STDockerPS.psm1
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#requires -version 2 function DockerPs { <# .SYNOPSIS Turn "docker ps" output into custom PowerShell objects. By default omit the name column (so long as it remains the last one and names can't have spaces). .DESCRIPTION The parsing to "objectify" relies on the column widths in this case, rather than my usual approach of using regular expressions, since it seems more robust for this case/output at hand. Use the parameter --OmitNames (will not be tab completed), to omit the name column for the containers. This is to remedy a broken part of my own brain - or for condensed output - if you prefer. Just "--Omit" will work as a minimum. Otherwise "docker ps --help" is what you should read for further information about the available parameters. -q / --quiet is special-cased to work identically as in the native "docker ps -q" (lists only container IDs). .PARAMETER OmitNames Omit the container name column. Not tab completed. "-Omit" is the shortest allowed form. .EXAMPLE dockerps CONTAINER_ID : d92cb8edaf53 IMAGE : microsoft/nanoserver COMMAND : "powershell" CREATED : 19 hours ago STATUS : Up 19 hours PORTS : CONTAINER_ID : 9c45b67925db IMAGE : microsoft/nanoserver COMMAND : "powershell" CREATED : 19 hours ago STATUS : Up 19 hours PORTS : CONTAINER_ID : 520649cfb9d7 IMAGE : microsoft/nanoserver COMMAND : "cmd" CREATED : 20 hours ago STATUS : Up 20 hours PORTS : .EXAMPLE $Var = dockerps $Var.CONTAINER_ID # list all container IDs $Var.COMMAND # list all commands $Var.STATUS # list all statuses $Var.IMAGE # list all image titles .EXAMPLE PS C:\temp\STDockerPs> @(dockerps | Where { $_.IMAGE -like "microsoft/*" }).Count 3 PS C:\temp\STDockerPs> @(dockerps | Where { $_.IMAGE -like "microsoft/*" }).Command "powershell" "powershell" "cmd" .EXAMPLE (dockerps -names)[2].Names temp1 .EXAMPLE (dockerps -names)[0] CONTAINER_ID : d92cb8edaf53 IMAGE : microsoft/nanoserver COMMAND : "powershell" CREATED : 19 hours ago STATUS : Up 19 hours PORTS : NAMES : temp3 #> if ($Args -match '-q|--quiet') { docker ps ($Args -replace '-Omit') return } else { $PreservedArgs = $Args | ForEach-Object { $_ } # deep copy $DockerPSOutput = @(@(docker ps ($Args -replace '-Omit')) | Where-Object { $_ -match '\S' }) } $DockerPSTitles = $DockerPSOutput | Select-Object -First 1 # Since we ((for) now) have a predictable and logical starting point for each # column (same char as the header), I will play with SubString to PSobjectify the stuff... $Indexes = @() $Headers = @("CONTAINER ID", "IMAGE", "COMMAND", "CREATED", "STATUS", "PORTS", "NAMES") $Indexes += $DockerPSTitles.IndexOf($Headers[0]) $Indexes += $DockerPSTitles.IndexOf($Headers[1]) $Indexes += $DockerPSTitles.IndexOf($Headers[2]) $Indexes += $DockerPSTitles.IndexOf($Headers[3]) $Indexes += $DockerPSTitles.IndexOf($Headers[4]) $Indexes += $DockerPSTitles.IndexOf($Headers[5]) $Indexes += $DockerPSTitles.IndexOf($Headers[6]) $Indexes += 0 # dummy value, replaced later # max name for a while was 5... (the length of "NAMES") $DockerPSOutput | Select-Object -Skip 1 | ForEach-Object { Write-Verbose -Message "Current line: $_ (length: $($_.Length))." #-Verbose $Indexes[-1] = ([String]$_).Length # Avoid spaces in the titles for easier access later. $Object = "" | Select-Object -Property ($Headers -replace ' ', '_') foreach ($i in 0..($Indexes.Count - 2)) { $CurrentHeader = $Headers[$i] -replace ' ', '_' $Object.$CurrentHeader = $_.PadRight($Indexes[-1], ' ').SubString( $Indexes[$i], ($Indexes[$i + 1] - $Indexes[$i]) ).TrimEnd() } if ($PreservedArgs -match '-Omit') { $Object | Select-Object -Property @($Headers[0..5] -replace ' ', '_') } else { $Object } } } |