du in PowerShell?

Question

How can I get a du-ish analysis using PowerShell? I'd like to periodically check the size of directories on my disk.

The following gives me the size of each file in the current directory:

foreach ($o in gci) {    Write-output $o.Length } 

But what I really want is the aggregate size of all files in the directory, including subdirectories. Also I'd like to be able to sort it by size, optionally.

Answer 1

There is an implementation available at the "Exploring Beautiful Languages" blog:

"An implementation of 'du -s *' in Powershell"

function directory-summary($dir=".") {    get-childitem $dir |      % { $f = $_ ;          get-childitem -r $_.FullName |             measure-object -property length -sum |               select @{Name="Name";Expression={$f}},Sum} } 

(Code by the blog owner: Luis Diego Fallas)

Output:

 PS C:\Python25> directory-summary  Name                  Sum ----                  --- DLLs              4794012 Doc               4160038 include            382592 Lib              13752327 libs               948600 tcl               3248808 Tools              547784 LICENSE.txt         13817 NEWS.txt            88573 python.exe          24064 pythonw.exe         24576 README.txt          56691 w9xpopen.exe         4608 

Answer 2

I modified the command in the answer slightly to sort descending by size and include size in MB:

gci . |    %{$f=$_; gci -r $_.FullName |      measure-object -property length -sum |     select  @{Name="Name"; Expression={$f}},              @{Name="Sum (MB)";              Expression={"{0:N3}" -f ($_.sum / 1MB) }}, Sum } |   sort Sum -desc |   format-table -Property Name,"Sum (MB)", Sum -autosize 

Output:

PS C:\scripts> du  Name                                 Sum (MB)       Sum ----                                 --------       --- results                              101.297  106217913 SysinternalsSuite                    56.081    58805079 ALUC                                 25.473    26710018 dir                                  11.812    12385690 dir2                                 3.168      3322298 

Maybe it is not the most efficient method, but it works.