20

How do I rename all files in a directory, recursively, changing one file extension to another, for thousands of files in thousands of subfolders? I see a lot of commands that do almost what I want, but not quite.

find . -name "*.andnav" -exec rename .andnav .tile {} \;
syntax error at (eval 1) line 1, near "."

...

rename -nv 's/\.andnav$/\.tile/i' *.andnav
0.png.andnav renamed as 0.png.tile
21

Figured it out

find . -name "*.andnav" -exec rename -v 's/\.andnav$/\.tile/i' {} \;
./0/0.png.andnav renamed as ./0/0.png.tile
./0/1.png.andnav renamed as ./0/1.png.tile
./1/0.png.andnav renamed as ./1/0.png.tile
./1/1.png.andnav renamed as ./1/1.png.tile

of course remove the -v when actually doing it, or it will waste time displaying all the files

13

Something like:

find . -name '*.andnav' -exec sh -c 'mv "$0" "${0%.andnav}.tile"' {} \;
  • this one worked best for me – cwd Jul 17 '11 at 21:04
13

With zsh:

autoload zmv
zmv -n '(**/)(*).andnav' '$1$2.tile'

Remove the -n to actually perform the renaming.

4

I found this method is easier and easier to read:

find . -name "*.andnav" | rename "s/\.andnav$/.tile/"

At least on Ubuntu derivations rename takes a list of files from STDIN if none are on the command line. And this can be tested easily with:

find . -name "*.andnav" | rename -vn "s/\.andnav$/.tile/"

until you get it right.

0

Rename files and directories with find -execdir | rename

If you are going to rename both files and directories not simply with a suffix, then this is a good pattern:

PATH="$(echo "$PATH" | sed -E 's/(^|:)[^\/][^:]*//g')" \
  find . -depth -execdir rename 's/findme/replaceme/' '{}' \;

The awesome -execdir option does a cd into the directory before executing the rename command, unlike -exec.

-depth ensure that the renaming happens first on children, and then on parents, to prevent potential problems with missing parent directories.

-execdir is required because rename does not play well with non-basename input paths, e.g. the following fails:

rename 's/findme/replaceme/g' acc/acc

The PATH hacking is required because -execdir has one very annoying drawback: find is extremely opinionated and refuses to do anything with -execdir if you have any relative paths in your PATH environment variable, e.g. ./node_modules/.bin, failing with:

find: The relative path ‘./node_modules/.bin’ is included in the PATH environment variable, which is insecure in combination with the -execdir action of find. Please remove that entry from $PATH

See also: https://askubuntu.com/questions/621132/why-using-the-execdir-action-is-insecure-for-directory-which-is-in-the-path/1109378#1109378

-execdir is a GNU find extension to POSIX. rename is Perl based and comes from the rename package. Tested in Ubuntu 18.10.

Rename lookahead workaround

If your input paths don't come from find, or if you've had enough of the relative path annoyance, we can use some Perl lookahead to safely rename directories as in:

git ls-files | sort -r | xargs rename 's/findme(?!.*\/)\/?$/replaceme/g' '{}'

I haven't found a convenient analogue for -execdir with xargs: Xargs: change working directory to file path before executing?

The sort -r is required to ensure that files come after their respective directories, since longer paths come after shorter ones with the same prefix.

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