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I'm attempting to clean out a bunch of temporary files from a folder tree, but don't want to delete files that match some criteria, specifically executable files, .tpl files, and not the subfolder 'data'.

I see the question here

Delete files in a directory that match a regexp, using a Mac terminal

is almost what I'm looking for, but they have a regex they are trying to match, and I have a regex that I don't want matches. I can do this to find all of the files I don't to delete:

find . -executable -o -regex '.*\.tpl'

Is there a way to invert the matches, like -v does with regex?

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2 Answers

up vote 6 down vote accepted

Is there a way to invert the matches, like -v does with regex?

Use negation(!):

find . -executable -o ! -regex '.*\.tpl' -exec rm -i {} \+
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Ah, I didn't know about the negation! From here I was able to figure out to use -a rather than -o, So the final command looks like find . ! -executable -a ! -regex '.*\.tpl' -exec rm -i {} \+, which matches my criteria of deleting everything except executables, subfolders, and .tpl files. –  EvilAmarant7x Jun 27 '11 at 15:22
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A convenient way to run a command for everything except files matching certain conditions is to exploit -o's short-circuiting behavior, e.g. find -cond1 -cond2 -o -exec command means “if cond1 and cond2 then do nothing, else execute command”.

find . -type f -executable -o -name '*.tpl' -o -exec rm -i {} \+

To exclude the data directory, use the -prune action, which means “skip this directory and don't recurse into it”. Use -name data to match all directories called data, or -path ./data to match only at the toplevel.

find . -type f -executable -o \
       -name '*.tpl' -o \
       -type d -name data -prune -o \
       -exec rm -i {} \+

Bonus: the same in zsh.

rm -i -- **/*~*.tpl~data/*(.^*)
  • The ~ operator excludes files matching certain patterns (you must do setopt extended_glob first).
  • **/ performs recursive globbing
  • The . glob qualifier restricts the whole match to regular files, and ^* excludes executable files (^ negates the qualifiers that come after it; qualifiers are anded).
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