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Question

I am creating a script that sums up the sizes of every file under directory red line by line from a file.

Right now the recursive search for files is working and I get a sum for sizes for each line of the source file but I am not sure on how to add all those values together.

What I have right now is:

#Read each line of a file for a directory
foreach($line in Get-Content .\file.txt) {
  #Prints the current line path
  echo $line
  #Prints a count of the files under that path and a sum of all files length
  Get-ChildItem -Recurse $line | Measure-Object -Property Length -Sum
}

The output of this scripts looks like:

T:/folder_1/folder_2/2018/12/6/A
Count    : 30
Average  :
Sum      : 522382636
Maximum  :
Minimum  :
Property : Length

T:/folder_1/folder_2/2018/12/6/B
Count    : 2
Average  :
Sum      : 2835134
Maximum  :
Minimum  :
Property : Length

How can I get the sum of every Sum output for every folder, ie, the sum of all .Sum property values?

Answer 1

Combining the suggestions by notjustme and Ansgar Wiechers :

Get-Content .\file.txt | ForEach-Object -ov results {
  # Calculate the total size for the path at hand, and
  # output the result as a custom object.
  [pscustomobject] @ {
    Path = $_
    Length = (Get-ChildItem -Recurse $_ | Measure-Object -Property Length -Sum).Sum
  }
} | Measure-Object -Property Length -Sum | Select-Object -ExpandProperty Sum

# Use $results to access the per-path values.

Note how an outer Measure-Object is used to sum the results of the per-path Measure-Object results.

---

If you don't need to store the per-path results and just want the overall sum , the solution becomes much simpler, as Ansgar observes:

(Get-ChildItem -LiteralPath (Get-Content .\file.txt) -Recurse |
   Measure-Object -Property Length -Sum).Sum

Note how the array of lines output by Get-Content is directly passed to -LiteralPath , which is supported, because both -Path and -LiteralPath are defined as [string[]] (string arrays ).