recursive statistics on file types in directory?

Question

I did a website scrape for a conversion project. I'd like to do some statistics on the types of files in there -- for instance, 400 .html files, 100 .gif, etc. What's an easy way to do this? It has to be recursive.

Edit: With the script that maxschelpzig posted, I'm having some problems due to the architecture of the site I've scraped. Some of the files are of the name *.php?blah=blah&foo=bar with various arguments, so it counts them all as unique. So the solution needs to consider *.php* to be all of the same type, so to speak.

Answer 1

You could use find and uniq for this, e.g.:

$ find . -type f | sed 's/.*\.//' | sort | uniq -c
   16 avi
   29 jpg
  136 mp3
    3 mp4

Where find recursively prints all filenames, sed deletes from every filename the prefix until the file extension, uniq assumes sorted input and uniq -c does the counting (like a histogram).

Answer 2

With zsh:

print -rl **/?*.*(.:e) | uniq -c |sort -k1n

The pattern **/?*.* matches all files that have an extension, in the current directory and its subdirectories recursively. The glob qualifier . selects only regular files. The history modifier retains only the file extension. print -rl prints one match per line. uniq -c counts consecutive identical items (the glob result is already sorted). The final call to sort sorts the extensions by use count.