CheckFor-ProfileUpdate.psm1
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Function CheckFor-ProfileUpdate { [CmdletBinding()] param( [string]$name = "" ) BEGIN { Function Get-LastUpdated { [CmdletBinding()] param( [string]$name ) Write-Verbose "Checking whether cached profile update file for $name exists." $cachedProfileUpdateFile = Get-CachedProfileUpdatePath -Name $name if (-not ([IO.File]::Exists($cachedProfileUpdateFile))) { Write-Verbose "Cached profile update file does not exist." return [DateTime]::MinValue } $line = Get-Content -Path $cachedProfileUpdateFile |` Select-Object -First 1 $pattern = "\s*(?<ts>\d{4}(?:\-\d{2}){2}T\d{2}(?::\d{2}){2}\.\d{7}Z)\s*`$" if (-not ($line -match $pattern)) { Write-Verbose "Cached profile update file does not contain a date/time pattern." return [DateTime]::MinValue } $timestamp = [DateTime]::Parse($matches["ts"]) $timestamp = $timestamp.ToUniversalTime() return $timestamp } Function Needs-Update { [CmdletBinding()] param( [string]$name ) $DEFAULT_CHECK_FOR_UPDATES_FREQUENCY_IN_DAYS = 1 $checkForUpdatesFrequencyInDays = $Env:CHECK_FOR_PWSH_PROFILE_UPDATES_FREQUENCY_IN_DAYS if (-not $checkForUpdatesFrequencyInDays) { $checkForUpdatesFrequencyInDays = $DEFAULT_CHECK_FOR_UPDATES_FREQUENCY_IN_DAYS } $lastUpdated = Get-LastUpdated -Name $name $now = (Get-Date).ToUniversalTime() Write-Verbose "$($name): Last updated: $lastUpdated; Now: $now." Write-Verbose "$($name): Last updated: $(($now - $lastUpdated).TotalDays) days ago." Write-Verbose "$($name): Checking for updates every $checkForUpdatesFrequencyInDays days." Write-Verbose "$($name): Do we need to check for updates: $(($now - $lastUpdated).TotalDays -gt $checkForUpdatesFrequencyInDays)." if (($now - $lastUpdated).TotalDays -gt $checkForUpdatesFrequencyInDays) { $version = Get-ProfileVersion -Name $name $remoteVer = Get-ProfileVersion -Name $name -Remote Write-Verbose "Checking timestamp for profile $name." Write-Verbose "Local version: $version; Remote version: $remoteVer" $needsUpdate = ($remoteVer -gt $version) if (-not $needsUpdate){ Write-Verbose "Updating last update check timestamp for profile $name." Set-LastUpdatedProfile -Name $name } return $needsUpdate } else { Write-Verbose "Skipped checking for updates for profile $name." } return $false } } PROCESS { if (($name -ne "profiles") -and (Needs-Update -Name $name)) { $_n = "Profile '$name' "; $_a = "$name " if (-not $name) { $_n = "Main profile "; $_a = "" } Write-Host "$($_n)has new version. Type 'update-profile $($_a)-reload' to update." -ForegroundColor Yellow return $true } return $false } } |