STDockerPS.psm1
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#requires -version 2 function DockerPs { <# .SYNOPSIS Turn "docker ps" output into custom PowerShell objects. .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 get more condensed output. 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 | select -first 3 CONTAINER_ID : 26b08e320d17 IMAGE : microsoft/nanoserver COMMAND : "cmd" CREATED : 17 hours ago STATUS : Up 17 hours PORTS : NAMES : temp1234temp1234 CONTAINER_ID : d92cb8edaf53 IMAGE : microsoft/nanoserver COMMAND : "powershell" CREATED : 39 hours ago STATUS : Up 39 hours PORTS : NAMES : temp3 CONTAINER_ID : 9c45b67925db IMAGE : microsoft/nanoserver COMMAND : "powershell" CREATED : 40 hours ago STATUS : Up 40 hours PORTS : NAMES : temp2 .EXAMPLE $Var = dockerps $Var.CONTAINER_ID # list all container IDs (but use -q for (only) that) $Var.COMMAND # list all commands $Var.STATUS # list all statuses $Var.IMAGE # list all image titles $Var.NAMES # list all container names .EXAMPLE PS C:\temp\STDockerPs> @(dockerps | Where { $_.IMAGE -like "microsoft/*" }).Count 3 PS C:\temp\STDockerPs> @(dockerps | Where { $_.IMAGE -like "microsoft/*" }).Command "powershell" "powershell" "cmd" .EXAMPLE dockerps -omit | select -first 1 CONTAINER_ID : 26b08e320d17 IMAGE : microsoft/nanoserver COMMAND : "cmd" CREATED : 17 hours ago STATUS : Up 17 hours PORTS : .EXAMPLE dockerps | select -first 1 CONTAINER_ID : 26b08e320d17 IMAGE : microsoft/nanoserver COMMAND : "cmd" CREATED : 17 hours ago STATUS : Up 17 hours PORTS : NAMES : temp1234temp1234 .EXAMPLE PS C:\temp\STDockerPs> (dockerps).CONTAINER_ID 26b08e320d17 d92cb8edaf53 9c45b67925db 520649cfb9d7 .EXAMPLE (dockerps -a).CONTAINER_ID 26b08e320d17 d92cb8edaf53 9c45b67925db 520649cfb9d7 a0fc2bb9ad1b e82a27f84cb6 #> if ($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 = @() $Headers = @("CONTAINER ID", "IMAGE", "COMMAND", "CREATED", "STATUS", "PORTS", "NAMES") foreach ($Header in $Headers) { $Indexes += $DockerPSTitles.IndexOf($Header) } $Indexes += 0 # dummy value, replaced later for each container line, small "trick".. $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. $Object = "" | Select-Object -Property ($MyPSHeaders = @($Headers -replace ' ', '_')) foreach ($i in 0..($Indexes.Count - 2)) { $Object.($MyPSHeaders[$i]) = $_.SubString( $Indexes[$i], ($Indexes[$i + 1] - $Indexes[$i]) ).TrimEnd() } if ($PreservedArgs -match '-Omit') { $Object | Select-Object -Property ($MyPSHeaders[0..($Headers.Count - 2)]) } else { $Object } } } |