Decompress transparently compressed files on Windows

README.md

Using NTFS's/Window's transparent compression was a mistake for a media library. Here's a Nushell script to decompress all files recursively.

./decompress-dir.nu ./dir

# or natively in Nushell, with tab-completions

use ./decompress-dir.nu
decompress-dir ./dir

• https://superuser.com/questions/1719973/what-exactly-does-ntfs-compression-do-to-files
• https://reddit.com/r/DataHoarder/comments/k1aqhx/is_default_windows_compression_decent/

decompress-dir.nu

#!/usr/bin/env nu

export def decompress-dir [
  dir: directory = "."  # start directory
] {
  print $"Entering directory: ($dir), setting not to compress new files and directories"
  ^compact /U /A $"($dir)/"

  ls $dir | where type == file | par-each { |entry|
    let path = $dir | path join $entry.name
    print $"Decompressing ($path)"
    ^compact /U /A $path
  }
  
  ls $dir | where type == dir | each { |entry|
    let path = $dir | path join $entry.name
    decompress-dir $path
  } | ignore
}

# for usage with `nu ./decompress-dir`
alias main = decompress-dir