Bash edit and rename files

This post goes over how to edit and rename files with Bash.

Edit files

Replace strings in files in a directory:

find <DIRECTORY> -type f -exec perl -i -pe 's/<MATCH>/<REPLACE>/g' {} +

For example, to replace files with the string .d.ts with .d.mts in the ./esm/ directory:

find ./esm/ -type f -exec perl -i -pe 's/\.d\.ts/\.d\.mts/g' {} +

The backslash \ escapes the period ..

Replace strings in files in a directory:

find <DIRECTORY> -type f -name '<MATCH>' -exec bash -c 'mv "$1" "<REPLACE>"' _ {} \;

For example, to rename files that end with .d.ts to .d.mts in the ./esm/ directory:

find ./esm/ -type f -name '*.d.ts' -exec bash -c 'mv "$1" "${1%.d.ts}.d.mts"' _ {} \;