests_failed = Running tests '{0}' failed.
error_msbuild_compile = Error compiling '{0}'.
wrn_full_permission = You have applied FULL permission to '{0}' for '{1}'. THIS IS DANGEROUS!
wrn_cant_find = Could not find {0} with the name: {0}.
msg_grant_permission = Granting {0} permissions to {1} for {2}.
msg_enabling_windows_feature = Enabling Windows Feature: `"{0}`".
msg_wasnt_found = `"{0}`" wasn't found.
msg_updated_to = Updated `"{0}`" to `"{1}`".
msg_updating_to = Updating `"{0}`" to `"{1}`".
msg_changing_to = Changing `"{0}`" to `"{1}`".
msg_overriding_to = Overriding node `"{0}`" with value `"{1}`".
msg_updating_assembly = Updating AssemblyVersion to '{0}'. Updating AssemblyFileVersion to '{1}'. Updating AssemblyInformationalVersion to '{2}'.
msg_not_updating = Not updating {0}, you must specify the '-updateIfFound' if you wish to update the {0} settings.
msg_custom_header = Setting custom header '{0}' on site '{1}' to value '{2}'.
msg_disable_anon_auth = Disabling Anonymous Authentication for '{0}'.
msg_web_app_success = Successfully deploy Web Application '{0}'.
msg_copying_content = Copying {0} content to {1}.
msg_use_machine_environment = Using config for machine {0} instead of the {1} environment.
msg_octopus_overrides = Checking for Octopus Overrides for environment '{0}'.
msg_teamcity_importdata = ##teamcity[importData type='{0}' tool='{1}' path='{2}']
msg_teamcity_buildstatus = ##teamcity[buildStatus text='{0}']
msg_teamcity_buildstatisticvalue = ##teamcity[buildStatisticValue key='{0}' value='{1}']
msg_add_loopback_fix = Adding loopback fix for '{0}'.
msg_add_mime_type = Adding mime type '{0}' for extension '{1}' to IIS site '{2}'.
msg_add_verb = Adding IIS Http Verb '{0}' to site '{1}'.
msg_add_host_entry = Adding host entry for '{0}' into the hosts file.
msg_validate_host_entry = Validating host entry for '{0} in the hosts file'
msg_loopback_note = note: we're not disabling the loopback check all together, we are simply adding '{0}' to an allowed list.
"#
}

Answer 1

The problem is nothing to do with importing the module; powershell isn't very helpful in leading you to the issue. The root of the issue didn't reveal it's self until I put the -VERBOSE switch on the import. Once I did that, I got a new error above the old one.
: Parameter attributes need to be a constant or a script block.
FullyQualifiedErrorId: ParameterAttributeArgumentNeedsToBeConstandOrScriptBlock
Essentially, I was using ValidatePattern with double quotes instead of single quotes. Check and make sure your writing your regex patterns correctly when you use ValidatePattern
# Bad
[ValidatePattern("^[a-z]$")]
# Good
[ValidatePattern('^[a-z]$')]