[Powershell] Copy and rename files as defined in a CSV mapping file

Ha! What a title. I have no idea how else to describe it.

This is really a Part 2 to my earlier blog post, Powershell: Create files in a directory from a CSV list

In that post, I created a massive list of documents. Now the script I really needed was to rename them based on a mapping in a CSV document.

Brief:

  • Copy a file from one directory to another, renaming them based on a mapping CSV document;
  • Actions get logged;
  • Check file exists before copying, log then skip
  • Log if the file is being overwritten or not

CSV File Headers

The Powershell Code:

Notes:
Most of the code is done in a few lines, however for my purpose, I really needed to have everything logged as we generate formal reports on basically everything we do!
I’m a big fan of timestamping my log files, hence the $date-documentcopy.log line.
Also, I like being able to see what’s going AND having it log to file, so I duplicate the Add-Content and the Write-Host lines.
I rather like the Write-Host “copying” and Add-Content “copied” line. The reason for this is I have some large files (>2GB) so *if* it fails I can see on-screen which record it was but the log has it once it’s finished.